US1351259A - Valve - Google Patents

Description

L. MASCHEK AND C. B. HIGGINS. VA LVE. APPLICATION FILED 00128, I918- 1, 35 1 259. Patented g- 31, 1920.

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L. MASCHEK AND 0. B. HIGGINS. VALVE.

APPLICATION FILED OCT. 28, 1918- v Patented Aug. 31, 1920.

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.. AE A lww \w INVENTORS. Louw-Mascheff and Camillm B. Jllgyzm,

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ATTORNEY.

WITNESS:

L. MASCHEK AND C. B; HIGGINS.

VALVE.

APPLICATION FILED OCT. 2a, 1918.

Patented Aug 31, 1920.

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W I TNESS V B Mm K my mm untranstares e are LOUIS MAsoHnKIAnn CAIVIILLUS B. HIGGINS, or nANsAs crrY, MIssooaiQ.

VALVE.

Specification of Letters Patent. Patented Ailg. 31,1920.

' Application filed October 2a, 1918. Serial no. 260,023.;

gas arising from gasolene and other volatile hydrocarbon 011s contained -1n tank cars,

storage tanks, etc. i

In order that the invention may be fully understood, reference will now be made to the accompanying drawings, in which: Figure-1 is a broken elevation partly in section of a tank equipped with one form of" the device.-

' F1g..2.1s an enlarged vertical sectional view of the relief valve employed constituting an important feature of the invention.

Fig. 3-is an inverted plan view of the re lief valve seat.

Fig. 4 is a plan view of the valve plug. Fig. 5is abroken elevation partly in sec-i tion of atank equipped with anotherform ofrelief valve.

Fig. 6 is' a vertical, .sectionalview of the relief valve disclosed on Fig. 5.

Fig. 7 is an inverted,'cross section on line Referring .nowin detail to the-various parts,-1 designates a tank for holding gasolene or other volatile oils, said-tank being surmounted by a dome 2.

i 3 designates thecondenser for liquefying the'gas arising from theoil in the tank 1, a pipe 5 extending from the dome 2 to the i117. teriorof thecondenser 3 for the purpose of. leading the gas from the former to the latter. The inlet end of the pipe 5 has a bell-mouth 7, so that thegas may readily enter said pipe. I

The. condenser 3 may be made in any suitable .form and ofany suitable material. In practice, we prefer, to employ an outer sheet metal shell 9,. an inner sheet metal chamber 11,:and insulation ofasbestos 12, and felt 14 to fill the space between the chamber 11 and the shell The pipe is also insulated with asbestos 15 andfelt 16.

17 designates a self-opening starter-valve having a vent 20 leading from the chamber 11to the'atmosphere.

22' designates a return pipe leading from the lower portion of theichamber 11-to the upper portion of the tank 1 and provided with a check valve 24, adapted to be openedby the liquefiedgas when the samehas accumulated. to a certain depth within said chamber 11.. l

25 designates the relief-valve whereby; a

portion of the gas in the chamber 11 may escape on reaching a .predetermined pressure. Said relief-valve 25embodies a casing 28 having an outlet 29, and an inlet pipe 30 leading from the upper'portion of the chamby a valve seat 32 having segmental grooves 34 1n 1ts lower face to receive corresponding segmental projections 35 on the valve .plu

37, whichflis provided at its upper side wit a felt or other suitable cushion .38 adapted to bear againstthe cushion valve seat 32. 1

The valve v plug37 is providedwith laterally eirtending arms 40 having sleeves 42 slid-- ably-mounted on guiderods 45, extending downwardly into the casing .28 from the upper. end 46 thereof where said guide rods 45-are fixed. Y

' 47 designates amember arranged beneath the valve. plug 37 and provided with sleeves 49 slidably-mounted upon the rods 45.- The member 47 is provided with a central pocket 50 in which a secondary spring 52 is seated.

Said spring 52 is placed in-the pocket: 50 under compression, so that .it will bear against the underside of the valve plug 37 and hold the same in closedposition against the valve seat 32. I The member 47 is yieldably-held against the valve plug 87 by a primary coil spring 54, bearing against said .member .47 and a yoke 56 adjustably-secured to the lower ends of the guide rods 45 by lock nuts 58.

