US858987A - Duplex blow-off valve. - Google Patents

Description

10.858,987. PATBNTED JULY 2, 19o?. G. L. JONES.

DUPLEX BLOW-ORP VALVE. APPLIOATION FILED 23.4.1906.

IV I TN ESSES UNITED STATES PATENT Omron".

GRIFF L. JONES, OF RIDLEY PARK, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO EDWARD L. DILLMAN, OF JAMAICA, NEW YORK.

DUPLEX BLOW-OFF VALVE Speceation of Letters Patent'.

Patented J'ulyy 2, 902';

Application fue@ April 4,1906.' serial No. 09365.

To all 'whom it' Imay concern:

Be it known that l, GRIFF L. JONES, a citizen of the United States, residing at Ridley Park, county of Delaware, State of Pennsylvania, have invented a new and useful Duplex Blow-Off Valve, of which the following is a specification.

My invention relates to a new and useful blow-off valve and cock wherein I provide two valves operated separately.

It further consists in causing the pressure in the blow-off valve, at all times, to be exerted, in such a manner upon one of the valves therein as to tend to seat the same.

It further consists of novel details of construction,

' all as will be hereinafter fully set forth.

Figure l represents a sectional view of a blow-off valve and cock embodying my invention. Fig. 2 represents a plan view, with the wheel omitted for clearness. showing a portion broken away and some of the inner mechanism in dotted lines. Fig. 3 represents a sectional view of a portion of a valve showing a slightly different form of the plug valve. Fig. 4 represents a plan view on a reduced scale showing the stops employed for preventing improper operation of the device and showing a wrench in position on the stem.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawingsz-l designates the casing of the valve having a chamber 2 therein and an inlet port 2 and a discharge port 3 therefor.

4 designates a cap or bonnet which is screwed or otherwise secured to the casing l, said bonnet being provided with a suitable opening 4X and with means for receiving suitable packing, hereinafter described.

5 designates an inwardly extending wall or valve seat of the casing having a wall 6 connected or integral therewith, between which and the walls of the casing l is formed an annular chamber 7, said wall 6 being provided with suitable ports 8, in the present instance two in number.

9 designates a disk valve which is seated, upon the wall 5 and is rotated thereon, it being understood that the upper face of the wall or valve seat 5 and the lower face of the disk valve 9 are properly ground and scraped in such a manner as to insure a positive steam-tight seat between these parts, to prevent leakage of the fluid, it being noted that the wall or seat 5 divides the annular chamber 7 from the chamber 2 of the casing and that said disk valve 9 is provided with the ports l0, in the present instance two in number, which are adapted to register at the proper time with the ports ll in the wall or seat 5 of the casing, said ports ll forming a communication between the chamber 2 and the annular chamber 7.

l By reason of the disk valve 9 being so constructed and arranged with respect to the seat 5, the latter is thoroughly protected at all times and especially when the valve is discharging, thus preventing wear and consequent leakage and making an absolutely tight valve.

l2 designates a hollow stem integral with or connected to the disk valve 9, said stem l2 being adapted to pass through opening 4 in the bonnet 4 and extends through the stuffing box 13 contained in said bonnet 4. Suitably connected with said hollow stem l2 is the hand wheel 14. Passing through said hollow stem 12 -is a stem l5 which is provided with the squared end 1G, which extends beyond said hollow stem '12. Integral with or connected to the stem .l5 is a plug valve 17, which is provided with ports 18, there being two in the present instance, which are adapted to register with the ports 8 in the wall 6, the

lower portion of said plug valve being open and com' municating with the discharge opening 3 of the casing.

In order to prevent improper operation or manipulation of the parts and in order to insure the movement of the valves to their proper positions, I have provided the bonnet 4 with a stop 19 and a stop 20 at such points thereon that a stop 2l located on the wheel 14 will Contact therewith, in order to prevent further movement of said wheel I4 when the ports 'l0 in the disk valve 9 are either in open or closed position, that is to say, when the lug 2l is in engagement with the stop I9, the ports l0 in the disk 9 are closed and when the wheel I4 is actuated in the direction indicated by the arrow in Fig. 4 and the stop 2l contacts with the stop 20, the valves l0 will be in proper register with the ports llin the seat 5. I also provide the wheel 14 with a lug or stop 22, which moves with said wheel. and on the stem l5, I provide a lug or stop 23, which is adapted to contact with the lug or stop 22 as shown in Fig. 4, the said lugs being so placed that when the same are in the position seen in Fig. 4, the plug valve -l7. is in the position seen in Fig. l, that is to say, the ports 8 are closed. lt will be noted further that the stem l5 cannot be operated until after the wheel 14 has been operated in order that the stop 22 will be removed from the path of movement of the stop 23 and that after the stop 22 is moved with the wheel 14, a suitable wrench or tool 24 can be connected with the stem l5 and this stem can be rotated until the stop 23 again contacts with the stop 22, at which time the plug valve 17 will be in such a position that the ports 18 will be in register with the ports 8 and that the blowoff valve will be open. In order that the valve can be closed, it will be seen that stem l5 must be rst rotated to remove the stop 23 out of the path of the stop 22, or in other words, the plug valve 17 must first be closed before the disk valve is closed.

