US1776547A - Pipe-extracting apparatus - Google Patents

Description

Sept- 3, 1930. F. e. CARRINGTON 1,776,547

PIPE EXTRACTING APPARATUS Filed July6, 192'? 2 Sheets-Sheet l "wmvgg g u NX-MQMQMM gwwnkw Sept. 23, 1930. F. G. CARRINGTON PIPE EXTRAGTING APPARATUS 2 Sheets-Shae! 2 Filed July 6, 1927 gwuento'a r76." Came/warm l SIII'II [III/VIAIs 4 6* Patent ed 1930 I rim-iii": G. CARRINGTOILUF'ANNISTON, ALABAMA, ASSIGNOR TO FERRIC ENGINEER- ING oo rANY. or NNIsroN, ALABAMA, A conroRA'rIoN or DELAWARE 'fPIPE-EXTRAC'I'ING APr RAT'Us relates thejcentrifugal feasting of pipepa-nd more particularly refers man, apparatus'j f from a rotating mold.

: In a centrifugal castingprocess. molten ;;metal is poured in rotatingmolds and'there A H or extracting a pipe I maintained until it has sufficiently hardened invention is adapted folyus'e withany type.

of core.

for removal. In orderto prevent an efitlux of the liquid metal from' the ends of the molds, cores are insert'ed in the niolds. The yeast pipes are usually extracted from the fmoldsbygripping:and pulling the cores,f thu 's I preventing abrasion of the recently cast pipe. A ,With icertaintypes of cores, however,

the pulling device grips the pipe itself.

U ,'Ov er; a castingoperation"there a substantial increase in theheat of the moldto A .ijThe 'nece-ssity, forcontinuous rotation is v f h foreappa ent; While it is true that some of theldevicesheretofore used for pullinga pipe from a mold have been capable such an extentj thatartificial cooling ,is

continuous, an unevencircumferential cooling points on the circumference.

of operationflwhile the mold rotates, they in .have, failed eflioiency. and satisfaction. v fThe'principal disadvantage has been their I inability to operate-.wh'enw the mold fbecomes wa n d; E n. whel f oti e l 5 e mo :vislcontinuous;there-nevertheless develops a! V v 'slight 1 warpage which; pauses a gyration of ,theendof a moldi'when rotating. And

I Qthis gyrationincreases along the center line I, projected ,from theend of the mold The, '.1nore .ja pipe iswithdrawn from-a Imold ftherrifofmthe greater will be its gyration.

- The ,pipe pullers "heretofore. used. have 1 failed to provide: for this ,misali'gnment of the axes; of the mold and the puller. I

the former devices is one of therewithtractive means; I j Inforder to more fully comprehend the scope of my invention, but in no Way limit- 7 .in'g myself to the details" of construction necessary. "If-rotation of the mold is not in the direction of the arrows.

inpplicationfiled J'ulye,1927. seriai mjzoasse.

, To overcome the difliculties inh-e'ring in 4 I the objects of this invention.

Another object is to provide a pipe extractmgdevice compact and economical of construction and operation.

[Yet another object is to provide a pipe extracting device capable of operation when Inisaligned with a mold.

And a still further object is to provide a device for extracting a'pipe from a Warped mold; 1 p

1 To accomplishthe above objects, and other important advantages as will appear more fullyv herein, invention comprises in gen erallgripping means and flexibly connected therein set forth, reference is made to the accompanying drawings in which similar device.

Flgure numerals indicate the'same parts of the Fig. .5 is a longitudinal sectional View 1 is "a side elevational view of the device Just before gripp ng a head core;

along the-line 55 of Fig. 2 looking in the direction ofthe arrows;

."Fig 6"is a front plan view of the ap'pa- 'ratus; I

Fig. 7 :is cross sectional view of the .device along the line 7-97 of Fig. 2, looking Referring more particularly to Fig. 1, a

gripping device 1 isshown. This device com prises a head member 2 q'irov ded with a cen- .trally positioned frusto-conical aperture 3,

asis more clearly set forthlin Fig. 5. The

,base of the'cone is in the-rear of the head. inember,--as at hand" converges towardthe front of. the member. The front portion of the aperture is provided with a concave seat 5" which is. adaptedto receive a partially in spherical set nut 6. The set not 6 isthreaded one shaft 8. When aipuli is exerted on the shaft, theset nut and seat 5 act, in effect, as

