DE203928C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 203928 CLASS 47g-, GROUP

HÜBNER & MAYER in VIENNA.

Addendum to patent 159530 of November 18, 1902.

Patented in the German Empire on December 31, 1907 . Longest duration: November 17, 1917.

The invention relates to a further embodiment of pipe rupture valves after Patents 159530, by which the sensitivity of the valves within wide limits can be set.

The essence of the invention is that the self-closing body through the flowing pressure medium exerted suction according to the desired sensitivity reduced to zero and furthermore into a direction in the sense of the final movement Pressure effect can be converted ..

Incidentally, this process allows the patent 159530 to be maintained permanently permanent vapor load of the self-closing body unaffected and takes place alongside and independently of this only for the purpose of regulating the sensitivity.

In the drawing, two exemplary embodiments of the invention are shown in FIGS. 1 and 2 shown perpendicular section.

The self- closing body α sits, as in the patent 159530, leaving a narrow annular gap on a hollow pin b, whose bore c leading into the open air or into a reduced pressure space is closed by the valve d.

The suction effect of the flowing conduit is initiated on the self-closing body a in that the advantageously slightly enlarged lower surface e extends almost to the shoulder / pin b , whereby an annular gap g is formed between the surfaces e and f.

At this annular gap g , the flow of the pressure medium creates a suction effect directed in the opposite direction to the closing movement, which makes it difficult to close the steam-loaded shut-off body, thus making it less sensitive.

The reduction of the suction effect mentioned down to zero and its reversal into the opposite and the result that can be achieved with it. the sensitivity of the valve is now increased by introducing part of the flowing pressure medium into the annular gap g.

The larger this proportion of the flowing pressure medium, the smaller it becomes low pressure occurring in the annular gap, which is also completely destroyed and finally, when the amount introduced has reached a corresponding level, it is converted into overpressure can be whose growth facilitates the closing of the shut-off and accordingly increases the sensitivity of the valve.

In the embodiment according to FIG. 1, the reduction or elimination of the reduced pressure arising in column g takes place through a guide sleeve of the self-closing

slidable ring enclosing the body h. This ring is hinged to the eyes k of a forked lever I by means of two lobes i. This lever is attached to the outwardly leading shaft m and allows, as can be easily seen, a raising and lowering of the. hanging ring k. In the raised position, the suction effect described occurs undisturbed.

ίο However, the more the ring h is lowered, the greater the proportion of the pressing means which - flowing in between the ring h and the shoulder f - is passed into the annular gap g . It can be seen without further ado that this proportion of the pressure medium reduces the reduced pressure in the gap g and, as the ring h continues to be lowered, ultimately not only completely destroyed it, but transformed it into the opposite. The sensitivity of the valve becomes greater the deeper the ring h is lowered.

In FIG. 2, the pin b shows an opening n which is presented to the oncoming pressure medium and from which one or more connecting channels 0 lead to the annular gap g. A laterally introduced screw spindle ft enables the throttling and finally also the complete closure of the connection between the opening η and the connecting channels 0.

The effect of this facility is readily apparent. If the connection is closed by the spindle ft , then the access of the flowing pressure medium to the annular gap g is prevented, so the undisturbed suction effect occurs at the gap g , which causes the maximum degree of insensitivity of the steam-loaded closing body.

The more the connection between η and 0 is opened by screwing back the spindle ft, the greater the proportion of the pressure medium introduced into the annular gap g, the lower the reduced pressure prevailing in it, which is ultimately converted into an overpressure, which at the same time causes the The sensitivity of the pipe rupture valve can be increased at will.

For the concept of the invention, it is irrelevant in what way the feeding of the in the annular gap introduced portion of the flowing pressure medium is brought about and how the quantity regulation of this share is carried out; Rather, it is essential that the im Column g in the manner described by the action of the pressure medium flowing past produced low pressure for the purpose of regulating the sensitivity through introduction a controllable proportion of the flowing pressure medium correspondingly reduced, completely destroyed and transformed to the contrary.

Claims (1)

PateNT CLAIM: Pipe rupture valve closing by increasing the steam flow pressure with a valve closing off an external line according to patent 159530, characterized in that a device is arranged for the purpose of regulating the sensitivity, through which part of the flowing conduit means in between the lower part (e) of the self-closing body and the Paragraph ff) of the pin (b) supporting it, the existing annular gap (g) can be passed. 1 sheet of drawings.