US1560829A - Safety valve - Google Patents

Description

Nov. 10,1925 1,560,829

C. F. KRAUT SAFETY VALVE Filed Feb, 2, 1924 3 Sheets-Sheet 1 IN V EN TOR.

BY m Z'M AKTTORNE).

C. F. KRAUT SAFETY VALVE Nov. 10, 1925',

IN VEN TOR. MIA 6* ATTORNEY,

Nov 10 1925 15 C. F. KRAUT ,8

SAFETY VALVE Filed Feb. 2. 1924 3 Sheets-Sheet 3 R h m n H m m d0 H| V 0 1 m w A 0o. I Mr H mm H T 7 ll n 1 i 7 V- w m. I M. B II I: a J; I H, z I Z U 90... .m m m I l ll 2 I n. m a m In! 0 um v a 6 .s v 3 2 2 z n T rizrfiflmfi Patented Nov. 10, 1925.

UNITED STATES CHARLES F. KRAUT, OF BRIDGEPORT, CONNECTICUT.

SAFETY VALVE.

Application filed February 2, 1924. Serial No. 690,159.

To all whom it may concern:

Be it known that I, Crrnnnns F. KRAU'r, citizen of the United States, residing at Bridgeport, in the county of Fail-field and State of Connecticut, have invented certain new and useful Improvements in Safety Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to safety valves and is an improvement on the patent granted to me on July 9, 1918, No. 1,271,726.

The present application has for its object the construction of a safety valve which will pop without a preliminary simmer, and lift to its maximum capacity, and which can be adjusted to close from two to five pounds below the pressure for which it has been set to pop. his is accomplished by attaching a hood to the valve seating member which coacts with a double control adjusting ring. It is evident that as this ring is raised it confines the steam in an inside steam passageway and the hood, thus forming a popping chamber similar in function to an outside popping chamber formed by the valve disc and the lower portion of the double control adjusting ring.

A further object of the hood is to prevent dirt, grit, or cinders from sifting down on the valve seating member, as this would seriously interfere with the proper working of this type of valve.

.Various other objects and advantages of the invention will be pointed out in the detailed description appearing hereafter, and in order that the same may be better understood reference is had to the accompanying drawings forming a part of this specification.

In the drawings Figure 1 represents a vertical section of the improved valve, partly in section;

Figure 2 is an upper plan view of the confining hood and double control adjusting ring, sectional view of the valve seating member and spring on line 22 of Figure 1 Figure 3 is a partial plan view of: the floor of the confining hood, sectional view of the valve disc guide, on line 33 of Figure 1;

Figure 4 is a detail view of the valve disc, valve disc guide, and broken view of the valve seating member;

Figure 5 is a broken partial plan view of the base of the valve, and a partial plan view of the double control adjusting ring;

Figure 6 is a detail elevation of the double control adjusting ring;

Figure 7 is a broken sectional view of the relative position of the several elements while the valve is discharging, and

Figure 8 is a detail broken sectional view of the valve disc, hood, and double control adjusting ring.

1 represents the valve base, preferably disposed vertically and having a steam passage 2 threaded at its inlet and for attachment to a boiler. 3 is a guide integrally joined to the base by webs 4, Figures 1 and 5. The intervenin g space forming the steam ports 5 surrounded by the circularly arranged raised valve seats 6 corresponding to the raised portions 7 of the valve disc 8.

The valve seating member 9 has its lower end guided in the recess 10, Figure 1, and its upper end guided in the cylindrical wall 11 depending from the dome 12. 13 is the valve spring controlled by the adjusting screw 14.

The valve disc guide comprises the rim 15 joined to the valve seating member 9 by the webs 16, Figures 1, 3, and 7. The inter.- vening spaces between the webs forming the inside steam passages 17, seen more clearly in Figure 3. The base of the rim and Webs conform to the curved portion 18, Figure 8, of the valve disc and thus form a ball seat contact therewith. This ball seat con tact assures automatic alignment and the proper seating of thevalve disc on the raised seats 6.

19, Figures 1, 5, and 7, is a double control adjusting ring mounted on the base 1. The ribs 20 divide the ring into the outside steam passages 21, see also Figure 6. The circularly arranged teeth 22 of the ring serve, in connection with the stop pin 23, Figures 1 and 7, to maintain said ring in any of its adjusted positions.

