US1258937A - Valve. - Google Patents

Description

' 1-. WPALMER.

' VALVE. APPLICATI ON FILED MAR 25. I915.

human 12,1918.

' a swans-sum I.

J. M. PALMER.

I 'VALVE. APPLICATION FiLED MAR. 25. I915.

1%5833? Patented Mar. 12, 1918.

3 SHEETS-SHEET 2.

Q Q r J. M. PALMER,

VALVE. APPLICATLQQ! FILED MAR- 25, I915.

LQ5899$7 .v Patemd Mar. 12, 1918.

45 the preferred form thereof.

' tion I secure automatically by the operation "which closes the valve and it is a resultant J M. PALMER, OF CHICAGO, ILLINOIS.

VALVE.

Specification of Letters Patent.

Patented Mar. 12, 191 8.

I Application filed March 25, 1915. Serial No. 16,834.

To all whom it ma concern:

Be it known t at I, JOHN M. PALMER, a citizen of the United States, residing at Chicago, in the. county of Cook and State of Illinois, have invented. a certain new and useful Improvement in Valves, of which the following is a full, clear, concise, and exact description, reference being had'to the accompanying drawings, forming a part of this specification.

My invention relates to valves for controlling fiuid flow and its object is twofoldthe effectiveness of the closed position, and durability.

With reference to the first named object, I provide means for spreading the valve member or gate so that it will firmly engage its seat or seats to absolutely prevent the passage thereby of any of the fluid in-' tended to be controlled. This spreading acof continued actuation of the valve handle after the valve has reached its closing position.

With reference to the other object, that of durability, my invention is concerned with the protection of the valve seat and, consistent with this object, I rovide what term a covered seat valve ,that is, ll provide a valve seat which, when the valve member or gate is moved therefrom, is protected either by being entirely covered,

' which is the case in the preferred embodiment of my invention, or by being nearly covered but so completely protected as to be guarded against the injurious action of the rushing passage of fluid through the valve chamber, such as the rush of steam, for instance.

I have illustrated several forms vention.

Figure 1 illustrates in vertical axial crosssection the simplest form thereof.

Fig. 2 illustrates a vertical cross-section,

of my in- Fig. 3 illustrates in vertical axial crosssection an elbow valve, embodying the features of my invention.

Fig. 4 is a vertical axial sectional view of an elbow form of valve, embodying the features of my invention in modified form. Fig. 5 is a cross-sectional view taken on the plane of the line 6, 6, of Fig. 1 and lookingl in the direction indicated by the arrows, an

Fig. 6 is a sectional view taken on the plane of the line 7 7, of Fig. 4, looking in the direction indicated by the arrows.

Referring first to Fig. 1, it will be seen that I provide a valve body 8 which is provided with the inlet and outlet openings 9, 9, threaded internally for the reception of connecting pipes. The valve here shown is a key-valve and the upright portion 10 thereof is provided with a square chamber for the reception of the movable valve part or gate 11. This gate, as illustrated in Figs. 1 and 5 is centrally divided and when in its lower position is adapted to fit snugly in the pocket 12. The vertical dimension of the part 10 is suflicient to receive the valve part 11 when it is moved in its open position. The upper part of the part 10 is made circular and is internally screw-threaded as illustrated at 13 for the reception of a cap 14. The valve stem 15 is screw-threaded axially in the cap 14, being packed by means of the auxiliary packing cap 16 holding the packing 17 in place. The valve stem is provided with the hand Wheel 18. The lower part of the stem 15 is screw-threaded into the joined parts of the gate 11. The lower screw-thread is of the same pitch as the upper screw-thread but is in the opposite direction and only one face of the thread is oblique, this being the upper face,

about the stem 15. In this way, the gate 11 will travel upward twice as fast as the stem itself and only a few turns are required to open the valve to full open position.

When the hand wheel 18 is turned in a clockwise direction the stem 15 will move downwardly and the gate 11 will climb rise in the cap 14 and the gate 11 will rise ing out this description.

fill

. the upper part 'ture of Fig. 1. It

downwardly on the stem 15 at a rate of speed equal to that of the stem, making the rate of speed of the gate relative to the casing or body twice that of the stem. When the gate 11 reaches its lowermost position, that is with the wall 20 engag ng with the oblique surface of the wedging head 21 on the stem, a spreading or wedging action begins and continues with the continued movement of the hand wheelltl in a clockwise direction. This spreading action is due to the wedging ot the two parts of the gate 11 down upon the wedg ng head 21 and also due to a separating action of the gate 11 due to the formation of the threads on the lower part of the stem 15. Tu this way the two halves of the gate member are firmly jammed against the sides of the rectangular chamber and an absolutely closed joint is provided at 22, 22. lEteierence to Fig. 6 will assist in an understandlrteterring now to Fig. 2. it will be seen that l provide a structure like that of Fig.1 with, however, some very important additions. The valve body or casing 23 1S'PKO- vided with the inlet and outlet openings 2% which are surrounded by engaging flanges 25, 25, provided for the purpose oi? making connections to pipe lines. The movable valve portion or gate 26 is generally similar.

