US425610A

US425610A - Rotary balanced valve

Info

Publication number: US425610A
Authority: US
Publication date: 1890-04-15
Anticipated expiration: 1907-04-15

Description

(NoModgL) 2 Sheets-Sheet 1.

A 0. R. HAWKINS.

ROTARY BALANCED VALVE.

No. 425,610. A Patented Apr. 15, 1890.

nveniar:

(No Model.) 2 Sheets-Sheet 2.

G. R. HAWKINS. ROTARY BALANO-ED VALVE. .N0. 425,610. Patented Apr. 15, 1890.

fizb" izzamey.

UNITED STATES PATENT OFFICE.

CHARLS R. HAWKINS, OF CINCINNATI, OHIO.

ROTARY BALANCED VALVE.

SPECIFICATION forming part of Letters Patent No. 425,610, dated April 15, 1890.

Application filed September 9, 1889. $erial No. 323,380. (No model.)

To all whom it may concern.-

Be it knownthat I, CHARLS R. HAWKINS, a citizen of the United States of America, and a resident of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Rotary Balanced Valves, of which the following is a specification.

The several features of my invention and the various advantagesresulting from their use, conjointly or otherwise, will be apparent from the following description and claims.

In the accompanying drawings, making a part of this specification, Figure l is a vertical central section of the upper portion of a cylinder, steam-chest, and valve embodying my invention, the valve being in cross-section, the steam-chest and cylinder being in longitudinal section, the steam-ports for admit-ting steam to the cylinder being shown as closed by the valve. Fig. 2 is a vertical central section of a steam-cylinder, steam-chest,

valve,and valve-box embodying my invention, the section as regards the cylinder and steamchest being a longitudinal one and as regards the valve and valve-box being a transverse one. In this figure the valve is shown as admitting steam to one steam-inlet port of the cylinder and connecting the exhaust with the other or opposite steam-inlet port of the cylinder. Fig 3 is a view in perspective of the valve proper of my rotary balanced valve. Fig. 4 is a view in-perspective of a steamchest receiving said valve and box. Fig. 5 is a view of the box containing the valve-chamber. Fig. 6 is a horizontal central section of the steam-chest and of the box containing the valve-chamber, that view of the section being shown which is apparent when the upper half of the steam-chest and valve-box is removed. Fig. 7 is an end View of the valve. Fig. 8 is an enlarged vertical central transverse section of my rotary valve. Fig. 9 is a view in perspective of the ring at end of the valve. Fig. 10 is a vertical central longitudinal section of one end of my improved valve, valvechamber, and steam-chest. Fig. ll is a view of one end of the steam-chest and the nut employed to lock the valve andvalve-box in position. Fig. 12 is an. elevation of the side of valve-chest and its exterior accompanibox.

' ment, and showing a steam-cylinder in end elevation.

Oindicates a cylinder of any desired description, having a piston 0, operating a piston-rod C reciprocating through the end of the cylinder, one end of the interior space of the cylinder being connected, as usual, with square in form, provided with the sides A A and ends A A This steam-chest is located, preferably, upon the top of the cylinder 0. Of whatever shape the steam-chest may be, in any event it should be provided at each end with the recess or guideway A A B indicates the valve-box. This valve-box contains valve-chamber B, cylindrical in form, for the reception of the rotary valve. For convenient adaptation to the various cylinders in use having a flat surface through which the ports 0 O and 0 open the bottom B of the valve-box is flat. In the lower portion of the valve-chamber B are three ports B B B and these ports are continued downward through the bottom B of the valve- VVhen the valve-box'is placed in position, the. port B will coincide with the port 0 to form one continuous passage from the valve-chamber B to the interior of the cylinder 0, and the port B will coincide with the port 0 and form one continuous passage to the other end of the interior of the cylinder j, and the port B will coincide with the exhaust-port C and form one continuous passage for the exhaust-steam to be conveyed away.

The steam-chestAsurrounds the valve-box B, each end of the valve-box B being held in position within the steam-chest by suitable means, preferably by the guideways A A already described. In the latter case one end of the valve-box fits between the edges of the guideway A in one end of the steam-chest and the other end of the-valvc-box fits within the recess A in the other end of the steamchest. e

IOO

Steam is admitted to the valve-chamber B other.

