US2640498A - Diaphragm actuated balanced gate type pressure regulator - Google Patents

Description

DIAPHRAGM ACTUATED BALANCED GATE TYPE PRESSURE REGULATOR Filed on. 19, 1949 H. G. BISSELL June 2, 1953 2 Sheets-Sheet i INVENTOR.

,HARRY- e. BISSELL BY I ATTORNEY &

H. G. BISSELL June 2, 1953 DIAPHRAGM ACTUATED BALANCED GATE TYPE PRESSURE REGULATOR Filed 001.- 19, 1949 2 Sheets-Sheet 2 INVENTOR. HARRY G. BISSELL ATTORNEY Patented June 2, 1953 DIAPHRAGML ACTUATED- BAIANCED GATE TYPES PRESSURE REGULATOR.

Harry Biss'ell, Lebanon, hio, assignor to J ordan Regulator G'o'rpora-tion, Eebanon, Ohio; a

corporation of Ohio Applicat-icm October 19, 1949, Serial No. 122,315

Claims. ("01. 137-458) This. invention relates to valves and more par ticularly to that class known as. automatic control valves.

An object of the inventionis to provide anauto-- matic. control valve for fluids, whether liquid. or. gaseous, which valve is characterized. by its. inherent sensitivity and. accuracy.

Another object of the invention is to provide a valve of the sliding. gate type wherein. th re.- sultant frictional load. applied. to the. gate. by reason of the pressure differential existing on its. opposite faces is. reduced. to a minimum, thereby insuring ease of operation of said gates A further object of the invention. is. to. provide a control valve havingv a sliding. gate which. is constructed and arranged in such a.- manner as to ffectively preclude the accumulation of scale, deposits of foreign material, or the like, which would otherwise impair the operating characteristics of the valve.

Still a further object of the inyentionis to. prolvide a control valve, the operating. characteristics of which may be controlled by any one of. a variety of standard control mechanisms, such as, by way of example, diaphragms, bellows. electrical solenoids, and other remote control mechanisms, whether mechanical or electrical, in-- cluding fioat type controls, and the like.

Still another object of the invention isto pro-- vide a pressure reducing valve having the here inabove described characteristics and. which. effective for reducing pressures throughoutranges. as great as from 10.0 p. s. i... to one-halip. s.

These and other objects are attained. by the means described herein and. as disclosed in th accompanying drawings, in which:

Fig. 1 is a vertical section through a. pressure reducing valve embodying the teachings oi the present invention.

Fig. 2 is a. section taken on lin 2-2 of Fig. I-

Fig. 3 is a perspective view of the gate control.

linkage assembly comprising a detail of the invention.

With reference now to Fig. l, the numeral [0 indicates an orifice. plate which defines or separates a high. pressure chamberAranda low pres sure chamber B. The orifice. plate is securely though releasably mounted between adjacent faces of the high pressure housing; l2- and low pressure housing M by means of bolts l6,

At this point it should be clearly understood that the instant invention is neither directed to nor concerned with the particular structural. details of the operating mechanism of the valve; however, for completeness of disclosure and clar- 2 2,. which is. disposed in spanning, relationship. be-

tween. flanges. 21] and 24', which are secured to-- gether by means of bolts. 26,. as. illustrated.

A. suitable means, such as spring 29., may be provided tor selectively controlling the deflection of diaphragm. 22... The lower end of'spring, 213 may terminate in a cap member 30, which includes. a flange portion. 32, the. lower faceofi which bears against the. upper face of diaphragm 22..

The upper end. of spring 2-8 may be engage a cap member 31 which is constructed and ar-' ranged for axial; movement to increase or de-'-' crease the. load on this spring by meansv of bolt. 36, which threadably engages the. upper portion, 38 of spring housing 40, the lower end of. which. housing terminates in out-turned flange 2'41. If desired, the lower end of bolt 36' may be provided.

with a. cylindrical bearing portion 42', which is dimensioned to. be rotatabl'y received. within a complementary socket portion. provided in. the. upper face. of cap member 34..

Movement of. diaphragm 22' is utilized for con.

trolling the operating, characteristics of the. valve. by means of. a fiangedstud 50' is secured to and carried; by cap member 30;, and

wherein the upper face of the. flange portion of flanged stud 50 clampi'ngly' engages the lower face of. diaphragm 22, whereby movement of the diaphragm will result in movement of cap 3d" and.

flanged. stud 50.

A. control rod 52' is provided. for intercom-recite" ing flanged stud 50 with. gate actuator momber 54, the lower end of which, terminates in a.

guide rod portion 56 dimensioned for sliding engagement within socket 58' 114', as illustrated.

