US997461A - Hot-blast valve. - Google Patents

Description

E. MOGARTHY.

HOT BLAST YALVE. APILICJATION FILED MARJB, 1910.

Patented July 11, 1911.

Wfnvesses.

FELIX MccAnr-HY, or ro'rrs'rowiv, PENNSYLVANIA.

HOT-BLAST VALVE.

Specification of Letters Patent.v

gPatented-July 11, 1911.

Application fileanarch 1e, 191e. seria1N.-549,6s.

To all whomfit may co'in'cerm.` v

'Be it known that I, FELIX MoCAR'ri-IY, a

lcitizen ofthe .United States,`residing at Pottstown, in the county of'Montgomery and State of Pennsylvania, have invented certain vnewand useful Improvements in Hot- Blast Valves; and I do hereby declare the following to be a full, clear, and exact de-- scription of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same. e

My invention relates to new and` usefulimprovements in hot blast valves and seats therefor and my object 1s to provide means for forming the valves and seats from asingle or ltsvo sections of material and fastening the edges thereof together to form ahollow body, said sections preferably consisting of flanged steel or iron. `f

A further object is to attachthestem of the valve to the valve proper by welding,

and, a further object is to provide a feed pipe and` so arrange the lower end thereof that the water discharged therefrom will engage the walls of the valve on .all sides.

inafter referred to and more particularly pointedout in the specification andclaims.

Inthe accompanying drawings which are made a part ofthisapplication, Figure 1 is an elevation of the valve showing the seat therefor in section and parts of the valve n broken away. Fig. 2 is a central-sectional View through the valve. Fig. 3 is atop plan view of the valve seat. Fig. A4 is a detail sectionalA view onran enlarged scale of a` portion oftheivalve. F ig. 5 isa detail ele-` vation of the lower end of the feed pipe showing a slightly modified form from that disclosed in Figs. 1 and 2.' Figs. 6, 7, 8, 9, 10, 11, 12 and 13 are detail sectional Views of various forms of valve seats showing the manner of constructing the same, and, Fig. 14 is a sectional view showing a different manner of securingthe stem to the'valve.

Referring to the drawings -in which similar reference numerals designate corresponding parts throughout the several views, 1inrnonly used in connection with hot air furneces, said valve being preferably oval inl cross section. ,The valve is constructed -in two sections, as shown 1n Flg. 4, sald sections being welded together, as shown at 2,-

to form the two sections into one solid body, which welding process may be accomplished in any preferred manner. v Previous to weld` ing the upper and lower sections of the valve together, 'a sleeve .3 is introduced through an opening 4.at"thecente'r of the upper section, the ange- 5 of they sleeve engaging the lowerface of the upper. section of the valve and by welding the sleeve to the vupper section, the'two sections will be likewise substantially integral with each other.

Securedwithin the projecting port-ion of the sleeve 3 is the usual form of stem G-,and

through'this'stem is introduced a feed pipe y7, they sleeve andstem beingl also welded together.V Instead of using the sleeve 3, the stem @.may be Vwelded directly to the valve l, as shown in Fig. 14 of the drawing.`

The object of the feed pipe 7 is todischarge water'into the;valve 1 and in order ltofcause .the water to strike and cover all` parts offthe valve, a head 8 is attached to the lower end thereof, said head having preferablyfour extensions 9 through which the water, is-discharged into the valve and by arranging said yextensions diametric'ally 'opposite each other, the water will be dis- Other objects and advantages will be herecharged over the entire surface of the valve. Insteadk of providing the head 8 and the `ezttensions 9, the lower end of. t-hefeed pipe may be covered witha cap 10 and the pipe provided with four openings 11 at a point above. the c'ap. The valve 1 normally rests upon a seat 12, which seat is in the form of a ring and hollow to form a circulating chamber 13 so that water may be kept` circulating through' lsaid seat to cool the same. lower portion of the valve 1 is preferably provided with a attenedsurface 14 so as to form a perfect union between the valve and the seat therefor, said flattened surface eX- tending entirely around the valve and being 'machined before applied to use. The seats 12 are preferably formed from one section of material, the meeting edges of which are secured together by means of welding, but if preferred, they may be made in two sections, as shown in Figs. 8 to 11. As shown in Fig. 6, the seat may be provided with a.

partition 15, which partition extends circumferentially of theseatza-nd divides the interior of 'the seat into two chambers, through which the water circulates.

In order to cause the Water to positively circulate through the valve seat, the water. is entered through one' p charged through an ad itional portl 17,

The

loo I ort 16 and diswhich ports are` spaced apart'and between said portsis a `,partition ll5", said partition" in that None of the sections of the seat is provided with a partition member which projectsl a .distance between a pair of partit-ion members carried by the opposite section of the seat, the free edges of said sections when secured together forming a complete partition.

Heretofore,` the valves and seat-s therefor have been molded from-brass, cast iron or cast steel, but when so constructed, they soon crack from the intense heat necessary to the blast furnace, thereby destroy-ing the same and as wat-er is'passing through the valves and seats, the cracking of these parts will permitvthe water to pass into thefurnace where it is turned into steam. This steam not only cools the furnace, but causes a great dea-l of trouble, as it requires a 'greater amount of fuel to heat the hearth of the furnace and frequently the furnace becomes so chilled as to completely1 destroy the products beingheated, resulting in a great loss in money. It has also been found that in cases where the watef is discharged direct from the feed pipe into the valve, should the hot blast move up one side of the valve. l

the water would be moved upthe other side of the valve in View of the intense heat at the one point, but by providing four dis- )vater passing through the valve and seat,

thereby obviating any possibility of leaks `occurring by the uncooled portions burning away.

` What' I claim is 1. hollow valve for blast" furnaces, said valve being formed in two sections, the meeting edges of which are Welded together, a sleeve welded to one of said sections forming the valve and a stem welded to said sleeve.

2. A valve construction of the class described, comprising the combination with a hollow valve and a stem projecting therefrom, of a feed pipe extending through said stem and into the hollow valve. said feed pipe being bodily removable from the valve and stem, said feed pipe having openings at its lower end arranged in pairs and dialnetrically opposite each other adapted to discharge the contents of the pipe into all parts of the valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FELIX )ICCA HTHY.

'itnesses J. HOWARD Kennin', Enw. J. MCCARTIIY.

Copies of this patent may be'obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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