US2326378A - Submerged double acting pump - Google Patents

Description

v Aug. 10, 1943. IQIOCQNNQHlE 2,326,378

SUBMERGED DOUBLE ACTING PUMP Filed Jan. 8, 1940 2 Sheets-Sheet 2 3 v 23 a2 s\ so 56 25 5a 5'! 34 ss s by 4' 6| 53 v v v W 4 iztzizststsihi INVENTOR TORNEY terference,

Referring more particularly to the. drawings,

where the-double acting pump I (Figure l)'is to be used in a conventional driven well; a suitable pipe or well casing 2 will be used. Under these conditions, the-pumpcylindert will be of an outsidei diameter suificientlysmaller than the inside diametei pf thegvell'casing 2 to permiteasy installation' tof' same therein,- as well" as to provide 7 a passageway 4 therebetween which will permit 'flow offluid 'tothe upper end of the cylinders.

. thing which would interfere with the free oper and into the interior of same through upper inlet ports-5. The double "acting"pump'l','however,'

large pieces of gravel or rock therethrougn, a"

thesefprojections being :adapted to threadedly.

ation of inlet valve l8.'

Instead of using a threaded disc IS, the lower .end of cylinder 3 may be provided with a connector' member 22 (Figure 11) having externally threaded end projections 23 and 724, the first of engage the lowerinner end of cylinder 3, while threaded projection 24 is adapted to receive the end of a coupling sleeve 25,whi'ch in turn is "adapted to engage the upperend of a convenis 'notlimi'ted to 'use inside ofla wellcasing 2, .z

sinc obviously it is.adapted'forfsubmerged use! in a conventional ,dug well, cistern, or, body of fluid to be pumped; 3 h

.The double acting pump I (Figure-1) includes a pump cylinder 3 with upper inlet ports'fi. -A pis'- ten 6 suitably mounted on a hollow "plunger rod. (I is adapted for reciprocating endwise movement within cylinder.3 under-theiniiuence;of endwise movement 'of;;pistonrod itv suitably cqnne'cted to plun e: r sczf i talmemeen's 1 c threaded connecto rg member 9, .Outlet means for fluid fl win h ou ho ew r n er "millpr vi d,- nd n 'conr n io al' f rim. f'i s nsists of 1 outlet i slits I mar -passageways H3 {adjacent inder 3at1the' ends there f' -is preferably }threaded plates: I; d512, which are; cqrrespondingly threaded onftheir-gperiphery, g -inay be screwed l thereinto a: suitable distance, which in preferred I construction will correspond; with the end of the threads .on-the inner circumference pi the; cyl-- V this man .ner presents the advantage of allowin I the upper 1 and lowerjpartition plates to-be frictionallyheld in -desired pc-sitiondue to binding action gi'the threads .when- 'the=partition plates reach a posi-v tion corresponding with the: endoi-jthe, threads in the cylinder. -;-This prov ides a simplifiedpositive f I construction which is highly advantageous from 7 1;the;.ma nuf acture, ,-'assembly; and ma' it .1 standpoint; r l I, 1 I The upper partition plate :I l in its final assembly position will preferably be slightly below "..upper; n t' p rts} to aQi iefiafi w q zfl the ch mbe l ab p e partit n p a e- I for' relatively free flow under operting conditions. throu g DO p -,:-Fi l &31 nto the-up 9?- tion of the pumping chamber I 5 of the cylinder 3,

as will be hereinafter described. Constrnction in i t thifsm'anner also presentsi the advantage of-pro 1 tecting the} inlet valve assembly .from ergternal V --r,interfe e ce. ,1

. 1' .=The:.= 1ower par it o g at p operating position will be sufficiently spaced from the lower end of cylinder 3 to provide a chamber 1 I 6 in which ste'm l] of spring-held .loweninlet inder -3.: Threading the cyl nder g f ninjas peered va ve. l8 m t eel i op r te o "9 xtermlin- Fw l 1 1193. the pump,

the end of cylinder ;3 upon .rotation into. final tenance tional .w'ell. point 26 which is constructed with screen section 6! to separate gravel and sand from water onother fluid being drawn therethrough.; A central passageway 21' (Figure 9) through connector. member 2 2' acts to connect.

chamber IS in the end of pump cylinder 3 with the'interior of well point 25.

