US 1752908 A
Description (OCR text may contain errors)
P. HdsEL April 1, 1930.
BALANCED VALVE Filed Feb. 17, 1928 Inventor:
His A't'tor-n ey Patented Apr. 1, 1930 UNITED stares uszses Arum" OFFICE I PAIIL Ht'lSEL, OF CHARLOTTENBUBG, GERMANY, ASSIGI Q'OR TQ GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK nanancnn VALVE Application filed February 17, 1928, Serial No. 255,131, and in Germany March 1, 1927. Y
valve casing having an inlet opening 2, a disj charge opening 3, and walls forming valve seats 4 and 5. Valve seats 1 and 5 are oppositely arranged relatively to each other, tne
valve seat 4 facing upwardly and the valve 1 seat 5 facing downwardly. Extending across the valve casing is a hollow guide rod 6 on which valve disks 7 and 8 are slidably mounted. Valve disks 7 and 8 are adapted to engage valve seats 1 and 5 respectively.
. Valve disk 7 is connected to the outer end of an arm 9 which is fixed on a shaft 10 extending transversely of casing 1 and pivotally mounted in walls of the casing. Valve disk 8 is connected to the outer end of the arm 11 fixed on a shaft 12 pivoted in walls of easing 1. Shafts 10 and 12are connected together outside casing 1, by a rod 13 which is connected at one end to the end of an arm 14 fixed on shaft 10 and at the other end to the end of an arm 15 fixed on shaft- 12.
Fixed on shaft 10 is a lever arm 17 to the free end of which an actuating rod 18 is connected. Rod 18 may lead toany suitable type of valve actuating mechanism adapted to be either manually or power controlled.
In rod 13 is a turn buckle 16 for use inadjusting the length of the rod. By adjusting the turn buckle 16 it will be seen that the I When the valve seen that the elastic fluid flows through both the turn buckle may be adjusted to bring the other valve disk to its closed position.
Valve disks 7 and-,8 are provided with'separate balancing pistons, the balancing piston for valve disk 7 being indicated at 19 and thebalancing piston for valve disk 8 being indicated at 20. In the present instance, bal- 1 anc-ing pistons 19 and 20 are shownas telescoping one wlthln the other so that in substance the balancing piston of one valve disk forms a cylinder for the balancing piston of the other valve disk. In guide rod 6 are openings 21' connecting the space within balancing pistons 19 and 20 to the inlet side of valvecasing 1. g
With the foregoing arrangement, it will be seen that when rod'18 is moved upward valve disks 7 and 8 are both moved toward their seats and? that when rod'18 is moved downward valve disks7 and 8 are both moved away from their seats. Since valve seats 4 and 5 are oppositely arranged, valve disks 7 and 8 are arranged to move in opposite directions. lVhen valve disks 7 and S are both on their seats, it will beseen that the pressure acting ,on the outer surfaces of valve disks 7 and 8 is counterbalanced by the pressure inside balancing disks 19 and 20 so that when seated the valve disks are balanced. This softhat no pilot valve arrangement such as is used ordinarily with valves of thistype, is
disks are opened, it will be of them in the same manner; that is, it flows under the valve disks and through the valve openings. This means that the flow past the two valve disks is'alike. By this means the formation of eddies in the flow is to a great extent eliminated so that a smoother and more even passageof fluid through the valve openings is obtained. i
In the, usual-type of balanced valve structure the valve seats are similarly arranged and the valve disks are rigidly fastened together and both move in the same direction. When such a valve is open, it will be seen that at the one opening the flow of fluid is 190 under the valve disk and through the opening while at the other opening, it is through the opening and against the underside of the valve disk. As a result the flowthrough the two openings is not alike and that at the one opening the fluid after flowing through the opening strikes against the underside of the valve disk and is diverted by the valve disk.
This tends to set up eddies in the flow. By the construction of the invention wherein the valve disks are oppositely arranged and the valve disks move in opposite directions in opening, the diiiiculty just referred to is avoided.
In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.
\Vhat I claim as new and desire 'to secure by Letters Patent of the United States, is:
1. In a valve structure, a valve casing,
walls in the casing which define oppositelyarranged valve seats, valve disks for said seats, means for moving said valve disks simultaneously toward and away from said valve seats, and balancing pistons for sald 'valve disks.
2.1In a valve structure, a valve casing, walls in the casing which define oppositelyarranged valve seats, valve disks for said seats, means for moving said valve disks simultaneously toward and away from said valve seats, and telescoping balancing pistons for said valve disks.
a 3. In a valve structure, a valve casing,walls in the casing which define oppositely =arrangedvalve seats, valve disks for said seats,
means including a rod connecting said two. valves together, means for adjusting the L; length ofsaid rod, means for moving the rod I to simultaneously move said valve diskstoward and away from their seats, and balanclng means for said valve dlscs.
4.In a valve structure, a valve casing,
walls in the casing which define spacedoppositely arranged valveseats, valve discs for said seats',n1eans for moving said valvediscs simultaneously toward and away from said valve seats, gand telescoping lmlancing pistons connected to said valve discs ;and arranged between said seats.
In witness whereof I have hereunto set my hand this 31st day of January, 1928.