8,;hut-its movement; to is limitedby AsshownIih-Fig. 6, the head member Qx'is bifurcated as at 12 and 13. Between thearms l tand 15, provided by the bifurcation at '12; there is pivotally mounted-a dog 16; -An- .otherjdog 17 is pivotally mounted between irmslSahd 19 of thebifurcatioIiB. r 1

In Figures 1' to 3, there is shovvnin moret 1 to the flange 36. i

detail the shape of the dogs. These'dogs are adapted to: contact'w'vi'tll a f va'112lf of afrusto conical aperture 22 ina head core 23,1 v, I have shown the dogsgrippingfa he'agd core they maybe clamped on the pipe itself or anend ring core may be used. It is to he noted that the Wallet the aperture converges toardtheoutside, 0r faceQ i. of the core; This shape of the aperture minimizes the pos- Sibihtf {Of the apparatus slipping frohijthe jeore when the dogs; are in o peratiye {position and 'a'pull' 'is exerted; i

Referring to, 6, there'are pivotallyatt'a'hed to either sidejotthe -do'g 16jb'y'a belt or other si itablei'mea'ris; arms 26 and 27:. 7

"and separated there rem t Si1ni1;ar arms 28: and 29 are attached to the pivots, On theoppositeside of; the head member apiate 35, similar inzfall respects: to plate 82; mounted, and'held bythejother d gi l 'lby a boltBlior other appropriate 'piv- 1 g means. 'i'It vvilllbe observed" that reci'p Location of thearihsr'esLdts irioscillatiodoff I wwasher tififThe opposite their n dog-'16; and a bolt 8 L onfwhich the do'g 17 ehdsof thehoits 33' andfie}; Itisof' course:

understood thatother appropriate means'may "bef'e'n ployed. for seciiring thepiates' and '35 v f'lto'thefhead"member.2; I H y Thep l'ates 32 and 35 extend to therear of the hea d member 2, and at the opposite. ei' 'd terminate in a fiang'e36. Asshown more per:

c ticularly in Fig Z the flange 36, is ofa disk j ment 0,1 the" s l In" thefplate ttogj-ihation provided with a central aperture 37'; The shaft 8 {pro ects through the I aperto permi t *mai a1 moveshdecrossheads 39 and 41, referring to Fig.

j Themember 39' isprovided With'fianges by means ofboltse l iliiain at the rearot'the apertures I L,

" lever 62; "A hot e Size ofthe'ii aaitt"therein,iresultiiig froni they, ev/ingottheshattgin the seathr l V i 32 there is a rectangular cut Y i awayport1on385ahd'in thenlate'fifia r (in 7 "notech 42' and 43wvhich project beyond the aper-Q ture ahd'resti upon the outside of theplate 32, Cross head guides l4 and 415 are m'0unt-- edoir the p1ate3 2 boltsor nuts- L6, or

other'suitahle means. The cross head guides T are provided wlth flanges 47 Fwh1choverlap the flanges 4:2 and 43 011 the cross head and prevent all except as'liding'movement of the V V crosshead. The'crosshead 4L1has'fianges4c8 V and 49 similar to. those oirthe'cross' head 39. 7 Guides 51 and 52," provided with flanges 53,

Similar r i' Qunted on the Qiate At the front of each or hea d 'there'is a there is a tendency ,for'the'cr i-feir guides res'tilts iii" an the dogs;arerstrhstantialtyfiat updn; thepde v c vice.