The operation of the device is as follows The parts I being in the position seen in Fig. 1, the blow-off' valve is closed and the pressure of the fluid passing in the inlet 2 will be upon the top ofthe disk valve 9 tending to seat the same and' hold it in proper position. When it is desired to open the valve the hand wheel 14 is rotated a proper distance in order to turn the stem 12 and with it the disk valve 9 until the ports 10 therein register with the ports 11 in the inwardly extending wall 5, the fluid being thus admitted into the annular chamber 7, it being noted, however, that the pressure still remains upon the top of the disk valve 9. The stem 15 is now rotated in order to cause the plug valve 17 to rotate and cause the openings or ports 18 therein to register with the ports 8, at which time the fluid can pass from the annular' chamber 7 through the plug valve 17 to the discharge 3, from whence it can be conducted to any suitable point. When it is desired to close the valve the stem 15 must .first be operated to close the ports 8, after which the disk valve 9 is operated to close the ports 11.

The operation of the stops it is believed will be thoroughly understood from the description already given and therefore, I have not repeated the same in the operation.

It will be seen from the construction shown in Fig. l that the plug valve 17 is provided with inclined walls to correspond to the inclination of Walls 6, the larger portion of the valve in this figure being at the upper side.

In the construction shown in Fig. 3 l have shown the inclination of the walls of the plug valve reversed from that shown in Fig. 1 and the inclination of the walls 6 with which the plug valve contacts is inclined to correspond to the inclination of Walls oi the plug valve, the discharge opening in this case being made large enough to permit the insertion and removal of the plug valve 17 which thus can be accomplished without disturbing the disk valve 9 and as there would be comparatively no wear upon said disk valve 9 since the pressure, as already explained, will be upon the upper surface thereof, the portion oi the blow-off valve which will be most liable to damage or which will require regrounding; will be the plug valve 17 and in the construction shown in this figure, the said plug valve can be removed without removing the pressure from the disk valve 9 or in other words, the plug valve can be removed, ground, and replaced While the blowoff valve is under pressure.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is zd l. In a blow-off valve, and cock, a disk valve upon the upper surface of which the pressure of the steam is adapted to act, means for operating said disk valve and a plug valve having means for operating the same, said plug valve controlling the discharge opening of the blow-od valve and said disk valve controlling the inlet of the blow-0E valve.

2. In a device of the character described, a casing, a diskyalve located in said casing and upon which the pressure is applied tending to seat the same, a plug valve located in said casing, and separate means for operating said valves independently of said casing.

Si. In a device of the character described, a casing having a valve seat therein forming chambers on opposite sides, said' seat having ports therein, a disk therefor on said seat Vand adapted to receive the pressure upon its upper surface, a plug valve controlling the outlet from one of said chambers, and independent means for operating said valves.

4. In a device of the character described, a Ycasing having inlet and discharge ends, a seat in said casing having passages forming the communication between the inlet and discharge ports, a disk valve in said casing and on said seat and controllingthe passage therein, a plug valve in said casing controlling theKdischarge port, and separate means for operating said valves independently of said casing.

5. In a device of the character described, a casing, havY ing inlet and discharge ports, a seat in said casing dividing the same into inlet and outlet chambers, said seat having ports therein, a disk valve on said seat and having ports adapted to register with the ports in said seat and being so situated as to receive the pressure upon its upper surface, a plug valve controlling the ports of said discharge chamber, separate means for operating said valves, and stops in connection with said operatingl means being so situated as to prevent improper operation of the valves.

(i. In a blow-off valve, and cock, a disk valve upon which the pressure is so applied as to tend to seat the same, means for operating said disk valve, a plug valve, separate means for operating the same, and means for preventing improper operation of said valves.

7. In a blowott valve and cock, a disk valve upon which the pressure is so applied as to tend to seat the same, means for operating said disk valve, a plug valve, separate means for operating the same and stops so situated as to prevent improper operating oi the valves.

8. In a device of the character described, a casing having inlet and discharge ports, a disk valve controlling said inlet port, a sleeve carried by said valve and adapted to be engaged for operating said disk valve, a plug valve located in said casing, and a stem on said valve projecting through said sleeve and adapted to be engaged to operate said plug valve.

GRIFF 'n JoNns.

Witnesses .Toi-1N A. WIEDERSHEIM, C. D, MCVAY.

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