US765430A

US765430A - Gate-valve.

Info

Publication number: US765430A
Application number: US15735903A
Authority: US
Inventors: Charles E Huxley
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-05-16
Filing date: 1903-05-16
Publication date: 1904-07-19
Anticipated expiration: 1921-07-19

Description

PATENTED JULY 19, 1904.

(LE. HUXLEY.

GATE VALVE.

APPLIOATION FILED MAY 16, 1903.

N0 MODEL.

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UNITED STATES Patented J'u1y'19, 1904.

CHARLES E. HUXLEY, OF CHICAGO, ILLINOIS.

GATE-VALVE.

SPECIFICATION forming part of Letters Patent No. 765,430, dated July 19, 1904.

Application filed May16, 1903. Serial No. 157,359. \No model.)

To all whom, to may concern.-

Be it known that I, CHARLES E. HUXLEY, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Gate-Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to an improvement in valves, and refers more specifically to arenewable seat-ring or member designed for use with gate-valves and the manner of fastening the same in the casing and also to a bushing for the valve-stem which is capable of application to other forms of valves.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a central vertical section of a gate-valve, showing my invention applied thereto. Fig. 2 is a perspective view of one of the seat-rings of said valve. Fig. 3 is a fragmentary View of the valvecasing, showing a modification. Fig. 4 is a view, partly in section and partly in elevation, of a globe-valve containing one of the features of my invention.

As shown in the drawings, A designates the casing or shell of a gate-valve, provided with an inlet branch A and an exit branch A A design ates the neck of the valve, to which the usual bonnet A* is attached, the lower end of said bonnet being interiorly screw-threaded to fit over the exteriorly-screw-threaded neck.

B designates the valve gate or closure, which is located in the casing between the branches A A and engages when seated seats at the inner ends of the branches. The gate is adapted to be lifted or drawn upwardly into the neck A by means of a rotative endwise-immovable screw-shaft which extends upwardly through the neck and has screw-threaded engagement with the gate, as shown in Fig. 1.

C C designate my improved seat rings, against the inner margin of which the gate or closure seats. As herein shown, two of such seat-rings are employed, one at each side of the gate; but, if desired, a single removable seat-ring may be employedthat at the ind uction side of the valve. Said rings are made substantially alike, each consisting of a ring member 0, formed on its inner side to provide a seat 0, against which the gate seats. The outer margin of each ring member is provided with an exteriorly-tapered or wedge surface 0 which bears against an opposing annular inwardly-facing tapered wedge-surface a at the inner end of the adjacent or associated branch. The ring members 0 of the seat-rings are provided at their lower sides with lugs 0 which are designed to enter pockets A formed in the lower side wall of the valve-casing just below the branches. The inner walls a of said pockets are tapered, and the inner faces of the lugs or extensions 0 of the seat-rings are correspondingly tapered and are adapted to bear against said tapered surfaces a. When inserting and fastening the rings in place, said rings are dropped downwardly through the neck A which is made large enough to receive the same, with said lugs or extensions 0 entering the pockets A above referred to. VVh'en each ring is first dropped into the easing, (which of course is before the gate is in place,) the upper side thereof is inclined toward the center of the valve-casing with the tapered inner face of the lug a engaging the inclined inner wall of the pocket and the lower part of the tapered ring member extending into the lower side of the adjacent branch. The ring is thereafter swung laterally toward the adjacent branch, and by reason of the taper of the outer margin of the ring member 0, which reduces the diameter of said outer margin of the ring, said outer margin readily enters the opening at the inner end of the branch, so as to bring the wedge surfaces (2 and a, respectively, of the ring and the branch into contact, and thereby provide a joint between the ring and easing.

Any suitable means may be employed for forcing and locking the seat-rings in place. The means herein shown consists of a ring D, located inside the neck A and having exterior screw-threads adapted to engage interior screw-threads in the neck. Said ring is provided on its lower margin with an exterior tapered surface d, adapted to engage corresponding and opposing inclined surfaces on lugs or extensions 0' at the upper side of the seat-rings, as clearly shown in Fig. 1, said coacting inclined or wedge parts being con structed to force the upper parts of the seatring toward the wall of the casing. By reason of the fulcrum afforded said rings by engagement of the lugs or extensions 0 at the lower sides of said rings with the inclined walls of the pockets A outward or lateral pressure exerted against thelugs c at the upper sides of the rings acts to force the tapered outer margins of said rings into close contact with the tapered surfaces at the inner ends of the branches and affords fluid-tight joints between said parts.

