US1362331A - Means for controlling valves - Google Patents

Description

C. W. LARNER.

MEANS FOR CONTROLLING VALVES.

APPLICATION FILED MAR. 6, 1919.

1,362,331. Patented Dec-14,1920.

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C. W. LARNER.

MEANS FOR CONTROLLING VALVES.

APPLICATION FILED MAR- 6. 1919.

1,3 2,331. Patented Dec/14,1920.

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PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Application filed March 6, 1919. Serial No. 280,939.

T 0 all whom it may concern Be it known that I, CHESTER V. LARNER, a citizen of the United States residing at Philadelphia, in the county of lhiladelphia and State of Pennsylvania, have invented certain new and useful Improvements in Means for Controlling Valves, of which the following is a specification.

This invention relates to pressure operated plunger bowl valves for operation with distributing systems, in which the direction of fluid flow is from the large end of the valve toward the small end, and which valves are operable in any position.

The principal object is to improve the system of control of valves of this type, particularly the Johnson valve for which Letters Patent N 0. 1,030,890, were granted to Raymond D. Johnson, July 2, 1912, and more particularly such valve when discharging against substantially atmospheric pressure.

The nature, characteristic features and scope of the invention will'more readily be understood from the following description taken in connection with the accompanying drawing, where,-

Fi ure 1' is a longitudinal sectional view of a ohnson valve embodying my improvements, and

Fig. 2 is a similar view of a modification.

Referring to the drawing, the numeral 5 represents a valve body or housing, which, as is usual may be an enlargement of a conduit or pipe line for fluids under pressure, 6 and 7, are respectively, the fixed and telescopic plunger valve elements, the latter being afforded a seat, as is usual, on the wall of the valve body at the small end or neck thereof.

' Referring to Fig. 1, it will be noted that the chambered part of the plunger 7 is fully open to communication with or is co-extensive with the chambered part of the fixed unit 6, so that there is formed a closing chamber 8 to which pressure is .supplied through a port 9 extending from the fixed unit or valve section 6 to a point outside the valve-body. An orifice'10 inthe nose of the plunger serves to discharge any accumulation of pressure in the chamberS when pressure supplied through port 9 is cut ofl", thus opening the .valve and assuringthe maintenance of the'valve in that positlon. Port 9 connects with control pipin 11 leading to a source of pressure supp y in the valve or to any other source where static pressure at least equal to that in the pipe line -may be obtained, there beingan interposed control valve, as indlcated at 12.

The construction illustrated in Fig. 1 is designed for use wherever the fluid will be discharged into the open air or into an outlet connecting pipe of such size and length that it will not interfere with the free flow of the jet to the extent of developin a back pressure opposed to the direction 0 the jet of} any appreciable amount above atmosp ere.

In order to effect a closing stroke of the plunger element 7, the control valve 12 is opened whereby pressure is supplied from the control system to the operating or closing chamber 8 sufficient to force the plunger to its seat. Evidently, the control valve and its complemental piping have an area in excess of that of the orifice 10 suflicient to maintain the required static pressure in the closing chamber 8 for moving the plunger to its closed position.

To open the valve, the control valve 12 is closed, thus cutting off the supply of prespipe line above the sure to the closing chamber 8 and enabling the accumulated pressure to be discharged through the orifice 10. With the plunger in the closed position, a portion 13 of its conical surface is subject to the static pressure existing in valve body 5, due to the fact that the diameter of plunger 7 is larger than the diameter of its seat in the neck of the valve body 5 and this applied pressure operates to unseat the valv The orifice 10 will continue to discharge pressure from the chamber 8 until the total closing force in said chamber is less than the total opening force applied externally of the plunger when the plunger will open and finally come to rest in its fully open position, in which 0- sition it will be held by the fluid flow ue partly to the turning of the stream and partly to the presence of a certain amount of static pressure in the discharging jet as it asses the nose of the plunger.

eferring to theconstruction, Fig. 2, the same positive closing action prevails, but I also provide a more positive opening action for the valve. In this construction the plunger element is reduced in diameter throughout a portion of its length so as to form with the fixed element an annular opening chamber 14 from which a pasthe control valve 12 is closed. The orifice 10, acts, as before noted, to discharge any accumulation of pressure in vthe closing chamber 8, thereby eliminating any closing force. The opening chamber 14 being connected directly to a source of static pressure is of course under a positive. pressure and serves to open the plunger and to hold it in -the open position as long as the control valve 12 is closed. e

In-order to seat the plunger, the control valve 12, is opened whereupon a positive pressure is established in the closing member 8. This positive closing pressure is greater than the opening force prevailing in chamber 14: plus the opening force applied externally ofthe nose of the plunger by the turning of the stream and by the pressure of static pressure in the flowing fluid. Hence, the plunger isforced to its seat.

I claim i 1. In a valve comprising a body and fixed the body affords a seat and movable plunger valve elements havao ing a single chamber between their heads and a fluid way around them and of which for the movable ele-" ment, the combination of provisions respon-,

sive to fluid pressure and operative to un- 35 seat the movable element by vreduction of pressure in saidsingle chamber, an orifice;

provided in the movable element and open ,for limited discharge, a connection for supplying pressure to the interior of the mov- 40 able element in excess of the discharge to 5 close the valve, and means for throttling the connection-to permit the valve to open, substantially as described.

2. In a valve plunger provided with an open orifice for continuously discharging pressure from the interior of the plunger, means for supplying-pressure to the interior of the plunger in excess of the pressure discharged for clos- 50 ing the valve, devices for throttling said pressure supply means to permit of the opening of the valve, and means for exerting fluid pressure on the movable plunger to open the valve, substantially as described, 55

In testimony whereof I afix my signature.

CHESTER W. LARNER.

the combination of a hollow 45

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