US1905638A - Valve seat - Google Patents

Description

A ril 25, 1933. P. D. HUSHOUR VALVE SEAT Filed Dec. 17, 1929 2 Sheets-Sheet 1 1 J I I o/fl INVENTOR April 5, 1933- P. D. HUSHOUR VALVE SEAT 1929 2 Sheets-Sheet 2 Filed Dec.' 17

R O T N E V m Patented A r. 25, 1933 UNITED STATES PATENT; OFFICE PERRY ID. HUSHOUR, OF YOUNGSTOWN, OHIO, ASSIGNOR TO WALTER M. OF YOUNGSTOWN, OHIO VALVE SEAT Application filed December 17, 1929. Serial No. 414,707.

The present invention relates broadly to the art of fluid distribution and control, and more particularly to a seat for valve strucfor open hearth furnace sewers. Such seats have been formed in the past eitherby casting or welding structural plates together in order to form a comparatively large passageway for the circulation of cooling water. Such structures necessarily provide portions ofwidely different cross sectional areas in the path of water circulation. As a result, the water flowing therethrough is subjected to changes in velocity. Each time the velocity of flow decreases to any appreciable extent, there is a tendency to deposit dirt, sludge, and other foreign matter which may have been in the water stream. This results, in a comparatively short time, in an appreciable accumulation on the inside of the seat, usually more or less localized. Such accumulation forms a good insulator and does not permit heat to be taken away as rapidly from such insulated portion as from the remaining portions. This necessarily causes uneven expansion and contraction in the valve seat and consequent cracking or warping thereof. In accordance with the present invention, there is provided an improved construction possessing not only desirable attributes from the standpoint of simplicity, cost, and relatively light weight, but also from the standpoint of ability to provide effective and. substantially uniform water cooling throughout all portions thereof. When it is considered that in the open hearth practice, the sewers are called upon to handle gases well above 2006" F., the necessity for efiicient and uniform water. cooling will be appreciated.

In the accompanying drawings there are illustrated certain preferred forms of my invention.

In the drawings:

seat itself,

structure illustrated in Figure Figure 3 is a side elevational .view showing gagement with a valve, and

tures of the character utilized, for example,

Figure 1 is a front elevational view of the,

f l "keeps a smooth inside wall as well as a flow Figure 2 is aside elevational view of the Figure 4 is a view similar to Figure l, illustrating a modified embodiment of the invention.

In accordance with the embodiment of the invention illustrated in Figures 1, 2 and 3 of the drawings, the seat comprises an inner substantially paddle shaped or looped portion 2 with an outer portion 3 similarly shaped and substantially uniformly spaced therefrom throughout the entire periphery. As will be readily apparent from Figure 2 of the drawings', the inner and outer portions lie in sub stantially the same plane throughout the entire length. The inner portion is provided with an open end 4 serving as an inlet through which cooling fluid may be admitted. This cooling fluid flows completely down one side of the inner portion, across the bottom, and up the opposite side in the direction'indicated by the arrows- By means of a return bend portion 5 it is conducted downwardly throu h the outer portion, across the bottom, and then upwardly on the opposite side tothe outlet 6.

It will be apparent to those skilled in the art that the entire seat structure may be formed from a continuous length of pipe, or may be formed from any desired number of sections suitably joined together. In order, however, to maintain an internal diameter as nearly constant as possible, I pref- B0 erably use a'construction as illustrated in detail in Figure 1, in which the entire bottom halfof the seat comprises a separable section welded to the upper section at each of'the points W. This welding. is conveniently accomplished by tapering the adjacent ends of the tube, as indicated in Figure 1, whereby a seat for thebuilding up of the welding material is provided.

In like manner, the return bend is prefer- "ably welded in position in a 'similar'manner, as will likewise beapparent from Figure 1.

tions of the seat in prope ly pa ed e i nship, there may be provided spacers 7 at .any deslred number of points, one arrangement of which is illustrated in the drawings. In

accordance with this embodiment a spacer is provided adjacent each welded joint to assist in reinforcing the same.

In Figure 3 the seat is illustrated in inclined position across a sewer or other conduit S, a gate valve being illustrated in cooperative relation thereto and in partial conduit-closing position.

It will be understood that the seat having been formed in any desired manner, either from sections or from a continuous piece of material, and by means either of welding or coupling, the space between the inner and outer portions may be filled with suitable fire resisting material preferably of a refractory nature, and conveniently in the 'form of bricks adapted to lie substantially flush at least with the seating surface of the pipes forming the seat.