7 near to and over the cylinder,substantially,

h the topof the i is provided with a suitable top A. Thejoints chest are made steam-tight, and so; are the t which separates recess D from recess D, are

. surfaceof the anIextensionlR. valve there are'four extensions R and at the sions Rffl each set of four extensions R 'ezc tending'outbeyond the ends ofthe central end of the main or central supporting portensions R of one end of the cylinder an by passages, as B B one of these passages being'formed" in and extendiug'through' the sides of the valve-box B from its exterior to it the valve-chamber B, passage B being at one side of the valve-box and passagefi on the- WVhere the valve and its ports are placed as shown in Figs. 1 and 2, the steam-chest will-then rest upon a proper facing locatedat cylinder 0. The steam-chest between the top and the walls of the steam- ,joints between the steam-chest and the face or bottom upon which it rests. The bottom of the valve-box B and the face *upon which it rests are ground smooth andutog ether form a steam-tight joint, the pressurefof steam in the steam-chest pressing downnpoh thevalvebox to form', in conjunction with theface' on which it rests,a steam-tight joint.

The'central supporting portion of the valve consists of a cylinder D, provided with three large longitudinal recesses D, D and D In the longitudinal wall R, lying between recess I) and recess D is a similar longitudinal recess R and in the longitudinal wall 'R',

two similar parallel longitudinal recesses R Each of these recessesreceives a rib'R gwhich may be properly termed a pacEing-strip. This rib R consists of a proper material for use asa packingnamely, cast-steel or equivalent material. The outer surface of each rib R extends beyond the general peripheral 'ce'ntral supporting portion D of the valve.

The recesses R and the packing-ribs R extend th entire length of the central support-j ingiportion D of the valve, and each end of each rib R is provided at its inneredge with Thus at i one end of the other end ofthe valve there are four extensupporting portion D of the valve. Ateach tion D of the valve a lug D fixed thereto, is presentgfor a purpose shortly to be specified. Around the extensions R at one end of the cylinder is placeda ring R, and at the other end of the cylinder a similar. ringR embraces the four ends R of the ribs R These rings it prevent longitudinal displacement of they'packing-r'ibs R Within the four ex-- elastic ring R is present,whichexerts an elastic pressurejoutwardly upon the extensions R, and consequently upon the packing-ribs R At the other end of the cylinder asiinilar ring It, within the ends oft-he extensions R exerts an elastic pressure in the direction outward from the axis or stem of the'valve, and thereby coacts with the rings R at the other each of the packing-ribs B, through the agency of' the elastic ringR or its equiva-fi end of thewvalve outwardly the Thevalve is located within the valve-cham-j lentdevice, is pressed outward against the interior'surface of the'valve-chamber B,and'

thus forms a tightpacl ing-joint, which pre .vents the passageof steam from any one of the recesses D D D to any of the othersaid recesses.

Atthe end of the valve is a solid ring R3 whose inner sideiits against the outer edge .of the elastic ring R and the outer edge of the exterior ring The exterior ring- R, elastic ring R and end ringR are prevented from rota ii g by means of the aforemention'ed lug'D in the following manner: The

ring R has a slot through its periphery, and when placedin position; upon the valve the t lug Dpasses through said slot S. The elas tic ring R also hasa slot S, and when in po-I sition upon the valve the" lug D passes through thisslot. Onthe inner side of the elastic ring, R and bordering upon the edge of its central opening B, through which latterpasses the stem of the valve, is fixed a ringRihaving'aslot S in its periphery.

When the ring'R is inposition, the ring R surroundsthe valvestein E inside of the dais tic ring R", and the lug D passes through the slot S Thus the ring R and the elastic ring R and the exterior ring R will be prevented from rotating around the valve-stem loo E. All friction occasioned by the rotation of these rings is thereby obviated.

