US1573108A - Stop valve - Google Patents

Description

Feb 16 1926. 1,573,108

B. T. WILLIS-ron STOP VALVE4 Filed March 30J 1925 2 Sheets-Sheet l Z3 X973 Z2 4 :E

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Filed March 30, 1925 2 Sheets-Sheet 2 Patented Feb. 16', 1926i.

UNITED STAT-Es rsnioa .PATENT OFFICE.

. BELVIN T. WILLISTON, OF 'SOMERVILLE, MASSACHUSETTS, ASSIGNOVR'TO MANNING, MAXWELL & MOORE, INC., OF NEW YORK, N. Y., A .CORPORATION OF NEW JERSEY.

sror VALVE.

l appnc'ation inea March so, .1925.` seran No. 19,234.

To @ZZ 'whom t may concern.'

Be it known that I, BELvrN T. VILLISTON, a citizen of the United States of America, and resident T Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Stop Valves, of which the .following is a specification.

This invention relatesto valves, and more particularly to high pressure valves suitable for use in controlling the flow of superheated steam or similar fluids and comprising a stationary seat and a relatively movable valve member reciprocable toward and Yfrom the seat to regulate the `fluid flow.

Principal objects ofthe .invention are to provide an improved valve comprising means for protecting the valve st-em from gritty material which might wear the gland or cut the packing; to provide means vfor positively applying pressure tothe gland or for removingsuch pressure, said means being of such a character that the pressure is applied uniformly and without danger' of cramping or distorting t-he moving parts, and means for attaching the yoke to the valve of such character that a joint maybe eiiected between. the bonnet or yoke of the valve and the body of the latter with less etl'ort and more certainty than in valves Oi usual construction; and so to shape the valve body proper as to permit it readily to be machined from a. forging without undue effort or waste of material.

In the accompanying drawings, in which one embodiment of the invention is disclosed for purposes of illustration,

Fig. 1 is a central vertical section;

Fig. 2 is another central vertical section, the plane of said section being at right angles to the section of Fig. 1;

Fig. 3 is a horizontal section on the line of Fig. 2; and Y Fig. 4 is a: perspective of the gland. y

1n the speciiic embodiment of the invention shown in the drawings the numeral 1 designates the valve bodywhich may be a steel forging, and which is provided with aligned passages 2 and 3 internally threaded for the reception of pipe connections. Substantially midway between its ends the body 1 is provided with a boss 4 having a bore 5 terminating in the inlet chamber 6. A valve 7 is disposed in chamberl 6. This valve is reciprocable to and from, a seat member 8` having threaded engagement with a threaded opening ina septum or parti tion separating the inlet chamber 6 from an outlet chamber 9. The seat member 8 is provided with a plane annular seat 10 whichcooperates with a corresponding annular surface 11 upon the valve 7 when the latter is in closed position. Y

The inlet opening 3 is connected with the chamber 6 by a passage 12 which may be formed by drilling at an angle through the upper end. of the passage opening 5. The opening 2 and the outlet chamber 9 are connected by a bore 13 drilled diagonally through the passage 2. From the construction so far described it will be apparent that the valve body may be made by torg ing and all of the openings and chambers therein produced by drilling, while thevalve seat may be inserted through the passage 5. l

`The upper end of the boss 4 .is finished to provide a surface 14 upon which a yoke or bonnet portion 15 of Vthe valve is mounted. This portion of the valve structure comprises the bonnet proper 16 'having an axial bore 17 for the passage of the valve stem 20. lThe bore 17 is enlarged just above the lower' end 19 of' the bonnet to provide a pocket for the reception of packing material 18. The stem 2() has a' flange 20 at its lower end which seats in a socket in the valve 7 and is clamped to the valve by means of a sleeve 7 lthreadedly engaging the inside oi2 the valvemember and abutting the upper side of the iiange 20. At its upper end the stem carries a hand-wheel or handle H.

Diametrically opposed arms 21 extend upwardly from the body portion of the bonnet 16 and at their upper ends imite with an annular rim 22. A nut 24 is seated in the bore 23 of rim 22 and is clamped in place by means of a radial ilange at its lower end and a retaining nut 26 at its upper end, any suitable means beingpro-4 vided for positively preventing relative rotation of the nut 'and rim. For example the flange at the lower end of the nut may be angular and seated in an angular socket in the lower surface of the rim. The nut 24 is internally screw-threaded for engage ment with external threads 25 on stem 20.

