US826276A

US826276A - Stop-valve for steam and other fluids.

Info

Publication number: US826276A
Authority: US
Inventors: James Robinson
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-12-15
Filing date: 1905-12-15
Publication date: 1906-07-17
Anticipated expiration: 1923-07-17

Description

No; 326,276. y PATENTBD JULY 1v, 190s.

J. ROBINSON.

STOP VALVE POR STEAM AND OTHER FLUIDS.

APPLICATION FILED DBO.1 1905.

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JAMES ROBINSON, OF LEEDS, ENGLND. STOP-VALVE FOR STEAM ANYD OTHER FLUIDS.

Specification of Letters Patent.

Patented July 17, 1906.

Application led December 15, 1905. Serial No. 291.816.

tight, especially when used for high-pressure steam, Owing to the scoring or cutting action of the steam upon the working faces of the valves which takes place when the said valves are just being opened and closed.

Now the object of this invention is to construct or arrange a stop-valve in such a manner as to entirely obviate the disadvantage above referred to.

To this end my invention broadly consists in employing a valve-body of similar construction to that of an ordinary globevalve and providing the valve-spindle with an inverted-cup-shaped or other valve adapted to engage with a corresponding tapered circular passage formed in the center of the internal partition of the valve-body, the said valve being so arranged that when drawn upward by the valve-spindle a fluidtight joint is made between the valve and the walls of the circular passage, while below the valve is employed a iiexibly-mounted cup-shaped or other shield adapted to receive thevalve on the same being lowered, the said shield being so arranged that its rim orupper edge engages a seating on the under side of the internal partition around the central circular passage, so as to protect the working face of the valve against the action of the steam.

In order that my invention may be clearly understood, I will proceed to describe the same with reference to the example shown in the accompanying drawings, in which similar numbers of reference indicate like parts in all the figures, wherein` Figures 1, 2, and 3 are each sectional side elevations of my improved stop-valve, illustrating, respectively, the valve and its shield in the closed position, the valve moved down within its shield, and the valve and its shield moved down into the fully-opened position.

In the drawings, 1 is the valve-body, provided with a head 2, through which is passed the valve-spindle 3, formed with a left-handscrew-thread and being provided with a handcircular passage 9 wheel 4, while the bottom of the valve-body l is fitted with a detachable cover 5.

6 is the partition formed within the' valvebody 1, between the inlet 7 and the outlet 8,

while through the center of the partition 6 a tapered circular passage 9 is formed, having the widest part of its taper facing downward.

10 is the valve proper, of inverted-cup formation, formed integrally with the valvespindle 3, which valve 10 is made of such a taper externally that when it is drawn upward by means ofthe valve-spindle 3 into the tapered passage 9 a fluid-tight joint will be made between the said valve 10 and the wall of the said passage 9. Below the valve 10 is a cup-shaped shield 11, provided with a circular base-stem 12, adapted to slide vertically within a circular recess 13, formed in the bottom cover 5, which shield 11 is normally held up by means of a spiral spring 14 with its rim engaging a seating 15, surrounding the circular passage 9, so that a fluid-tight joint is made between the rim of the cup-shaped shield 11 and its seating 15.

In Fig. 1 the stop-valve is shown with its operating parts in the closed position, the cup-valve 10 being drawn tight into the circular passage 9 and the held in the up position by the spring 141 tight against the seating 15, and it will be observed that both the valve 10 and the shield 11 are arranged to open against the fluidpressure, and that suc'h pressure acting on the back of the shield 11 will when the valve 10 is closed keep the said shield 11 hard up' to its seat 15.

In opening the valve by rotating the valvespindle 3 the cup-valve l0 is first traveled down into the shield when by the continued rotation of the spindle 3 the shield 11 is forced from its seating 15 and traveled down simultaneously with the valve 10 into the position shown at Fig. 3, thus allowing the fluid to rush through the without doing damage to the wall of the said passage 9 or to the external face of the cup-valve 10, the latter being now sheltered within the protecting-shield 11. When the valve is being closed, the reverse action takes place-that is to say, the shield 11 first comes to rest on its seat 15 and cuts off the rush of fluid through the circular passage 9 before the cup-valve 10 commences to leave the shelter ofthe shield 11.

Should any difficulty be experienced in 11, as shown at Fig. 2,

cup-shaped shield 11 ICO reg

IIC

' when the valve is closed, so that in the latter in the bottom cover 5 for allowing any condensed fluid to escape from beneath the basestem 12 cf the shield 11.

When the stop-valve is used with hot fluids, the valve-spindle 3 will be liable to eX pand when the valve is open and contract case the tendency will be to draw the cupvalve 10 farther into the circular passage 9 and render the valve more secure against leakage.

In large valves the cup-valve 10 instead of being formed integrally with the valve-spindle 3, as shown, may be flexibly attached to the valve-spindle 3 in order to insure the said valve 10 making a true 'lit with the wall of the passage 9.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A stop-valve for steam and other fluids, comprising in combination a valve-body having an internal partition formed with a tapered circular passage, a valve-spindle carrying a tapered circular valve adapted to engage within the corresponding tapered passage in the internal partition, and a circular shield flexibly mounted in the valve-body with its rim engaging a seatingformed on the internal partition around the circular passage, said shield being adapted to first receive the valve prior to being carried off its seating on the valve being opened and first to come to rest on its seating on the valve being closed, substantially as set forth.

2. A stop-valve for steam and other fiuids, comprising in combination a valve-body having an internal partition formed with a tapered circular passage, a valve-spindle carrying an inverted-cup-shaped valve adapted to engage within the corresponding tapered circular passage in the internal partition, and a cup-shaped shield located below the valve and being flexibly mounted in the valvebody with its rim or upper edge engaging a seating formed on the under side of the internal partition around the circular passage, said shield being adapted to first receive the valve prior to being carried off its seating on the valve being traveled downward and first to lcome to rest on its seating on the valve being traveled upward, substantially as set forth.

3. In a stop-valve for steam and other fluids, the combination with the valve-body 1 having an internal partition 6 formed with a tapered circular passage 9, of a valve-spindle 3 carrying an inverted-cup-shaped valve 10 adapted to engage within the circular passage 9 of the' internal partition 6, and a flexibly-mounted cup-shaped shield 11 for the valve 10 adapted to engage a seating 15 formed on the internal partition 6 of the valve-body 1, substantially as and for the purposes set forth.

In witness whereof l have hereunto set my hand in the presence of two witnesses.

JAMES ROBINSON.

Witnesses JOHN JowETT, Crnis. GILLIARD.