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AT76030B - Performance indicator for Venturi water meter. - Google Patents

Performance indicator for Venturi water meter.

Info

Publication number
AT76030B
AT76030B AT76030DA AT76030B AT 76030 B AT76030 B AT 76030B AT 76030D A AT76030D A AT 76030DA AT 76030 B AT76030 B AT 76030B
Authority
AT
Austria
Prior art keywords
water meter
performance indicator
venturi water
vessel
mercury
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT76030B publication Critical patent/AT76030B/en

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  • Measuring Volume Flow (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  LeistungsanzeigerfürVenturiwassermesser. 
 EMI1.1 
 besonders gestaltet ist, um eine der das Venturirohr durchflie enden Wassermenge proportionale Änderung des Quecksilberspiegels in dem anderen Gefäss zu erzielen, sind die   beiden Gefässe getrennt   voneinander angeordnet und durch ein kleines Leitungsrohr miteinander verbunden. 



   Diese Anordnung hat den Nachteil, dass einerseits das   Leitungsrohr   infolge auftretender Undichtigkeiten zu Störungen Veranlassung geben kann, da bei Quecksilberverlust der Leiatungsanzeiger nicht mehr richtig anzeigt und andererseits der Apparat wegen der beiden getrennten Gefässe wenig handlich und seine Anbringung umständlich ist. 



   Der Erfindung gemäss wird dieser   Ubelstand   dadurch vermieden, dass bei ineinander angeordneten und durch ein Tauchrohr miteinander verbundenen Gefässen, um die Vorteile der zur Durchflussmenge proportionalen Verstellung des Schwimmers beizubehalten das   Innengefäss,   von der Nullinie aus gemessen, nur um den Betrag weiter in das Aussengefiiss hineinragt, für welchen ohnehin eine proportionale Verstellung des Schwimmers nicht stattfinden kann, wegen der Unmöglichkeit, das eine Gefäss nach der ins unendlich verlaufende Kurve zu formen, welche dessen Gestalt bestimmt. 
 EMI1.2 
 Tauchrohr beginnt. zweckmässig derartige Abmessungen, dass der Querschnitt der beiden Quecksilbersäulen gleich gross ist, so dass der Quecksilberspiegel sich proportional zum Quadrat der Durchflussmenge im Venturirohr verstellt.

   Eine entsprechende Teilung des Registrierbandes trägt diesem Umstande Rechnung. Von dem Tauchrohr an erhält das Aussengefäss den zur Erzielung einer proportionalen Vorstellung berechneten Querschnitt plas dem Querschnitt des Tauchrohres. 



   Die Zeichnung zeigt eine beispielsweise Ausführungsform der Erfindung im Längsschnitt. 



   Das zylindrische Quecksilbergefass a, in dem der Schwimmer b sich befindet, steht durch ein Tanchrohr   c mit   dem   Aussengefäss     d   in Verbindung. Mittels eines an ihm vor- 
 EMI1.3 
 angeschlossen. An dem Schwimmer ist in bekannter Weise eine Zahnstange k angebracht, die in Eingriff mit einem auf einer Welle n sitzenden Zahnrad m steht. Die Welle übertragt die Bewegungen des Schwimmers auf das Anzeigewerk. 



   Von der Nullinie A aus gerechnet bewegt sich der Quecksilberspiegel im Gefass a   zunächst nicht   in einfachem Verhältnis zu der Durchflussmenge, sondern im quadratischen Verhaltenis zu derselben, und zwar solange. bis der   Quecksilberspiegel   im Gefäss d so weit gesunken Ist. dass er bis auf das Tauchrohr c vollkommen von Quecksilber frei ist. Für diese unproportionale Weglänge, die im Verhältnis zur   Gesamtatisschlaglänge   sehr   genng     15t. SInd   die beiden Gefässe   zyiindnsch   geformt   und derart bemessen. daB der Querschnitt   der Quecksilbersäulen in beiden Gefässen gleich gross ist. 
 EMI1.4 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Performance indicator for Venturi water meter.
 EMI1.1
 is specially designed to achieve a change in the mercury level in the other vessel that is proportional to the amount of water flowing through the venturi tube, the two vessels are arranged separately from one another and connected to one another by a small pipe.



   This arrangement has the disadvantage that, on the one hand, the conduit can cause malfunctions as a result of leaks, since the line indicator no longer displays correctly if there is a loss of mercury and, on the other hand, the device is difficult to handle and its installation is difficult because of the two separate vessels.



   According to the invention, this inconvenience is avoided in that, when the vessels are arranged one inside the other and connected to one another by a dip tube, in order to maintain the advantages of the float adjustment proportional to the flow rate, the inner vessel, measured from the zero line, protrudes only the amount further into the outer vessel for which a proportional adjustment of the float cannot take place anyway, because of the impossibility of shaping the one vessel according to the infinite curve which determines its shape.
 EMI1.2
 Immersion tube begins. appropriately such dimensions that the cross section of the two mercury columns is the same size, so that the mercury level is adjusted proportionally to the square of the flow rate in the Venturi tube.

   A corresponding division of the recording tape takes this into account. From the immersion tube on, the outer vessel receives the cross section plas calculated to achieve a proportional representation of the cross section of the immersion tube.



   The drawing shows an example embodiment of the invention in longitudinal section.



   The cylindrical mercury vessel a, in which the float b is located, is connected to the outer vessel d through a tan pipe c. By means of a
 EMI1.3
 connected. A toothed rack k is attached to the float in a known manner and is in engagement with a toothed wheel m seated on a shaft n. The wave transmits the swimmer's movements to the indicator.



   Calculated from the zero line A, the mercury level in the vessel a does not initially move in a simple relationship to the flow rate, but in a quadratic relationship to the same, for as long. until the mercury level in vessel d has dropped that far. that it is completely free of mercury except for the immersion tube c. For this disproportionate path length, which in relation to the total length of the stroke is very short 15t The two vessels are cylindrical in shape and dimensioned in this way. that the cross-section of the mercury columns in both vessels is the same.
 EMI1.4
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

**WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT76030D 1915-04-17 1916-04-04 Performance indicator for Venturi water meter. AT76030B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE76030X 1915-04-17

Publications (1)

Publication Number Publication Date
AT76030B true AT76030B (en) 1919-04-10

Family

ID=5637313

Family Applications (1)

Application Number Title Priority Date Filing Date
AT76030D AT76030B (en) 1915-04-17 1916-04-04 Performance indicator for Venturi water meter.

Country Status (1)

Country Link
AT (1) AT76030B (en)

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