US515364A - Valve-body - Google Patents

Description

(Non/10am.) 2sheets-sheet=.` F. H. RICHARDS. f

VALVE 130ml.r

Patented eb. 27, 1894 Wmzea: Inventar.' WWWMM UNITED STATES PATENT EEICE.l

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO WALTER IVOOD, OF PHILADELPHIA, PENNSYLVANIA.

VALVE-BODY.l

SPECIFICATION forming part of Letters Patent No. 515,364, dated February 27, 1893.

Application filed July 11,1892. Serial No. 439,693. (No model.)

To a/ZZ wiz/m it may concern.-

Be it known that l, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Valve Bodies, of which thefollowing is a specification.

This invention relates to that class of valvebodies used for the valves, or gates, for Io water-mains and like service, in. which the body-casting is formed with seat-bearings for supporting the brass, or other non-corrosive, seat secured thereto.

The object of my present invention is to I 5 furnish a seated valve-body of the class speciiied, having danged seat-rings expanded into engagement with the flange-bearings and rolled into a state of expansive compression, whereby the seats are securely fixed in place zo and are held against the valvebody with a force sufficient to prevent leakage; and whereby the valve-bodies may be manufactured of a more reliable quality at a greatly reduced cost,`owing to the entire absence of the machining operations heretofore required.

In the drawings accompanying and forming a part of this specification, Figure 1 is a longitudinal vertical section of a valve-body embodying my present improvements. Fig. 2 is an end elevation of the valve-body. Fig. 3 is an enlarged sectional view of one half of the valve shown in Fig. l, together with the seating-tool in place as at the close of the seating operation. Fig. Llis a plan view of the seat-blank. Fig. 5 is a sectional View of said blank. Fig. 6 is an enlarged sectional detail in isometrical perspective, of a portion of the valve-body (about full size of a twelve inch Valve), with a portion of a seat-ring secured in place and constructed in accordance with my invention.

Similar characters designate like parts in all the figures. Y

In the drawings, I have shown, for the illustration of my present invention, a valve-body of the straight-way variety, and having two oppositely-disposed seats. The valve-body is designated in a general way by C, and consists of the usual tubular casting having anv 5o open extensiomd, at one side thereof, through which the valve-gates may be inserted in a well-known manner, said extension being anged for receiving the usual bonnet that ordinarily carries the gate-actuating screw. These details, however, not appel-taining to my present invention, are not shown herein. The body-casting, C, has one or more seatbearings, E, of the general form of a perforated cross-wall. The seat-bearing proper consists of the inner surface, 92, of said wall, around the opening D therein. Theinner side of the seat-bearing, or wall, E, is flanged or ribbed as at 1l, being of the general form of a dovetail, or Aundercut, for the purpose of engaging the flange ot' the valve-seat. The valve-body in an un iinished state as it comes from the mold, as is well-known, is only apprximately regular in form, and especially on the inner' side thereof, it having undulating surfaces covered with scale and granulations such as oxide, sand, and the like. Heretofore it has been the common practice to true or iinish the seat-bearing surfaces by machining the same, and also to turn the seat-ring to secure a perfect iitsbetween the seat-ring and said surfaces.

In my present invention the undulations or roughened surfaces of the seat-bearing and seat-ring, in their natural condition, or as they come from the mold, are utilized to secure an intermeshing impingement, by embedding', through expansion, portions of the seat-ring into interstices in the bearing-faces of the seat-ring supporting-flange, which not only secures an undulating joint resistant to high-pressure, but also prevents the rotation of the seat-ring during the process of rolling and expanding said seat-ring to place.

The valveseat, designated in a general way by B, consists of the seat-ring, or disk, l2, and, extending laterally from the inner edge thereof, the flange 3. When assembling the two parts of the valve-body, said fiange 3 is inserted through the opening D, and is then subjected to a rolling operation whereby it is internally rolled and expanded into engagement with the tiange E of the seat-bearing, and into a high state of compression.

