US1055161A - Fluid-pressure-operated valve. - Google Patents

Description

H. G. GEISSINGBR. FLUID PRESSURE OPERATED VALVE. APPLICATION FILED SEPT.8, 1910.

1,055,1 61 Patented Mar. 4, 1913.

2 SHEETS-SHEET l.

Smwtoz 1%6I Gen-551777 7 H. G. GEISSINGBR. FLUID PRESSURE OPERATED VALVE. APPLICATION FILED SEPT.8,1910.

1,055,161. Patented Mar.4, 1913.

2 SHEBTS-SHBET 2.

UNITED STATES OFFICE.

HARRY G. GEISSINGERL, OF NEW YOBLK, N. Y., ASSIGNOR TO GEISSINGER REGULATOR COMPANY, OI YORK, N. Y., A CORPORATION OF NEW YORK.

FLUID-PRESSURE-OPERATED VALVE.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Operated Valves, of which the following is a specification.

My invention relates to valves and particularly to electrically controlled valves for controlling fluids under pressure,

One of the objects of my invention is to dispense with the use of stulting-boxes for the movable parts of the valve and to provide a compact device in which the operating parts are readily accessible.

Another object is to completely isolate the electric energizing coils from the other portions of the valve mechanism without intertering with the freedom of movement of the movable parts.

A further object is to provide a device in which the valve, when in the open position, will remain in equilibrium between certain predetermined limits of pressure variation and thus avoid any vibration or chattering upon the valve seat which produces a rapid wear and destruction of the parts.

In order that my invention may be clearly understood, reference is made to the follow ing description in connection with the accompanying drawings, in which Figure 1 is a vertical cross-section of a valve embodying my invention; and Fig. 2 is a vertical cross-section of a modified form thereof.

Referring to Fig. 1, the valve casing 1 is provided with the'usual diaphragm or partition 2, having an'annular seat 3 surrounding the valve opening and upon which the main valve 5 rests in the lower or closed position. The depending guiding lugs 6 are formed on a ring provided with an annular shoulder which secures the washer 7 within a recess in thebase or disk 5 of the valve 5.

A weighted pressure-reducing valve 8 is slidingly mounted within a central cavity 9 of the valve and in its lower position closes a channel 10 connecting the valve-cavity with the inlet side of the casing. The valve cavity is closed. at the top by means of a hollow thimble or cap 12 having a contracted orifice 13. l

The controlling mechanism of the valve is supported within a shell 15, which is preferably threaded upon a flange 16, surrounding an orifice of the valve casing concentric with the valve .stem. A disk 18, threaded upon the upper end of the shell 15, is provided with a depending plunger or piston 19. Surroundingthe piston and mounted to slide thereon is a cylinder 20, which is supported upon and presses downwardly on the valve 5, a plurality of washers or packing members 21 being interposed for the purpose of securing a tight joint.

It will be observed that the chamber 22 of the cylinder is in communication with the cavity 9 in the stem of the main valve. Communication is established between the inner cylinder chamber 22 and the shell chamber 24 by means of the passages 25 and 26, .in the plunger or piston 19, the port 27 connecting these two passages being controlled by the pilot valve 28, slidingly -mounted in the cavity'29.

For the purpose of actuating and controlling the pilot valve, an electroma net is mounted upon the disk 18, and preierably comprises a magnetic shell 30, inclosing an energizing coil 31 and central core 32 provided with a disk 33 constituting a central pole,'the annular disk or ring 34 foiming the other pole of the magnet. The plate or disk 36, forming the armature is rigidly secured to the stem of the pilot valve 28. A nonmagnetic plate 37, completely isolates the magnet coil 31 from the valve passages, while the gasket 32, forms a tight joint between the plate and the disk 18. In order that there may be no magnetic shunt or path for the magnetic flux between the magnet poles outside of the armature, I construct' the disk 18 of a non-magnetic metal. This construction insures a very strong magnetic pull upon the armature whenever the coil 31 is energized.

The operation of the valve will be understood from the foregoing description.

The valve casing being connected to a pipe conveying steam or other fluid under pressure, the steam in the inlet side of the casing will force itself through the channel sure thereon.

