US2327524A - Automatic soot blower system - Google Patents

Description

Aug. 24, 1943.

DE LOS E. HIBNER ETAL AUTOMATIC SOOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet l Aug. 24, 1943. DE 05 5 H|BNER ETAL 2,327,524

AUTOMATIC soo'r BLOWER SYSTEM Filed April 1'7, 1940 9 Sheets-Sheet 2 1943- DE Los E. HIBNER ETAL 2,327,524

AUTOMATIC SCOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 3 ll IL. 1

Aug- 24, 19 DE Los E. HIBNER ETAL AUTOMATIC SOOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 4 Au 24, 1943- DE LOS E. HIBNER ET AL 2,327,524

AUTOMATIC 500T BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 5 1943- DE LOS E. HIBNER ET AL 2,327,524

AUTOMATIC SCOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 6 Milan Aug; 1943- DELOS E. HIBNER ET AL 2,327,524

AUTOMATIC SCOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 7 Aug. 24, 1943- DE LOS E. HIBNER ET AL 2,327,524

AUTOMATIC SOOT BLOWER SYSTEM Filed April 17, 1940 9 Sheets-Sheet 8 g- 1943- DE LOS E. HIIBQNEQR ETAL 2,327,524

AUTOMATIC 500T BLOWER S YS'IEM Filed April 17, 1940 9 Sheets-Sheet 9 JJ Z 9 2 units.

' line 8-3 of Fig. 6; Fig. 9 is Patented Aug. 24, 1943 UNITED STATES PATENTZQFFI CE, i H V ,1 I 7 2,3275%] 7 AUTOMATIC soo'r BLoWEnsYsTEM new. E. Hitnenfnumbis, starred c'.- A.r ey, a

Freeport, Pa., assignorstoVulcan Soot Blower Corporation, 'ajcorporatijon of Pennsylvania L ApplicaticnApi'il 17, 19 0, Serial No.33lig124-g U ..l."i'l.."'

' icieimg. l(01 its- 9?.) 1

J It is common practice to employ a number of soot blowing units in connection with large steam generating boilers, each unitbeing'operated,

numberof such boiler units in succession. i

i when desired, by hand or by-powen- 'Theobject A of the present invention is to produce a simple and. novel system for automatically operating a Sootblowing units commonly include jetting elements extendingtransversely of'the tubes in .the boilers, thejets in sometypes of apparatus operating. continuously in each'unit throughout the operating cycle thereof; whereas, in other instances, theietting is intermittent.

One of theobjects of the present invention is to make it possible easily and conveniently to convert the operation of a blowing unit from the continuous jetting type to the intermittent type and'bacl; again, throughthe mereact of manipulating a suitable controllinghandle orother element.

7 Viewed in one of its aspects, the prese'n'tinvention may be said to have for its object to produce a simple and novel pneumatic controlling and operating system fora series of soot blower I The various features of novelty whereby our invention is characterized will hereinafter be pointed out with particularity in'the claims; but, for a full understanding of our invention and of its objects and advantages; referencemay be had to the following detailed description taken in connection with the accompanying drawings, wherein: r v Figure 1 is a diagrammatic illustration of a system embodying the presentinve'ntion;Fig. 2

is a front view of the panel from which the system is controlled; Fig. 3 is a rear view of the panel shown in Fig. 2; Fig. 4 is a side view of the panel;

Fig; 5 is a section; on a larger scale than Fig. 4;,

through'one of the controlling valve devices-at the main air manifold; Fig. dis a side view of'the actuator for the camshaft which controls the opening and closing of the air valves of which one is-illustrated in Fig. 5; Fig. 'lis a view similar to Fig. 6, showing only the lower end 'of the device, with the parts in different positions than'those which'they occupy in Fig. 6; Fig. 8 is a section on i a section on line 3 -9 ofFig. 6 ;Fig. 10is a side elevation of antold form of blower unitappliedto a boiler, a fragment of the fitting of which is shown in section, and the unit being equipped in accordance with thepresent invention Fig. 11,-is a view'similar to Fig. 10, showing the'opposite side of the unit from that .of. brevity, the detailed description on a larger scale; on line l4"|4 of Fig'lqlh-Fig.

