US1714398A - Valve case and the method of producing the same - Google Patents

Description

y 1929. w. A. OBANNON 1,714,398

VALVE CA SE- AND THE METHOD OF PRODUCING THE SAME Filed May 5,. .1928

Patented May 21, 1929.

UNITED STAT S wanna a. OZBANNON, or runsa, oxmnoua, 516mm LSA. oxnmona. I

i 'fi q'numon VALVE CASE arm 'rnn'ua'rnon or rnomicmo rim sans.

' Original application am m 18, 1921, Serial in. 192,370. Illivided and um application flledmy a, I

. v ma. Serial acumen.

This invention relates to a valve case and the method of roducing the same, and comprises a division of my application for working barrelfiled May 18, 1927, Serial This invention relates to a class of valves used in oil pumping operations where very hi h pressures. are resent and the case is adfi ted for use eit er as a standing or a wor 'ng valve. In this type of valve the ball member is usually confined within a cage or crown and is capable of more or less movement laterally thereof in its seating and unseating movement incident to the II pumping operation wherein the direction of ressure is changed. Under such conditions it is highly important that the valve member or ball be accurately guided toward and from its seat'to prevent improper seating and consequent leakage, and such guiding means must be constructed .to-permit the maximum flow of liquid to pass the valve when in its raised position. F

It is furthermore essential that the valve 2 be limited in its upward travel by a stop bar which must be so disposed as not to interfere with the unrestricted flow of liquid through the valve case. The case for such a valve differs from the usual crown or cage with side discharge openings in that the entire flow must be through the valve case in a practically direct path to the connecting 1 e; p lhis invention provides a novel construc tion of the valve case formed at its lower portion with a series of longitudinal ribs aving radial contact faces extending from a valve seat and terminating at a. point below a transverse stop bar disposed to limit the opening travel of the valve. The chamber surrounding this bar has deflecting walls at its upper end so that the circumferential current of liquid passing upward through the spaces between the ribs has a free passage about this bar and is then directed into a solid stream enteringthe outlet pipe.

The invention also contemplates the production of this improved valve case by a novel method of manufacture consisting in casting a tubular body with interiorly extending ribs and machiningor finishing the contact face of said ribs to provide a guide Th surface of substantially the diameter of the cooperating valve member.

The invention has .for an object to provide a novel and improved construction of valve case having coupling connections at its 0 I posite ends and inwardly extending gui e ribs spaced from and terminating beneath a transverse stop bar with the inner walls of the case above said bar inwardly deflected to merge a circumferential stream of liquid into a solid body at the outlet from the case.

A further object of the invention is to provide a novel method of producing a valve of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawing:

Fig. 1 is a central vertical section through the valve case with a part in elevation;

Fig. 2. is a top plan;

Fig. 3 is a section on line 3-3 of Fig. 1:

Fig. 4 is a similar view on line 4-4 0 Fig. 1; and

Fig. 5 is a detail section of one valve rib.

Like numerals refer to like parts in the several figures of the drawing.

In the various applications of the case the coupling connections are varied, for instance, 1nits use as a'traveling valve or a standing valve, and in the present instance it is shown as a standing valve.

The case 10 is formed at its upper end with an interiorly threaded opening 11 for coupling to a suitable conduit and at its opposite end with an enlarged threaded opening 12 adapted to receive an inlet connection which also supports a valve seat 13, indicated by dotted lines in Fig. 1.

This seat engages an interior flange 14 at the lower portion of the case andfrom this flange a series of longitudinally extending ribs 15 project radially inward of the case. e inner or contact face 16 of these ribs is finished to provide an accurate and smooth contact with a ball member 17, indicated by dotted lines in Fig. 1. The upper ends of these ribs are beveled, as at 18, and they terminate beneath a transverse stop bar 19 disposed in the chamber 20 and is spaced above the beveled ends of the ribs. This bar is cast integral with the case and the upper wall of the chamber above the bar is inclined inwardly, as at 21, to deflect the cirr lmfv' ntially rising current of fluid into a solid body at the outlet connection 11. This provides for a free and maximum flow of liquid directly through the case and about the valve when in unseated position.

To facilitate the production of the valve case by a casting operation and the subsequent removal of the pattern, one wall 25 of the ribs is formed straight and the opposite wall 23 inclined while the spaces between these walls form circumferential channels about the ball member guided by the ribs. The ribs are preferably initially molded with an apex, as shown in Fig. 5, and this apex is subsequently removed by a finishing or grinding operation which provides the contact face of the rib having a slight concavity substantially corresponding to the spherical contour of the ball valve.

In the method of producing these castings they may be formed from steel, in which event it is desirable to subject them to a pickling operation in order to remove the core sand before the machining of the ribs and to reduce the tool expense in the production of the complete case. By this method of production the valve case is provided with ribs which accurately guide the valve therein and thus materially reduce the wear upon the ball and seat as well as the loss due to leakage of liquid passing the valve when not pro erly seated.

e construction of the case provides for the maximum flow of fluid therethrough in a direct stream which is merged from its circumferential path about the ball valve into a solid body at the discharge and such result is facilitated by the spacing of the ribs below the stop bar to provide a clear chamber surrounding the same having its upper wall inclined toward the outlet.

While the specific details of the construction have been shown and described, the invention is not confined thereto as changes and alterations may be made without departing from the spirit of the invention, as defined by the following claims.

What I claim is:

l. A well pump fitting comprising a tubular valve casing having at one end a valve seat, a valve member coaeting with said seat, guide ribs extending longitudinally of said casing and terminating intermediate the length of the fitting, and stop means for limiting the movement of the valve member away rom its seat, said stop means being disposed adjacent the ends of the guide ribs at a point spaced therefrom less than the diameter of said valve member, the walls of the casing tapering inwardly beyond the stop means.

2. A well pump fitting comprising a valve easing, said casing being provided with a reduced discharge passage, a valve seat at one end, a valve seat at the other end. a valve member adapted to coact with said valve seat, guide ribs extending longitudinally of the casing and terminating at a point spaced from the reduced discharge passage, and stop means also disposed in spaced relation to the reduced discharge passage and at a point to prevent movement of the valve member beyond the guide ribs.

3. The method of forming a valve case consisting in casting a tubular body with spaced interiorly extending ribs, and finishing the free inner edges of said ribs to form a guide surface of substantially the diameter of the cooperating valve member.

4. The method of forming a valve case consisting in casting a tubular body with interiorly extending ribs each provided with an apex, and removing the apex of said ribs to form a finished curved contact face for a cooperating ball member.

In testimony whereof I afiix my signature.

WALTER A. OBANNON.

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