Not only does a construction of the char-' acter herein described insure uniform flow velocity of the cooling medium with a consequent minimum deposit of any foreign material, but it provides relatively small surfaces. While small surfaces are not as desirable from the standpoint of heat transfer as are large surfaces such as would be provided by seats such as formed from plates, they are decidedly more advantageous than large surfaces from the standpoint of possible difiiculties of operation. It sometimes happens, for example, that there is a tem; porary cessation of the supply of cooling medium. In such cases it is obvious that the associated parts, but also the gate itself and the refractory work adjacent thereto. While metallic parts necessarily soon run dry. Thereafter, the supply of cooling water may be resumed, and the cooled water brought into contact with the heated metal which defines the cooling chamber. This sudden contact between the cool water and the hot metal causes the water to explode or flash into steam, with the consequent generation of tremendous pressures sufiicient in many cases to break not only the gate seat and its this obviously requires at least a temporary shut down, such shut downs are of minor importance compared to the possible loss of life of worlnnen employed on or about the furnace. By the use of a relatively small surface of the character herein illustrated. it will be apparent that the possibility of such an explosion is minimized.

The construction is also highly desirable from the standpoint of the type of cooling which is efi'ected. It will be apparent that at the inlet 4, for example, there is the coollest water, while at the outlet 6 there is the hottest water. Assuming incoming water at 'a temperature of and outgoing water at a temperature, merely by way of example, of

average temperature so that the same condition is true at this point also. Thus there is secured substantially uniform cooling throughout the entire periphery of the seat. This is highly desirable from the standpoint of maintaining a true seating surface.

Many of the same advantages are obtainable with the form of my invention illustrated in Figure 4, in which figure parts corresponding to parts already described are designated by t e same reference characters having a prime aflixed thereto. This form of the invention is especially adaptable where it is desired to provide a seat for round conduits. As illustrated, the seat comprises a continuous length of ipe shaped to provide an inlet 4' with an out et 6'. The intermediate portions of the pipe are shaped to provide an outer loop 3' and an inner loop 2, spacing means 7' being provided at suitable points as desired.

At the point 8 where the two loops pass over each other, the pipe is offset, as illustrated in the drawings, whereby the major portions of the opposite side of the seat from that viewed in Figure 4 will all lie in a substantially common plane. A

While in all cases the inner and outer loops are preferred, due to the fact that they afford an increased bearing surface for a valve and also define a zone in which refractory material may be located, it will be apparent thatsome of the advantages of the invention maiy be obtained by the use of a single loop on y. I I

While I have herein referred-specifically to an open hearth sewer, and to a valve seat for use in connection with such sewer, it I will be understood that the utility of the invention is not limited with respect to its particular manner of use, but that changes may be made in the construction, use and operation thereof without departing either from the spirit of the invention or the scope of the appended claims.

I claim:

1. As an article of manufacture, a seat comprlsinga pair of water cooled portions.

looped portion lying substantially in the plane thereof but freely spaced therefrom through an air ga and means for water coolin both of sai members, said members being lnterconnected at a common point to provide a continuous flow ath for cooling medium therethrough, and being adapted to directly engage a valve.

5. As an article of manufacture, a seat comprising an inner looped portion, an outer looped portion lying substantiall in the plane thereof but freely spaced t erefrom through an air gap, and means for water cooling both of said members, there being separated spacing means for maintaining said 1nner and outer members in predetermined spaced relation. I v I 6. As an article of manufacture, a seat comprising a substantially paddle shaped inner member, a substantially paddle shaped outer member, said members having the paddle portions thereof lying in a substantially common plane and being disconnected throughout the major portions of their lengths, and means for water cooling said members.

7 As an article of manufacture, a seat comprising a substantially paddle shaped inner member, a substantially paddle shaped outer member, said members having the paddle portions thereof lying in a substantially common-plane, and means for water cooling said members, there being separated means for maintaining said members in predetermined spaced relationship.

8. As an article of manufacture, a seat comprisinga substantially paddle shaped inner member, a substantially paddle shaped outer member, said members having the paddle portions thereof freely spaced one from the other and lying in a substantially common plane, and means for water cooling said members, each of said members comprising'a plurality of sections in end to and welded relationship.

9. As an article of manufacture, a seat com prising a substantially paddle shaped inner member, a substantially paddle shaped outer member, said members havingthe paddle portions thereof freely spaced one from the other and lying m a substantially common plane,

and means for water cooling. said members,

each of said members comprising av plurality of sections joined together to maintain a flow path of substantially constant cross sectional area therethrough.

10. As an article of manufacture, a seat comprising an inner pipe member, an outer pipe member lyin substantially in the plane thereof, but space from the inner pipe member throughout its entire peri hery, and separated spacing means intermediate said members and lying substantially in the plane thereof.

11. As an article of manufacture, a seat comprisin an inner pipe member, an outer plpe mem r lying su stantially in the plane thereof, but spaced from the inner ipe member throughout its entire perip ery, and

spacing means intermediate said members and lying substantially in the plane thereof,

said members each comprising a plurality of sections with separated spacing means located adjacent the points of connection of the re spective sections.

In testimony whereof I have hereunto set my hand.

PERRY D. HUSHOUR.

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