DE417287C - Closing element with safety channel for pressure gauges, especially for indicators - Google Patents

Closing element with safety channel for pressure gauges, especially for indicators

Info

Publication number
DE417287C
DE417287C DEM86440D DEM0086440D DE417287C DE 417287 C DE417287 C DE 417287C DE M86440 D DEM86440 D DE M86440D DE M0086440 D DEM0086440 D DE M0086440D DE 417287 C DE417287 C DE 417287C
Authority
DE
Germany
Prior art keywords
indicators
closing element
pressure gauges
safety channel
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEM86440D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
H Maihak AG
Original Assignee
H Maihak AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by H Maihak AG filed Critical H Maihak AG
Priority to DEM86440D priority Critical patent/DE417287C/en
Application granted granted Critical
Publication of DE417287C publication Critical patent/DE417287C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26Details or accessories

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Description

Abschlußorgan mit Sicherheitskanal für Druckmesser, besonders für Indikatoren. Bei Apparaten., die hohen Druck messen sollen, liegt die Gefahr vor, daß beim öffnen des Absperrorgans, z. B. Absperrhahn eines Manometers oder Indikators, der volle Druck plötzlich oder stoßweise auf die Einzelteile des Apparates zur Wirkung kommt und dadurch die Apparate beschädigt oder zertrümmert werden. Dies kann herbeigeführt werden entweder durch plötzliches öffnen des Absperrorgans, durch Wasserschlag oder durch Explosion der zwischen Meßapparat und Absperrorgan befindlichen oder zurückgebliebenen Gasmenge. Der Erfindungsgegenstand soll nun eine Schutzvorrichtung gegen solche plötzlichen Druckstöße darstellen.Closing organ with safety channel for pressure gauges, especially for Indicators. In the case of devices that are supposed to measure high pressure, there is a risk of that when opening the shut-off device, for. B. stopcock of a manometer or indicator, the full pressure suddenly or intermittently on the individual parts of the apparatus takes effect comes and thereby the apparatus is damaged or smashed. This can be brought about are either by suddenly opening the shut-off device, by water hammer or by explosion of those located or left between the measuring device and the shut-off device Amount of gas. The subject of the invention is now intended to provide a protective device against such represent sudden pressure surges.

Im Absperrorgan H, der Einfachheit halber ist als Beispiel ein Hahn gewählt, wird an geeigneter Stelle ein Sicherheitskanal lt als Nut, Bohrung o. dgl. angeordnet, der eine Verbindung zwischen dem Druck- oder Explosionsraum A, dem Indikator B und der Außenluft herstellt. Die Anordnung des Kanals muß so erfolgen, daß automatisch während des Öffnens des Absperrorgans die Verbindung zwischeu Explosionsraum und Indikatorraum hergestellt und gleichzeitig der Sicherheitskanal geschlosseg wird. Wie aus ,den Einzelstellungen des Hahnes (vgl. Abb.2) hervorgeht, ist in den Stellungen ,b und e, also zwischen der geschlossenen Stellung a und der ganz offenen Stellung d, die Verbindung mit der Außenluft durch den Sicherheitskanal I( hergestellt. Kanal K muß ganz geöffnet sein, ehe die Bohrung des Kükens sich zu öffnen beginnt (vgl. Abb.2b), damit die zurückgebliebenen Gase entweichen können, und muß geschlossen sein, bevor die Bohrung E des Kükens ganz offen ist. In Stellung c gelangt nur ein Teil der Druckluft oder Explosion durch den Hahn nach dem Meßinstrument B. Dadurch wird außerdem der Zeiger oder das Schreibgestänge des Meßinstrumentes schon angehoben, ehe der volle Druck durch die Iginlaf#@öffinung Ein dem Meßinstrument zur Wirkung kommt. Auf diese Weise wird auch die Massenbeschleunigung der Zeiger, Schreibhebel o. dgl., die sonst durch den plötzlichen Druckstoß entstehen würde, erheblich herabgesetzt. Die in Abb. 2a bis d daxgiestellten Verbindungen lassen sich mit dem bisher üblichen Indikatorhahn nicht herstellen. Bei schnellgehenden Indikatoren und hohem Druck ist aber ein solches Abschlußorgan erforderlich, da sonst eine Zerstörung des Schreibgestänges unvermeidlich ist.In the shut-off element H, for the sake of simplicity, a cock is chosen as an example, a safety channel is arranged as a groove, hole or the like at a suitable point, which creates a connection between the pressure or explosion space A, the indicator B and the outside air. The channel must be arranged in such a way that the connection between the explosion chamber and the indicator chamber is automatically established during the opening of the shut-off element and the safety channel is closed at the same time. As can be seen from the individual positions of the tap (see Fig. 2), in positions b and e, i.e. between the closed position a and the fully open position d, the connection with the outside air is established through the safety channel I (. K channel must be completely open before the bore of the plug begins to open (see. Figure 2b) so that the residual gases to escape and must be closed before the hole e of the plug is fully open. In position c reached only a part of the compressed air or explosion through the tap after the measuring instrument B. This also raises the pointer or the writing rod of the measuring instrument before the full pressure through the Iginlaf # @ opening in the measuring instrument comes into effect the mass acceleration of the pointer, writing lever or the like, which would otherwise arise from the sudden pressure surge, is considerably reduced Do not produce the usual indicator tap. In the case of fast-moving indicators and high pressure, however, such a closing element is necessary, since otherwise destruction of the writing rod is inevitable.

Claims (1)

PATENTANSPRUCH: Abschlußorgan für Druckmesser, besonders für Indikatoren, gekennzeichnet durch eine besondere Bohrung, einen Kanal o. dgl., welche während des öffnens oder Schließens ein vorübergehendes Ableiten des zu messenden Druckes, z. B. die Explosionswelle, an die Außenluft o. dgl. selbsttätig bewirkt, und somit das Meßinstrument o..dgl.Vor plötzlichen, stoßartigen Beanspruchungen im Augenblicke des öffnens oder Schließens bewahrt. PATENT CLAIM: Closing element for pressure gauges, especially for indicators, characterized by a special bore, a channel or the like. B. the explosion wave, to the outside air o. The like. Automatically caused, and thus the measuring instrument o..dgl.Vor sudden, jerky stresses at the moment of opening or closing.
DEM86440D 1924-09-21 1924-09-21 Closing element with safety channel for pressure gauges, especially for indicators Expired DE417287C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM86440D DE417287C (en) 1924-09-21 1924-09-21 Closing element with safety channel for pressure gauges, especially for indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM86440D DE417287C (en) 1924-09-21 1924-09-21 Closing element with safety channel for pressure gauges, especially for indicators

Publications (1)

Publication Number Publication Date
DE417287C true DE417287C (en) 1925-08-13

Family

ID=7320479

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM86440D Expired DE417287C (en) 1924-09-21 1924-09-21 Closing element with safety channel for pressure gauges, especially for indicators

Country Status (1)

Country Link
DE (1) DE417287C (en)

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