US1647734A - Self-cleaning valve - Google Patents

Description

Nove l, lmczll'lo G. M. KELLY SELF,` CLEANING VALVE Filed May 14, 1925 J6 i WAL:

mw w Patentedq Nov. 1,1927. l

, UNITED sTATEs'PATENT OFFICE.

GEORGE M. KIIE|LLY,.OFQ CHICAGO, ILLINOIS, ASSIG-NOR, BY MESNE ASSIGNMENTS, OF SIXTY PER CENT TO PATRICK J. KELLY AND TI-IRTY PER CENT 10 JOHN' F. KELLY, .BIO'JJH OF MUSKEGON, MICHIGAN, ANI) TEN PER CEN T T0 FRANK H.'l T. POTTER, 0F

CHICAGO, ILLINOIS.

SELF-CLEANING VALVE.-

Application led May 14, 1925. Serial No. 30,146.

This invention pertainsv to valves for 1 dbris .or sediment from fluids passing'therethrough, but few if any provide any method or apparatus by which deposits upon the seat or seats of the valve or deposits upon any other working part may be prevented or restructed in this manner is illustrated on pageI moved A few valves of the gate type have been designed with removable bushings or seats for the purpose of removal of the seat and the substitution of a new, seat when the old one is worn or damaged. A valve con- 162-of Crane catalogue No. 51, June, 1923. Valve seats of this character may becleancd or renewed by removing an 'opening or by dismantling the valve for access tothe worn or damaged parts, but cleaning and renewing such part or parts is a very costly procedure'. This cost is involved not alone because of the labor involved, but also because it may be necessary to shutdown the whole line served by the valve during its repair. It is apparent that serious consequences could easily develop from such procedure. The 4invention hereinafter more particularly disclosed entirely obviates such" requirements and occurrences while providing a uniquely elhcient construction at compara.

Vtively low cost of manufacture and operation.

`Another object 1s to vprovide a. valve y mechanism .in which' the valve f(in this instance, the valve gate) seat faces mayv be maintained free from sedimentary deposits andother dbris when the valve is open and regardless of the time during which the valve may remain open.

One object of my invention, therefore, is lto provide a' valve mechanism which in its operation will be `self-cleaning, preferably Aincluding for its purpose combination selfcleaning'seat and self-cleaning gate or valve head members.

Another object is to provide a valve constructed in such a manner that wear on the valve face sometimes known as cutting. or channeling caused by fluid and abrasive dbris passing thereacross when the valve is 'valve body or its operating parts may be compensated, a construction which will increase 1ts normal useful life and a construction wherein the parts may be easily and readily replaced by like parts formed frommaterials better adapted for other usages such as when the -valve is usedin an acid fluid line, should become apparent fromthe. details of the description and from the claims, and from the drawings in which Fig. 1 is a diametral sectional elevation of one type of valve construction madein accJordance with my invention.

Fig. 2 is a part section taken at right angles to the view of' Fig. 1, certain f the valve parts being removed. i 'Y Fig. 3 is a transverse section taken 'on the line-3 3 of Fig. l, and

Fig. 4 is a similar section taken on the line 4-4 of Fig. 1.

The invent-ion is shown appliedv to a valve of the rising stem gate type. A body portion 2 provided .with inlet and outlet openings 3 and 4 -of which there may be'any suitable number, is formed to provide an interior chamber and an outwardly lianged portion 6 forming a shoulder 7 for a purpose to be hereinafter described. The liangedportion 6 is interiorly threaded to receive aK correspondingly threaded flanged portion 8 of a bonnet 9 interiorly threaded as at 11 to receive threads 12 formed on a -risin stem 13 passing centrally therethrough. e bonnet 9 may be provided with the usual packing gland 14 and packing gland cap 15, lwhile the stem 13 is provided withI a hand wheel TheA valve body 2 isprovided with lugs 18,

19, 2O and 21, which project from the walls thereof to provide . recesses 22,23, 24 and 26 .gradually decreasing in width downwardly Q2, neet/.ree

` described will seat. The lower edge 35 is arcuate as will be clearly seen from Fig. 2 and is tapered as at 36 for a purpose also to be hereinafter described. rlhe seat members are also formed with a recessed portion 37 and arcuately shaped, outwardly tapering portions 38 providing a recess 39 open at its inner portions upper end and with lug portions 41 extending behind and adapted to rest upon the shoulder 7 formed on the interior of the body 2 of the valve. A screw washer or gasket 42 which may be of other construction if preferred, is preferably interposed between the threaded portion 8 of the bonnet 9 and the top face-of the lug or projectino' portion 41 of the valve seat member 32.

uitably positioned upon the end of the stem 13 for upward and downward movements therewith are gate valve members 43 interiorly-recessed to receive a ring spring member 44 adapted to urge these gate members outwardlyy so that their plane faces 46 will tightly contact with the similar plane faces of the valve seatvmembers 32. These gate members are preferably formed with an arcuate recess 47 anda parallel projecting edge 48, th-e outermost point of which is preferablyconstructed to project slightly beyond the plane of the surface 46, whileat their upper sides these members are tapered 0E as shown at 49 in Figs. 3 and 4.

