US847944A - Pressure-reducing valve. - Google Patents

Description

No. 847,944. I PATBNTED MAIL-19, 1907. J. HUBNER & I. MAYER. PRESSURE REDUCING VALVE.

APPLICATION FILED FEB. 19, 1906.

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UNITED STATES PATENT OFFIOEQ JOSEF HUBNER AND ISIDOR MAYER, OFTIENNA, AUSTRIA-HUNGARY.

PRESSURE-REDUCING VALVE.

Specification of Letters Patent.

Patented. March 19, 1907.

Application filed February 19,1906- Serial No. 301,917-

To all whom it may concern:

Be it known that we, JosEF Hi'JBNER and Isrnon MAYER, both subjects of the Emperor of Austria-Hungary, and residing at Muthjasse 64, (Waatbahnhof-Heilijenstaat,) Vienna, Austria-Hungary, have invented certain new and useful Improvements in Pressure-Reducing Valves; and we do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable ot ers skilled in the art to which it appertains to make and use the same.

Pressure-reducing valves with throttling devices actuated by means of adjustably weighted or loaded diaphragms or pistons have the disadvantage that the adjusted lowpressure is not maintained constant during working, as with these valves the pressure falls as the consumption of steam increases. The cause of this deficiency is, on the one hand, that the load alters or slackens when the valves are opened and, on the other hand, that an expansion of the dia hragm occurs which increases with the stro e of the valve and must be overcome by the loading. Moreover, the high-pressure steam flowing into the low-pressure chamber causes an increase of pressure which becomes greater with increased consumption and extends to below the diaphragm or piston. Hereby also the diaphragms or pistons are prevented .from opening the throttling devices connected with them to an extent corresponding to the consumption. The present invention obviates this defect in pressure-reducing valves and enables them in all cases, even to the largest consumption of steam, to open a passage to the inflowing pressure medium necessary for maintaining the adjusted low pressure.

The device consists, substantially, of a suction-nozzle arranged in the lowressure chamber of the valve and on whic a suctional action is exercised by the high-pressure steam flowing into the low-pressure chamber or the low-pressure steam flowing away, this suctional effect extending through a connecting-passage to the under surface of the diaphragm or piston and in consequence of the owerful suctional action on these llich corres onds to the consumption,

assists or replaces t e loading thereof.

1 In'the accompanying drawing three pressure-reducing valves of different and known kinds which are furnished with the suctionnozzle arranged according to this invention are shown in sectional elevation.

Figure 1 represents a pressure-reducing valve the throttling device of which is in the form of a double-seated valve and is connected with a spring-loaded diaphragm b. The space 0 below the diaphragm is connected, by means of a passage (1, with the suction-nozzle 6, arranged in the low-pressure chamber. The action of this device will be seen at once from the drawing.

By the arrangement of the suctionnozzle e a suctional action is produced which increases with increasing consumption and is caused by the low-pressure steam flowing past. This action extends through the connectiond to the space 0. Hereby a reduction of pressure is. produced in that space, so that the diaphragm, which is now partially relieved, can

all with the valve attached to it without hindrance and open the requisite passage.

In Fig. 2 a piston 6 instead of the diaphragm is connected with the double-seated throttle-valve. In this form of the invention the connection 6. is placed in a spindle of the valve 0, which for this purpose is formed with a boring which likewise contains the suction-nozzle e, that opens into the lowpressure chamber. The suction-nozzle is so constructed that partially-exhausted highpressure steam conveyed into the suctionnozzle at 6 comes into action.

In Fig. 3 the piston is connected with an auxiliary valve 1, and this valve with asingle, seat principal valve 2, which can be relieved by pressure beneath 3, and the action of which is known. cone carries a piston 4-, above which during the taking of steam through the opened auxiliary valve 1 the high-pressure steam enters and relieves the principal valve. From this space a portion of the steam flows through t e suction-nozzle to the low-pressure chamber and produces the necessary reduction of pressure in the chamber 0. The pistons of these valves can be loaded either by springs, throttled steam, or in any other known manner. Beneath the piston or diaphragm the hi gh-pressure steam flowing in alwayscauses a certain increase of ress'ure which prevents the opening of the va ve and leads to the falling of the adjusted low pressure.

By the suctional action of the device which corresponds to the consum tion at anytime not only is the objectionab e high pressure in The single-seated valvethe chamber 0 avoided, but, if necessary, the diminishing loading also supplemented:

What We claim, and desire to secure by Letters Patent, is-

1. A pressure-rmlucing, valve having a loaded throttling element provided With a fluid-pressure-aetuated element, a suctionchamber in which said fluid-pressureactuated element operates, a high-pressure Chamber, a low-pressure chamber communicating therewith, and a suction-duct leading from the suction chambor to the low-pressure chamher, for the purpose set forth.

2. A pressure-reducing valve having a loaded throttling element provided with a fluid-pressure-actuated element, a suction chamber in which said fluid-pressu1'e-aetuated element operates, a high-pressure chamber, a low-pressure chamber communicating therewith, a suction-duct leading from the suction-chamber and a suction-nozzle form- -ing the discharge end of said duct and dis-

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