US1542452A - Reversing mechanism for valves - Google Patents

Description

June 16, 1925.

O. HIVELY RBVERSING MECI'IANISIl FOR VALVES 3 Sheets-Sheet 1 Filed Sept.. 10. 1924 A@ nj/ww hull KW Rw ww June 16, 1925.

Q. HlvELY xnvsnsms uscrumzsu rox vALvss med sein. 1o. 19u

3 Sheets-Sheet 2 June 16, 1925.

O. HIVELY REVERSING MECHANISI GR VALVES 5 Shets-Sheet 5 med' sept. 1o. 1924 e w w w.. M i! d 2 Y j. ,0

Frrae/Yf r Patented June A16, 1925.

'I ossIAN; HIVLY, or' ALLIANCE, oiiio.`

l nlnvnnsiive Msoniinrsra roavarivns.

vTaall whom it may concern:

Be it known thatI, OssIANQILlivLY, a

y citizen ofy theUiiited States of America, and v'resident of Alliance, county of Stark, and State of Ohio, rhave invented certainnew and `useful Improvements in VReversing Mechanism for Valves, of which/the following is speciication. j

. This invention relates lbroadlyfto reversing 'valves for furnaceaand more specifically to reversing mechanism for Vthe valves of regenerative heating furnaces. f

Theprimary object of the invention toy provide azsimple and 'improved' form of apparatus or lmechanismwhereby' is effected fthe necessary` preliminary elevation .of .the` reversing valve `structure vof a regenerative.

. furnace forfbreaking the waterseal, followed by shifting movementlof the 'valve for openingandclosing the parts to reverse the direction of the air andgas currents.A

\ A further iniportantobject is toA provide vvalve reversing mechanism of Vthe character f e referred tovwhich eiiectually guards against "over-travel yoftlievalve iii' the reversing jniovements of the latte-r.

-Vvithffthese and: "other important objects in view,lthe inventionresidesin the features of construction, arrangement "of parts f andl :a

`conibinationsf of 'elements which will hereiiiafterA be fullyfr described, reference being `had to the accompanying drawings,y in

which-f i n -r Figure `1 is a top* Vplanvievv of 'th'ein-4 v-ention lwith parts'of the structure omitted;- Figure 2 is a sectional elevation ofthe V same, the section `beingtake'n substantially lowery 'pawlin underlying seated relation to f shifting of the valves 'in reversed position; k1 y, y. Y Figure 7 is a top :plan view of'the invenr` Figure is asimilarview showing the theliftingarm;l i

i --Figure' 6l is asimilar view -shovvingthe position assumedv the partsjfollowing ne direction to tion, illustrating its applica-tion;-:l`

".Figure 8 is a sectional-elevation; and-- movement` Application filed September 10, Y1924:. vvSerial No.`v736,944.

f. Figures-9 and 10 are diagrammatic views .of the, valvesillustrating the two lopposite positions assumed by the valves with respect to the various ports. Y

Referring to said drawings, 1. indicates generally the usual form of bearing employed in anordinary type of valve revers- .ing mechanism which includes `anuprit'qht post-.like support 2 carried by the rotary ,v member glaof. the bearing. '.Fulcrumed upon the post 2 is the outergend of an arm 3 which is fixed to a horizontally disposed pin t journaled in supports 5 fixed to a main frame 6. Saidmain frame 6, which is rotatable about 5 and vertically Amovable with respectto the supporting structure 7 for ythe vbearing v1, carries thereon a n hood-lilre valve 8 of arcuate formy designed to he f shifted for effecting reversal of the travel of ,air

and gas :currents with respect t0' the .regenverators (not shown).

Said bearing 1 is located centrally with respect to a circular arrangement of'air and gas ports with vertical descending flues connecting with the air and gas regenerators. As ordinarily, there arek employed two sets of air and sgas ports "arranged at opposite sides of; a `port 9 opening into `a stack flue,l as shown in Fig.

