US841095A - Safety-valve for high-pressure tanks. - Google Patents

Description

.. I IEEEEHH No. 841,095. PATENTED JAN. 8, 190?.

E. F. OSBORNE. SAFETY VALVE OE HIGH PRESSURE TANKS.

' APPLICATION FILED MAR.19. 1903. I

fitwnfinz l 16 F 06' Borne S W I lag flltorucgg UNITED STATES PATENT OFFICE.

EUGENEF. OSBORNE, OF CHICAGO, ILLINOIS.

SAFETY-VALVE FOR HIGH-PRESSURE TANKS.

To all whom it may concern:

Be it known that I, EUGENE F. OSBORNE, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Safety-Valves for High-Pressure Tanks and I do hereby declare that 'the following is a full, clear, and exact descriptiongthereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. This invention relates to a novel safety valve which is designed to be used in connection with receptacles containing a fluid under high pressure, such as tanks or cylinders for liquefied carbon dioxid. v

The object of the invention is to provide an improved valve of this character which is so constructed as to prevent leakage of the fluid from the tank with which the valve is used in case the part of the valve which projects from said receptacle be broken off by accident or design.

if The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of a valve made in accordance with my invention. Fig. 2 is an axial section of the valve, and Fig. 3 is a perspective view showing the construction of the safety-valve and stem.

As shown in said drawings, A designates a valve-casing provided interiorly thereof with a conical valve-seat a, and A designates a tapered valve-plug engaging said seat and provided with an operating-shank A which projects through an opening in the front end of the valve-casing.

B designates a tubular plug, which is provided at its forward end with a reduced screw-threaded portion 6, which has screwthreaded engagement with an interiorlyscrew-threaded cylindric opening formed in the rear end of the valve-casing, said plug being provided at its rear end with a screwthreaded portion 1), which is adapted to have screw-threaded engagement with the dis charge-orifices of the receptacle in connection with which the valve is to be used. As herein shown, the rear end of the valve-casing is rearwardly flaring and is provided at its rear end with an annular recess or groove which surrounds said plug B and within which is located a packing-ring 6 of solder or the like. The channel or bore 5* of said tubular Specification of Letters Patent.

Application filed March 19, 1903. Serial No. 148,565.

Patented Jan. 8, 1907.

plug opens at its forward end into a cylindric passage a in the valve-casing located at the rear end of the plug A and constituting the valve-chamber. The valve-plug A is provided with a short axial passage a and with a port a. The latter passage, when the plug is rotated to bring it into one position, is adapted to register with an axial passage 0 of a tubular branch 0, which is formed upon or connected with the valve-casing, as shown in. Fig. 2. I

E designates a spiral spring which is interposed between the rear end of the valve-plug A and the plug B and which acts expansively to hold said valve-plug against its seat.

The inner end of the tubular plug B, when inserted in the wall of the receptacle, extends a distance inside of the said wall. (Indi cated in Figs. 1 and 2 by the dotted lines.) Said plug is, moreover, provided at the extreme inner end of the passage 1) thereof with an annular seat I). Said seat may, however, be otherwise located than at the end of said passage. D designates a valve-closure adapted to engage said seat. Said closure has its inner or contact face made conoidal, so as to afford an accurate fit between the closure and its seat when the parts are brought into engagement.

1) D designate a two-part stem connected with the valve-closure. Said stem is located within the passage b of the tubular plug B and has guiding engagement with the walls of said passage. Said stem is constructed to permit the free flow of fluid through the passage b notwithstanding the presence of the stem therein, and, as herein shown, consists of four longitudinal radially-arranged wings b ,-which have engagement with the passage at four different points in the circumference thereof. The portion D of said stem engages at its inner end the rear face of the valve-plug A when the parts of the valve are in their normal or operative position, and said two-part stem is of such length that when its inner end so rests against the plug A and the two parts thereof are in contact with each other the valve-closure D will be unseated or held away from its seat, so as to permit the flow of the liquid into and through the valve. Said inner end of the valve-stem is cut away, as shown at b*, to permit free access of the liquid to the axial passage a of the valve-plug. As a means for preventing the complete detachment from the plug B of that portion of the two-part valve-stem which is ITO formed on or connected the closure D, I

, have shown one or more of the wings as cut away to provide therein a notch b and a pin b as inserted in the said plug, so as to ex} tend across the passage 6 and through said notch.

The branch C- is adapted for connection with a pipe, as F, which leads to the point at which the fluid which passes through the valve is used. As a means of connecting said p'ipe'to the branch, said pipe may be provided with a collar F, having screw-threaded engagement therewith and provided at its inner end with a radial flange f, arranged flush with the end of the pipe. (Jr designates a coupling-sleeve which has screw-threaded engagement with the branch C and is provided with an interior annular shoulder g, which fits against the outer face of the radial flangef of the collar F. Between said flange and the outer or adjacent end of the branch is interposed a fibrous or other yielding packing-ring I, which when the parts are brought into the position shown in Fig. 2 serves to afford a fluid-tight joint between the same.