Attheother end of thevalve is found similar setflof ringsfasl B R, and Bland 19's" these rings are applied to the adjacent end. I

of the valve in the samemanner as the rings heretofore described are attached to theirfi, end of the valve,and the adjacent stud D.

prevents the revolutionof the said second set of ringsR R, and R in thecsame manner as the stud D at the first-named end of the. cylinderprevents the rotation r of the firstnamed set of rings R R,andR

In each end of the'steammhestis an opening A The diameter of each of these openings Af: is substantially that of .the diameter of the valve-chamber B in valve-boxB. When the ,valve-boxB is placed in position in the steamchest,the respective ends of said valve-box fit into the respective guideways' A Not the chest, as shown in Fig.6, and the bottom of the valve-box will rest upon the face 0", on which] are the months of the steaimports communi-" cating with thecylindenC and the exhaust the port-passage Biof the valve-box meeting the port-passage C leading to the cylinder.

port communicating with the exhaust-pipe G andforming one continuous passage, and the port-passage B of thevalve-box meeting the 39 port-passageCi of j the cylinder and forming j one continuous passage therewith, andYeX haust-port passage BF meeting the exhaust C and forming one continuous passage therewith.

The rotary valve is passed through" one of, the openings A' in one end of the steam-chest A into the valve-chamber B of the valve-box. It is secured in position by the following means, namely: A discal head A is provided with an outlying flanges a and another portion of its periphery is provided with a screwthread A and the inner portion of its periphery A is smooth. This discal head A is provided on its inner side with a recess or opening A, into which the shorter end of the valve-stem E fits. The head A is screwed into the opening A and the shorter end of the valve-stem E enters therecess A of the discal headA. This recess A thus forms a bearing in which the shortend of the valvestem rotates. The smooth portion of the periphery A of this discal head A enters within the end of the valve-chamber and fits closely therein and prevents the valve-box from vertical elevation. the discal head in and out its flanged end A is provided with notches A for affording to a suitable wrench a means of engaging with said head and turning the latter. At the other en d of the valve-stem E is a discal head A, provided with a similar flange A having notches A and provided with a peripheral screw-thread A for a purpose hereinbefore mentioned in connection with the aforementioned discal head A. The smooth peripheral inner end of this last-named discal head A .fits within the adjacent end of the valvechamber B and prevents vertical elevation of the valve-box. The opening or bearing A of this last-mentioned discal head A extends through the discal head. This head is screwed into the other opening A of the steam-chest, and preferably extends beyond the latter, substantially as shown in Fig. 12.. The recess A of this discal head forms a bearing in which this end of the valve-stem may rotate. To the outer end of this end of the valve-stem is connected an arm F of suitable description. This arm F is suitably connected with mechanism whereby the valve is oscillated.

The operation of my valve is in general as follows: Steam being admitted into the steamchest A through the inlet-steam opening A presses the valve-box B securely down upon the face O and prevents any steam from e11- tering between the lower face of the valve-box and the face G, containing the ports O 0', and C The steam through the cylinder ens ters into recess D of the valve through opening A of the valve-box, and steam enters recess D of the valve through openings B of the valve box, and the ports B and D being closed by the ribs R R all admission of steam to the cylinder is for the time cutoff. As the steam has free'access into the valve-chamber through. the openings B B of the valve-box, the steam does not unduly press down the For convenience in screwing valve-box, but exerts within the valve-chamber an upward as well as a downward pressure, thereby contributing to balance the valve box and valve. The valve being rotated to the position shown in Fig. 2, the steam admitted from the steam -ohest through opening B into recess D of the valve passes through the continuous ports B G into the cylinder behind the piston G and drives the latter forward to the other end of the cylinder in the usual manner.

Atthe same time therecess D of the valve connects the exhaustport B with the continuous port 13 O and allows the gases in the other end of the cylinder in front of the piston to escape outof the exhaust. Vhen the piston has arrived at that end of the cylinder atwhich the port 0 enters, the valve is caused to assume a position exactly the reverse of the one shown in Fig. 2. Then the recess D of the valve connects the continuous port B C with the inletopening 13 in the valve-box, and steam from the steam-chest passes through the opening B recess D and port B G into the cylinder and impels the piston back through the cylinder. At the same time the exhaust B is connected with the ports B C -and allows the gases in front of the cylinder to escape out of the exhaust. Thus by this oscillation of the valve the piston is reciprocated back and forth, and this reciprocation of the piston will be continued so long as the valve is oscillated.

