US1675082A

US1675082A - Valve for pumps

Info

Publication number: US1675082A
Authority: US
Inventors: Percy W Aular
Original assignee: TITUSVILLE IRON WORKS Co
Current assignee: TITUSVILLE IRON WORKS Co
Priority date: 1926-12-28
Filing date: 1926-12-28
Publication date: 1928-06-26
Anticipated expiration: 1945-06-26

Description

Patented June 26, 1928. 5

UNITEDSTATES PATENT. OFFICE.

PERCY AULAR, OF TITUSVILLE, PENNSYLVANIA, ASSIGNOR TO THE'TITUSVILLE IRON WORKS COMPANY, OF TITUSVILLE,. PENNSYLVANIA, AJCORPOR ATION OF PENNSYLVANIA.

VALVE FOR PUMPS.

Application filed-December 28, 1926. Serial No. 157389.

This invention relatestoa valve mechanism which is more particularly intended for use in slush pumps. I r i Ordinarily such pumps have their valve seats forced into a passage in the pump body leading to the pump cylinder and a cover is, placed over the opening in the body through which the seat is introduced, which cover normally serves as a buffer and a re tainer for the spring whereby the valve is yieldingly held in engagement with the valve seat. It has been found in practice thatthe fluid under pressure has a tendency to wear the valve seat so that it will leak and also todestroy the adjacent parts ofthe passage leading to the pump cylinder dueto the abrasive action. of the. grit, sand and the like in the fluid being pumped, thus making it necessary in a comparatively short time to replace. the entire body of the pump which contains the cylinders. I y 1 It is the purpose of this invention to pro.- vide a pump in which such expensive re.- placement is rendered unnecessary and to that end this invention consists generally in mounting the valve mechanism in a. cage or housing which is separate from the body of the pump but detachably connected therewith, which housing and the parts mounted thereon take practically the entire action, of the material beingpumped and can be readily replaced when worn outwithout necessitating replacement of the body containing the cylinderythereby effecting a considerable economy in the industry which employs such pumps.

- In theaccompa-nying drawings: V Figure 1 is a fragmentary vertical. section of one form of valve mechanism for slush pumps embodying my improvements. Figure 2 is a horizontal sectiontaken on line 2-2, Fig. 1., Figure 3 isafragmentary section similar to Fig. 1 showing a slight modification of my invention.

Similar characters of reference indicate like parts in the several figures of the drawings. I

The numeral 9 represents the body of the pump which may contain any desired number of pump cylinders, but in common practice two cylinders. are employed and the body is provided with inlet and outlet passages through which the fluid to bepumpedv is conducted to and delivered from opposite ends of the cylinders. V Inasmuch as the in lot and outlet passages are substantially body is provided with an opening 14 lead:

ing to. the exterior of. the pump body. Around the outer end of this opening 14 the pump body is provided with an annular outwardly facing shoulder 15. y

Arranged withinthe .pocketz12 a valve cage or housing 16: preferably of circular form which has its inner end facing the inner shoulder 13 of the. body and provided at its outergend' with a head 17 which forms a cover for closing the opening 14, and within the cage the sameii-s provided-with a cavity or conduit 18 one end 7 of which is shoulder 13 and opposite this shoulder the circularand opens lengthwise through the inner end of the cagewhile its. other end'8 opens laterally through the sideof the cage in register with the correspondingparts. 10, ll 1 of the passage of the pump body. leaktight joint is produced'between the inner end ofthe valve cage and the inner shoulder 13 of the body by a packing 19 consisting preferably of a rubber ring-interposed between these surfaces, and a leakage'through the joint between the head of the cage and" the body of the pump is likewise prevented by a packing. 20 having vpreferably the form; of a rubber ring clamped between the outer shoulder of the pump body and themwardly facing shoulder on the outer end of the valve cage. This cage is removably secured in'tbe pocket of the pump body by suitable fastenings consisting preferably of a plurality of bolts 21 passing through the external marginal arts of the ca e or housing and into the adiacent parts of the pump body. Fitting in the. longitudinal circular opening 7 of the cage is a valve sleeve or tubular bushing 22 which is provided at its inner end withan inwardly facing valve seat 23 and on its periphery with an outwardly facing annular shoulder 24 which engages the inner side of the pocket 18 around the longitudinal opening 7 On the outer end. of the valve bushing the periphery of. the same is provided with. an

annular locking groove 25whi'ch receives the bore portion of the inner'packing ring 19 Owing to the elasticity ofthe latter the latter can be suificiently" sprungto pass over the outer end of the valve bushing and then spring into the groove 25. By this means the ring 19 performs the dual function of a packing to prevent leakage between the inner end of. the cage and the pump body andalso as a locking means: for holding the valve bushing in its opening in the cage so that dis lacement of thesemembers relatively to eac other is prevented.

