US2431283A

US2431283A - Valve

Info

Publication number: US2431283A
Application number: US470075A
Authority: US
Inventors: Spence Paulsen
Original assignee: Spence Engineering Co Inc
Current assignee: Spence Engineering Co Inc
Priority date: 1942-12-24
Filing date: 1942-12-24
Publication date: 1947-11-18
Anticipated expiration: 1964-11-18

Description

P. SPENCE Nov. 18, 1941,

VALVE Filed Dec. 24, 1942 z 4 5 w H J 8 a W J a m a a 4 a 7 a n {I}- Mm W "3 5 9 l o 6 u a v" n m n 2 w, w a M Z 7 Z a 5.? a 5 3 a9 a w is as a INVENTOR Paulsen Spence BY ATTORNEY6.

Patented Nov. 18, 1947 2,431,283 VALVE Paulsen Spence, East Orange, N. J., assignor to Spence Engineering Company, Inc., Walden, N. Y., a corporation of New York Application December 24, 1942, Serial No. 470,075

2 Claims. (01. 137-139) My invention relates to a regulating valve and this application embodies subject-matter disclosed in my application Serial No. 304,881, filed November 17, 19 39.

It is an object of the invention to provide an improved regulating valve arranged for either hand or pilot operation.

It is another object to provide a valve having improved features of construction to facilitate certain manufacturing operations and to make for accuracy of construction and operation.

Another object is to provide an improved form of indicator for a regulating valve.

It is another object to provide improved means for controlling the discharge of pressure fluid from one or two sources such as one or two boilers discharging into a steam line.

Other objects and various features of novelty and improvement will be hereinafter pointed out or will become apparent to those skilled in the art.

In the drawings which show, for illustrative purposes only, a preferred form of the invention- Fig. 1 is a view for the most part in central vertical section, through a regulating valve and pilot, illustrative of the invention;

Fig. 2 is a more or less diagrammatic view of a pair of pressure sources discharging into a single line and embodying features of the invention.

The regulating valve shown in detail in Fig. 1 includes a valve body -5 having a high pressure side 6 and a low pressure side 1. The partition 8 between the high and low pressure sides has a threaded openingto receive a threaded valve seat member.9. The valve seat member 9 embodies a guide sleeve p tion ID for receiving and guiding the valve stem II. The valve body itself has an additional stem guide passage I2 for the stem ll so that the latter is guided accurately by the two guides concentrically with the valve seat. The upper portion of the body has an opening of a size to freely pass the valve disk member [3 secured on a reduced portion of the stem l l as by means of nuts M. The open upper end of the valve body is closed as by means of a blank flange l5 and interposed gasket, the flange being held in place as by means of bolts and nuts I6. It will be seen that by having the upper end of the valve body open and of large size, the opening in the partition 8 for the valve seat member and the guide opening I2 in the body may both be machined with one setting in the lathe and thus perfect alignment may be secured.

In the form shown, the valve body at the lower end has an externally screw threaded projection 2 I! for receiving the internally threaded diaphragm base I8. The diaphragm hood I9 is secured to the base as by means of bolts 20, and a diaphragm 2| is clamped between the base and the hood in fluid-tight manner, as will be understood. The valve stem H extends downwardly into the diaphragm chamber formed between the base and the hood and may cooperate with or be secured to the pressure plate 22 resting on the diaphragm. A compression spring 23 is interposed between the pressure plate 22 and a counterbore 24 in the extension ll of the valve body. The spring 23 serves to urge the main valve l3 toward closed position and the valve is urged toward open position by fluid pressure, as will be set forth.

The regulating valve is normally controlled by a pilot valve, which may comprise a pilot valve body 25, which has a fluid passage controlled by mean-s of a spring 28 interposed between a head 29 on the stem and a seat in the upper part of the valve body, namely, within the pilot valve dia- 5 phragm base 30. A diaphragm 3| may be secured to or cooperate with an upper part of the stem 21 and the diaphragm is clamped in fluid-tight manner between the base 30 and the hood ring' 32 secured to the base. Studs 33, constituting standards, may be secured to the hood ring 32 and a spring yoke 34 is slidable on the standards and held in various positions of adjustment as by means of the adjusting nuts 35. A spring 36 is interposed between the adjustable yoke 34 and a spring button 31 which may cooperate with an extension of the stem 21 or some part actuable by the diaphragm.