7 wherein the rair and` gas at oneside are designated 10 ,and 11, respectively, and the air and rvgasports at the other side are designated 10 and 11', respectively. The yvalve 8 at one limit of its shifting movement overlies the air; and gas ports 10 and 11 and .the stack-flue port `9, providing passage to thel stack `foroutgo`ing products i of combustion; -At the same time, a hood-like f valve meinbertlQ carried by the mainframe occupies a position wherein it constitutes a .duct ifor the passage of -ingoing gas from the gas producers to the regenerators, heilig kdisposed to connect.' port `11l` to the centrally located. overhead producer Hue 13. kAt the opposite` limit of movementfof the valve mechanism, the .valve 8 overlies and provides passage from ports 10 and 11 to the stack-fine port 9, 'while the valve-member 12 connects port 11 to the overhead producer iue 13.` V

Power for elevating and rotating the reversing-'valve structure between the positions indicated is suppliedy byl an electricmotor 14 which operates through suitable gearing to rotate a horizontal shaft 15 journaled in aV stationary portion of 'the base structure.v

Fixed on said shaft is a. cam 16 upon the periphery of which rides a roller 17 carried by an intermediate portion of a lever 18. Provided in the outer end of said lever is an open longitudinally extending slot 19 in which is received a portion of the shaft 15 located adjacent to said cam 16. Said lever, which normally occupies an inclined position, as shown in Fig. 8, has its opposite end pivotally connected to an upwardly and outwardly inclined arm 20a formed on a lever 20which is rigidly mounted on t-he pin 4 and which carries upon its free end a balance weight 21.

In their normal positions the valves 8 and 12 are seated in trough-like water-containing channels 38 forming water-seals. Consequently, said valves must be elevated to a height aording clearance therefor prior to shifting movement for effecting reversal thereof. Such elevating movement is effected in the iirst quarter revolution of the shaft 15, the cam 16 acting through the roller 17 to thru-st inwardly the lever 18 which, in turn, produces elevation of the arm 20, pin 4 and the thereto-attached `main frame 6 and the valves/8 and 12 to the extent required, said parts being elevated upon the fulcrum constituted by the post 2.

Therst quarter revolution of the shaft 15, above referred to, carries a crank-arm `22 which is fixed to said shaft from it's normal vertically depending position, shown in Fig. 2, to the horizontal position shown in Fig. 4, wherein its outer end portion directly underlies the end of a pawl 23 which is piv-otally mounted `upon a pin 24 carried by the upper end of a link 25. Said link is rigidly carried upon the outer end of an arm 26 which is loosely mounted upon the shaft 15. The. pawl 23 is constituted by one arm of a bell-crank lever of which the oppo-` site arm 27, herein termed a dog, rests upon the free end of a leaf spring 28 which has its opposite end pivoted at 29 upon the shaftembra'cing end of the arm 26 and which is fulcrumed intermediate its ends upon an.

`of the link 25, which end is lowermost, as

shown in Figs. 2, 4 Vand 5, has mounted thereon a bell-crank similar to that described as mounted at the opposite end of the link. the same forming a pawl 23 and a dog 27. In the position shown insaid Figs. 2, 4 and 5, the dog 27 rests upon a seat or stop 31 formed on one end of a bracket 32 carried by the main frame 6. The weight of the 'superposed parts being sustained by said dog 27, the same is caused to be elevated against the pressure exerted by its spring 28, similar to spring 28, and the pawl 23 is resultantly swung back a distance sufiicient to afford clearance for the crank-arm 22, as shown in Fig. 4. As the crank-arm 22 is rotated clockwise from the 90o position shown in Fig. 4, it carries therewith the arm 26 and the mechanism borne by the latter to the reversed position shown in Fig. 6. In the initial part of said movement, the weight supported through the dog 27 is lifted off the latter, allowing the spring 28 to swing the pawl 28 into underlying relation to said crank-arm, as shown in Fig. At the approach to the limit of the clockwise movement of said mechanism, the dog 27 seat-s upon a stop 31 located at the end of the bracket 32 opposite the stop 31, and the weight of the then lowering parts acts to swing the bell-crank, of which said dog 27 and the pawl 23 constitute parts, to the position shown in Fig. 6, in which position said pawl 23 is withdrawn from underlying relation to the Crank-arm, allowing the latter to complete its revolution to the vertical position vshown in Fig. 2, during which the valves are lowered into their channels for forming water seals.