It has sometimes been found preferable to aid the spring 44 in urging the respective gate members 43 outwardly into `contact with the valve seat members '32 by suppleinenting their action. For this purpose the of the gate members .are ta-r pered. as shown at 51 for wedging engagement with a wedge lug 52 formed integrally with the bottom of the interior of the body 2. However, the lug 52 may be omitted or constructed in two parts placed on .either side of the valve body as will be readily understood.

In operation, assuming the valve to be in closed position as shown in Fig. l, rotation of the stem by means of the hand wheel or other hand operating device, will raise the gates 43 and the arcuate projecting portions 48 will contact with the bevelled surfaces 36 of the valve seat member and tend to urge the gates toward one another or toward the stem against the action of the spring ring 44, and at the same time the bevelledl'surfaces 49 of the gates will contact with the correspondingly bevelled portions of upper portion of the seat member. As the gates are raised further the edge '48 will scrape resiliently across the interior face 34 of the seat member and the edgel 38 of the seat member will scrape resiliently across the face 46 of the gate member, removing any deposits or dbris carried thereby, and upon its further upward movement the faces 46 will ride into the depressed portions 39 of the valve seats, while the portions 48 of the gates will drop into the recesses 37 of the seats. As will be apparent from the drawings, when the gates are fully raised their seat surfaces 46 will drop intothe depressed portions 39 and since the surfaces 46 and 39 conform with one'another, they will contact with one another over their entire areas and prevent'accumulation of dbris on either surface. The reverse movement of the stem will reverse the ope-rations just enumerated and a cleaning action is afforded on the downward movement of `the .gates also. The spring 44 will at all movements of the valve gates tend to urge them outwardly into tight contact with the valve seats, and when the gates are in their lowermost position insure a tight engagement with the seat anda tight engagement of the seat with the valve body. While in this` position the wedge or wedge lugs 52 form an additional sealing means.

As will be clearly apparent from the construction of the valve gates or closure members 43 their arcuate lower edges when raised will almost instantaneously uncover a relatively large portion of the inlet and outlet openings in the valve seats, allowing any dbris which may have accumulated in the fluid-at the points of opening of these passageways to be dispersed over a relatively wide area with the firs-t inrush of fluid therethrough and also permitting the water to flow in and out of the ports in a relatively large volume substantially instantaneously. This will prevent cutting or channeling action in the bottom edges of the valve gates so frequently an objection to other types of valves. This advantage of having a fluid iow over -practically the full surface area of the valve seat and valve .gate when the valve is partially open is but one of many features and advantages to be had with its 0peration. It is quick opening, self-cleansing, practically the whole interior operating tions can be replaced without removal of the shell or body, a longer valve life with-low., cost 0f maintenance, contraction and eXpansion of the various members of the valve are adequately compensated, there are no primary parts with pockets in which sediment may collect where it is not desired and the valve body and parts may be so constructed that they can be used for acid iiuids or any other unusual condition or requirement.

the

por-v HNI Many' additionaladvantages shouldl be readily' perceived,and since various changes may be made in the construction andoperation without departure from the spirit of 5 my invention or the scope. of the appended claims ll do not wish to be limited to the general or specific construction shown and described.

l claim: v l. In a` valve, a body having inlet'and outlet ports, a valve seat for each of said ports, a valve stem, port closure members ony said Y stem, and a U-shaped spring partially embracing said stem and engaging one 0f said closure members for urging such member into contact with its seat. I

2. ln a valve, a body having inlet and outlet ports, a removable valve seat for one of f said ports, a valve stem, a port closure mem- .zo ber on said stem, and a U-shaped spring'par# tially'embracing said `stem and between said stem and said closure member for normally urging said member into contact with said seat.

3. ln a valve, inlet and outlet ports therein, a valve seat member for one of lsaid ports, a port closure member adapted to cover said seat, means for moving one of said members to cover and uncover said port, and means- 30 projecting from one of said members at all times toward the other lfor scraping contact across the face of the other said member during movement of either.

4. lin a valve, inlet and outlet ports, a 35 valve seat member for one of said ports, a-nd a port closure for covering -said seat, said members havingd cooperative seating surfaces, means for moving onevof said members to cover and uncover said support, and a rib on the seat face. of each of said members for scraping the cooperative seating surface of thel other during the movement of either. jn

5. l'n a va'lve, having inlet and outlet ports, a valve seat member forone of said ports, a port closure -member for covering said seat, said members having cooperativeseating surfaces, means for moving one of said members to cover and uncover said port, means projecting transversely of the seating surface of each of said members toward the other for 'scraping the cooperative seating surface of the other upon movement of either, and means for urging one .of said` members toward the other.

6. lin a valve, having inlet and outlet ports, a valve seat member for one of said ports, a port closure member for covering'V said seat, said members having cooperative seati0 ing surfaces, means for moving one of-said ^members to cover` and uncover said port,

means secured to and projecting transversely of the seating surface olf each of said members toward the other for scraping the co- 65\ operative surface ofthe other lupon move-I ment of either, and resilient means lfor urging one of said members toward the other.

