US327548A - Valve - Google Patents

Description

(N0 MocleL) J. M. HARTMAN.

VALVE. N0. 327,548. Pa@tente% STATES PATENT OFFICE J OHN M. HARTMAN, OF PHILADELPHIA, PENNSYLVANIA.

VALVE.

PECII-IC'AIION forming part of Letters Patent N0. 327,548, datecl October 6, 1885.

Application file(l August 22, 1884. Se1ial N0. 1415217. (N0 modol.)

.l'0 all w7wm z't may concerm:

Be it known that I, JOHN M. HARTMAN, of the oity and county of Philadelphia, in the State of Pennsylvania, h2tve invented oertain new and useful I1nprovements in Gas and HotBlast Valves for Regenerative Stoves.

The following is a specifioation 0f 1ny said irnprovements, referenoe being had to the accompanying clrawings, wherein Figure l is a top o1 plan view 0f the apparatus, the firebrick lining of the upper portion being removed so as to show the valve itself. Fig. 2 is a view partly in vertical seotion, 011 the line x x 0f Fig. l, and partly in side elevation. Fig. 3 is an end view of tl1e valve-gland. Fig. 4 is a vertioal central section thereof 011 the line y y of Fig. 8. Figs. 5 and 6 are respectively transverse and longitudinal sections through the valvestem; and Fig. 7 is a section through one of the attachments by which the paoking-ring is seoured und adjusted, the soale of the five figures last mentioned being muoh enlarged.

The prinoipal fLTJUI'GS of my ixwention cousist in oomloining, With the gasconnections, a pair of valves having an intermediate escape. wher'eby any gas that leaks past the first valve is discharged into t-l1e open air; in a new manner of forming the valve-loody and seouring the valve-seat thereto; in hinging the cap of the valve so that it may be swung around horizontally; in inolining the interior of the valve-disk t0 prevent accumulation of steam, and providing an exterior shield for the edge 0f the disk; in a new manner of construct-ing the valve-stem so zus to seoure its free operation, and in rendering tl1e packing and gland readily adjustable.

The valve casing 01 body is formed in two sections similar in construction, and joined together, so as to form a continuous shell of substantially oylindrical form. These sections consist of cylindrical wronghtiron oases a a, lined With fire-brick ff 2tIld having at top and bottom annular flanged pieces c c d d, respeotively, attaohed around the innen periphery of the cases a a. The seotions are joined together by uniting tl1e bottom flange, d, of one 130 the top flange, 'c', of the other, the two remaining flanged pieces, c d, serving to mount the apparatus upon the stove, &o.,

where it is to be used. The valve-seats b b consist of hollow steel 01 wroughtdron rings attaohed to the bottom pieces, (Z d, respectively, and having connections Z) b', fo1 maintaining a water-circulation within. The fire briok linings ff are cut away 01 open a-round the upper surface of the rings b b, leaving room for the valves to elose upon their seats, as shown in Fig. 2, ancl lateral openings 0 o lead from these open spaces above the valveseats to the outsiole air. These passages 0 o are controlled by doors 12 p, the upper of which is provided with a weighted arn1 p, while the lower one p, is not weighted, and therefore Will open with a slight pressure. These openings afford acoess to the valve-seats and end of the valve-disks fo1 tl1e purpose of cleaning tbem, and the lower door also serves as an eseape for le-ukage, as will be presentl y described.

The valves q q a1e movecl in a horizontal direotion by their respective stems s s, lateral recesses or compartments, oonsisting of caps jj and nozzles k k, being provided to pern1it their withdrawal fron1 their seats.

As the connections und actuating deviees of the valves a1e similar through0nt, it is only considered necessary in the remaining portions of this speeification to describe asingle valve.

The purpose of coxnbining a pair of valves and esoape, as above speoified, is as follows: In the Operation of bot-blast apparatus the gas passing an open valve has a tendenoy to leave a deposit on its face, whiel1 prevents it from shutting tight, and when blast is put in the stove it leaks through into the gas below the valve; this gas, igniting, burns the valve and destroys the lining of the gas-flues.