to the valve portion or gate 11 of the strucis of rectangular crosssection and it operates in the corresponding vertical chamber 26', this chamber 26 extending both above and below the horizontal portion of the valve body, as illustrated. The top of the vertical portion or the valve body is provided with a flange 27 to which the flange 28 of a cap 29 may be secured by means of bolts 30, 30. The cap is provided with a yoke 31 upon the top thereof and the stem 32 is screw-threaded in this yoke 31, as illustrated. The top of the stem 32 is squared, as illustrated at 33, for the reception of a hand wheel (not shown). The stem 32 is packed in the cap 29 by means of the packing 34-. held in place by means of the bushing 35. The lower portion of the stem 32 is provided with two wedging members 36, 36, which are adapted to engage oblique walls, 37, 37 upon the respective halves of the gate member. The stem between these two wedging parts 36 is screw-threaded, as illustrated at 38, this screw-thread being opposite in direction to the screw-threads at of the stem and being of the same nature as the screw-threads upon the lower portion of the stem in the structure of Fig. 1. The general action is the same as in Fig. 1. When the stem 32 is turned in a counterclockwise direction the valve part 26 rises upon the stem and with the stem, the

pocket 39 being provided for the movement of the upper part 36 relative to the parts 26.

nausea? llt will be seen that the chamber 26 is supplemented by a pocket all on each side thereof, this pocket being annular and surroundin the respective passageways. A. ring seat at is disposed in each pocket and a clamping rin "42 having engagement with the seat ring ll is disposed inside the ring at, the two rings having conical engaging surfaces, as clearly illustrated. A bushing 43 screw-threads internally in the clamping ring t2 and, upon its outer end, is provided with a flange a l which is disposed in a pocket as surrounding the passageways. It will now be seen that the bushing 43 may readily be interchanged so as to secure the proper size of internal opening and that it is not necessary to provide internal finish for the valve body except in these removable parts. The valve gate or movable member 26 firmlyengages the seat 41 on both sides, as illustrated. Tn its uppermost position, the part 26 is guided by the guiding pieces 46, 46, so that in initiating the downward movement of the valve member, the stem will not be caused to skew from one side to the other.

ll now come to a very important phase of my invention. The vertical chamber 26 is supplemented at the bottom by a pocket 4:? and a valve seat cover member i8 is disposed in this pocket when the valve is in its lowermost position, this valve seat cover member being integral and extending downwardly from the valve part 26. This valve seat cover member is provided with a bore 49 which ,is adapted to register with the horizontal passageway of the valve body when the valve gate is in its uppermost position, and it will be noted that when in this position the cover member clearly is seated upon the seat ring it, all the way around, thus 'efiectively protecting the seat against the action or the fluid passing through the line-such as the injurious action of rushmg steam.

lit will be seen when 1 lower the valve part 26 by turning the stem 32 in a clockwise d1- rection, the wedging, described relative to Fig. 1, will follow by reason of the engagement of the wedging heads 36, 36, with the oblique walls, 37 37 and also the wedging action of the threads about the lower part of the stem, due to the peculiar formation of these threads. Thus, when the valve s in closed position, l get an absolutely tight oint and when it is in open position, I efitectively protect the valve seat against inurious action.

Referring now to Fig. 3, it will be seen that I embody the features of my invention in approximately the same kind of structure, except that the structure is an elbow valve instead of a straight valve. The valve body is illustrated at 26 and it may be assumed that the passageway 51 is the inlet opening while the passageway 52 is the outlet opening,

' plies to Fig. 3, the same to connect these openings with the pipe line.

So far as the description offthe Fig.2 aprefe'rencev characters have been used, and it willbe unnecessary to repeat this description here. A seat ring is provided only upon oneslde and when the valve is in raised osition, the seat ring is effectively covered ust as heretofor'e described. However, the lower por-' tion of the seat cover is provided with the opening 53 through whlch the flu1d may pass, in addition to the passage of fluid 1n the part 54. The stem 32, 'in this instance, is threaded in with the auxiliary cap 56 to form a stufling box 57. Furthermore, in this instance, onl one wedging head 36 is (provided, but the action is the same in kin In Fig. 4:, I illustrate still another type of valve embodying the wedging and seat covering principles of my invention. This is an elbow structure, the valve body or casing being shown at 60. The inlet 61 is surrounded by the connecting flange 62 and the. is surrounded by the conoutlet opening 63 necting flange 64. In this instance, the cap arrangement is substantially that of Fig. l and the parts have been similarly lettered. However, in this structure, the chamber 65 is c lindrical and a bushing 66, which is finis ed while the remainder of her, the lower portion of the bushing 66 be-' in rovided with a valve seat 67. p 4 d e valve 68 is composed of three portions, the two side portions 69, 69, and the bottom portion 70. The bottom portion 70 is provided with an oblique surface 71 seated upon the conical seat 67 upon the bushing 66.