7. ln a valve having a port, a removable valve seat member for said port, a .port closure member for covering said seat, said members having cooperative seating surfaces, means for moving one of said members to cover and uncover said port, means `on each of said members and projecting toward the other for scraping the cooperative surface of the other upon either movement of either, and resilient means for urging one of said' members toward the other.

8. In a valve in combination, a valve seat member, a valve head member, said members having cooperative contact surfaces and one of said members being movable transversely across the contact surfaces of the other member, andmeans operatively interposed between said members upon movement pf said movablemember for scraping across one of said contact surfaces to clean it.

9. ln a valve in combination, a valve seat member, a valve head member', said members having cooperative contact surfaces and one 0f said members being movable back and forth across the other member transversely of the contact surface of` the other, and means integral with the contact surface of one of said members and adapted to be inter- .s g posed between said membersfor scraping across the Contact surface of the other of said members when 'said members are moved rela-` tively to one another in either direction.

l0. ln a. valve in combination, a valve body, a valve seat .in said body, a valve head adapted'to engage said seat, means for respectively raising and lowering said headinto fand out of contact -,with said seat, means operatively interposed between said members upon movement of said movable member for scraping across one of said contact surfaces to clean it, means for `resiliently urging said tra head andseat relatively together during raisi ing and lowering movements 'of said head,

and means integral with said body for positively urging said head when lowered under pressure against said seat.

ll. ln a valve, a body provided with al port and a bonnet connection, a valve seat having an integral elongated -portion extending between said seat and said bonnetcon-A nection, and 'means including a transverse shoulder integral witlithe elongated `portion ofthe seat' for removably securing the seat to thef body adjacent said `bonnet connections 12.. ln a valve, a body having a port, a removable seat for said port and provided with an integral projection thereon lat a portion spaced from the sea.t\surface, a shoulder on said body, and means for releasably securing said projection against said body shoulder.

13. n a valve, a body provided with a port, a removable seat member for said port,

said body having a transverse shoulder, said member having an integral transverse shoulder cooperatively engageable with said body shoulder, and means removably securable to said body for removably securing said shoulders together. f

14. ln a valve, a body having a port opening and a bonnet connection, a removable valve seat tor said port movable transversely of said port into and out of position with respect thereto, said seat having a portion extending away from the port toward said bonnet connection, a flange projecting laterally from said portion remote from said port, a shoulder in said bonnet connection cooperative with said liange, means for securing said flange and shoulder together, and means inv said body 'for receiving and positioning said seat with respect to said port and for wedging said seat against the body adjacent said port when said seat is moved transversely of said port into position.

l5. ln a valve, a body having an inlet port and an outlet port and a valve seat :tor each of said ports, a valve -i'or siinultaneously engaging both of said seats to close said ports, means for moving said valve transversely ot said ports into and out 'of alignment with said seats, and a lil-shaped spring between said valve and moving means normally tending to urge said valve toward said seats transversely of its opening and closing line ot' movement.

16.- in a valve, a valve gate, a valve seat having a port opening and an integral portion extending away from said opening in the direction and tor substantially the full distance of tr-avel of said gate toward or trom port closing position, means for moving said valve toward and fromport closing position, said portion having a surface adapted to conform to the whole surface ot the seat tace of the gate whereby to protect the seat face of the gate from deposits and the like when in port open position, and means for holding said seat face orn the gate against said surface when said gate is in port open position.

ae/ima@ 17. ln a valve, a valve gate, a valve seat having a port opening and a port-ion extending away from said opening in the direction and for substantially the full distance of travel of said gate toward or from. port closing position, means for moving said valve toward and from port closing position, said portion having a surface adapted to conform to the marginal edge suace of the seat face ot' the gate whereby to protect the seat surl'ace of the gate from deposits and the like when in a port open position, and resilient means for holding said seat face of the gate against said surface when said gate is in a port open position.

18. ln a valve, a valve body having a port, a valve gate having a seat face, a seat for said port and cooperative with said gate, a protective seat for said gate seat face adjacent said port and'cooperative with the entire marginal portion of said seat itace when said gate is in full port open position whereby to protect said gate seat face, and means for holding said gate seat ace in cooperative engagement with said protective seat when in. said position.

19. ln a valve, a valve body having a port, a valve gate having a seat face, a seat for said portand cooperative with said gate for closing said port, a protective seat for said gate seat face adjacent said port and cooperative with said seat face when said gate is `in a port opening vposition whereby to protect said gate seat face, and means for resiliently pressing said gate seat ace into cooperative engagement with said protective seat when in said position.

20. ln a valve, a body having inlet and outlet ports therein, a valve seat member Jfor one of said ports, a port closure member adapted to cover said seat, and means on said closure member cooperative with said seat and adjacent said seat cooperative with said closure member for moving said closure member from said seat to spac/eJ the same apart equally about their contact surfaces.

GEURGE M. KELLY.

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