\Vhile the various features of my invention are preferably employed together, one or more of the said features may be employed without the remainder, and in so far as applicaas and for the purposes specified.

2. A rotary balanced valve having recesses D D D and longitudinal recesses R each containing a rib R provided at each end wlth extensions R and ring R embracing said extensions, and the elastic ring R, lying within said extensions and pressing outwardly against the said extensions R substantially as and for the purposes specified.

3. A rotary balanced valve havingrecesses D D D and longitudinal recesses R each containing a rib R, provided at each end with extensions R and ring R embracing said extensions, the elastic ring R, lying within saidextensions and pressing outwardly against the said extensions R, and lug D passing through the slots in said rings R R, substantially as and for the purposes specified. Q 4. A rotary balanced valve having recesses D' D D and longitudinal recesses R, each containing a rib R, provided at each end with extensions R and ring R, embracing said extensions, the elastic ring R, lying within said 5 extensions and pressing outwardly against the said extensions R and lug D passing through the slots in said rings. R R, and the box surrounding said valve and having its respective ends respectively located in the ad acent recesses of the said valve-chest, a space being left between each side of the valve-box and the adjacent side of the steamchest, substantially as and for the purposes specified.

6. The steam-chestA, provided with guideways A A and valve-box B, containing 1'0- 2 5 tar 1 valve, the respective ends of the valvebox B being provided with side openings B B and the lower openings B B", the valvechalnber B containing a rotaryvalve working therein, substantially as and for the pur 3o poses "specified.

7. The steam-chest A, provided with guideways A A valve-box B, lying within said steam-chest and fitting into said guideways A A, the valve-box being provided with side 3 5 openings B B and lower openings BB B, the valve being provided with recessed divisions .D- D D and with valve-stem E, the steamchest being provided at each end with screwthreaded openings A, and discal head A,

40 screwed into said openings, each discal head being provided with opening A, forming a bearing for its'adjacent portion of the valvestem, one end of the valve-stem projecting through and beyond one of the discal heads and provided with arm or lever F, substantially as and for the purposes specified.

S. The steam-chest A and valve-box provided with valve-chamber B the steam-chest Abeing provided with openings A receiving the discal heads A, having bearings A for the valve-stem, the valve being located in the valve-chamber B, the ends of the discal heads respectively entering the adjacent ends of the valve-chamber, substantially as and for the purposes specified.

9. The discal heads A, provided with notches A screw peripheral portion A, steam-chest A, provided with openings A, valve-box B, having valve-chamber B, valve stem E, rotating in openings A in the respective discal heads A, the smooth peripheral portion A of the discal heads extending into the adjacent end of the valve-chamber, and j the screw-thread of the disk engaging a screw- Qthread upon the adjacent opening A in the lsteam-chest, substantially as and for the purposes specified.

10. Thesteam-cliest A, provided with end guideways A A, screw-threaded openings A A located in the ends of the said steam-chest, jvalve-box B, having valve-chamber B openjings B B in the sides of the valve-box and connecting the interior space of the steam ifchest with the valve-chamber B, and lower openings B B, connectingthe valve-chamber with the corresponding ports 0 C of the icylinder, and lower opening B of the valvebox connecting the valve-chamber with the exhaust C, and rotary valve B, having recesses D D D and intervening longitudinal "recesses R, each recess havingthereon a 1ongitudinal rib R, provided at each end with an extension R and slotted rings R A, and ring R, having slotted ring R and valve- St-6111 E, andlugs D D, each lug lying within the slots of the adjacent rings aforementioned, and the discal heads A, having openings A, receiving the valve-stem, said heads A being provided with peripheral screwthread A and smooth portion A at each end of the valve-chamber, substantially as and for the purposes specified.

CHARLS R. HAWKINS;

Attest:

A. L. HERRLINGER, G. A. W. PAVER.