is a section on a still larger scale, on line I5 5 of Fig-1e; Fig .f16 is aviewlon astill larger scale showing a fragment-of the l head partly ii -side elevation'jandpartlyinsectioi'u Fig. -1 '7 isa sec-. :tion on line Il.-| l ofFig.'16; Fig 18 is asection at right anglesto the. plane of the section in Fig. 16, on a smaller scale than the latter; FigglS is'an- "elevation of the stationary: sleeve or bushing 'for the reversing valve shown inFigs. .lfiflandj 18; 1 Figs. 20, 21 and 22 arelviews-taken respectively on .lines' -43; 2 I-'-24, 22- withthevalvedn one working 3 position;- and Figs. 23, :24 and 25" i are views similar to Figs. 20,21,"and122, respectively,

showing the valve sin the second of its working Positions; L

I! In the. drawings the invention is illustrated as applied to a groupoiifiveblowingunits, the controlling system being shown large enough to accommodate an additional unit; and,.. for the sake fined to thi s'particular disclosure. i In1the diagram constituting Figure 1, X and represent upper and lower drums .of a water tube boiler,,while A, B, C,--D, and'E indicatelseparate blower units of thetypein whichthe. head portion is outside of the boiler setting'andiza .tubularjetting element extends into the ,interior of the boiler; these, five'units; beingdistributed so as to cooperate with each otherfto clean the boiler tubes; 5 l

v'lhe .cleaning units' are." supplied with steam through. a header F andsuitable branches-leading from thelatter, whereas the power'for operating the units is derived from'compressedqair 0btainedvfrom asuitablesource of supply through a pipe .I. Fromthespipe Lathe air enters a manifold 2pfrom which small; pipes 3,5. 5, 6, and 1,;lead

tontheunits A, B, C, D, and E,--respectively.

Each, of these. pipes is; provided with-an indi- L yidual pressure gauge 8.; There is a ;valve;=not

shownin the diagram. between the manifold; 2 and each of the air delivery pipes, these valves being: operated by cams on a cam shafts extendwhich appears in Fig. 10; Fig..12 is a section on ing-lengthwise 'of the manifold. ,In addition to the pipes 3 to I, there-is a sixth air pipe i0.

that leads to a whistle H; air being admitted to thepipe Hlin the-same way as, to -the;other five. The parts are so proportioned that the vaives open,;one afterthe other,-no two valves-being open at the samelti ne. Therefore, if the cycle begins with the opening of the valveleading'to will be con? 2 v the pipe 3, an five of the blower units will be brought'into service, one after the other and, after the last one has done its work, air will be admitted to the whistle to notify the attendants that a blowing cycle has been completed. An

additional air pipe [2 is. shown, simply because the manifold has been made long enough to take care of an additional blowing unit.

The cam shaftmaybeloperatedin any suitable Way. In the arrangement shown; there 'is a pointer M which, when shifted, turns a little H shaft l5 which serves to drive the cam shaft through bevel gear l5. Thecam shaft-may therefore be operated manually, if' desired,- to

open'one air valve after the'other, or' it may be operation. Automatic operation of the cam shaft may be brought about by a pressure responsive pawl "and ratchet deviceindicated as a whole at H; this device being provided with a pneumatic Qc :;t8- r :h prevents ct on-t er i;.un1ess there-ispressurein the manifold}, q he ir fi p y r p is-s own. a ib ine p ovided with a h t fi v ve L9, :a s ne ,-,a1ubri- :cator =21 a regulator-,- :22: and a valve-24 controlled 7 set at the desired starting pointrfor automatic I is closed by steam pressure and is pressure of steam Within'the head against a piston 4|. In order to permit the valve 40 to open,

the space behind the piston must be opento atmosphere; this being done in the well known 1 way by means of a pilot valve device 12 such as; is illustrated in Fig. 12.

Heretofore, in manually-operated apparatuses, the pilot V valve has been shifted toward the right from its normal position, indicated in Fig. 12,, by pressing against the outer end of the valve stem 44. In the arr-angement shown, there is mounted on the side of the head, in registration with the 'stemof'the 1 pilot valve, aishort cylinder 45 of large diameter containing a piston having a short piston rod WI 'aligned withfthe valve stem 44 and normally in contact therewith. In order-to operate the fp lo valve so as to admit steam into the jetting "element, pressure must be introduced into the Jqy ;a solenoid 5, Upon; energizing the, solenoid,

q {assuming that the-shutgoii, valve. [29:15 open, air is admitted to the, manifold 52, and to the pneumatic loch 11B." LIf it isxdesired that the jetting'be con,- tinllous; -throughout the ;cycle :of; operations {of each blowing unit-thersolenoid should remain cnergizedguntiltmisystem; as a whole has comf 'pleted. its cycle; :On'theQother. hand, if intermittentijetting for Leach-unites desired, the solenoid shouldsbeiperiodicall-y energized and de-energized.