' T Referrihg tofF-igjsfi'' and 7,"ther'e" is shown- V e'ot the cross head 39', r V

"washer fi l," aft *theleyer mounted on the insid 63- securely fast 7 I A lever fi ti sa iotintedfo to the-across heat the crossfhead'dl'l heads 'aref pa rtia lly itached to theleverM by rhea-11s of a bolt, The

described by hioit 72 as q teatime: :1, g '1 rrlri g to' Figure t t" the h teiei e e projection 76; The

s na e-ans of a boittfi and 3 softhe leVersGQ alidfi j 7 n1 8 1 ai gtd arly f disposed? to j drin's I and 7S and ifi ottnte'd onc the'midd le ofthe' removal from that ijositioil; to returnthereto; Itfwihfalso beeb maflm maovemeneer the cross headsein' v oscillation of the iabou't'theii' respective crosshea-d is'moved' to the roiihded,jas' fifiini'orde "to "reduce the fr ction betw en the i ever an d 1105 i "the core face *link 69 is'joinedby'meahs of ho1t'72'toon arm 7 a three-armed-hell crank. 1 7 The plate 32 provided with a down :fl vardiy projecting'lportiori-i i1i which; an

arcuat'e siot'Z-B is cat, is provided oh the plat c 7. "1 1 arcuate'siot; These siotscontor'rn't'o'the arcs imam crank,*e xtends' below' the bottom ofthe'pro jections'74 andi75 Another arm 82, also mounted on the" middle of the crank 79, pro- 'ject'supwardly, and is attached to'a spring 'nects the plates32' and-35. The plate 84 also serves as '9 There-isshown in-Figures Q'and 3 an arm :85 which isin-the planebf' the arni81, the

- purpose thereofabeing more fully described hereinafter. 1

awed that theplates '32 an 35 are bent, asa't 86, and'that the arms 26, 27, 28land 29 are bent, as at'87. Thesemen1bers' 'are be'nt in or'der top'ermit the shaft 8 to swingabout yithe-seatjh, and by this arrangement there is noobstr'uction to such swing except the size of the aperture 37in the flange 36. The shaft therefore-maypull the pipe from the mold eventhoughthereflis agyration'of the end of "themol'd'. i

There attached to the end of the shaft,

9 asshownin' Fig.5, a rotatable joint. This "joint comprises a casing "88; in which there IS a cavity 89. 'FIXQCl iirone end of the cavity is a disk 9liprovided with a ball race for ball bearings 92." Opposite t he disk 91 is an- I duefother'disk 93,"which revolves and is also provided-With 'aball race." A flanged'disk 94 is mounted on theshaftBBaThe casing 88' is; drummed on its interior a nd is adapted to re-v .ceive a lniember 95 inwhicha fiexibleftractivc "means Ohjsti'ch. asa cable, ropeor chain is secured. Thereis shown al'cable which is inserted and spreath'after which lead is poured to prevent the cablefrorn being pulled from themember 95; lVith this joint the shaft 8 may revolve while thecable, or otherflexiblo means,. rema1ns stat1onary.' q 1 s j ,A suitable gr p (notfshown) s provided "sothatan operatormaylinsertthe'devicewhile Ithec reis rotating. --A "sleeveinight rotat- I ably surround the shaftf8, which i would re- ,main stationary while'theshaft;and apparatus isrevolving. I v y, 1 dep ctsfthe apparatusl ust prior to insertion-inthe core. 1 I- shall describe the 1 edemembers, it'beingunderstood that cross head .41 operatesfin exactly the same way.-

' The arm 73 ;isloWereduntil the bolt 72 rests auses the'1ev re2 ,to piv'o't' at its point of at tachment to the link; 69. Inasmuch as the f F bolt 72 is below the directionof'the forceap-- '83' whichis' secured'to-a' plate 84 which con-- a support member forth'e' plates 32 t V lle/ration ofbmy ci'osshea d 39 and its relate the I bottoin ofthe slot 75. The bell. crank 'will'be';helcl i'nthis position by reason of the v pull exerted bylthespring 83.";"The" springs plied, the'link' 69 serves a rigid pivot. This 'i-neans that the upper portion of the lever 62 is moved forward, and in so doing the cross' score or pipe, the apparatus is ready to pull the pipe from the mold. It will be observed 1 that the device grips the-core or pipe more,