10, past the weighted check valve 8, into the cavity 9 and through the orifice l3 into-the cylinder chamber 22 and the passage 25, being prevented from entering passage 26 by the pilot valve 28 controlling the port 27 and will hold the main valve in the position shown. The area of the cylinder 20 is made larger than thatof the seat of'the valve in the diaphragm 2. If, for instance, the area of the cylinder is three times the area of the valve seat, then the downward force upon the valve is treble the upward pres- This downward force closes the valve against the flow of steam and maintains a tight joint between the valve stem and the cylinder which are separated by the washer 21.

The electromagnet which controls the pilot valve 28, may have its energizing coil connected in an electric circuit controlled by a thermostat which automatically responds to changes of temperature brought about by the supply of steam, regulated by the valve in the casing 1, the parts constituting the regulating elements of -a system of automatic temperature control: Upon energizing the coil 31, the armature 36 is attracted, lifting the pilot valve 28 and opening the port 27. The pressure of the pent steam in the chamber 22 and passage 25 is now relieved by passing through the port 27, passage 26, shell chamber 24 and into the outlet side of the valve casing. If the areas of the parts are as above assumed, the upward and downward forces upon the main valve will be equal as soon as the pressure in the chamber 22 falls to one-third of that in the inlet, assuming the pressure in the outlet or discharge side of the casing 1 to be zero. When, therefore, the pressure in chamber 22 falls still lower the pressure in the inlet will lift the main valve 5 from its seat. A cushion 38 relieves any shock due to a sudden upward movement of the cylinder against the piston 19.

When the pilot valve 28 is lifted or in the open position, it is apparent that the chamber 22 is in communication with the inlet side of the casing through the contracted orifice 13 in the main valve stem and with the outlet side of the casing through the pilot valve seat or port 27. The latter, as illustrated, should be made larger than the orifice 13 for reasons hereina fterpointed out.

While the main valve is lifted, the valve disk 5 assumes a position that produces a fixed proportional difference of pressure between the inlet and the outlet. There is also a continuous flow of steam through the interior channels as indicated by the arrows. The pressure in the chamber 22 will be less than that of the inlet, but greater than that of the outlet, the relative pressure being determined by the proportionate diameters of the orifice 13 and the port 27. It will be seen, therefore, that the resultant pressure in the chamber 22 automatically adjusts the drop in pressure between the two sides of the main valve disk 5.

The important function of the auxiliary weighted pressure-reducing valve 8will now be pointed out.

Unless the weight of the main valve and the parts carried thereby is in eifect'eliminated or counter-balanced by an upward sustaining force, the valve will vibrate or chatter as it is approaching its seat in the manner common to valves of this type, thus causing a rapid wear of the parts. It is apparent that the weight of the pressure-reducing valve 8, closing the passage 10, must hold back a certain amount of the steam pressure, so that, in fact, the pressure in the cavity 9 is subject to a fixed reduction in the pressure from the inlet due tothe weight of this pressure-reducing valve. This reduction in the downward pressure upon the head of the cylinder 20, or its equivalent excess of upward pressure upon the disk 5, I make equal to the Weight of the moving parts 5, and 20. The weight ofthe valve parts being thus eliminated from the pressures effecting the operation thereof,-

it thereby results that the main valve will, when in the raised or open position, remain in a osition of equilibrium governed by the respective pressures in the inlet, the outlet, and intermediate chamber 22, and the governingpressure in the intermediate chamber being determined by the relative areas of the orifice 13 and the pilot valve port 27. It results, therefore, that an increase of pres sure above the main valve when in raised. position and in a state of equilibrium, will bring the valve to its seat without the usual attendant chattering. My experiments along this line have proven that it is due to the use of the pressure-reducing valve 8, that the chattering of the main valve is eliminated. The importance of this feature will be appreciated by engineers and those familiar with the use and operation of valves for the control of steam or other fluids under ressure. The fixed reduction of pressure in the chamber 9 might be efi'ected by means of a reducing valve of the ordinarv type, but my weighted valve has points of superiority thereover in that the channel 10 can be made larger and, therefore, less liable to become obstructed, and that the channel is completely closed until the minimum amount of inlet pressure necessary to counter-balance the weight of the valve parts has been exceeded.

The several important advantages of my invention will now be apparent The electromagnetic actuating mechanism is completely isolated from those parts which are subjected to the action of the steam and yet without tion, the valve disk will take a position that the use of any stufling boxes to restrain and impede the movement of the reciprocating parts. \Vhen the valve is in the open posiproduces a fixed proportional difference of pressure between the inlet and outlet sides of the valve casing and will maintain that position in a state of equilibrium without vibration. The drop in pressure between the two sides of the main valve disk is automatically adjusted by the proportionate .28 being raised into the closed position when the armature disk 36 is attracted. The operation will be understood from the de scription and explanation of Fig. 1.