As hereinabove stated, the present invention.

provided in housingv The present invention is directed to the strucent invention to enable an operator to reduce the efiective seating force on gate 60 to a mini- I mum, while insuring effective and efficient operation of the valve. Y

As best disclosed in Figs. 1 and 2, it will be noted that gate to is disposed on the high pressure side of orifice plate I0. Suitable openings,

denoted generally by the numeral 52, are provided in gate 60, it being noted that complementary openings 63 are provided through orifice plate I0. 7

In Fig. 1 gate 60 is illustrated in its full open position wherein openings 62 and 53 are in full alignment for permitting maximum flow of fluid from chambers A to B.

Normally, gate 60 will be urged against and in seating relationship with the high pressure face of orifice ID by the fluid pressure existing within chamber A. In those instances in which the valve is utilized as a pressure reducing valve and particularly when the degree of pressure reduction effected between chambers A and B is pronounced or extreme, the seating pressure normally exerted on gate '59 is of such a magnitude as to require the application of large forces for moving it with respect to orifice plate I0.

Gate I50 may be provided with a boss 64 to which one end of each of a pair of links 66 is pivotally secured by means of pivot pin 68. The other end of each of links 66 pivotally engages a pivot'pin "in, which extends through and is carried by a linkage plate I2, which is, in turn, pivotally secured to a pivot pin M, which spans a pair of laterally spaced boss elements I6 of a mounting stud E8.

The mounting stud is constructed and ar-" ranged to be received'within an opening 80 pro-' vided through high pressure housing I2, whereby the free outer end of stud 78 may be threadably engaged by nut 82.

With reference now to Fig. 1, it will be noted that pivot pin I and I4 are disposedin substantial vertical alignment.

' High pressure housing I2 is provided'with an opening 93 provided therein, which opens into the atmosphere. A diaphragm 92 spans'opening' or aperture 99', beingsecured in place by means of cap member 94 having a diaphragm engaging periphery 56, which is drawn into diaphragm engaging and sealing relationship by means of nut 98, which threadably engages threaded portion I00 of extension I62, which defines opening 90 in the high pressure chamber.

' In the preferredembodiment of the invention,

H2, which is constructed and arranged in such a manner as to be axially shifted by bolt H4, which threadably engages portion N6 of cap member 94. Suitable means, such as a nut II8, may be provided for locking bolt H4 in adjusted position. A closure cap H9 may be provided for. housing the upper end of bolt I I4 and lock nut I I8, as illustrated, it being observed that said closure member may threadably engage the upper outer portion of the cap member.

The lower end of stud I 08 is operatively secured to linkage plate 12 by means of link I20,

"be transmitted not only to gate 60 but also to the chamber side of diaphragm 92. In the preferred embodiment of the invention the area of diaphragm 92 exceeds the area. of gate 60, whereby the total effective load applied to diaphragm 92 will exceed the seating pressure exerted on gate 60. This force differential is transmitted from diaphragm 92 to gate 60 by means of the linkage assembly comprising stud I08, link I20, lever plate 12, and links 66, for imparting an unseating force to gate 69 which is opposed to the normal seating force exerted thereon by the pressure conditions within chamber A.

Bolt I It may be manipulated for selectively controlling the deflection of diaphragm 92, which in turn controls the eiiective seating pressure, or frictional load with which gate I59 engages orifice plate It).

The numeral I30 denotes generally an intake fitting which is inopen communication with the interior of high pressure chamber A.

It will be noted that actuation of gate 60 throughout its open and closed cycle is controlled by means of control rod 52, said gate being operatively secured thereto by means of pin I32.

Extensive tests have conclusively proven that the gate of the present valve will not become clogged with foreign material in the fluid being controlled, nor will scale or other undesirable foreign deposits accumulate on the adjacent faces of gate BB and orifice I0, whereby the operating characteristics of the valve are such as to qualify it for lifetime service.

In conclusion, it will be noted that actuating forces of small magnitude may be utilized for actuating gate 60, wherefore the range of applications of the valve is too great to warrant encumbering the record with specific applications.

It should be understood that various changes in the structural details of the device may be made, within the scope of the appended claims, without departing from the spirit of the invention.