, r firmly when a pull is exerted. If the inoldis l-teferr-ing' to Figjures 4; and 5, it is to beof the axially stationary type, thecable l is Wound up on a drum, or other means areemployed to exert a pull upon it. If the'mold, "moves longitudinally, the end of the cable may be securely fastened and themold with drawn from it. With a long cable and rod the effects of the molds gyration is'reduced,

and it is therefore desirable to have a cable and rod of considerable lengthl; 1

from the mold, it is supported by suitable means. As the core is withdrawn, the arm 81 strikes the member 85. Thisrevolves the crank, which inturn raises the arm 73; When thearm 73 passes above the horizontal, the

pivot arrangement collapses and'the springs 58 return the cross head 39 to the rear of the aperture. The dogs and bell crank-arrangeinent are then in the position shown in Fig. 3 and the apparatus may bewithdrawn from the core. r

It will be seen from the foregoingthat there need be'no cessation in the inoldsr'otation in order to'reinove the casting by my.

invention. The pulling device may be inserted, clamped to thepipe or core, and the pipe extracted from the mold, all While the mold is'rotating at its ordinary, or a re duced, speed.

It Willalso be seen that my 'im'entio'n' .operates eflicientlyeven'with a warped mold. Regardless of the gyration of the mold, the rod 8 and the cable remain taut and continue to exert the same pull on thehead inember'Q. As above pointed out, the shaft swings about the seat 5 and does not contact with any of 5 i j the members of theapparatus except "the.

flange 36. Although a ion particular embodiment of 'my invention has-been set forthinthe foregoing specification and in the appended drawings in considerabledetail,itis to be understood 5 that many "alterations" and modifications of structure may be made therein; Any such changes, it is to be undeihtood,however, are

"to be limited only by the scope of the appended claims.

I claim rotating mold comprising ahead member 1. A device'for extracting apipe from a engaging members pivoted on the-head 1nen1- ber, resilient means on-thebody member to H maintain the engaging members normally in 1 inoperativeiposition, a lever carriedby the bo'dy member and connected with therebody portion mounted on saidhead'member,

si lient means to throw the engaging members intooperative.position'and means associated for sai'd leverfioatingly carried by said body :member and means carried by the ireeend'; o'frs'aid lev'erfor engaginga mold for actnat-L y withithe lever to return said lever to inop-- era't veposltion."

said slot v saidybody;member, llIlliS connecting sa d pivoted to said crosshead, aviloating fulcrum ing'the 'crosshead.

- 35A device vfor extracting pipe froma roi' tating mold comprising a body, member, --having a slot thereim a crosshead slidable in said-slot, pipe-gripp ngmeans carried by said bodynnember, links connecting said a crosshead 7 I 7 r 7 110011 engagement-between theffree' end of gripping means With said crosshead,- a bell,

crank carried by said body 'm en'iber a link connected withonea'rm of the bell. crank a lever pivoted to the free endflo'f said-link, "said lever. having one: end pivoted tothe andjadapted to actuate the same lwsaid lever and the mold. "1 1-;

@connected with-one arm of the bell cranlg;

a lever pivotedto the'free end'of said link, said 'leverrhaving one end pivoted to the crosshead; and adapted-to actuate thef'snme upon engagement betweenzthedree endfof i 44A deviee forextracting pipe from are tating vmold comprising a: body member having aslotitherfein, a crosshea'd slidable in fsaidf slot, pipe-gripping ineans; carried bylinks connecting said gripping means Withsaid crosshead,. a bell said body member,

- crank carried by. said body member a link {said lever and Ithefmold, and means for shitting the bell crank to {release the gripping "means. a i

-tion, gripping meanscc rried therebjga crosshead slidablein saidbody, a leve pivoted to J said .crofsshead' 6.'A pip'efpull 1'comprising'ab'ody per,

- sa d lever adapted 51' A i ef aui combrisingiag body 1 means connecting the griphead, the freeend opirv means and c A tion, gripping means carried thereby; a cross, f

head slidablein said body, means connecting the l gripping means and .crosshead, aflever L pivoted to the fcrosshead, the free endo'f saidv lever adapted to} cooperate With 7 the mold togg m n en ting the: ev rf ith' h l 'moldalloffs'a d g to CQOPGTZKQ,'wltll tlle' 9 mold and toggle 'meansiconnecting the fleveirf J-Wi h djv po by a] ball nidisocket join-t; 'r

toggle means.