It Will be apparent to engineers in this art, that many changes may be made in the structure of the device or in the arrangement of the parts while retaining the salient features of my invention.

I claim 1. Valve mechanism comprising a main valve member having a channel therethrough, a weighted pressure-reducing valve controlling said channel, and operating in all elevated positions to etl'eet a substantial fixed reduction of pressure at points beyond said weighted valve, a passage connecting said channel with the valve outlet, and controlling means for opening or closing said passage.

2. Valve mechanism comprising a casing having an inlet and an outlet and a diaphragm provided with a valve opening, a main valve for said opening, having a channel therethrough, a weighted pressurereducing valve controlling said channel, and operating in all elevated positions to effect a substantial fixed reduction of pressure at points beyond said weighted valve, and maintaining the same closed against a pressure substantially equal to the weight of the main valve, a passage connecting said channel with the outlet, and a pilot valve controlling said passage.

-3. Valve mechanism comprising a casing having an inlet and outlet and a diaphragm provided with a valve opening, a main valve for said opening, a pilot valve controlling the operation of said main valve and a pressure-reducing valve cooperating with said main valve to eliminate the weight of said main valve as a determining factor in the movement thereof, thereby enabling it to seat without vibration.

4. Valve mechanism comprising a casing having an inlet and outlet and a diaphragm provided with a valve opening, a main 'tIlVt' for said opening, a pilot valve controlling the operation of said main'valve and a single member cooperating with said main valve to eliminate the weight of said main valve as a determining factor in the movement thereof, thereby enabling it to seat without vibration.

Valve mechanism comprising a casing having an inlet and an outlet and a diaphragm provided with a valve seat. a main valve for said seat having a channel therethrough provided with an enlarged central cavity and a restricted discharge orifice, a weighted pressure-redncing valve within said central cavity, and operating in all elevated positions to effect a substantial fixed reduction of pressure at points beyond said weighted valve, a channel connecting said oritice with said outlet and including a valve seat having an area proportioned to the area of said orifice, and a pilot'valve controlling said valve seat.

(3. Valve mechanism comprising a casing having an inlet and an outlet and a diaphragm provided with a valve seat, a main valve for said seat, a hollow shell detachably connected with said casing, a piston depending within said shell, a cylinder slidably mounted upon said piston and sepa- "rably supported upon said main valve, a channel in said valve having an enlarged chamber and connecting the inlet with the cylinder chamber, a weighted pressure-reducing valve in said chamber operating in all elevated positions to cited a substantial fixed reduction of pressure at points beyond said weighted valve, a passage in said piston connecting said chamber with the outlet, and a pilot valve controlling said passage and thereby the operation of the main valve.

7. Valve mechanism comprising a casing having an inlet and an outlet and a diaphragm provided with a valve seat, a main ive for said seat. a hollow shell detachably connected with said casing, a piston depending within said shell, a cylinder slidably mounted upon said piston and separably supported upon said main valve, a channel in said valve having an enlarged chamber and connecting the inlet with the cylinder chamber, a weighted pressure-re ducing valve in said chamber operating in all elevated positions to etl'ect a substantial fixed reduction of pressure at points beyond said weighted valve, a passage in said piston connecting said chamber with the outlet, a pilot valve controlling said passage and thereby the operation of the main valve, and means for maintaining the main valve in stable equilibrium when in the lifted or open position.

8. Valve mechanism comprising a casing having an inlet and an outlet and a diaphragm provided with a valve seat, a main valve for said seat, a. hollow shell detachably connected with said casing, a piston depending within said shell, a. cylinder slidably mounted upon said piston and separably supported upon said main valve,- a plurality of removable packing members effecting a tight joint between the cylinder and the main valve, a channel in sald valve connectingthe inlet with the cylinder chamber, a-

weighted pressure reducing valve in said 10 channel, a passage in said piston connecting said chamber with the outlet, and a pilot valve controlling said passa e and thereby the operation of the main va ve.

In testimony whereof I have hereunto set 4 my hand in presence of two subscribing wit- 1 nesses. v i

HARRY G. GEISSINGERM Witnesses: I

LAURA E. SMITH, J. H. GOLDSTEIN

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