DE566488C

DE566488C - Pressure reducer

Info

Publication number: DE566488C
Application number: DEK124553D
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-03-08
Filing date: 1932-03-08
Publication date: 1932-12-16

Description

Es sind bereits Druckminderer mit Quecksilberfüllung, Schwimmer und Überlaufgefäß bekannt, bei denen mit dem Schwimmer ein luftberührtes Ventil verbunden ist, das durch die Bewegung des Schwimmers gesteuert wird. Bei einer bestimmten Höhenlage des Schwimmers im Überlaufgefäß kommt das Ventil zum Abschluß, derart, daß Quecksilber aus dem Gefäß nicht ins Freie treten kannThere are already pressure reducers with a mercury filling, float and overflow vessel known, in which an air-wetted valve is connected to the float, which through the movement of the swimmer is controlled. This happens when the float is at a certain height in the overflow vessel Finally, a valve in such a way that mercury cannot escape from the vessel

»ο und dadurch Quecksilberverluste vermieden werden.»Ο and thus avoid mercury losses will.

Bei dem bekannten Druckminderer ist auf dem Gestänge des Betätigungsschwimmers für das Hauptventil ein Ventil angebracht, welches bei einer bestimmten Höhenlage des Schwimmers zum Abschluß kommt und die Verbindung zwischen dem Minderdruckraum des Druckminderers und dem Schwimmerraum desselben abschließt, sobald Vakuumbildungen in ersterem eintreten. Hierdurch wird bei Vakuumbildungen das Überlaufen von Quecksilber aus dem Schwimmerraum in den Minderdruckraum vermieden.In the known pressure reducer is on the rod of the actuating float for the main valve a valve is attached, which at a certain altitude of the Float comes to a conclusion and the connection between the reduced pressure space of the pressure reducer and the float space it closes as soon as vacuum formations occur in the former. Through this the overflow of mercury from the float chamber in the reduced pressure space avoided.

Druckminderer dieser Art haben sich imPressure reducers of this type have proven themselves in

«5 allgemeinen sehr gut bewährt. In einigen besonders schwierigen Fällen haben sie aber ihren Zweck nicht ganz vollkommen erfüllt. Die Ursache war, daß sich das genannte luftberührte Ventil nicht immer vor Verschmutzungen durch auf dem Quecksilber schwimmende, spezifisch leichtere Bestandteile schützen ließ. Bei plötzlichen und sehr schnell auftretenden Vakuumbildungen im Minderdruckraum gelangte das Ventil zwischen Minderdruck- und Schwimmerraum nicht schnell genug zum Abschluß.«5 generally proven very well. In some especially In difficult cases, however, they have not quite fully served their purpose. The cause was that said valve that comes into contact with air is not always protected from contamination by specifically lighter components floating on the mercury let protect. In the event of sudden and very rapid vacuum build-ups in the low pressure room the valve between the low pressure and the float chamber did not close quickly enough.

Der Zweck der vorliegenden Erfindung ist nun, diese Nachteile zu beseitigen und einen Druckminderer zu schaffen, der eine genügende Sicherheit gegenüber Quecksilber-Verlusten gewährleistet.The purpose of the present invention is now to eliminate these drawbacks and one To create pressure reducers that provide sufficient security against mercury losses guaranteed.

Die Zeichnung stellt den Erfindungsgegenstand im Schnitt dar. Der noch nicht entspannte Dampf (bzw. Luft oder Gas, im folgenden Dampf genannt) tritt bei 1 in den Druckminderer ein ynd verläßt denselben entspannt bei 3. Die Entspannung wird durch das Regelventil 2 in Verbindung mit dem Hebelwerk 4, dem Gestänge 5 und dem Schwimmer 6 in bekannter Weise hervorgerufen. Dabei steht das Schwimmergehäuse 7 in Verbindung mit dem Überlaufgefäß 13. Der Höhenunterschied H zwischen dem Ouecksilberspiegel a-b im Schwimmergehäuse 7 und dem Ouecksilberspiegel c-d im Überlaufgefäß 13 entspricht dabei der Höhe des gewünschten Minderdruckes in Millimeter Quecksilbersäule gemessen. Die Quecksilbersperrventile 8 und 14 sind bereits durch das Patent 505 137 geschützt; letzteres Organ ist aus praktischen Gründen direkt mit Auftriebsschwimmer 15 verbunden. The drawing shows the subject of the invention in section. The not yet expanded steam (or air or gas, hereinafter referred to as steam) enters the pressure reducer at 1 and leaves the same expanded at 3. The expansion is through the control valve 2 in connection with the lever mechanism 4, the linkage 5 and the float 6 caused in a known manner. The float housing 7 is in connection with the overflow vessel 13. The height difference H between the Oueckilberspiegel ab in the float housing 7 and the Ouecksilberspiegel cd in the overflow vessel 13 corresponds to the level of the desired reduced pressure measured in millimeters of mercury. The mercury shut-off valves 8 and 14 are already protected by patent 505 137; the latter organ is directly connected to buoyancy float 15 for practical reasons.