.body p0rtion,;and means for actnatingjthe V '7. A pipe p'ulling [device comprising 'a body member, x.pipe engaging elements mounted on said member flexible; means carriedgby the body member i sa d 'means' being cooperatively associated with thepipe engaging elements and saidbody member for 1' tron.

adapted to'fbe inserted. in thecasti g, casting engaging elements 'carried bv the member; I V resilient means carried ,by 'theg body Vmember' gaging elements, operable npon engag ngthe mold for moving the engaging elements into r i resiliently urging said pipe engaging-ele' j -1ne'nt' into "inoperative" position and means 'carriedbyithe body memberfor moving the ipe engaging elements into operative ;,posi i 8. Adevice for[removing c astingstfrom rotary molds; compris ng a .body memjber operative position. 1 Y 1 v v r I g t g 9. A pipe pulling device eomprising a body member, pipe engagingelements mounted onsaid member, flexiblelmeanscar ried bythe body membensaid means being cooperatively associated With the pipe'en- I r V a e5 res l ently a urging said rpipeiengagingfele HlQIifQiIliZQ- inoperative- Iposition, means car? f ried by the body member forimovingfthe i gaging elements and said body memberffor pipe engaging elements into operative positionan il tractive means directly and flexibly connected to the-body portion;

l0. A device forfextracting' plpe -fromia rotating moldfcomprising a body m'ember adapted: to be inserted vvithin the; pipes, 'gIPipPIIIg-IHGQJLSJQH said body II1111l381,'1I18211lS[1 5 thelhgripp ngmeans andjres llen-t, means for v w mesfi ippi mea i i p rat v pos tlon hen the pipe is removed iromthe; mold, allot sald'tmeans beingoooperatively carried by the member for actuatii associated on 'the ebody member.

'll' A device for extractlng lbipe froin af rotating more, comprisingfaY body member adapted to -be inserted Within the,pipesi rip- I ping meanson said bo'dy member, means'cairied'by the bodyfmember'ior"actuating-the- Y gripping means andre'silien-t 'm ansfor re turning the. gripping means t operative Sitlonixfvhentheipipeais remo-v cm the means means. connected "with the extracting device V 12'. A device for extracting pipe compris' ing a member adaptedjto be inserted" in'the, vpl'pe, means carried by the'member for, gripping the pipe, a socket: portion. of a ball and socket joint monntedonisaidmember, ab lla i or o,

'13. A pipe extracting device comprising a a body member, dogspivoted on the body 7 member, a crosshead slidably mounted on said body member, links pivotedto the dogs and said sliding member, resilient means for urging the sliding member to a determined -pos1 t1on to retain thedogs 1n inoperatlve position and means connected with the sliding crosshead for sliding thesame to move the dogs to operativepositionr 14. A pipe extractingdevice comprising a body member, dogs pivoted on the body;

member, a crosshead slidably' mounted on said. body member, links pivoted to the dogs and said sliding member, resilient means for urging the sliding member to a" determined? position to retain the dogsin inoperative 7 tive meansconnectedtosaid device.

15. A pipe pulling. device comprising a position, means connected vvith' the sliding crosshead for sliding the same to move the dogs to operative position and flexible tracbody member," pipe engaging elements mounted on said member flexible means carried bythe' body member; said means being cooperatively associatedwith the pipe engaging elements and said'body member for resiliently urging said pipe engagingelebody" member,

ment. into inoperative position, means carried by the body member for moving the pipe engaging elements into operative, position and flexible tractive meansconnected to said device. V l V 16. A pipe pulling 'device compnsinga pipe engaging elements mounted on said member, flexible means carried bythe body member, said means being cooperatively associated with the pipe engaging'elements and said body member for resiliently urging said pipe engaging ele ment into inoperative position, means carried by thebody member for moving the pipe engaging elements into operative position, and other means carried 'by the body member for actuating said last mentioned means so that the engaging elements can be moved'to' an" inoperative position. I s