The valve in the present instance consists of a disk 26 of 'balata' or'some fibrous or elastic material which is arranged within thecavity of the housing or cage and mov able toward and from the seat 23 of the: valve bushing. for closing or opening? the passageway through the valve mechanism. on its top or rear side this valvedisk is engaged by a top plate 27 and on. its underside or frontsidethis valve. disk is engaged by a bottom plate 28 which is provided with depending arms .29sliding against the bore of the valve bushing, saidbottom'plate and arms together forming a guide whereby the valve disk is maintained in proper position during its movement toward and fromthe valve seat on thebushing The top and.

bottomplates

27, 28, are clam" ed against opposite sides of'the valvedisk a fastening devicefconsisting preferably of a bolt 3Qengaqing the central parts of the same.

Forjt e p urpose ofcausing the valve to close promptly spring 31 "preferably of helical form is employed. which spring engages'itslower or innerfend with the top plate'of the valve disk while its upper or outerendrengages with the bottom of. a recess32. injthehead or cover ofithe cage, thereby servingto hold the valve yieldingly in its closed position. This valve .is opened by pressureifagainst the underside of the same and is closedby pressure as plied'to the upperside thereof'in a well kn Wama ne -f When'thevalve disk, bushing, cage 'or associated parts become worn to such an extent that the same leak then the entire valve mechanism can be removed as a unit from the passage of the pump body by first detaching the bolts 21 and then lifting the cage or housing out of the Docket of the passage. Suchlifting is facilitated by means of a ring which is secured to the "outer end of the cage and adapted to be connected with a hoisting device of any suitable character. After the. cage. is. removed the lower or inner packing. ring may besprung out of the groove of the valveibushingrand then the. latter may be. removed from the cage after taking out the upper valve plate, guide, bolt and'spring. A new valve bushing, disk and other parts may now besubstituted for thoseinthe cage whieh were worn and then the cage may be restored in" the pump body as a unit in its'norma'lposik tion.

" As shown in Fig. 1, the face 34 of the valve disk is flat and enga" swith a e'o'r respondingflat valve seat "2 but if desired t e marginal part of the faceof the valve disk may be conical, asshown ttain Fig. 3, andco-operate with a seat 36015 correspending shape at the upper endof the valve bushing, as shown in the same figurel Each of these forms ofiny' invention providesa combination of parts which can be easily removed when worn and replaced by newparts infthe pump bodyas a. unit, thereby avoiding the necessity of'replacing the body of the pump containing the cyl; inders ashas been necessarvhereto'fore when III the partsformed"integrally withfthe bOdY containing the cylinders'become worn by the abrasiye' a'ction ofthe mnd laden fluid which was pumped in rotary drilling or similar i ise I claim as my. invention 2 1, A valve mechlnism for pumps compris: ing a bO dy haYiIlY a passage for the fluid, an opening exten ing from said passage to the exterior ofthe'body and aninternal shoulder around said passage, a cage movable through said opening and having a conduit registering with said assage; a valve bushing arranged in said conduitand provided at its inner end with a valve seat and with an inner shoulder engaging the inner side of said. cage and provided atits outer end with an ex e nai'groqveg a packing arranged. betweenfsaid internal shoulr the sie ai age dnesine i ai aware, a v ran d in th a e ndle w d nd from sa a a 2. A valve mechanism for pumps comprising. a body "having a passagefor the fluid, an openingextending "from'said pas sage to the exterior of the body and an'internal shoulder around said passage, a cage movable through said bpeningand' having a conduit registering with said passage, 21 nal shoulder and the inner end of said cage valve bushing arranged in said conduit and and engaging with said groove, and a valve provided at its innerend with a valve seat arranged in the cage and movable toward 1 and with an inner shoulder engaging the and from said seat.

5 inner side of said cage and provided at its In testimony whereof I hereby aflix my outer end with an external groove, an elastic signature. packing ring arranged between 'said interv PERCY W. AULAR.