' "A similar connector member 2215 preferably usedat the upper end oicylinder-(Figure ,1)

' forjoining same' t of the lowerendeof production tube; 28 which is adapted-to carry the j fluid being pumped to the surface or delivery spout (not -'shown)-.' Where the connector member 22 is fused at t he upper end of the cylinder 3, its passageway Z'Lwill be centrally located and of a'size closely fitting. but permitting freeendwise move- Iment of hollow plunger rod'l therethroughh To 7 prevent leakage through passageway 21, packing grooves-29 may be provided and suitable packing 30, such as a leather ring, used therein. V A modified'construction for theconnector member 2 2 is shown in;-Figure-10. This connector member 22 is counterbored at its upper end and threaded to receivela packing gland 3|; adapted to compress packing 3ila in accordance with standard packing gland practice.

v The upper partition plate II (Figures 1, 3, and .8) is provided with a central passageway '32' Y which is preferably centrallylocated and of a size closely fitting but permittinghfree endWiSe movement of hollow. plunger therethrough, The

pas sagewayfiiz in preferred construction is o fl leathenor the like as a iurther aidinproa fluid-tight joint with hollow plunger ;;Inlet'por ts I3 through partition plate ll are ovifdedLand these ports are normally closed by: an (annular valve gplate '33 carrying upwardly projecting stems.3fl=whic h, pass through and slid ably fitsuitab le openings 35in partition plate I I between port s l3. 7 Compressionsprings 35 are conventionally mounted on stems'34 and held in operable position as by means :of washers 31 and permit inflow offluid "through ports [3 under suction conditions produced by downwardfmovementof piston 6. The spring 58 used inconneca n e-tjo'the opening of the valve under cgii as J jof iflow offluid into the pumping chamber I The USB'Of mild tension springs at these points tion with lower inlet valve i8 is likewise preferably of mild te nsion sufiicient to cause; positiveoperation of the valvewith very moderat re Y {presents theadvantage of'reducing the force to be exertedfin operatingthe pump with corre spending increase" in vefiiciency. of power input pertunit ofxfiuid pumped.

position. To permit flow -of.-fiuid through:disc

9, his; provided with 'periorations 2 l (Figure- 5) sufiicienty small in size to preventpassage of;

I onepreferred construction, the lower end of the hollowiplunger rod 'i' is machined to areduoed uniform diameter'ffor a short} distance to grooved andlprovided with suitable packing 62 I fromthelatteri- 1 A a 2., In a double acting pump, the combination. which includes a cylinder which, is internally v threaded a hort distance at both ends, externally ,7 y

Other modes of applying tlieprinciple of my invention maybe employed instead of those explained, change being made asregard the mechani'sm'herein disclosed,'provided the means stated by any of the following claims or the equivalent of such stated means-be employed. 1

r I therefore particularly pointout and distinctly claim as my invention: a i r t 1; ma pump,the' combination which includes acylinder internally threaded a short distance at'both ends, externally threaded-upper and lower partition plates; one-ateachend of said cylinder andthreadedly engaging same substantially at the inner end of the threads thereof, inlet valve a means for said cylinder, said valve meansbeing separatelyfmounted on' both -of-said partition of said "piston and then the vother in accordance with'outlet'requirementsl 3. In a.dQubleactingpumpj the combination 7 which: includes a cylinder. which IiS internally threaded a short distance at both ends, externally threadedmeans; one ateach end oisai'd cylinder and'adapted to engage said'internal threads of said cylinder, a piston, 'a plunger rod, said externallythreaded' means at the upper endofsa'id cylinder having v a suitable central passageway through which said plunger rod is adaptedeto' 'slidably "pass and. closely fit, said externally i threaded means at the upper end of said'cylin'der also having inlet openings'therethrough, an annular valve means within'said cylinder and adapted. to cooperatewith said inlet openings to control the fluid flow'therethrough in accordance with plates, a connector member ior'the'upperendcf said cylinder; said upper partition plate being-substantially spaced from the connector member to provide a compartment therebetween, saidcylin- 1 'der having at least one passageway through the {side thereof into, said compartment between the connector member and upper partition plate. a

plunger rod passing through said-connector memher and upper partition plate and forming arelativly; fluid tight sliding fit therewith, a piston K nounted on said "plunger rod for reciprocation.