Accordingly, there. iseprovided an interrupterrand timer apparatus 26 0f any usual or suitabletype, together with alcontrolswitch :2- 1 to 'permit'either constant or intermittent energization ofr-the sole:- noid,':depen'ding upon :the position of the'switch. will helieinaiter rhea-explained, each blowing unit isiprovidedmvith a yalvelthat :is 'openedaat ltheiend ofithe cycle for thatunit; Erom'these valves extend -pipe ;23, 2B, 3B, Bland 32 t0 an indexing manifold 34;- Consequentlyf whenever a; blowing unit has done itsWork, .air is admiilted from the airline leading thereto 'into the zcorre- I spondingpip'e which, in turn, leads'to the-linden- Tingimanifold; Each of '=the;pipes 28 to {32 has therein, adjacent to the 'manifold .34, a'mheck valve 35 to, prevent: air .from. flowing "back through thesetpipes frem'the indexing-unanifold. A pipe 36 extends from the manifold 34170 the pressurechamber in thepawl and'ratchetactu- Thi pipe contains a two-positi'oned" 'ator' 15!.- I valve 3! which, in one position pprevents air from reaching the pawl and ratchet actuating device while',inthe-other position,:such flow is permitted and the cam shaft-91s caused to make a step ahead whenever anyone; of the blower units cornple't'es its cycle; 7 e r r V I AS heretofore explained, thereii's nothing-new inthe blower units themselves. [As shown in Figs. ions 13', each unit comprises a hollow head '3 8- from one end ofwhich'protrudes :an-oscillatoi'y,

tubular iietting element 39. that"ex-tends into the cornbustion ehamber 'ofaboiler through a wall 2 50f a boiler setting; steam beingadmittedinto the lower "end. of the-head through apipe I that constitutes one of the branches of the main steam pipe F. Steam enters the head freely from the's team pipeybut is normally prevented from entering'the jetting-element by a valve 40 which fof these'lvalvesisithe reve'is'ing valv prises a rotatable lbody ineniber il and aj.stati on Y "the: pipes :51; and 5s; T Iheisecon'di fvaiv'e e err. valve betweenlth'elairpipefi and the reversing cylinder 25 behind the piston46. Assuming that the unit which has been illustrated :ingdetail is .theone markedhin thediagram, E henfitm 3.1eading'to-this head is-the 'Qnethat supplies-mi;

to this unit when :the propervalve atjthe maul- 1 fold-2 is opened;- a branchifirextendingbetween;

the cylinder 45 and the pipe, 3,, as shown in Figs.

10 and 1 1;. -Qonsequentl;y, 'whenever"..-the;pwal.vef corresponding; to thisunit isropen'edf themilct V 'yalvetin the headis,moveda:intolpositiorrito am:, ain steam' valv'evof ithateunit 'tanpen and 1 the I steam to flow into-the jettingelement. j t r 1 -Ilhejettingmlemenwsadapted, as'iscrm only done, 'to be-turnedfwhile' jettin k so thatitheiiets' 1 sweep thr ne-.11 asubst n i h nne; r In .thaifir' s. 'ticular. ty i unit under.*considerationg'tliei' jetting. element oscillates insteadsof turningiccut tinuously mone directiongandi a, -.wo1 lrh1g:nyicle= may therefore comprise -.a turning ymovementin" one, direction orga stroke in that; liiriwtionimd 2a; return st oke 1 11a IZ Q QHIMQE, stroke s m directiomflepending upon the); type of control h i. 9 ails i t etn nine m ans tenth: u el e sva e netn. hem e ves :novei it is suificient to say that the jetting element e s th e u a see casing 48 wiltmn e e ar'r dy t n of iv n ears-terminating-in a shaft w that extends to thegex ate i 9 th ea ing-r n cmi lme; wi hrthe presentinvention, this shaft is-drpi venrby'oreiorms part of -an -air rnotorwhieh isgbestshqwn in F155,:

l4 a vT s toron stsro far-su t ble rotor 5| arranged within a casing 52 andadgptegi 1 to vrevolve .in one direction crgthe, other, depend ing npen whether .air under rpressnre renters casing through -a;, pipe;5t .-or through a -pipe Thepipes ltand 55 aref'curvedso asto extend r hie se a ea wave t e tanner-ere? mntahd to thecpposite .side or,-,edge of the ihgflfr'ernithat at-which the air motor is ,lec gted an 'i e hl ds effiese, are; a e r-sm 9d 'a casting .55 which colitainsseveral valve ary; sleeve. or bushing 'fiills'urrounding the rotatiable member emanat ng u" A controljthe, admissionto and, eiihaus t of yalve; .Th'is shut .c-e-vaive cm ns'esa cylindrical within a boriejin thefcasting it a short istaiib below the 'reviers'iil'gfvalve'jthis'being the here, with 1 Whic'hfthe air plpgfi'fcommun'icates. "fFroniftifii'sj bore, which s tindicatedfat' SiLleaids eporeernifi fanend'dj which connects with alch'axnber open by the V ltable ipo rts reversing valve. The innerend of the plug 59 contains an L-shaped passage through which air-may flow from'the chamber or'bore 60 into 7 the port 61. Avalve Bllcooperates with that end of the passage '63 that opens out through theend face of the plug to. shutoff communication between the passage 63.and.the bore 60. The third valve in thecastingf58 is whatmay be termed an indexing valve, comprising a short plug member 65 rotatable in a suitable sleeveor bushing 66 ifitted into a bore in the casting above and inwardly. from the reversing valve. A passage 61, as best shown i nfli'i'g. '18,leads from'the bore 60 to a point adjacent to the sleeve or bushing 66. There is another passage 68 leading from the exterior of the casting 56 tothe peripherypf the sleeve or bushingfofi and, fixed to the casting and communicating with this passage is a pipe which correspondstothe indexinglpipe 28 'of the diagram. The plug member 65 contains a'cham ber 69 which'op'ens out through the periphery of the plug at three points separated angularly with respect to each other. The sleeve member 66 of the indexing valve contains ports 10 and TH communicating wi ththe'passages 61 and E8, re -I f" spectively. The parts are so'proportioned' that the-passage in theplug may connect thepipe 221' to the passage 61 in either of two positionswhile interrupting such communication in aninterine diate or neutral position. This, as will hereaftrbe'understood, is for the purpose of permitting air to enter the pipe 28 whenever the'indexing valve is rocked to either limit of its movement and to shut off such supply when the valve occupies a central neutral position such as illustrated in Fig. 18. I H The 'rever'singvalve, as heretofore s'tated,:mu'st permit air to enterand be exhausted from either i of, the two pipes 54 and 55. Accordingly, the sleeve memberi is provided with four ports13; T l, wand 75.] The port 13 communicates With a chamber TI in the casting, with which chamber the pipe 5Q communicates. The port 14 opens into a chamber 18in the casting, which chamber is in communication with the pipe 55. Theport 75 opens into the chambBrBZ. The port 16 opens into a chamber l9 which, in turn,"opens into the interior of the crank case through a passage 80; this being the exhaust passage. It will be seen that when the valve member 51 voccupies the p'osi tion illustrated in Fig. 18, air may fiowthrough the reversing valve and into the pipe 55 whereas the pipe 54 may exhaust through the reversing valve and thechamber or passage 19; and, con sequently, if the shut ofi valve '64 is open, air can flow into'the motor for the purpose of turning it in one direction. The rection of the re--; versing valve in Fig. 18is takenfat about the middle of the valve device, namely on'about" lines 211 M of'Fig. 16,"so that there is correspondence between Fig. 18, and Fig. 24 It will be seen that the sleeve or bushing 58 has four additional ports; namely diametrically opposed ports SI. and; 82

' toward the left/hand end as it appears in Fig; 16

and registering Withj'the chamber .11 and 52, re spectively, together with a; second set of dia metrically opposed ports 84. and; 85 toward the righthand end of the valve device asi a pears in i Fig. 16 and registering respectively with the chambers 73 and 19 ';The movable member of, the valve is, in efiect, a cylindrical block theends of which are left intact. and whichis divided into three non-communicating. or separate .sec-

' tions each of which is adapted to cooperat with one of the groups of-ports in'the surrounding sleeve.