Theseat-blankshowninFigsAandisof the particular kind described and claimed in my application, Serial No. 439,692, tiled July 11, 1892; which form of seat-blank has an anchoragelange,3,whose projectingendisthickened on the inner side thereof at 3 for the purpose of supplying the metal required in the operationof rolling-in the seat-blank into the open- IOO ing D of the valve-body casting. When subjected to the rolling operation employed for inserting the seat-blank in the valve-body and for expanding said blank to form the finished valve-seat, the expander-rolls act rst upon the reinforcement-portion, 3, of said anchorage-flange, and as this is rolled down extend their action over the whole inner face of saidjiange. During the seating operation, said anchorage-fiange is gradually shifted and re-shaped from the position and form shown in Figs. 4 and 5 to those shown in Figs. 1 and 3. During the process of insertion, the seat-blank iange is expanded by subjecting the same to internal rolling carried on to the point of flowage, this being done in order to embed the lmore ductile metal of the ange upon the less ductile metal of the` 'is' described and claimed in my application,

Serial No. 439,691, iled July 1l, 1892. Said tool consists, first, in a roller-head furnished with' rollers for acting on the seat-blank disk and on the anchorage-flange thereof; and second, of devices for simultaneously driving saidrollers. rlhe roller-head consists .of the body, orroll-carrier, F, constructed to receive the-two sets of rollers, one set for rolling the face ofthe seat-blank and the other set for rollingA theA anchorage-fiange of said blank. Each of said sets consists preferably of three rolls, only one-of which is shown in the drawings'in this case. The face-roll 4 is held in place on the carrier by some suitable means, as for instance, the tubular stud 5 and the bolt 6. The expander-roll 7 is shown set in a pocket, or recess, formed in said carrier, being held in place by a cap, 9, fixed to the under side of the roll-carrier. For drivingthese rolls, a driving-sleeve, S, is provided, having at the end thereofa conical track, 10, engaging upon and between the several rolls of the first set to drive these after the manner of frietional bevel gearing. For driving the eX- pander-rolls, and also for forcing the same down during the seating operation, I use an expander-pin, P, which is formed tapering as shown, so that its point will enter between the expander-rolls when these stand together as at the beginning of the seating operation, andwill during said operation gradually force the 4rolls apart as the expander-pin is driven downward to its position in Fig. 3. `The driver S is driven from the stem, 15, of said pin?, by means of a clamping device only partiallyl shown herein and consisting of the upper end of said driver slotted at 13 and having a clamp-bolt, 14, for closing the same upon said stem 15.

The process of inserting the seat-blank carried out by means of the seating-tool hereinbefore referred to, is described and claimed in my application, Serial No. 439,689, iled July 11, 1892. According to this process, the seat-blank having been set in position against the wall E, with the anchorage-liange 3 projecting into the opening D, and the seatingtool assembled and set in place as in Fig. 3 but with the expander-pin drawn up so that its point only just enters between the expander-rolls, power is next applied to the eX- pander-pin to revolve the same together with the driver S clamped thereto, and to gradually force Vsaid pin downward during the revolution thereof to the position shown in Fig. 3. During the first partof this movement, by reason of the clamping aforesaid of the driver S upon said pin, the face-rolls 4 of the roller-head are firmly held against the face of the seat-blank, which is thereby subjected to a rolling action until firmly embedded'on the face of the wall-E. As the eXpander-pinis forced downward, it forces outward'the expander-rolls, thereby subjecting t-heanchorage-liange 3 toa heavy pressure vand rolling action,vand expanding the same within the bore D into a rigid locking engagement-with the wall E; this rolling action being carried on to the point of iiowa'ge, whereby the 'ductile metal of the iiange is forced over and into all of the undulations and granu-lations of the surface yof the bore D.

For making my improved seated valvebody, I use the castings in theroughform in which the same come fromv the foundry, only, giving -them such finishing as is usually-given to castings in the cle-anin ,r`room, consisting of the usual chipping in the ease lof the iron castings, and of the usualcle'aning of the brass castings from the molding-sand; but neither casting need be machined-or other- Wise especially prepared for use.

By utilizing the roughened surfaces of the seat-ring and seat-bearing ofthe valve-body,

I secure an undulating'joint whichis highly advantageous in resisting pressure and will greatly reduce the cost of manufacturing valve-bodies.

Having thus described my invention, I claimw The herein described valve-body, itconsisting of the body-casting, having the transverse walls with seat ring openings therein, and having in said openings the inward flanges contiguous to the inner sides of thewalls, said wall and ange surfaces-being of the described rough and unfinished undulating character, combined with seat-rings of L- shaped section having an external enlargement in locking engagement \vith the.inward anges of the valve-body walls, said engagement being made by an undulating joint of high-pressure resistance, as set forth.

FRANCIS II. RICHARDS.

Witnesses:

HENRY L. RECKARD, EMMA G. FowLER.

IOO

IIO

Images