A laterally extending wrist-pin 33 is carried by the outer end portion of the arm 26, and pivotally mounted on said wrist-pin is an end of a connecting rod 34 which has its opposite end mounted in like manner upon a pin carried by theadjacent end of a horizontally disposed rack bar 36 which is slidably mounted upon a guide-member 6,n formed on the main frame 6. Said rackbar has the teeth thereof operatively engaged with the teeth of the gear segment 37 which is fixed upon the upper part of the stationary support.

In practice, when the main frame and the thereby-supported valves 8 and 12 have been elevated, as hereinbefore described, to a height providing clearance therefor with respect to the water-seal channel portions of the structure, the arm 26 and the therebycarried link mechanism are swung or Ifotated throughout an are of approximately 180o, as hereinbefore described. In said rotary movement, the connecting rod 34 is moved longitudinally, eifecting longitudinal sliding movement of the rack-bar 36 throughout the distance required to rotate, through the intermediacy of the gear segment 37 and main frame 6, the valves 8 and 12 carried by said frame from the positions shown in Figs. 7 and 9 to the positions shown in Fig. 10.

Obviously, the reversal of the valves in counter-clockwise direction isl eifectedby reverse/rotationof the motord ivesliaft,J

scribed provides fori shifting of @the.jvalvesy throughout the requireddistance only, there-' byelfectually to prevent overtravelofthe-f 4valvvt-is and to obviate theserious results i `which such overtravel frequently entails;-v

- Furthermore, yitmwill be apparent that con;

tinued k"rotation'of 'fther mot-or kfollowing vshiftingfof the valves, dueto failureof the motor cut-out Jto fiinctionat the proper l5' l'tinue the rotation of 'fthe crank-arm 22, which rotation win no way interferred time, can have nolotheretfect than to con- "with, ythe uppermost dog readily yielding in thev manner 'of faratchetr as `said, crankpasses thereby. y "Wha-t is claimed" isf- 1. In a reversing valveA mechanism for' furnaces', vthe combination withA a circulary arrangement Yof air, gas and stack ports' having lwater-seal .channels forming valve f seats,l ofV a rotarypframe carrying' valves, stationarilyfmoiinted power shaft, a cam y lowering ofsaid` frame for seating and n nseating said valves, a'nd',`ineans lwhe'reby Asaid frame is vrotated "following ,elevation thereof: for shifting sai'dl `valve, 'in' relation y valve vertically, means to effect Vrotation carried bysaidv shaft, means yintermediate said cam andsaid frame whereby rotary movement l of the VVformer effects raising and to said ports, said rotating means ',vcoinprisbar whereby rotary movement Vof. the'former actuatesy shifting movement ofthe latter.

, 2. In areversin'g valve mechanism for fui'- elevation of saidfframe, of na gear segment fixed on saidv frame, a: longitudinally shift-y able rack-bar `operativelyV engagedA with* said segment,`a power shaft, an arm loosely mounted on said shaft for rotary movement between certain` limits, a connecting rod joining said rack-bar tov said' arm whereby rotary movement of the latter actuatessliding movement of said rack-bar, a crank arm fixed on said shaft, pivoted members carried by said loose arm, springs normally holding said members in the path of rotary movement of said crank arm, and supports adjacent to the opposite limitsV of movement of said loose arm adapted for having said pivoted members alternately seat thereon and to hold the seated member out of said path of'movement 'of Vthe crank arm.y

