US828981A - Valve. - Google Patents

Description

No. 828,881. PATENTED AUG. 21, 1808.

' W. I. SMA?.

VALVE.

APPLICATION FILED JULYG, 1905.

. wrrNassEs: J6 I lNvaN'roR ATTORNEYS y T' I l l Wclwliacyf screws into the internally-upstanding nnTTnn sTATns PATENT @WWE 'WERNER I. STAAF, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO PITTSBURGH GAGE AND SUPPLY COMPANY, OF PITTSBURGH PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

VALVE.

Specification of Letters Patent,

Patented Aug. 21, 1906.

Application led July 6, 1905. Serial No. 268.331.

To all 1071/0771/ it 'mw/ U concern.'

Be it known that I, WERNER I. STAAF, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Valves, of which the following is a specification.

My invention relates to valves, and has especial reference to valves of such a construction that they automatically maintain their seats and the surfacesl of the valves proper which contact with the seats free from all foreign matter, whereby the rapid and irregular wearing of said seats and contacting surfaces is prevented.

Referring to the drawings which form a part of this specification, Figure l is a vertical longitudinal section of my invention, F ig. 2, a side elevation of the two sections of the valve proper, and Eig. 3 a bottom view of the valve proper.

Although my improvement is adapted for use in any style of valve, I have shown it in connection with a globe-valve having the diaphragm I, which contains the valve-opening 2, and is provided on its upper side with the annular valve-seat 3. The surface of this seat lies in a plane parallel to the longitudinal axes of the valve-casing or at a right angle to the valve-stem.

4 represents a cap or bonnet which is screwed into the valve-casing directly above the valve-seat. The bonnet is provided with the externally-threaded flange 5, which flange 6 on the top of the valve-casing. The top of the flange 6 has the two beveled portions 7 and 8, the former extending from the top outwardly and the latter from the top inwardly, so as to provide a double-inclined top portion on the flange 6 running entirely around the same. The bonnet is provided with the outward-extending rib or flange 9, which has on the portion directly above the inclines 7 and 8 corresponding inclines l0 and 11, which when the bonnet is screwed down tight on the flange 6 accurately fits on the inclines 7 and 8 and provides steamtight joint. By providing the two inclines on the flange 6 and the bonnet 4 there is no tendency when screwing down the flange to pull the flange 6 inwardly, so as to grip the threads on the bonnet with such a degree of force as to make it difficult to unscrew the bonnet.

It has been proposed to provide the flange 6 with only the outer incline and the bonn et with only the corresponding incline; but this has proven impracticable, because it has been almost impossible to turn out the bonnet, owing to the inclines bending or swagging in the-flange against the threads of the bonnet.

The valve-stein 12 extends axially through the bonnet and in axial alinement with the center of the valve-seat 3. The stem is moved up and down by means of screwthreads thereon cooperating with threads in the bonnet. The upper end of the bonnet is provided with a stufling-box 13 and nut 14.

The valve proper7 16, is swiveled on the lower end of the valve-stein by means of the head l5, which is confined within a cavity on the upper side of the valve proper, 16, by means of the threaded ring 17in the usual manner.

The ring 17 has on its upper surface the annular rib 18, which when the valve-stem is at its uppermost limit contacts with the under side of the bonnet around the stem and prevents the escape of steam past the stem, thus permitting the stuffing-box to be repacked while the valve is wide open.

The valve proper, I6, has the annular ring portion 19, whose lower surface is ground or machined to accurately fit the valve-seat 3. This ring extends outwardly to the outer edge of the valve-seat, so that as the valveseat or the under surface of the ring is ground there will be no annular recess cut in either, as would be the case if the valve-seat were conical. The lower end of the valve I6 is provided with a downwardly-extending ring or flange 20, which has preferably at a short distance below the flange 19 the annular slit 2l, which extends entirely around the flange 20 and entirely through its thickness. The lower part of the flange 20 is secured to the upper part thereof and to the upper portion of the valve 16 by means of the lugs 22, which lie within a preferably integral part of the flange 20. 22 are inclined all in the same direction, so as to form blades of a turbine. These lugs may be inclined or curved in various other ways, if desired, as it is immaterial to this inven- It will be seen that the lugs.

IOO

tion in its broadest interpretation how the automatic rotation of the valvel 16 is effected.

23 designates a set-screw which passes through the upper flange of the valve 16, and when turned in by means of a screw-driver im inges against .the valve-stem, locking the va ve and the stem together. The purpose of locking these two elements together is to enable the valve-stem to be used as a means for grinding the valve upon the valve-seat. The bonnet being unscrewed and the valve and stem locked the valve can be rotated byhand upon the valve-seat to produce a perfect fit between the same. An abradant of any kind may be used to assist the grinding.

The operation is as follows: As the valve is raised from its seat the slit 21 soon rises to the level of the valve-seat and the steam entering from below and escaping from the slit drives off any foreign matter that may have lodged on the valve-seat. When the valve is entirely open, the fiange 20 is entirely withdrawn from the o ening 2, so that the slit 21 has no appreciab e function in passing the steam from one side of the diaphragm to the other, as would be the case if the iiange 2O always remained within the opening 2. When the valve is returning to its seat, the fiange finally enters the opening 2, causing practically all the steam to escape'through the slit 21. As the lugs 22 are inclined the passing steamwill cause the valve 16 to rotate, thus causing the valve to find a new position on the seat every time it is closed. Just before the valve reachesits seat the steam issuing from the slit 21 will sweep out radially over the valve-seat and the bottom of the flange 19, so as to entirely free them of any foreign matter, so that the valve will close tightly on its seat and that there will be no grinding or irregular wearing of the contacting surface between the valve and its seat. By causing the steam to pass out parallel to the valveseat and the mating part on the valve all foreign matter-such as sand, filings, or the likewill be driven away without being driven against the contacting surfaces of the valve and its seat, thereby avoiding all cutting or wearing of the valve.

I-Iaving described my invention, what I claim is- 1. In a valve, a valve-seat, a valve adapted thereto, an annular flange adapted to enter and be withdrawn from the opening in the valve-seat, a narrow slit extending through the 'fiange and means within the flange for revolving the valve.

2.'v In a valve, a valve-seat, a valve adapted thereto, having thereon an annular fiange adapted to the valve-seat opening and containing openings therethrough, and inclined blades secured to the flange to revolve the valve, the axis of the fiange being open for the passage of valve-rotating uid.

3. In a valve, a valve-seat, a valve adapted thereto, a flange adapted to enter and be withdrawn from the opening in the valveseat, an annular slit extending entirely around the flange and through the same, and a plurality of lugs within the flan e to connect the same to the body of the va ve.

4. In a valve, a valve-seat, a valve adapted thereto, a liange adapted to the valve-seat opening and having a slit around the same, and a plurality of turbine-blades within the flange, connecting together the sections on both sides of the slit.

5. In a valve, a valve-seat, a valve adapted thereto, a liange adapted to enter and be withdrawn from the opening in the valve-seat, an annular slit extending entirely around the flange and through the same, and a plurality of turbine-blades within the flange to connect the same to the body of the valve.

Signed at Pittsburg this 26th day of J une A. D. 1905.

WERNER I. STAAF. Witnesses:

F. N. BARBER,

ALICE E. DUFF.

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