A high pressure connection, such as the pressure tubing 38, leads from the high pressure side 6 of the main valve to the high pressure side/ of the pilot valve. A low pressure connection 39 is made to the low pressure side of the pilot valve and leads to both the high'pressure side of the main diaphragm BI and to the low pressure side I of the main valve or other zone of low pressure. In the form shown, the connection to the low pressure side of the main pilot valve embodies a T-fltting 40 having a. branch 4| extending to the lower or hi h pressure side of the main diaphragm 2|. A bleed fitting 42 is located at some point in the connection. The other branch 43 from the T-fltting leads to the low pressure side of the main valve or to some other zone of, low pressure and a bleed fitting 4 4 is located in that branch.

The pilot valve is controlled by thermostatic, pressure, or other means. In the form shown, a pressure connection 45 is made to the space beneath the diaphragm 3| so that upon increase in pressure, the diaphragm will be raised and the pilot valve 26 raised or urged toward closed position. In an ordinary pressure regulator, the

connection 45 would lead to the low pressure side of the main valve so that the pilot would be controlled in accordance with the outlet pressure of the main valve.

The operation of the valve as thus far described l is as follows:

,With the pilot valve 26 in open position, high pressure fluid will pass through pressure line 38, past pilot valve 26, through the T-fltting 40, pipes 4| and 43 to the diaphragm chamber and to low A side of the valve so as to reduce the pressure beneath the main diaphragm 2| and permit the main valve I3 to move toward closed position, Under normal conditions, the pilot valve will reach such position that a balance will be established and the discharge pressure of the main regulating valve will be maintained.

It, is often desirable to operate a regulating valve by hand. With most types of regulating valves, any hand operation is exceedingly diflicult, due to pressure normally in a diaphragm chamber tending to hold the valve closed. In

3 accordance with my invention, I provide means j for converting the pilot-operated regulating valve into a hand-operated valve and cause the pressure to be balanced on opposite sides of the diaphragm so as to greatly facilitate hand operation.

In the form illustrated, I provide means for cutting of! the flow of high pressure fluid to the main diaphragm and preferably to the pilot valve point in the control lines so as to prevent the flow of high pressure fluid to the diaphragm 2| and to perm-it bleeding of high pressure fluid therefrom. The valve 46, in the form illustrated, is located in the line 38. Thus, when the cutoff valve 46 is closed, no high pressure fluid may itself. I prefer to employ a stop valve 46 at some i reach the pilot valve nor either of the lines 4 |43,

i and high pressure fluid beneath the diaphragm 2| may bleed into the low pressure side of the main valve through the bleed fitting 44. Since the upper surface of the; diaphragm 2| is subjected to the pressure of fluid in the low pressure side of the valve (because of the bleed or passage of fluid as through valve guide l2), the pressure on opposite sides of the diaphragm 2|.

will be balanced and the spring 23 will normally serve to hold the main valve l3 in closed position. I provide hand-operated means for actuating the valve l3. In the form shown; the

diaphragm hood has a valve bonnet or gland 41 screwed into it and the hand valve stem 48 is threaded into the bonnet 41 in the usual manner. A pusher plate 49 is interposed between the valve stem 48 and the lower side of the diaphragm so that when the valve stem 48 is turned up by means of the handle 58, the main diabalanced, the hand operation will be greatly facilitated.

In order to obtain a visual indication of the position of the main valve I3, I have provided an improved form of indicator. As illustrated, the blank flange l5, covering the open end of the main valve body, is provided with a threaded opening 5| preferably concentric with the valve stem The opening 5| r'eceives a bonnet fitting 52, which has a central packed passage for an indicator stem 53. The lower end of the stem may carry a pusher plate 54 engageable with the upper end of the valve stem II and a com-' pression spring 55 between the pusher plate and the flange l5 serves to maintain contact between the indicator stem 53 and the upper end of the I An indicator finger 56 may be valve stem secured to the indicator stem as by means of nuts 51, and the position of the indicator at the outside of the bonnet will indicate the position of the main valve.