The purpose of the invention, as before stated, is to prevent the escape of gas from the receptacle in case the outer part of the valve is broken away. When the valve is not in use, it performs the function of an ordinary valve, being turned to the position shown in Fig. 2 when it is desired to discharge the fluid from the receptacle or to fill the receptacle therethrough, and to be rotated into another position when the valve is to be closed. So long, therefore, as the parts are in their proper positions the safety or check valve 1) is off its seat by reason of the engagement of the outer or forward end of the valve-stem with the valve-plug A and affords no hindrance to the free flow of the fluid through the valve. In case, however, the valve be broken away at any point between the valve-plug A and the receptacle and said parts drop away fromtheinnermost portion of the valve which remains attached to the receptacle, the pressure of the fluid within the receptacle acting against the valve-closure D will act toimmediately force the same against its seat, such movement-of the valve being permitted by reason of the fact that nothing will then remain to prevent the *free longitudinal movement of the valvestem through the passage. When, therefore, such breakage occurs and the valveclosure Dis thrown, by the pressure of the fluid thereon, against "its seat, the dischargeorificc will 'be closed, so that the passage of the fluid therethrough'will be'prevented.

The valve-stem may be made continuous or inone piece; but it isdesirable to make a two part-stem and locate the joint between the two arts thereof inside of the outer-surfaceof t ewallof thereceptacle in whichthe valve is'used,sothat the inner portionof said of the valve would twist the stem in such manner as to prevent the accurate seating of the valve-plate D.

When the tanks or receptacles with which this valve is used are being transported, it is desirable that the shank A of the valve-plug be protected, and such protection is herein shown as afforded by means of a cap H, Fig. 1, which has screw threaded engagement with an eXteriorly screw-threaded tubular extension A of the valve casing, through which the said shank extends. Moreover, the branch '0, when disconnected from the pipe F, will also be closed against the escape-of the fluid therefrom, which may leak through the valve, by means of a similar cap.

I claim as my invention 1. The combination with a valve-casing provided with a part which is adapted for insertion into the wall of a receptacle, said part being provided. with a valveseat, of an inwardly-opening valve-closure, means normally maintaining said valve away from its seat, and a two-part stem connected with said valve and located within the bore of said part which is inserted into the wall of the receptacle, said par-ts bein joined inside of the outer surface of the wal of the receptacle, and the inner part of the stem having interfitting connection with a part in the bore of the casing.

2. A valve mechanism comprising a tubular section the inner end portion'of which is adapted for insertion into the wall of a receptacle and which is provided at its outer end with a conical valve-seat arranged with its central axis in line with that of the tubular section, said valve-seat being smaller at its outer thanat its inner end, a rotative, iconical valve-plug fitting said seat and provided withmeans, connected with its outer,*smaller end, for turning the same, a spring acting on the inner end of said valve-plug to hold the same in contact with its seat, vand an inwardly-opening check-valve, located at the innerend of said tubular-section and provided with a two-part stem which at its :outer end has-endw-ise bearing engagement with the inner face of the said valve-plug and thereby maintains the check-valve normally open; the parts of saidstem havingseparable-endwise engagement with each other within the part of :the tubular section which is inserted into the wall of the receptacle.

3. The combination with a valve-casing having :a chamber provided :with :an annular seat, and a 'rotative -valve-plugthereinhaving a port adapted for communication with a passage which leads :to the exterior valve of the casing, said casing being provided with a tubular part adapted for communication with the interior of a receptacle, and provided with a valve-seat, of a valve-closure provided with a stem which extends through the bore of said tubular part and engages at its end remote from the closure a part of the valve which serves to hold said closure away from its seat, said valve-plug being operable independently of the valve-closure at the inner end of the device.

4. The combination with a valve-casing having a chamber provided with an annular seat and a rotative valve-plug therein having a port adapted for communication with a passage which leads to the exterior of the casing, said casing being provided with a tubular part adapted for insertion into the wall of a receptacle, and having a valve-seat, of a valve-closure provided with a stem which extends through the tubular part and bears at its end remote from the closure against the valve-plug; said stem being composed of two parts which meet end to end at a point inside of the outer surface of the said wall of the receptacle.

5. A valve comprising a casing provided with a part which is adapted for insertion into the wall of a receptacle, said casing being provided with a chamber which communicates with said receptacle, a valve-seat in said chamber, a closure engaging said seat, a two-part stem connected with said closure,

receptacle and an axial chamber which communicates with the receptacle, a seat in said chamber, a valve-closure engaging said seat, a rotative valve-plug having a bore which communicates with the outer end of said chamber, said chamber being provided with a discharge-opening with which the bore of the valve-plug is adapted to be brought into communication by rotation of said plug, and a two-part stem for said valve-closure which engages said valve-plug in a manner to normally hold the closure away from its seat, said stem being divided at a point inside of the outer surface of the wall of the receptacle.

In testimony that I claim the foregoing as my invention I aflix my signature, in presence of two Witnesses, this 13th day of March, A. D. 1903.

.EUGENE F. OSBORNE.

Witnesses WILLIAM L. HALL, GERTRUDE BRYCE.

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