In those instances when it is desiredto increase, rather than decrease the seating force 1 applied to a sliding gate, as in those instances of said orifice plate for decreasing the frictional load applied to the sliding gate by reason of the seating force exerted thereagainst by the pressure in the high pressure chamber, said means comprising a pressure responsive diaphragm located in an opening provided in said high pressure chamber, a link secured to and carried by said diaphragm, a link secured to and carried by said gate, a lever within and pivoted to the housin defining said high pressure chamber, each of said links independently pivoted to said lever for imparting an unseating force normal to the sliding axis of the gate in opposition to the seating force induced by the fluid pressure on the high pressure side of the gate, and means operable exteriorly of said high pressure housing for controlling the deflection of said diaphragm for varying the intensity of the unseating force applied to said gate.

2. In combination with the sliding gate of a pressure reducing valve of the type which includes an orifice plate between adjacent high and low pressure chambers, wherein the gate slidably engages the orifice plate on the high pressure side thereof, and wherein gate actuating means are provided on the low pressure side of the orifice place, of means for selectively controlling the eifective frictional seating load applied to the sliding gate by the pressure existing within said high pressure chamber, said members comprising a pressure actuated member within the high pressure chamber, a link secured to and carried by said member, a link secured to and carried :by said gate, a lever within and pivoted to the housing defining said highpressure chamber, and means independently and pivotally securing each of said links to said lever.

3. In combination with the sliding gate of a pressure reducing valve of the type which includes an orifice plate between adjacent high and. low pressure chambers, wherein the gate slidably engages the orifice plate on the high pressure side thereof, and wherein gate actuating means are provided on the low pressure side of the orifice plate, of means for reducing to a minimum the effective frictional seating load applied to the sliding gate by the pressure existing within said high pressure chamber for lessening the frictional drag to be overcome by said gate actuating means incident to movement of said gate, said means comprising a pressure actuated member within the high pressure chamber, a link secured to and carried by said member, a link secured to and carried by said gate, a lever within and pivoted to the housing defining said high pressure chamber, means independently and pivotally securing each of said links to said lever, and means exteriorly of the high pressure chamber engaging said pressure actuated member for varying its responsiveness to pressure conditions within said high pressure chamber.

4. In combination with the sliding gate of a pressure reducing valve of the type which includes an orifice plate between adjacent high and low pressure chambers, wherein the gate slidably engages the orifice plate on the high pressure side thereof, and wherein gate actuating means are provided on the low pressure side of the orifice plate, of means for selectively controlling the eifective frictional seating load applied to the sliding gate by the pressure existing within said high pressure chamber, said means comprising a linkage assembly including a link pivotally secured to the high pressure side of said gate, said high pressure chamber having an aperture therein open to the atmosphere, a diaphragm spanning said aperture, a lever and a second link operatively secured to and interconnecting said first mentioned link to said diaphragm for exerting a force on said gate at variance with the normal seating force exerted thereon by the pressure existing within said high pressure chamber, and means for controlling the deflection of said diaphragm for varying the seating force applied to said gate by said linkage assembly, whereby the degree of friction opposing free sliding of the gate on the orifice plate is selectively controllable.

5. In combination with the sliding gate of a pressure reducing valve of the type which includes an orifice plate between adjacent high and low pressure chambers, wherein the gate slidably engages the orifice plate on the high pressure side thereof, and wherein gate actuating means are provided on the low pressure side of the orifice plate, of means for selectively controlling the eifective frictional seating load applied to the sliding gate by the pressure existing within said high pressure chamber, said means comprising a linkage assembly including a link pivotally secured at one end to the high pressure side of said gate, said high pressure chamber having an aperture therein open to the atmosphere, a diaphragm spanning said aperture, a second link operatively secured to the pressure side of said diaphragm, a linkage plate pivotally secured to and interiorly of said high pressure chamber, the free end of said second link pivotally secured to said linkage plate above and toward the gate with respect to the pivotal connection of said plate with said high pressure chamber, the other end of said first link pivotally secured to said linkage plate above the pivotal connection of said second link therewith and in substantial vertical alignment with the pivotal connection of said plate with said chamber, said links, plate and diaphragm constructed and arranged to exert a counterforce on said gate in opposition to the seatin force normally exerted thereon by the pressure existing within said high pressure chamber, and means for selectively controlling the deflection of said diaphragm for determining the counteriorce applied to said gate by said linkage assembly whereby the friction opposing free sliding of the gate on the orifice plate is reduced to a minimum.

HARRY G. BISSELL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 352,382 Westinghouse Nov. 9, 1886 987,215 Clark Mar. 21, 1911 1,753,536 Scovel Apr. 8, 1930 1,790,168 Paul Jan. 27, 1931 1,918,602 Joyce July 18, 1933 1,926,069 Sutton Sept. 12, 1933 1,986,600 Pigot Jan. 1, 1935 2,212,210 Mesinger Aug. 20, 1940

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