Патент USA US2120242код для вставки
June 14, 1938. w. s. DIEHL 2,120,242 . ‘ AUTOMATIC CUT-OFF‘ VALVE Filed Aug. 12, 19:56 \-___ ____ ___.__.._ INVENTOR B YWALTER S. D/EHL a ATTORNEY ' Patented June. 14,1938 } I , 2,120,242 UNITED‘ STATES PATENT OFFICE . ' - 2,120,242 ‘AUTOMATIC CUT-OFF VALVE \ Walter S. Diehl, United States Navy ' Application August 12, 1936, Serial No. 95,570 3 Claims. (01. 137-153) (Granted under the act of March- 3, 1883, as - ' amended April 30, 1928; 3'10 0. G. v‘157) invention relates to improvements ‘in au tomatic cut-oft‘ valves to prevent the loss of the ?uid under pressure, in the event of a rupture in the system. 5 _ ~ An important object of this invention is to provide an automatic cut-o?‘ valve, in a system Fig, 2 shows a toggle l3’ attached to the plunger ll by'a pivot 23. Fig. 4 and Fig. 5 show the longitudinal 'slots or grooves III in the plunger 9 replaced by longi tudinal holes l0’.- supplying ?uid under pressure, which may be ‘ is as follows: regulated so as to automatically close should the piping on the discharge side of the valve become 10 broken, or 'suifer any casualty which would 5 - Before putting the valve 6 into operation the plunger spring I5 is set ata predetermined ‘ten sion by means of adjusting nut l6 so that the 10 toggle l3 will maintain the plunger 9 in its normal A further object of the invention is to provide position,‘ as shown in ‘Fig, 1. The valve is armed a means for rearming or resetting the valve when - or cocked by pushing'spindle‘ l9 into engagement the operator desires to again put the ?uid sys with valve face I2 and continuing this move tem into commission. ment until the plunger 9 is returned to its normal 15 Other objects and advantages of the inven position. . With the valve 6 so armed, the ?uid tion will be apparent during the. course‘ of the under pressure ?ows into the'valve 6, the inlet result in a loss of the ?uid. , l5 - The operation of the automatic cut-oil‘ valve » n following description. In the drawing, forming apart of this speci? 20 cation, and in which like numerals are .employed ‘to designate like parts throughout the same, Fig. 1 is a cut-away side elevation of‘ the as— sembled valve; r Fig. 2 is a modi?cation of the plunger with a 25 pivoted toggle rather than a sliding toggle; Fig. 3 is a section on the line 3-—3 of Fig‘. 2; Fig. 4 is a side elevation of the valve plunger 1, thence through the longitudinal slots, grooves _ or holes III of plunger 9 and through the valve opening I8, and thence through outlet 8. Should 20 I any rupture take place in the ‘system on the out let side of the automatic vcut-out valve the pres sure on this side of the valve body 6 will imme diately drop to zero, as will the pressure on the downstream side of the plunger 9. The pressure which is acting on the upstream face of plunger N) 5 9 will be exerted on it and will overcome the pres sure exerted on the plunger 9 by the toggle l3 and ' showing it drilled with several longitudinal holes . will cause the plunger 9 to travel along the cylin rather 'than longitudinal slots or grooves; and der of the valve body 6 and force the valve mem 30 Fig. 5 is an end elevation of Fig. 4. In the drawing, wherein for the purpose of ber l2 into- engagement with the valve seat l8, illustration, is shown a preferred embodiment of thus sealing it to prevent any further ?ow of the my invention, the number 6 designates the metal ?uid through the outlet 8._ The size of the valve valve body with a ?anged inlet opening 1 and body 6 and plunger 9 depends upon the'pressure 35 ?anged outlet opening 8. , ~ Contained within the valve body is a plunger 9 provided with longitudinal grooves or slots Ill, an annular groove II, and a valve member I2. 40 Resting Within the annular groove H is a toggle 13, which toggle is securely held in place by a grooved plunger M, which is slidablyemount drop required to trip toggle i3. The size of the 35 toggle l3 depends upon the tripping load diiferen tial, which is dependent on the maximum rate of normal ?ow throughthe valve body 6, and the viscosity of the ?uid. An approximate size may readily be calculated from the equations of lhy- 40 drodynamics, and the‘ exact relations may be found by adjusting, the tripping load on the ed in a cylindrical boss I4’ formed integrally with toggle'spring. the valve body 6. A plunger spring I5 is also dis It is understood that the form of my invention, 45 posed within the boss l4’ between the plunger l4 shown and described, is to be taken and an adjusting nut l6, which is threaded into , herewith as a preferred example of same, and the various the upper end of the boss ii’. The upper endof changes in the shape, size and arrangement of the boss i4’ ‘is closed by a cap screw 11. parts’may be resorted to without departing from The valve member I2 is machined to seat on a the spirit of my invention, or the scope of the 50 valve seat l8 surrounding an opening l8’. A re subjoined claims. ~ I seating spindle is is manually operable through The invention described herein may be manu ~ a stu?ing box 20 by a knob 2| for the purpose of factured and used by or for the Government of rearming the valve member l2. A raised shoulder the United States of America for governmental ‘ 22 prevents the spindle l9 from being withdrawn purposes without the payment‘of any royalties 55 from the stu?ing box 20. thereon or therefor. v 45 50 t 55 2,120,242 Having thus set forth and disclosed the nature of this invention, what is claimed is: . 1. A valve operated by di?erential ?uid pres sure comprising a cylindrical ?uid passage with an ori?ce in the downstream end, a grooved pis ton slidably ?tted in said cylindrical passage and carrying a needle device on its downstream end, said needle device ccaxially registering with said downstream ori?ce a toggle device for holding 10 said piston and appendage ‘selectively away from or against said ori?ce, and a rearming device for setting said piston in a valve-open position against the toggle action tending to keep said piston in a valve-closed position. 2. A valve operated by differential ?uid pres sure comprising a cylindrical ?uid passage with an ori?ce in the downstream end, a perforated ving said piston and appendage selectively away from or against said ori?ce, and a rearming de vice for setting said piston in a valve-open posi tion against the toggle action tending to keep said piston in a valve-open position against the toggle action“ tending to keep said piston in a valve-closed position. - _ 3. A valve operated by di?'erential pressure comprising a cylindrical ?uid passage with scored walls and an ori?ce in the downstream end, a 10 piston slidably' ?tted in said cylindrical passage and ‘carrying a needle device on its downstream end, said needle device coaxially registering with said downstream ori?ce, a toggle device for holding said piston and appendage selectively away from or against said ori?ce, and a rearming device for setting said piston in a valve-open 'po- - piston slidably ?tted in said cylindrical passage sition against the toggle action tending to keep and carrying a needle device on its downstream said piston in a valve-closed position. 20 20 end, said needle device coaxially registering with said downstream ori?ce, a toggle device for hold ‘ WALTER s. DIEHL.