In my improved valve it Will be seen that the lower door, p, is hold shut witl1 a slight pressure 0nly. Any blast now leaking past; the first valve will blow open tl1e door p and escape to the air, instead 0f passing down and burning the gas below.

I Will 110W proceed to describe the construotion of the valve and its operating devioe.

Heretofore valve-disks have been usually made with parallel facesa form whiol1 traps the steam from the water-oirculation Within tl1em and oauses then1 to oraok and leak. I

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therefore make the back 9" of the disk witl1 an incline, as shown in Fig. 2, so that 'the least depth is ab the' end or side farthest from the valve-stem s. In is also provided on the 011i;- side wich a holloW end shield, Es", so applied as to leave an air-spaoe around a portion of its periphery. to proteot the end of the valve when open against bhe heat of the passing gas.

'Ihe cap 7c and nozzle j, forming the compartmenis i'or t-he withdrawal of rhe valve, are hinged to one anobher at l, and provided With bolts and nuts along their adjacent fianges to secure tl1em when close together. A raised bea'ring-surfaoe, f extends longitudinally through Ehe cap and nozzle immediately beneath the valve-sten1 and parallel thereto. lhe valve-stem s, to whieh the valve is attached, is of tubular form and provided With pipes t t, for ma-inbaining a wabr-oirculation throughout its interior, as well as that of the valve. Near the junotion of the stem and valve I provicle, on the under side thefeof, 13W0 projecting bemings g, adapted to rest and slide freely upon bhe bezzring-surf-aoef of the oap and nozzle.

Th e projecbion of the bearing-surfaces g is sufficient L prevent; the valve-disk when withdrawn into the oap fron1 eoming in coutaob wibh the bollxom thereof, and thus the wear ot' tue valve-face which is incident to bearings heretofore nsed is prevented.

Downwardly-depending guides h (see Fig. 5) embraoe the sides of he raised bezwingsurface f and prevent the lateral displacemenl; ot the stem. The stem is aotuated by means of a pinion, w, engaging With teeth v v, Gast in the cylindrioal periphery of the Stern, and a sbop, g", is rigidly seeured to the end of the stem in such a position as to ahnt against the brackeb w, that supports the pinion w, as soon als the valve is home upon its seat.

Ileretofore it has been oustomary to plaee a stop inside of fll8 valvebody for Lhe valve'- disk to strike against and indicate when il; was shut. 'lhe dust; oolleeting on' this stop prevented the valve fron1 closing more properly indicating it-s posibion, both of whioh defeos are remedied by my improved errangement of.the stop above descriloed.

The teeth v extend along the valvestem s a sufficient distance t o permit Ehe withdrawal of the disk With'in tl1e oap. If, Ehen, access to ohe interior is desired, the bolts which seoure the oap and nozzle are debaohed, and the cap and disk are opened oub by swinging them horizontally upon the pivot Z.

Heretofore, so far as I am aware, the glands of horizontal valve-stems have hacl 110 positive means 0f lateral adjustamenb, whioh, however, is necessary 130 properly compensate for the wearing down of be valve-disk or thespringing of the stem and body by theeffects ofheat. T0 obtain such adjustmenb, I oonstruel; the gland r wit-h two horizontally-projeotsing eyes, Z Z, through which pass thescrew-studs z" i, loy which the gland is attaehed eo the end of the The pnrpose of th is shield is.

oap. The sleeve u of the gland is in e5 ternal diameter cons'iderably smaller than the internal diameter of the opening in the end of the oap into which said sleeve extends. The openings of said eyes are much larger than the dia'meter ofhestudS, thus allowingaconsiderable amount ofplay. Adjaoent to these eyes I monnt upon the gland inelined set-screws m m, bearing upon the studs i i, andl by ohe individual or comhined movement of these setscrews agreat range of adjustment of l-he gland can be obtained.

T0 prevenl; the stem fron1 jamming in the sleeve u of the glandthe size of the opening therein is made throughonn tlle upper halfof'its periphery slightly larger than the diameter of the stem, so thab the stem bears only upon the bottom portion of the sleeve. This enlargement is indicated by the lines between m and n in Fig. 3.