. In Figs. 23, 24, 25 are illustrated the conditions "to 16, iseifective. .Whenthe valve'is shifted through a fairly small angle, to bring about the conditions illustrated in Figs. 20,- 21 anda22, it will be seen that the pipe '55exhausts through the chamber 18,.the ports 84 and .85. andfthe chamber 19, while the. pipe 54 is receiving. air from the chambenBZ through the ports 82 and 8| and the c hamber ll; the two end sectionsof the valve being now active and the central secttion being; idleibecause the central; section .of the movable member of the valve, as indicated in Fig, 21, closes both the ports l5and l3.and

.forms' an imperforate barrierzbetween the ports '14 andflBQ a The purpose of the shut'ofi valve e l inathe blowing unit head 'is .to insure that therezwill be steam in the jetting element beforethe motor begins to' operate; thereby ;insuring that the jetting element will be effective -throughout its entire sweep. .We therefore; provide means for normally holding this valve closed, .but causing it to open whenever there is sufficient pressure within the tubular jettingelementfor that purpose. To this end the stem 86 associated with the valve 64 eXtends-outj' through a face' of the casting and into a casing 81 fastenedx'to the casting. The stem terminates in alon'gbylindrk cal part 88 of much larger diametertthan the stem. A spring 89 between the innerend of the enlarged portion':88 andthe plug tendsbohstant ly todraw the valve against'its seat. Extending over the member 88 is arbellows-like 1 sheathing 90 which constitutes a flexible inner casing.-

Upon admitting steam into-the casing}?! on the outside of the flexible inner casing, thelatter collapses sufiiciently to cause the plunger-like part 83 to be forced in a valve ope'ning direction against the resistance of the spring 99. Steam is supplied for this purpose throughapipe 9| which, as best shown in'Figs. 1i and 13, connects with that part ofthe blowing unit head a which surrounds the inner end of the tubular jetting element-39 and the space within which receives steam only when the valve 40 is open. It willtherefore be seen that since the valve 40 opens almost immediately upon turning air into the pipe 3, there needbe no delay in the starting of the motorafter the pressure 'in the jetting element has been built up sufiiciently to insure adequate jets will be discharged.

' It will nowbe understood that suitable means being provided to shift the reversing valve, the admission of air into the airlineleading to the .unit. causes the steam to "be turned into the tubular jetting element and, thereafter, air to be delivered to the motor to cause the jetting element to.;be' turned in one direction until the reversingivalve is again. operated; and, if the indexing. valve is opened at the end of a swinging movement. of the jetting element,{'air is ad blowing unit which has just completed its cycle,

and air isthen-delivered to the next unit in the erum) or series, Wheneverthe cycle o'f any unit is completed, the air leaks out of the eylm m iiormmg part of the d'evi'ce for opening the milotwailve in the head; =an'd thereupon the ma ln 41y the ijettin'g elementythis elemerit rm'mg thereon andedjlustakile angula'r ly thereof rele ti-vely -to each other and to the element a pair o'f :htttle blociks lorflu'gs 93 and 9 1, In the'l'paith-of "these legs is a finger 95 projeeting' radiaillyfrom emember :se 'pivotally mounted {on the gear casing and having-"thereon dittm'etrioally opposite from-one end f "the reversing valve and coaxial with the latter. Between the part 58 mind the movable member of the reversing valve is a suite able :snap action .rdev' iee including a hennedt'ing spring 99 whereby :the locking of the member 9.6; through. :aksmlaill angle 1 causes the reversing h 'setgeze V w v as mammal m Fig; l i iit enea'ges 50th br ttle 1 fingers ZBS emEI ms, cauem the reversing-wh te be shifted and thugehemethe me er'w dztvefthe V jetting element threugh'a. 're'tfzrh stroke proviae'd eteemvalve in that head e'los'es and m: mere 5 the eir is not-s'huvdfi, end tum'in the moyeme 1 steam is d'elwere'd to the jettin'g element iin that member "6f the irrdeaing 'valve out eit its netham'ftmntil the camshaft isagainefiflsd t epen trail -posit ion so es' to admit e'ir intetheindesdng the correspoxidlng air vwlve. I line "28. As will herein-after 'beexpldinefl;

. :ihown im mgsmm 'and 16',' flhe reversing V eam -shetft formo'ritrolhng the 'ailm'isslon; r er; V 7 walveaniirthei'indexmg velv'e 'alre bofih operated to'th'e individual un'itsFisoperatedsoquilly after- Y e the admission of eirihto the indexing man-field,

to rest we then must'staitrrom"thait-pesltloh.