This bottom portion is also provided with an upper conical surface 72 which the bottom -c0n1cal surface 73 upon the ortions 69, 69, ho ds the bottom but permits of a little engages'. The screw 74 part to the side pieces, play between the'two parts. The stem, inthis instance, is not provided with a wedgin head but the lowermost screw-thread 1s 0 the form of the lowermost screw-thread of Figs. 1 and 2. 7 Extending downwardly from the valve portion 70 is a member 75 which carries the seat cover oi protector7 6, this member being provided with guiding lugs 77 as clearly shown in Fig. 6. The gate is shown in its closed position, and it will be obvious, as

heretofore explained, that when the hand wheel is turned in its counterclockwise direction, the gate will climb upwardly upon the stem and also 'move upwardly with the stem. 'This opens the passageway between the 'et and outlet and when the valve is brought to its uppermost position, the protecting or covering ring 76 will bedisposed just inside the valve seat 67. So far as prois brought downwardliyl the cap 55 which is provided valve seat while,

the chamber may be'unfinished, is slipped into this cham- .ber, a stem threaded tecting the valve seat against rushing steam is concerned, the fact that the protecting ring 7 6-does'nottouch the valve seat is immateriaLsince nevertheless the proper protection toward which I am aiming is secured. However, I do place the ring 76in the valve .seat so as to prevent any (possibility of the collection of slime in a po et, which might otherwisebe'formed. When is turned in its clockwise direction the gate and when the under oblique surface 71-oft e part engages the valve seat 67 it will arrestits movement, but Y the. parts 69, 69 will continueto cfomeidown and will jam the part 70 down upon its ters Patent:

1. In a valve, a body providing a chamber,-an inlet and an outlet therefor, a'twopart gate havingan oblique surface for re ciprocating in said chamber, a stem threaded in said body and threaded in said gate, the latter threads'being normal on one face and oblique on the other to secure a wedging action to expand said gate, the two sets of threads on the-stem beingin rections, and a wedging member carried by said stem for engagin the oblique surface in said gatefor sprea ing the same.

2. In ;a valve, a body providing a chamber, an inlet and an outlet therefor, an expansible gate for reciprocating in said chamber, a stem for turnin in said body, and threaded in said gate, t e thread bein normal on one face and oblique on the ot er to secure a wed ing action to expand said gate.

3. In a va ve, a body'providing a chamber, an inlet and an outlet therefor, an ex pansible gate for reciprocating in said chamin said body and threaded in said gate, the latter thread being normal on one face and oblique on the other to secure a wedging action to expand said the valve stem at the same time, these' parts themselves will be jammed .firmly in opposite digate. r

4. In a valve, a body providinfg a chamber, an inlet and an outlet there or, an ex pansible gate for reciprocating 1n said,

chamber, a stem threaded in said body and threaded in said gate, the latter thread being normal on one face and oblique on the other to secure a wedging action'to expand said gate, said threads being .in opposite directions.

5. In a-valve, a body providin ber, an inlet and an outlet theret pansible gate havin a reciprocating in said ed 1n said body and a chamr, an exan oblique surface, for chamber, a stem threadthreaded in said gate,

I g aeeaear the latter thread hein normal on one face and oblique on the ot or to secure a Wedging action to expand said gate, the two sets of threads on the stem, being in opposite directions, and a plurality of wedging members carried by said stem for engaging the oblique surface in said gate for spreading the same.

6. lln a valve, a body providing a chamher, an inlet and an outlet therefor, a twopart gate having an obhque surface, for reciprocating in said chamber, a stem threaded in said body and threaded in said gate, the latter thread being normal on one face and oblique on the other to secure a Wedging action, the two sets of threads on the stem, being in opposite directions, and a plurality of Wedgmg members carried by said stem for engaging the oblique surface in said gate for spreading the same.

7. In a valve, a body providing a charm her, an inlet and an outlet therefor, an expansible gate for reciprocating in said chant her, a stem for turning in sai body, and

threaded in said gate, the thread being nor-' mal on one face and oblique on the other to secure a Wedging action to expand said gate, and meansfor covering the valveseat when the valve is in open position.

8. In a valve, a body providing a chamber, an inlet and an outlet therefor, an expansible gate having an oblique surface for reciprocating in said chamber, a stem turnmg in said body, and threaded in said gate, the threads being normal on one face and oblique on the other to secure a Wedging action to expand said gate, and a Wedging member carried by said stem for engaging the oblique surface in saidgate for spread ing the same.

In Witness whereof, ll hereunto subscribe 5name this 22nd day of March A. D.

JUHN M, PALMER.

Witnesses:

Lrsnm W. Faronn,

. Earner W. ltterernn.

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