It1 has been usual heretofore to pack glands nular recess, g, in the gland 1" by means of a screw-gzisketz, n In the periphery ofthe gland are radial set-screws 0 o, whose inwardlyprojecting ends eure surrounded by ooiled springs e, (see Fig. 7,) whioh bear upon each segmenn of the packing-ring. .By the adjusbment of the set-sorews o the segments can be separately sei: up into proper contaot With the valve-stem, the elasbicity of the spring permitbing the packing to yield somewhat, and thus preventing any tendeney to jann.

As the ends of the teeth v 'u in the stem have the Same eylindrical contour as the main portion'of the stem itself, they ass freely through Ehe packing-ring n, and the widt-h of the ring being greater than the distanee bebween two teeth a close joint is always maintained be tween the paeking-rihg und the toothed portion of the stem.

The 1ower valve, q, is similarly construoted throughout and operated in ]ike manner as before desoriloed.

The two valves are of course intended (so loe closed and opened simultaneously to out oft or admiis Ehe gas.

I am aware filmt it is not, broadly speaking, new bo embody in a valve of ehe character above mentioned the comloinabion of -t-ho cap and the adjustable gland bolted 130 the cap, whereloy the valve may be adjusted, and I therefore disolaim such cornloination, the invention claimed in my seventh elaim being intended 130 loe restrioted to the combination of all of the parlsi-cular elements therein menbioned, or their mechanical equivalents.

I do not desire so olaim the use of aseparate ring With interna-l water-eirculation als avalveseimt; nor (lo I elaim, broadly, a donble valve,

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since these features 0f constructioi1 are not new.

VVhat I clain1 as 1ny invention, and desire to seeure by Letters Patent, is

l. In a valve-body, Ehe combination 0f the wrought-iron casing a, bhe annular flanged top und bottom pieees, c d, respectively, and the flanged ring b, mounted up0n seid bottom piece, said elements being arranged substantial1y as sei: forth.

2. The combination, with a pnir 0f slide valves arranged eonsecntively in (L conbinuous passage, 0f an intermediabe eseape-orifice and a elosing-door applied theretoin suehmanner as t0 open nnder h'ghb pressnre, substantially as and f0r the pnrposes set forth.

3. The cmnbinationwith the valvebody, 0f tl1e nozzle k, the eap j, and ehe hinge Zintermediate between seid nozz]e and eap.

4. A hollow slide-valve adapted t0 movein horizontal Dearings, and having the internal surfaces 0f 1'ts back and faee inelined, so as t0 converge t0ward the point farthest from the stem, in cmnbinatjon With an 1'111et-pipe f0r water, and a hollow sten1 whose internal diameter 1's equal to the greatest vertical height ot' Ehe interior 0f said valve-disk,whereby 1she bmpping 0f steam Within said disk is prevented, substantially 1s sei; forth.

5. The eombination, With the 110110w eylindrieal valve-stem s, having an internal Watersupply pipe, t, of Ehe teeth v v, the periphery 0f whose ends coineides with that 0f the stem, the packing-ring nwhose Width is not'iless than the distanee between two teeth, and the pinion w, engaging with saiditeeth, the whole arranged :md operat-ing substantially as Set forbh.

G. The combinationwith the valve-disk, of the h0110w shield si applied around the end thereof and projeeting beyond Ehe valve proper, substnntially as und for the purposes set; forth.

7. The eombi1mtionwith the valve-stem, 0f tl1e gland r, having a sleeve, uwhich is of less diameter than the opening in the eap, and having lnterally-projecbing eyes Z, the serewsbuds i,whereby said gland is secured to ehe eap, the stems 0f said stnds being 0f mnch s1naller diznneter than said eyes, and Ehe in clined set-serews m, bearing upon said studs, whereby the adjnstment 0f the g1and is effeeted, substantially as Set forth.

8. The eombination, with the gland, 0f the paeking-ring n, construeted in lapping segmenrs, and the radial seb-serews 0", arranged 150 bear npon szu'd segxnents, substantially as set forth.

JOHN M. HAR'IMAN.

W i tn esses:

J. WALTER DOUGLASS, 'lnos. M. SMITH.

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