' to t'ravl even every short distance .on a' etum strokeafter "the reversing "valve has been shifted at 'en'e limit of the sweep or; the jettmg'j element, the QugWhiehbrougHtebotrt' theshfftm e off the rever ing-verve end the indexing valve I moves *far enough 'a-way from the fingers :95 v and we jtobe'rmit, the i dexin valve member estefe returned "to its neutral "or; idle position by its 7 spring I'Bl. Therefore; tn the system'-'as,fjlms+ treted, e'cyc1e'of opeyeitions of e smgle'unltfcom sists simply of "a tota'raugmef movement o'fits e l jettingelement equaljtoa rul'lflsw'eepof the letter I valve to snap" quickly {from one extreme position to the other.. Assuming that thettibu lar 'je'tting element has been turning in the ='clookwise direction, .as viewed .in Fig. '14, it will be seen that;

the lug '94 is .just coming into engagement with the finger :95, s'o that thepar'ts wand 98 will be turned. Since the,-shifting of {the reversing valveais substantiallyinstantaneous, "the motor will promptly'rbe reversed-Sand the jetting'ele mentiwill begin to itumlimthe eourrter-eloekwise directiohflprovided, thatfith'e motor is receiving avjsupply o f ;a;i r.f Ifjno means were provided to shut 'off the air," the motor would simply run in themeverse fd ireetioh until the-"lug QB 're'a'hed the finger 95, whereupon the :re-vers'in'g vlve" would -berturned back to its starting position and the cycle :wo'uld then-be vvepe'etek l lnle'firrite'ly. The, length of "the cycleLo-f an individual un'i't is axis of the latter. Howevegith member $5 is lec-se on this'valve Vwhichxaets simply aisle-hu lies behind the finger 2'5 sagas yto heengaged ;simultaneously with the latter by either the-lug 93- or the; lug 99 mounted ;on the r tubula r jetting the 'cam shaift e also extending acrossthe-ihtez ror" afialptefiI to be 'trippedighy zanfexi ensi l elme H be'tvveen its two extreme posi tionsh-lvwill also be seen that "after the cyele h'as been completed; the series of operetticms with respect 'tothat pair-V e p'eaitet'l the next tithe that thefcorresponding 'aiir j vel've'aztthemazm air-mani'fol'dis opened.

m1 at the controlling devices, except Tt'hhs'ein er while the two melfiifo'lds are errangedwitmn the casing, gone'atthe'top 'ahd the other 'at the'bbttom;

' Control-led by the indexing valve in the head. m i e v 'm -"m m? I I v id's-shown inIFig. 11, the rota'ta'ble men! 'r 9 r f .l v.; ll

ef the indexing- 'val-ve projects beyena the re i 7 W111 e i fi mh 'e t v r PF IF -FI'T of the castng es, where :it is surroundedlhy '9, 7 1 jgm aft mq im sfit m fi WVicupeshamed-member :mt fixed th'ePe t'e-in vfrom whlc nose any suitable immanent Within the chamber er 5 i v a i n n ftf fi h wD- aped member is :a torsien soflngm'l, a Thefile t fl ee et i t ends of which are mossd zggween fife vrce a'rebestsh0wn nrF l g s 'l to 9,1ncl1rs1ve Re- I casossed enels are two {@5183 and 1173; the first p e r t q 'i rt me v p' fn hs being -flt fmarynasnd projecting f1 om-'the casfiing -3 v iw gm We??? 9* Ye 399" t e other is carried by :the member m. h 'cfitm i fi fi f Y? 4?; elm This'spri g tendsc-mstehtly 'iib hdld the member 7 rcyltnder plstop, "'1 prqylded mm 65 gih theangula'r :pesition illustratedin Fig; 11;, m 1' .Q'W EJE K Q FhFP 'g WQ Q? namely the 'neutmhposmen, wmle-permittmg "it we F h Z Y l 39m? to be turned in either direction so aste brim 31m "T 2 t s n n me ia e We h r f its two. working "positxenst ine i w r efi z imw e I memhe es t-h t tthe neversing "valve is arm 1 l4 ahd at theirhpper ends to'letterelm car ied by the va-lweumember fiiiohtwa-l diy f-r'om i fi'fi i -Ph i i he mber we; being hel'dwfhom dropping off by t he rddle' or the qross emnwl-t i oneehdfot means of e belt-or screw i115 extehdingthmugth v '7".f w ii ee -""1 P thejl w rti-ctfiend-into the -va1ve111embe r :etthe 65 operate -W h w "fixed m cem=-sha fit; forthe'ptirpose oi thming' the V step by stepf'I n the arrangement showhyjthe member "l l'j "comprises two disk-like parts SW! both emmedted-to a"single; more 'or'l'ess'mdlefl r e r-m; the retehe't wheel flyihg between the'two I disk ike par ts; fi'Qne o'f the members Jflflhdwe "peripheral netoh 1-2 which, when theplston 1 7 is alt theillovwa'r end o'f its strokepis engaiged byfa Y likejshell 213 whenairiunderpressuiieiis admitted into the latterjf Normally the member I23 is con:- tracted, as indicated .in Figs. 6 and 7, so that after thepi'ston' 'rodfhas' been broughtinto the position indicated'in Fig. 7'," a i cannot ove up again-untilthepneumaticlock is released. In