I have herein shown both sides of the valve as provided with the seat-ring G, both being held in place by the same locking-ring 1). I may employ, however, but a single removable and renewable seat-ring and locate the same at the induction side of the valve, and ordinarily this will be sufficient, as under usual conditions it is only this side of the valve which needs to be closely packed. The side of the gate or closure facing the inlet branch A is made vertically flat, while the opposite side of the gate is tapered and the associated seat-ring C is correspondingly tapered. If the seat-ring be omitted on the tapered side of the gate, said tapered side of the gate will bear against a correspondingly tapered seat formed on the metal wall of the casing surrounding the branch A Said wedge-shaped parts of the gate and easing act to force the opposite side of the gate in close-fitting engagement with the seat-ring C at the induction side of the valve. If desired, both sides of the gate may be tapered.

When the ring C is worn or has otherwise become disabled, it may be readily removed by first removing the bonnet and unscrewing the ring D, whereupon the seat-ring is made easy of access to be removed from the casing.

In some instances the pocket or pockets A may be formed between the side walls of the casing and a removable or separate block A,- (shown in Fig. 3,) having tapered outer ends a", which constitute the inner walls of said pockets. In this construction the lower sides of the rings are forced outwardly by forcing upwardly said block, which is accomplished by set-screws A extending upwardly through the lower wall of the casing and impinging against the lower side of said block. hen said block is thus forced imwardly,the tapered ends thereof engage the tapered faces of the lugs c and act to force or spread the same outwardly, and thereby force or hold the lower side of the ring in close contact with the tapered inner surfaces of the branches. I

The rotative valve stem or shaft B1 extends upwardly through a bushing E, located within the bonnet A", and with which bushing said stem or shaft has bearing. Said bushing conveaaso forms exteriorly to the interior shape of the bonnet and is provided at its lower end with an integral radial flange E, which extends outwardly and is clamped between the upper margin of the neck A and internal downwardly-facing shoulder in the bonnet. The shaft or stem is provided near its upper end with an annular radial flange b, which is in terposed between a downwardly-facing internal shoulder a in the bonnet and the upper face or margin of the upper end of said bushing E. The interposition of said stem-flange between said opposing shoulders holds the stem or shaft from endwise movement and at the same time permits said shaft to freely turn or rotate. The shaft extends outwardly through a cap A which closes the upper end of said bonnet and has screw-threaded engagement therewith and is provided at its upper end with the usual hand-wheel for rotating the shaft. Between said shaft and the part of the bonnet between the outer end thereof and said flange a is placed an annular body of packing, which is held in place by means of a gland A", which isheld in place by said screw-cap A The lower side of the flange E of said bushing is provided with a depending flange c, which fits closely within the upper open end of the neck The purpose of said flange is to prevent the upper margin of the neck from being distorted or pressed inwardly when the bonnet is turned down in place. The screw-threads of the meeting ends of said parts are usully slightly tapered, so that when the parts are turned tightly together the outer surrounding part or flange of the bonnet exerts such stress on the neck as to tend to force the upper margin of the neck inwardly and contract the same. As a result of such distortionthe area of contact between the screw-threads is lessened,.with a result of weakening the joints between the neck and bonnet. Moreover, such contraction of the neck prevents the ready with drawal of the locking-ring D whenits removal is desired. The presence of the flange a on the lower end of the bushing supports the upper end of the neck against such stress and prevents distortion of the same. This last-- described feature of my inventionto wit. the depending flange on the lower end of the bushingis applicable for use in a globevalve--such, for instance,as shown in my prior application for United States Letters Patent, Serial No. 148,685, filed March 20, 1908, and as also illustrated in Fig. 4:. As shown in said Fig. 4, F designates a bushing Which corresponds with the bushing E hereinabove described. Said bushing F is located Within a bonnet G, which has screw-threaded connection with the neck H of the valve-casing H and provided with an integral flange f, which is clamped between the upper end of the neck and an internal shoulder in said bonnet. The valve disk or closure I is in this instance moved toward and from its seat t by means of a screw-threaded stem I, to the lower end of which said closure is attached and which stem has screw-threaded engagement with said bushing. The bushing is provided at its lower end with a depending integral flange f, which fits within the open end of the neck and supports the upper end of the neck from inward distortion when the bonnet is turned down home in the same manner as does the similar construction shown in Fig. 1. In the construction shown in said Fig. 4E contraction of the open end of the neck prevents the valve disk or closure from being removed from the casing through the neck the same as such a contraction of the neck of the casing shown in Fig. 1 would prevent the ready removal of the locking-ring D.