withinisaidcylinder-"in the space between said inlet" valvecarrying r partition plate assemblies, V and an outlet means; from said cylinder, said outlet means including a longitudinal passage- .wayin-said plunger rod with discharge outlet therefrom outside of said cylinder, .and a valve means-at said piston connecting said. passage- 7 way first at one side of said piston ;and then the otherjto said cylinderwior flowfof pumped fluid;

threaded upperand lower partition plates, one

:at; ieach 'e d. of 1 said cylinder and 'threadedlygem gagin samesubstantially at the inner endoi tion plates, azconnector member for the upper i said valve means being separately i,

, passageway through said plunger: rod first orrone pumping requirements, said externally threaded V meansat the lower endof said cylinder having 20' at least one inlet passageway therethrough, a valvermeans within said cylinder and adapted to cooperate with the inlet portion of said last named externally threaded means to'control the fluid fiow therethrough in accordance with pumping requirements, xsaid externally threadedfmeans at both ends'of said cylinderextending thereint/o. asufiicient distance to .form v an '1 inletacompartment at each end of said cylinder and-from which fluid can flow" through'said inlet passageways as required for-pumping purposes, eachlof said-compartments, having at least one suitable winletr for-flow of fluid thereinto ,andthence through. said respectivevalve-;controlled inlets through said externally threaded .rneans, external means forprotecting said lower inlet valve,

means on the end of said plunger rod within'said cylinder-for mounting said piston for limited endwise movement thereon, said .piston. cooperating with themeans onI-the end of said plunger rod so as to act both asfa piston and an outlet "valve,

and-anv outlet means:forsaidipylinder; said out let means including 3 ;alongitudinal: passageway through {said plunger'rrod 'with discharge outlet therefrom outside-"of -said cylinder, :said piston connecting the; interior of-saidcylinder with the side of said piston and-then the otherin'accordiance'with the reciprocation ofthe plunger rod;

4. In a doubleecting 7 pump, a cylinder; an

inlet means ateach end of said cylinder-,::each

ofsaid inlet means including a perforated partiend of said cylinder," said upper partition plate being substantiallyispaced from t he connector member to provide an-inlet compartment therebetween, said cylinder having at least one passagewaythroughth side-thereof into said inlet compartment between saidconnector member and said; upper partition plate, a plunger 'rod passin through saidconnector member and'said upperpartition plate and having a relatively fluid tight plunger rod for reciprocation within said cylinder inthe space between said inlet valve carrying partition plate assemblies, and 3111011171612 means for said cylinder;saidioutletmeans including a longitudinal passagewayiin said plungerrod'with discharge outlet'therefrom outside of said cylinder, saidpiston being mounted on the end of cooperate with said-piston to provide outlet valve action in manner connecting said cylinder in? Y terior to saidioutlet passageway first onaone side :tion m'embe'r withqa valve seat,=a valve for each 0f said-valve seats;-:a piston slidably mounted within said cylinder,-y-said-pistoncomprising a ,bodyrnember having-a hub":portion with a uniformcross-section longitudinal central passageway therethrougnfmeans'mounted on said body member for frictionally contacting theiinner cirsliding-fit with both, ,a-pistonmounted on said a member, and means for gripping said cup leathers cumference of the cylinderiwall and forming a sealedjoint therewith underpumpingfaction, said meanscomprising a pair of suitable size-cup leathers; a'radialflange extending from said bfody against said flange,, a hollow plunger maths end ots'aid plunger rod; within saidcylindergfor a' portionof the piston body member; and a pair of spaced-apart stopmembers onthe inner end of said plunger rod, each extending completely around same; said hollow plunger rod 'bein'gprovidedj with a plurality "oflongitudinal, slits 'between said stop member's,= said longitudinal slits terminating at each end: just short of reaching, 'saidi stop membersto lfacilitate leakage-desistaces-ave 1 V 1 -ance; said pistonf body", memb slidiablyt mountedsior;limiteditravel onrsai'dhollow plunger;

rod between saidstop. members in:mannen suchr that; when the body member is in contacttiwithz either stop member; a1substantialportionaofisaid;

slits will. beexposed at,.,.thet nontecdntacting end:

" edid-perforated meanssoiastogiorntazsmal qcmf l werznarti on p tezii 'allygiat th peer;

ofithe bodymemb'er, the:endstofvsaidzbodyimemer I V hen-and the :corriespondin'g;stop:members nayingt cooperating faces if orforming a: sealed joint when; in contact; with eachiiother; wherebyntuiderr um s; ing actionsaide piston acts? not: only-:as-zar; piston"; but a valve as welliandlhencec facilitates high hc V efiicient-pumpingactiom. 1 V. V 5; A pumping apparatusfcomprisingiaipfoduc tion-= tube, apump; cylinder, a2 connector: member;

for j oiningthetlowerend of said? productionjtnbei to theiupperr end ofsaid, cylinder, anzupp tpa'rtir "tion platewithin: said-cylinder andspaQed; irorn: said connector membertoform-,a compartnrent; means for fastening said par-tition plateiryfixed position; said cylinder havi'ng opening-s throughthe sides thereof; into said-,compartment-,- inlet valve;means,;sa id inletvalvemeansrincludingr an: inlet valve mounted on said upper partition plate 3 for permitting'fiuid fiow from said compartment to the portion of the cylinder below said partition plate, means for closings'aid inlet valve at the end of flow of fluid from said compartment 'into said cylinder, a-valve seat for'said valve, a perforated inlet means at the lower end of said 0 cylinder, a lower partition plate within said cylinder and spaced from saidperforated means so as to form a compartment therebetween, means for fastening said partition plate in fixed position, an inlet valve means, said inlet valve'means i includingan inlet valvemounted on said lower partition plate for permitting flow of fluid from said compartment into the space within said cylinder above said partition plate, means for closing said inlet valve at the-end offlow of fluid from said compartment into said cylinder, a valve seat for said valve, a hollow plunger rod passing through said connector member andzupper partition plate, saidplunger rod having areatively tight, but free sliding fit therewith, said plunger rod also having an inlet at its endwithin the cylinder and an outlet within the producing slidably'mounted on said hollow plunge v rod between said stop members in manner such that tion tube, and a valved piston on the end of said 1 hollow plunger rod within said cylinder and adapted to cooperate with the inlet on the endf i of said hollow plunger rod for flow of'fiuid therethrough for pumping action under reciprocating movement of said valved piston endwise of said' cylinder and on said hollow plunger rod; v

6. In a double acting pump adapted for sub-.

merged use while connected to a production tube, the combination of a pump cylinder internally 'end'oflthertlrreads infithe 1, r endpfrs V i nmit rtssthrw h said loweriparititicneplatet a nletrw ive fon said nons eci c meansare normal y-holding saidinlet M ilman-classed; cs e;-

' tion," annpw ipiunee rod: nassinggthrcu n s I- upper partitio'mplat slid grfit h iwi hi see-1p V ingan; outlet-{lat endr-w thin th'e induction} tubeigap st nslida rm unted:w iupz-sa dzcvlin de s idmisto r com ri ng-a cyl nder Wal -enga e ins: re ion with; ae odv'mem enhar ner aub nl n eeli ek i h adapted-to closely ,7

H w r t rc a z ehi b p iiq V mber; a 1 ,ef-peee dr e therebetween; sat

I V andsiciner; members said, pl n r-L rod: havin a1-re1ativ mti h s but re r nneeltrodaals rhaver pqrt cn withra unifomaic $rS QtiOD l0 gi nt -p ewa t ffii n'oua ith endz yli ld rsbeins ba s- 1*; a drelri eeer e eaehze e yaerou d isaidelic ingprovidedw pluralit Ql'lglglldiilfill; twe n-p d QPTIE PQPQ Ii a z ldil i milld 51, 1 terminating at each endjust short of reaching said stop members, said piston body member bewhen the body member is in-contact with either stopv member a substantial portion of said slits" I will be exposed at the non-contacting end ofthe body, member, the ends of said body member and the corresponding stop members having cooperat 7 ing faces for forming a sealed joint when in con 5 tact with each other.