the diagram, Fig. 1, the pneumatic lock [8 corre spondsto thepawl I 22 and the pawl actuator l 23,-

and it is seen that airis supplied to the ibellowslike element througha small pipe I25 connected to the'main airline near the inlet end of themain manifold}. l 3 v i 'Whenair is admitted into the main manifold, the air lock for the cam shaft, justdescribed, is released so that, after-the-first blowing unit has completed its cycle, andair is admitted into the 5 team 13s by mango; w ich it amt turned.

. The pressure gauges 8, as well as gauges l showing the pressure of V the air supply and the steam supply may also be locatedjon" the frontof th'epanel as arethe indexing pointer [4 and the handle for the automatic indexing valve 31'; The timing :devices 26 andjthe controlling switch 21, .for energizihgfthe valve actuating solenoid 2 5 and determining whether it shall, re: maincontinuously energiz'edor be alternately energiaed and de-energized, are also'preferably placed onthefront of the panel. v 'It'will thus be seen that wejmake' it possible for an attendant to operate any .one' of a series ofblowing units with which aboileris equipped;

. and permit it to run for anydesired length of cylinder l lll' from the indexing manifold, "the .In order to insure prompt turning of the cam shaft after the indexing valve in a unit has been opened, I provide the connection between the pipe 36 and the cylinder H0 with a small vent 126, as shown in Fig. 8. This vent is small enough not to interfere with the building up ofthe necessary pressure to force the piston down time; or operate the entire group, one after another; with each tubular blowing element'movin'g'through any desired angular distance; 'or bring about the operation in automatic succession of the entire series, each unit performing according'to a predetermined cycle. In the latter instance, a warning will be given through the blowing. of a'whistle', so that the attendant may shut oil thesu'pply of air and steamer other fluids whichmay-be employed. "It will further be seen that the jetting'performed during a 'sin-' gle operating cycle of each unit may be continuous or intermittent, without requiring the attendant to do anything more than simply to shift the controlling switch for the solenoid valve in the airline'into its continuous or its intermittent position. It will also be seen that the and stretch the springs H5, while insuring di- I rect escape of air from the. cylinder as soon as the inflow has stopped.

The cam shaft and the valves actuated thereby are best shown in Figs; 3 to 5. It will be seen that in each of the pipes 3 to 5 and it there is a valve casing I21. Within each of these casings is a poppet valve I28 provided with a horizontal stem I29 that extends forwardly through the front side of the casing toward the cam shaft; Surrounding each of the valve stems, within a socket extending inwardly through the front face of the valve casing is a compression spring I 30 that tends constantly to hold'the valve closed.

On the cam shaft are fixed a series of disks 13],

one disk directly in front of each valve stem. Each disk has thereon a peripheral cam lug I32 which, in a given angular position of the cam shaft, when the latter is turned in the clockwise direction, as viewed in Figs. 4 and 5, forces the valve stem inwardly and causes the valve to open. The cam lugs are distributed spirally around the shaft so that only one valve at a time can be open.

It may be that the construction of the various tubular jetting elements cannot be moved until they have been supplied with cleaning fluid, thereby insuring that the entire zone corresponding to the angular distance through which a cleaning element has turned will have been properly cleaned. Should the supply of air fail, the controlling cam shaft will be locked from being automatically turned from one position to the next until air pressure is again restored, for the reason that theair lock acts immediately upon failure in the air pressure of the system. Since it is not likely that all of the blowing units will be exactly alike, and, since it may be desirable to operate some units more rapidly than others, even though they should be alike, the means for regulating the flow of air to each unit, after it, has past the shut off valves, is an important feature, as it permits each blowing unit to be operated in a manner that will enable it best to perform its intendedfunctions.