Wenn man annimmt, daß die Organe 8 und 14 versagen, so ergibt sich für die diesen zugehörigen Ergänzungsorgane folgende Wirkungs weise:If one assumes that organs 8 and 14 fail, the result is for those associated with them Complementary organs the following mode of action:

Unter dem Schwimmergehäuse 7 ist, durch eine Scheidewand getrennt, ein Gehäuse 20A housing 20 is located below the float housing 7, separated by a partition

Claims

appropriate. In the latter there is a float 21 which is connected to the valve 2 :. As long as the normal reduced pressure is present in the reduced pressure space 9 and the eye float space 7, which is in open connection S with 9, the silver level in FIG. 7 does not drop significantly below the line . In this case, the float 21 is completely surrounded by the mercury and, due to its lower specific weight, has buoyancy. This opens the valve 22 and the mercury circulation between 7 and 20 can take place unhindered. If the pressure in 9 or 7 rises above the intended level, the Oueckilberspiegel in 7 is pushed down below the line from . The mercury can, under certain circumstances, be squeezed completely out of the housing 7, and the mercury level can fall as far as the line ef in the housing 20. Here, however, the float 21 loses its buoyancy and falls downwards, thereby closing the valve 22. This interrupts the connection between the housings 7 and 20, and no mercury can get into the open air through the pipes 12 and 12 and the overflow vessel 13 as a result of increasing pressure, even if the valve 14 should fail. If the pressure in 7 drops, mercury flows back from 13 to 20, the float 21 is buoyant again, the valve 22 opens and releases the connection between 20 and 7, which is necessary for the normal operation of the pressure reducer.
A float body 23 is loosely embedded in the Ouecksilbersteigrohr 12, the lower surface of which is designed like a valve cone and seals on the valve seat 24. During normal operation, the float body 23 in the tube 12 is lifted by the mercury so that it lies under the stop disk 25. If the mercury rises further in the vessel 13, the body 23 is completely flooded by the mercury. * 5 If a vacuum occurs in room 9 and the connected room 7, the mercury is sucked out of the vessel 13 and the pipe 12 to room 7. Here, the Ouecksilberspiegel falls within 12 and not likely with it the float body 23 by the line ab in 12. The float body thereby finally, with its lower surface sealingly on the valve seat 24 in the tubes 12. The mercury may then continue to 7 suctioned and there is no risk that mercury will pass from the space 7 to the reduced pressure space 9, even if the valve 8 does not close completely tightly and does not close early enough in the event of sudden vacuums.

According to the current state of the art, the valve parts 22, 23 and 24 can not rusting material, which does not amalgamate even in mercury. These valve parts are also not subject to wear, since the above The abnormal operating processes described only occur and themselves in very rare cases in normal operations, the valves 22 and 23 are in the rest position.

PATENT CLAIMS:

i. Pressure reducer with mercury filling, float and overflow vessel, characterized in that under the eyewimmer room (7) a second eyewimmer room (20) is attached, in which there is a float (21), which when the mercury level falls in (20) the valve (22) closes, whereby the open connection between (7) and (20) is interrupted.

2. Pressure reducer according to claim 1, characterized in that a float (23) is embedded in the mercury riser pipe (12), the lower surface of which seals on the valve seat (24) when the float is in a corresponding low position due to vacuum formation in the reduced pressure chamber of the pressure reducer got.

1 sheet of drawings