3. The combination of valves mountedy for foward and reverse rotary movements,

betweenv certain limits, v means intermediate ,said member and vthe valve mounting where- -i'- @by movements'of the former effect shift- Itwillbenoted that the vme'ehanisinf'de-v` ing off'the latter,y ar power actuated crank arm, pivoted elements having mountings in fixed' relation t'o said member, resilient )means normally holding said elements in the'path ofmovement of said arm, and stops at' theopposite limits of,movement of said whereby said kstructure is elevated in the first part and lowered in the final part of the Voperating movements of said shaft, a lpivotally *mounted member rotatable between vtwo-opposite limits, means intermediate- ,said member andv said lvalve structure yand actuated by movements of the former whereby the latter isshifted from one Voperative position to the other,-a positively 'rotated rmember adaptedto positively engageA said pivotally mounted member durihga vpart oi its vrotation for carrying the'last mentioned member'ffromA one limit of movement to the other whilesaid structure remains elevated.

5. "Inv combination with a rotary and vert-imeans operated by the shaft tol move the of.` the vvalve structure including opposed parts, and means carriedby the shaft for alternate engagement with said opposed parts to rotate the valve structure in .op-

posite directions.

6. In combination with a rotaryJ and vertically movable valve strnct-ure, a rotary shaft,

means operated by the shaft to move the valve structure vertically, means to edeet rotation of tliegvalve including opposed parts, means 'carried bythe shaft for alter- `nate enga-gement *with said opposed parts to rotate` the valve structure in opposite directions, means to engage and hold said means carried by the shaft in predetermined positions, and means to mount the opposed parts whereby upon engagement with said holding means to allow said means carried Vby the shaft to continuously rotate past the opposed parts.

7. In combinationV with a rotatable and vertically movable valve structure, means to move the valve structure vertically, means to effect rotation of the valve structure, rotatable means to actuate each of the said means, oscillatory means carried by said rotatable means, means to arrest and hold the oscillatory means in predetermined positions, and means fixed to the rotatable means vfor alternate engagement with said oscillacally-movable'valve structure, a rotary shaft,

`tory means for effecting both clockwise and rotatable means to effect Oscillation of the oscillatory means, and means to arrest and hold the oscillatory means in predetermined positions.

9. In combination with a rotary and vertically movable valve structure, means to raise and lower the valve structure, means to rotate the valve structure, means to actuate each of said first named means, independent means carried by said actuating means, and means fixed to the actuating means for alternate engagement with said independent means whereby to effect rotationV of the valve structure in vopposite directions.

10. In vcombination with a rotary and vertically movable valve structure, means to raise and lower the valve structure, means to rotate the valve structure, means to actuate each of said first named means, independent Ineans carried. by said actuating means, means fixed to the actuating means for alternate engagement with said independent means whereby to effect rotation of the valve structure in opposite directions,

means to enga-ge and arrest movement of ture rotating means in predetermined positions, and means movabler with the rotatable mea-ns Afor engaging the valve structure rotating means to actuate same in opposite directions.

l2. In combination with a rotatable and vertically movable valve structure, a shaft, means'whereby upon turning of the shaft the valve structure will be moved vertically, means connected to the valve structure and loosely connected to the shaft to rotate the valve structure, movable dogs on the said rotating means, means fixed on the shaft and alternately engageable with the dogs to move the rotating means in opposite directions, and stop means alternately engageable with the dogs to arrest the movement of the rotating means and to move the engaged dog to permit said means fixed on the shaft to continue rotating with the shaft wit-hout effecting further movement of the rotating means.

13. In combination with a rotatable and vertically movable valve structure, a shaft, means whereby upon turning of the shaft the valve structure will be moved vertically, means connected to the valve structure and loosely connected to the shaft to rotate the valve structure, spaced movable means on the rotating means, means fixed on the shaft and alternately engageable with the spaced means to move the rotatingr means in oppositedirections, and arresting means alternately engageable with the spaced means to arrest the movement of the rotating means and to move the arrested vone of the spaced means to permit the means fixed onthe shaft to continue rotating with the shaft without effecting further movement of the rotating means.

In testimony whereof, I affix my signature in presence of two subscribing witnesses.

OSSIAN HIVELY.

lVitnesses H. E. DUNLAr, MARTIN T. lNIANIoN.

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