The numeral 27 designates a gland provided With a cylindrical portion 28 having a sliding lit within the enlargement ot the bore 17 andl furnished with a transversely `gland serves to compress the packing i8 'and thus to prevent leakage along the stein 20.

The arms 30 are provided with arcuate'ribs1 3l at their ends, whose function will shortly be apparent.

The voutside of the annular rimf; 22- is screw-threaded at and an internally threaded hollow cylindrical rcap 33` may be screwed up or down' upon the 'threads The exterior ofthe memberv 33 is termed in any suitable manner to permitthe cooperation therewith of a wrench or the like. The lower part of the peripheral surface or" the member 33 is externally `threaded andV a collar 34 threadedly engages the latter. 4The threads engagingk the collar il are of opposite pitch to those engaging. the nut 2:2 so that turning the cap 33 does not tend to nnscrew the. vcollar ,3%. This collar Irl/l is provided with an inwardlyy directed flange at. its lower edge. yThe ribs 3l of the arms 29 and 30 project into the grooveff` between the lower edge ot the cap 33 and the flange 35 so that luinvard or downward movement ot' the cap S3 raises or lowers the gland 27. Since. the cap 33 1orms a complete cylinder, the application of a wrench or other suitable means for turning` it does not appreciably distort it, might be the case it it were cut away or open on opposite sides, while at thesame time the pressure applied to the gland isalways substantially parallel to its axis so that `there is little tendency to cramp the parts.

The bonnet l5 is externally threaded at 37 near its lower end, and the boss t on ythe body l is alsoV externallyithreaded at 38, the threads upon the. bonnet being of liner pitch than those on the body, the 'threads both beingright handor both lett han-d, as desired.

The numeral '39 designates a nuthaving threaded portions l0 and ll cooperating respectively with the threads on the bonnet and body.` rllhis nut is: rotatable to v`draw the bonnet to a seatupon thesurtace ll, the. ditlerential action otl thetwo sets of screw threads serving to produce a very tightengagement between trie. bonnet and body by the application ot av relatively small force. Pre'terablythe nut is provided with one or more stops, for example pins 42 engaging` an axially elongate groove in the bonnet l5, to prevent undue movement ot' the nut toward the body which might result in seating the nut yinstead ot the bonnet against the sur- 00 tace 14e.

fBy reason of the construction described construction of the hollow cap 33 and relatedparts .the valve stem is wholly7 enclosed from above and from the sides so that gritty material is kept from it most successfully.

jl'llhilethere is `herein described one embodiment which the invention may assume in practice itis to be understood that 'the same may be substantially modified without departing from thespirit of theinvention or the scope ot the appendedclaims.

I claim:

.1. ln a valve, a vvalve body having a seat therein, av valve adapted tovcooperate with said seat.l a val-vestem secured to the valve, a bonnetsurronnding said stem, a gland reciprocahle .relative to said bonnet, and means tor. adjusting said glandincluding a member having a cylindrical wall surrounding the portion ofsaidV valve stem between the Vtop otsaid gland and the top of said bonnet.

l @hln .a valve, a valve body'. having Va seat the kein, 'a valve adapted to cooperate with said seat, a valve stem tor moving the valve, a .bonnet surrounding said stem, a gland reciprocable.relative to said bonnet, and means .for positively adjusting saidgland in leither direction including a member having thread.

ed engagement with said bonnetand rotata ble but axially rimmovable relatively to said gland; Y y i n n f' lnaL valve, a lvalve body having a seat `heroin'ya.valve adapted to cooperate with said seat,Y a valve vstem connected to the valve., a bonnetsurrounding said stem, said bonnet hav/ing,l at its upper end an annular rim surronnding'saidstem, a gland reciprocable relatively to said bonnet, and means foradjrsting said gland including a hollow cylindrical ca p having threaded. engagement with said bonnet rim and having a connection with said Oland including means provid! ing' an annular groove coaxial with said stem on.` said cap,v and means `tixedl relatively to said gland seatedrwithin said groove, said cap having an unbroken peripheral wall extending between said groove and said bonf net rim; l

SignedA by me at'Boston, 'l\lassachusetts, this 9th dayot March, 1925. y

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