.60 designates a cup-shaped deflector loosely surrounding the valve 25 to deflect the gas discharged therefrom upwardly away from the tank 1. Thus should the tank-car become wrecked and discharg 70 her 11-. The-inlet pipe 30 projects through i the top of the casing28 and is surrounded ing gas be ignited, the flame is carried away from the tank 1 and danger of a fire from this cause is averted. The upper, open end of the cup is covered by a wire screen 62, which excludes cinders' and other foreign matter.

In practice, the starter-valve 17 is initially in open position to permit a circulation of the gas from the dome 2 to the chamber 11 through the pipe 5. After the gas attains a predetermined pressure within the chamber 11, it closes the starter-valve 17 which cuts off the flow of gas to atmosphere. As only a very light pressure is required to close the valve 17, the waste of gas through the vent 20 is insignificant. After being entrapped in the chamber 11 on the closure of the'valve 17, the gas expands within said chamber, the walls of which are protected from the heat of the outer atmosphere by the shell 9 and the insulation 12 and -14. Thus as the gas impinges against the relatively cool walls of the chamber 11, it becomes liquefied and flows to the bottom of said chamber where a small amount is permitted to accumulate before returning to the tank 1 through the pipe 22. This small amount of gasolene covering the bottom of the chamber assists in liquefying the gas as" it discharges from the outlet end of the pipe 5.

Should unusual conditions arise, such as a fire adjacent to the tank, and tend to cause the pressure within the chamber 11 to approach the danger point, the gas is permitted to escape through the relief-valve 25, the plug 37 of which is forced from its. seat against the action of the spring 54 and allows the gas to escape through the ports 61 between the ends of the segmental projections 35. v 7

Should jarring, such as is caused by the tankcar passing over the ends of two rails, cause the member 47 to move downwardly and compress the primary spring 54, the valve is still held to its seat by expansion of the spring 52 and-hence there will be no loss of gas by accidental opening of the relief valve.

In the other form disclosed by Figs. 5 to 7, inclusive, the construction is, substantially the same as above described as indicated by similar reference numerals with ex ponents, the'chief differences being that the relief valve is inverted so that its outlet 29 is turned upwardly away from the tank 1*, and thus obviates the necessity of the deflector 60 disclosed on Fig. 1. The outlet 29 is covered by a screen 62 to exclude cinders, etc., from the interior of the casing 28 Fine dust and other debris passing through the screen 62 is caught in a pan 64 suspended by pins 65'from the upper portion of the casing 28 A screen 66 extends from the periphery of the pan 64 to the interior surface of the shell 28 to intercept any small particles which might pass through the screen 62 and not enter the pan 64.

From the foregoing description, it is apparent that an apparatus well adapted for the purpose intended has been provided and While two forms of the invention have been 'shown, the right is reserved to make such changes in the construction, arrangement,-

inlet and outlet ports, a'valve plug to close one of said ports, a yieldably supported member tonormally hold said valve plug in closed position, and resilient means interposed between said member and the valve plug to hold the latter to its seat in case said member should be jarred away from said valve plug. V

2. A valve consisting of a casing having inlet and outlet ports, a valve plug to close one of said ports, a spring pressed member to yieldably hold said valve plug in closed position, and resilient means interposed between said member and the valve plug to hold the latter to its seat in case said memher should be jarred away from said valve plug.

3. A valve consisting of a casing having inlet and outlet ports, a valve plug to close one of said ports, a yieldably supported.

member provided with a pocket and adapted to normallyhold said valve plug in closed position, and a spring disposed'within the pocket and bearing against the valve plug to hold the latter to its seat in case said member should be jarred away from said valve plug. V

4. A valve consisting of a casing having inlet and outlet ports, a valve plug to close one of said ports, sleeves to said valve plug, guides fixed to the valve casing and slidably embraced by said sleeves, and yieldable meansto normally hold'said valve plug in closed position. 7

5. A valve consisting of a casing having inlet and outlet ports, a valve plug to close one of said ports, a yieldably supported member to normally hold said valve plug in 'inlet and outlet ports, a flexible valve seat to said valve plug and adapted to enter the grooves in the valve seat, flexible means fixed to the valve plug and adapted to engage the flexible seat, and a cup-shaped deflector surrounding the valve.

In testimony whereof We afiix our signatures, 1n the presence of two WltIlGSSGS;

LOUIS MASGHEK. GAMILLUS B. HIGGINS.

Witnesses:

F. G. FISCHER, L. J. FISOHEIL

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