7. A device of the classldescribed,comprising a pump cylinder, partition members within said cylinder and'spaced a short distance'.from the ends'of same, means for anchoring said partition members' in place,'inlet valve means for -said; cylinder, said inlet valve means being mounted ,on said partition members, a tubular plunger rod passing through one of said partition members, means onsaid partition member forlp foducing a substantially fluid tight sliding fit with said plunger rod," a connector means for joining one'end of said cylinder to a production tube, said connector means closely fitting saidplunger rodwhile permitting same to freely slide therethrough,

' means on its periphery forming a sliding seal joiner member on the threaded at each end, an externally'thre'aded con. i nector member for joining the lower end of'sald with the cylinder wall, said body memberybein longitudinally bored and faced atits ends, a end of said. tubular plunger rod, said joiner member forming a slip-fit joint with said body memberso that the latter can slide endwise a limited distance thereon, and means for sealingthe ends of said body member on said joiner member, alternately at one end of same and then the other to form a substantiallyfiuid tight j joint in either position, said joiner member having openings in its periphery in the area over which said body member slides, and at least adjacent the ends of such area, whereby under pumping action, themovement of said body memannular'inlet valve in closed position, a perforated means connected to the lower end of said cylinder, an externally threaded lower partition plate within said cylinder and spaced from her on said joiner member acts as an outlet valve with outlet of fluid from said cylinder on alternate sides of said piston through said tubular plungerrod. V '8. A pumping apparatus comprising a production tube, a. pump cylinder, a connector member for'joining the lower end. of said production tube a piston mounted on said plunger rod forreciprocation within said cylinder, said piston having a single sliding body member with 6 t to theupper end of said cylinder;{said connec'tor' member having an outsidesizenot exceeding the outside {diameter ofsaid cylinder, an inlet valve means foi said cylinder at the upper" end thereof, means for connectingsaidfinlet valve" to the exterior of said-cylinder for flow of fluid into; said cylinder through-said inlet 'valve under suc-' 3 tion pressure, an inlet valve at the other end of said cylinder, means-for protecting said inlet 1 valve-from externalinterference, means for-cone necting said inlet valve to the exteriorof said cylinderior flow of fluidfto said cylinder through said inlet valve under suction pressure,'a hollow plunger rod passing from saidproduction tube into said cylinder through said joiner member,- means for forming-a seaIed jOint between said joiner member and said plunger rod while per- Initting' the latterto have a 'ireesliding fitthe re with,'*said plunger rod; having an inlet 'atits end withinthe' cylinder and an outlet at its end with in the production tube, a piston Within said cylin der, said piston having a body 'm'ember' longitu dinally bored and faced at its ends andhaving means on its periphery forming asliding seal with the cylinderwalhsaid sliding "seal means body member slides,v and .at leasti-adjacentbut gamers messing a pair. ofi-cupleathers; a supp rting member for said cup leathers, saidsupporting means comprisinga radial flange. 'extendingfmm said piston body member, and continuous means fotgripping said-cup leathers withtheir backs i against "said iflange ra.joinerzmember. onethe end of said-'hollow plunger rod, said joiner-member beingadapted itoislidably. fit the bore of saidpiston body member immanner permitting limited endwis'e sliding offsaid .body' member on said -joiner,.member, saidjoin-er. member having 'openings in its peripheryin the areaover whichsaid j spaced from the ends of such area to check leakage,[ and shouldered means cooperating with said' joiner member for sealing with the ends of said=bodymember atth ends of its-travel onu saidjoiner member toform a substantially fluid tight joint, whereby under pumping action; the movement of said piston body-member onfsaid joiner memberacts as an outlet valve for flow of fluid from said cylinder at alternate sides of saidjpistonthrough said hollow plunger rodfi LEVI LiMcCONNOHiEa-

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