24 is a hood adjustably mounted on the valve seating member 9, Figures 1, 2, and 7. This hood forms the popping chamber 25 and temporarily confines the steam therein, Figures 1 and 7 and acts in conjunction with the popping chamber 26 located below the valve disc and between said disc and the inner wall of the double control ring 22. The hood also serves as an umbrella preventing dirt, grit or cinders sitting down into the recess 10, thus insuring free movement of the lower end 27 of the valve seating member 9 therein. 28 is a circularly arranged floor closely embracing" the valve disc guide 15 and is connected to the hood by the webs 29, Figures 1, 3, and 7.

30 is an inside inuiiler adj ustably mounted on the depending wall 11 of the dome and is provided withthe openings 31 operating in connectionwith-the openings 32 of the dome to prevent the steam escaping in volnme.

In Figure 1, the valve is shown seated and all or the other elements are in their normal position; It will observed that thereis'a narrow vspace 61-, shown in Figure 8, between'the upper end ofthe double control adjusting ring 19 and the hood 2e and an equal space between the corner I) of the valverdisc 8 and the lower edge 0 otthesteampassage 21. These spaces or openings determine the blow down or the reduction in ,pounds'o'f the steam pressure, and are under the-control oi the adjusting ring 19. "In other words, the blow down period is increased or decreased proportionately'as thearea of these spaces vary.

lVhen the valvedisc 8 is unseated by the excess boiler pressure the steam, see arrows, :Figure'7, flows through the ports 5 and up through the inside passages 17, shown in Figure 3, into the poppingchamber 25 of the hood 24, and also into the outside popping chamber 26 and through the passages 21 of the double control adjusting ring 19. The steam in chamber 125 flows ,downward anditsiorce reacts on the flow-.28 of the .hood to prevent the valve fdisc being-unseated too long, thus allowing the same to close two .to live pounds below the pressure :for whichlit has been set ,to pop. The inclined face ,6, Figure 8, of the valve disc 8 .permitsthe steam to flow freely through the chamber 26 and also minimizes the seating resistance of the valve disc.

In cheaper constructions of the valve, the insidermufiler. 3O couldbedispensed with and the-hoodQl mounted on the cylindrical wall 11 to serve thesingle purpose of an umbrella vto prevent .cinders, dirt, &c., clogging the valve seating member 9. In which case, it neednot be adjustable.

IVhat is claimed is 1. In a safety valve of the character described, a base, vmufller dome mounted thereon, said dome having a cylindrical wall depending therefrom, an insidemuffler adjustably mounted thereon, said base having circularly arranged steam inlet ports. a valve disc therefor, a valve spring, a valve Seating member, a hood adjustably mounted thereon. to form a ,popping chamber, said hood having a floor depending therefrom, said valve sea-ting member having a valve disc guide with a ball seat contact with the valve disc, said valve disc guide having steanrpassarges' therethrough and communicating with the interior of the hood and the-steam inlet port, and a double control adjusting ring having steam passages therethrough.

2. In a safety valve of the character described, comprising a base, a double control adjusting ring mounted thereon, a valve disc 'seating member, a hood mounted on said member, said valve disc and hood coacting with said double control adjusting rin to control the steam escaping from two steam passageways located above the valve disc.

In a safety valve of the character described, comprising a base having steam ports, a valve disc therefor, a valve seating member having .a base, a valve spring having its lower end .in ball contact with the baseoi the valve seatingmembensaid valve seating men'iber having a circumferentially arranged valve disc guide in ball Contact with the disc valve.

4. In a safety valve of the character de scribed, a base having steam inlet ports,

a valvedisc therefor, a valve seating member, a hood adjustably mounted thereon, said valve seating member having a valve guide,-and'having steam passages thereo c through opening into the hood, rsaid hood having a circumferentially arranged floor projecting inwardly therefrom and upon which the steam reacts.

5. In a safety valve of the character described, comprising a base having steam inlet ports, a valve ,disc therefor, ,a valve seating .inemberhaving a valve disc guide engaging the valve .disc and having steam passages therethrough, hood adjustably mounted on the valve seating member, overhanging the valve disc and valve disc guide and forming aasteam confining chamber.

6. In safety valve of the character described. alba'se having steam inlet ports, a valve disc therefor, a valve seating member having a valve disc guide in contact with the valve disc, a hood adjustably mounted on the valve seating member and overhanging the valve disc. guide and valve disc, said valvedisc vguide having openings therethrough to form inside steam passages to adniitsteam under the hood,-and a double control adjusting ring having openings therethrough to form outside steam passages to act iii-conjunction with the said inside .steain passages.

l n testimony whereof I aiiix my signa ture.

onantns r. KR-AUT.

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