One advantageous application of my improved valve is in connection with the controlling of pressures from two separate sources leading into a single line. In the form shown in Fig. 2, I have illustrated two such sources, as boilers 60 and BI. A line 82 from boiler I0 discharges into the main steam line 63 and the line 84 from boiler 6| discharges into the same steam line. A hand operated valve 65 may be positioned in the line 62. A regulating valve 68 of the type heretofore described in connection with Fig. 1 may be interposed in the line 64, It should be here stated that it is exceedingly difficult to provide automatic means for controlling and apportioning steam from two separate boilers discharging into a single line. Therefore, under normal conditions, the boiler 8| may be considered as the boiler supplying steam to the line 83, in which case the stop valve 55 may be closed completely and the pressure from boiler 8| will be automatically regulated by means of the valve in the manner heretofore described. When the second boiler 60 is to be cut in, the stop valve will be opened and hand controlled, and the regulating valve 8 8will be converted into a hand controlled valve, as heretofore described, and thus the two boilers will be'under hand control and such control has been found highly preferable under the conditions noted.

While the invention has been described in considerable detail and a preferred form illustrated, it is to be understood that various changes may be made within the scope of the invention as defined in the appended claims.

I claim:

1. In a regulating valve, a valve body having a high pressure side and a low pressure side, a main valve member for controlling the flow of pressure fluid from the high to the low pressure side, a diaphragm base on said body, a diaphragm hood on said base, a diaphragm secured between said base and hood, a valve stem extending from said valve to said diaphragm for actuation by the latter, means including a pilot valve for conducting high pressure fluid from the high pressure side of said main valve to the high pressure side of said diaphragm, bleed means connecting the low pressure side of said main valve to the high pressure side of said diaphragm, a stop valve for cutting of! connection between the high pressure side of said main valve and the high pressure side of said diaphragm, whereby through said bleed means the high pressure side of said diaphragm may be subjected to the pressure at the low pressure side of said main valve, means for subjectin the other side or said diaphragm to the pressure at the low pressure side of said main valve whereby the pressures on said diaphragm may be balanced, a manually operable valve stem carried by said diaphragm hood and in alignment with said main valve stem, whereby said manually operable valve stem may operate said diaphragm and said main valve.

2. In a regulating valve, a valve body having a high pressure side and a low pressure side, a main valve member for controlling the flow of pressure fluid from the high to the low pressure side, a fluid pressure actuated member for actuating said valve member, means including a pilot valve for conducting high pressure fluid from the high pressure side of said main valve to the high pressure side of said fluid pressure actuated member, bleed means connecting the high pressure side of said fluid pressure actuated member to the low pressure side or said main valve, 9, stop valve for cutting on connection between the high pressure side of said main valve and the high pressure side or said fluid pressure actuated member, whereby through said bleed means the high pressure side of said fluid pressure actuated member may be subjected to the pressure at the low pres- REFERENCES CITED The following references are of record in the flleof this patent:

UNITED STATES PATENTS Number Name Date 1,678,459 Bowland July 24, 1928 1,029,600 Foster June 18, 1912 2,067,510 Spence Jan. 12, 1937 2,196,279 Thomas Apr. 9, 1940 445,041 Callahan Jan. 20, 1891 900,540 Hilger Oct. 6, 1908 1,891,547 Krichbaum Dec. 20, 1932 705,369 Manley July 22, 1902 1,069,166 Noyes Aug. 5, 1913 2 2,258,335 I Moore Oct. 7, 1941 860,797 Gaudin July 23, 1907 648,591 Metzger May 1, 1900 1,842,146 Brotherton Jan. 19, 1932 FOREIGN PATENTS Number Country Date Switzerland June 1, 1933