While we have illustrated and described with particularity only a single preferred form of our invention, we do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which comewithin the definitions heads in a series of blower units makes it inadvisable to supply the energizing air thereto at the same pressure and in the same volume. Ac-

cordingly, means are provided to ,regulate thefiow of air through each of the airlines leading to the blowing units, in addition to the valves that simply serve as shut off valves. rangement shown, there is screwed through the front wall of each of the casings I21, above the shut off valve in the latter, a stem I34 having at Inthe are its inner end a plug E35 which may be caused to obstruct the passage I35 in the casing'to any desired extent. A rod'l31 is connected to each of these devices, and it extends to the front of the panel where it is provided with a finger piece or claims,

of our invention constituting the appended We claim: l. The combination with a plurality of soot blowers each having .an oscillatory blowing element and a fluid pressure motor for moving the element, of a system for' supplying fluid under pressure .to the motors including a motor-revers ing valve adjacent to each motor and individual shut-off valves, a. cam shaft for operating said 1 shut-off valves in succession during each revolution of the shaft, and means for causing each reversing valve to beshifted and the cam shaft to be turned through a predetermined step at each limit of movement of, the blowing element corresponding to that reversing valve.

the ether -,Th co b n tmn with. a, plurality oi, spot i luwers -e ach having, an oscillatomhlnwing inent; alfluidt pressurp. 'motoltlamalyefio admit for. h iiatbne aid .vame, ,Qi a, system im s upply ins; flultdi und'e: "mar sure ,tmthe ,matbrs. andgtq' aid xcnntrollens including. a.v shutrofli, valve and amQm -revexaing, va ve .fsm each. blower, .a matter Qntmllen for emanating, shun-0m va.13/le in sucmasinn. and meumsv 110i. Qausing. the,.'cm;r1e1-.

sp'smding, reversing \ne.t13z... 1:nv be 'shiftgdz andl tfi master controller tabemmei far npugh mop; exam he; shutoff valye -associated with blag ngxt sucza s ding hlgwex;e emenmtgeachtlimitqf mpve mental. each blowrelementi- 7 .3;,"I;nt cnmbinatipn with at plurality oisnot bmvuseaqhhaving a ,mavablasblpwing element,, a 151mm pnesaure. motqrt; 'a' valve ion contmllingt he admiasinn. of cleaning flu tt to the blowing ale. mam and. at fluid 'pnessum actuate: for saidvalxei; of; a shut-.011 valwehat eachtmoton, l i

measure actuattqns im: the aforesaid ShllbrOfi aJYQS., means, to; admit. fluid, fmmsaidblowing filaments? to, the, lastrmentiomch actuators.- Mom: 131% carxesnonding. blowing elements: together.

withtatsystemtincmding, at sec ndhut-0;? vaiw fun each, blower, ionsugplyinmfluid uimen lamessureflto eaqh. of. the-. firsfl-mentipqeq ashqt qfi yalves, 3/ master contno11er..movab1e step by; step for operating said sgcond. shut-ofi valyes in su ev V cessionfand means; tovv shiftlthe mastercgnr' trollelt through-Que stepwhgnevgrany one'oftthg' f .1 i Y blowing. elgments reaches, ar'jgredetermined po,s t-

tion. t

bl owexsiaach,having ggmovableblowing element, v fiui .pm qx;,ava ve mn controlling thn admis ion of. clealj'lr .fluidg to .the blpwingjiele ment, and. a fluid pressure actuator for said-yaiyeg, at: a fluid pressure" distnibuting: ystem-includin ar: pigs; leading: 0 eash, motor and; tcr thje' com-g: spending afltuatoma-shutroftvvarlveximeaghsoirsaitt; Z pipes,.a.contnp1len movabla-step by-rstep tmopemhe said shut-off valv e'sg 1m guccegsipn; a; fluid measure actuator for moving said cqrmnollen thno'ugix-cma S ep.- whenever:thatiactuatonr is' energized; an. 1m:

dexiri z valvee adiacent: to. each-i snot. blower to ad'- mit; fluid; to the; last mentiangm agtnatmfi. and. a past, movable with each-,blpmenrelementttn,enaflflq theadjacent indexing; valve opem the samev when} that element reachesta nmdetenmined Sit/ion" I v t "1 1 DE; LQS

ERED:Q...AREYL.

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