It will of course be understood that the position of the valves may be changed from that illustrated, depending upon the direction of the pipe-line in which the valves or either of them may be included. The reference to the horizontal and vertical relation of the parts of the valves are therefore tobe regarded as employed only for the sake of convenient reference to the parts illustrated.

I claim as my invention 1. In a gate-valve, the combination with the casing and its tubular branch provided at its inner end with an annular tapered surface, of a seat-ring having an exterior tapered surface adapted to enter and engage the tapered surface of the branch; said seat-ring having wedging engagement at its lower side with the casing and a part having screw-threaded engagement with the casing and wedging engagement with the upper side of the seat-ring.

2. In a gate-valve the combination with the casing and its tubular branch, of a seat-ring at the inner end of the branch having tapered or wedging engagement therewith, and formed at its inner side to constitute a seat, and a wedge-shaped lockingring having screwthreaded engagement with the neck of the valve-casing for locking the seat-ring in place.

3. In a gate-valve the combination with the casing and its tubular branch, of a seat-ring at the inner end of the branch having an exteriorly-tapered outer margin adapted to enter and engage the interiorly-tapered inner end of the branch, and formed on its inner side to constitute a seat, a part at the lower side of said seat-ring adapted to enter apocket formed in the casing, and a locking-ring having screw threaded engagement with the valve-casing and provided on its lower margin with a tapered or wedge surface adapted to engage a corresponding surface at the upper side of said seat-ring.

4. In a gate-valve the combination with the casing and its tubular branch, of a seat-ring having an exteriorly-tapered outer margin which fits within the interiorly-tapered part of the inner end of the branch and is formed at its inner side to constitute a seat, a lug on the lower side of the seat-ring adapted to engage a tapered abutment in the lower part of the casing, and a locking-ring having screwthreaded engagement with the casing and provided with a tapered lower margin adapted to engage a corresponding tapered surface on a lug projecting from the upper side of said seat-ring.

5. In a gate-valve the combination with the casing and its tubular branch, of a seat-ring at the inner end of the branch having an exteriorly-tapered outer margin adapted to enter and engage the exteriorly-tapered inner end of the branch and formed at its inner side to constitute a valve-seat, a lug on the lower side of said ring, a block in the lower part of the casing having a tapered or wedge-shaped end adapted to engage said ring-lug, and means acting on the block for forcing the wedgeshaped end thereof against said lug.

6. In a gate-valve, the combination with the casing and the tubular induction and eduction branches thereof, of seat-rings at the inner ends of the branches provided with tapered outer margins which are adapted to engage corresponding tapered surfaces at the inner ends of the branches; said seat-rings having wedging engagement at their lower sides with the casing, and a locking device having screwthreaded engagement with the casing and wedging engagement with the upper sides of both seat-rings.

7. In a gate-valve the combination with the casing and its tubular induction and eduction branches, of seat-rings at the inner ends of said branches having tapered or wedging engagementtherewith and a wedge-shape locking-ring having screw-threaded engagement with the neck of the valve-casing for locking both of said seat-rings in place.

8. As a new article of manufacture, a valveseat ring formed on one side to constitute a valve-seat and exteriorly tapered on its other margin and lugs on the opposite sides of said ring, the upper lug being provided on its inner face with a tapered or wedge surface.

9. The combination with a valve-casing provided with a tubular neck, a seat, a closure engaging said seat, a rotative stem attached to said closure and extending outwardly through said neck and a bonnet having exteriorly-screw-threaded engagement with the outer end of said neck, of a bushing in said bonnet with which the stem has rotative engagement and a curved flange on the lower end of said bushing which enters the upper end of said neck and supports it from inward distortion. i

10. The combination with a valve-casing provided with a'neck, a seat,-a closure engaging said seat, a rotative stem attached to said closure and extending outwardly through said neck and a bonnet having exteriorly-screwthreaded engagement with the outer end of said neck, of a bushing in said bonnet with my invention I aflix my signature, in presence which the stem has Totative engagement, a "of two witnesses, this 12th day of May, A. D. IO radial flange on said bushing which is clamped 1903. between said neck and bonnet and a curved *1 i 5 flange in the lower end of the bushing which CHARLES E enters the upper end of said neck and supports Witnesses: it from inward distortion. \VILLIAM L. HALL, In testimony that I claim the foregoing as GERTRUDE BRYCE.