17. A device. for removing castings from rotary molds comprising a body member adapted to be inserted inthe casting, casting engaging elements carried by the member,

resilient means carried by the body member 7 i for normally holding the engaging elements in inoperative position, a pivot pin shiftably mounted on said body, a lever carried by said pin for moving the engaging elements into operative position and means associated With saidf pin forshifting the same to move the engaging elements toinoperative position.

adapted tobe inserted in the casting,lcasting:

- 18. A device for removing castings from rotary molds comprising vab'ody member engaging elements carried by the'member,

' resilient means carried by the body member for normally holding the engaging elements in inoperative position, a pivot pin shiftably mounted on'said body, a lever carried by said pin for moving the engaging elements into, operative position, means "associated with said. pin for shifting the same to move the engaging elements to, inoperative'position and 'means exterior of the moldforactuatin the shifting means.

19. A pipe pulling device comprising a i body member, pipe engaging elements mounted onsaid'member flexible means carriedby the body member, said means beingcooperatively associated with the )ipe engaging elements and said body mem er for resiliently urging said pipe engaging element into inoperative position, means carried by the body. 7 member. for moving the pipe engaging elements into'operative position, other means carriedby the body member for actuating said last mentioned means so that the engag ing elements can be moved to an inoperative position, and tractive means flexibly connected tothe-body member.

20; A pipe pulling devicecoinprising a body member, pipe engaging elements mounted on said member flexible means carriedby the body member, said means being cooperatively associated with the pipeengaging elementsand said body member forresiliently urging said pipe engaging element into inoperative position, means carried by the body member formoving the pipe engaging elements into operative position, other means carried by the body member'for actuating said lastmentioned means sothat the engaging elements can be moved to aninoperative position and tractive means universally connected to said body member for withdrawingthe device and casting from the mold.

21.;A pipe pulling device comprisinga body member, pipe engaging elements mounted on said member flexible means carried by the body member, said means being cooperatively associated with the pipe engaging ele ments and said body member for resiliently urging said pipe engaging element into in operative position, means carried by the body member for moving the pipe engaging ele ments into operative position, other means carried by the body member for actuating said last mentioned means so that the engagable in the casting, means on said member for gripping the casting, and tractive means universally connected to the body member for Withdrawing the castingfrom the mold under misaligned conditions without impairing the operation of the gripping means.

23. A pipe extracting device comprising a 6" V v [if/76547 i gaging means mounted on the body',1neans on misaligned mold,

member adapted to be inserted in the'pipe, 7

dogs pivoted'on said member adapted to grip the pipe, resilientimeans for actuatmgthe do s, rigid tract ve means universally connected to the member, and flexible. tractive means rotatably connected to the rigidtractive means, said tractive means cooperating to perniit the pipe to be-extracted from a 24. A device for extractinga pipe fronr'a rotating mold comprising aboc y, pipe en the body tendingto maintainthe pipe engag mg means'in inoperative POSltlOIl, means on' saidbody"andfassociated with the pipe, en

gaging means adapted to contact wlth a suri face for operatlng the engaging members-and other means carriedby the body and operatively associated I with the .operating means to disengage the pipe engaging means."

tatabl y connected With said shaft. J p

26.; A device for'extra'cting pipe from a ro f 'tating mold comprising a body member h'av-,

' ing a slot therein, acrosshead slidable-in said 's1ot, pipe gripping, means carried by said 7 body member, links connecting said gripping:

means Withsaid crosshead a leverpivoted to said crosshead, a floating fulcrum for said lever mounted in a slot 1n said body member;

' meanscarried' bythefreeend of said lever r for engaging a mole for actuatlng acrossf head and means on said body member for moving the fulcrum in the slot so that-the pipe I gripping means will berendered inoperative. In testimony Whereof'I afiiX my signature.

FRANK-G; c aRi'NeTo i

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