DE1297883B - Arrangement for determining the liquid level in rotating hollow bodies - Google Patents
Arrangement for determining the liquid level in rotating hollow bodiesInfo
- Publication number
- DE1297883B DE1297883B DE1963B0074841 DEB0074841A DE1297883B DE 1297883 B DE1297883 B DE 1297883B DE 1963B0074841 DE1963B0074841 DE 1963B0074841 DE B0074841 A DEB0074841 A DE B0074841A DE 1297883 B DE1297883 B DE 1297883B
- Authority
- DE
- Germany
- Prior art keywords
- hollow body
- wall
- arrangement
- rotating
- liquid level
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
Die Erfindung betrifft eine Anordnung zur Bestimmung der Flüssigkeitsstandhöhe in rotierenden Hohlkörpern nach Patentanmeldung P 12 85759.9 (deutsche Auslegeschrift 1 285 759) in einer Abwandlung, die es gestattet, die Messung auch vorzunehmen, wenn die Flüssigkeit durch erhöhte Rotation auf der Innenwand des rotierenden Hohlkörpers eine geschlossene Flüssigkeitsschicht bildet. The invention relates to an arrangement for determining the liquid level in rotating hollow bodies according to patent application P 12 85759.9 (German Auslegeschrift 1 285 759) in a modification that allows the measurement to be carried out when the liquid by increased rotation on the inner wall of the rotating hollow body forms a closed liquid layer.
Nach der Hauptpatentanmeldung sind in einem rotierenden Hohlzylinder, in dem die Flüssigkeit nur einen Teich bildet, fest an der Innenwand des Hohlkörpers axial hintereinander zwei voneinander und zur Innenwand des Hohlkörpers durch eine Brücke isolierte Elektroden angeordnet, die einen Abstand im Bereich von 1 bis 10 mm von der Innenwand besitzen. Durch Anlegen einer Gleich- oder Wechselspannung an die Elektroden ergeben sich Gleichspannungsimpulse bzw. Wechselspannungsimpulsgruppen als Maß fiir die Flüssigkeitsstandhöhe im rotierenden Zylinder. According to the main patent application, in a rotating hollow cylinder, in which the liquid only forms a pond, firmly attached to the inner wall of the hollow body axially one behind the other two from each other and to the inner wall of the hollow body through one Bridge insulated electrodes placed with a spacing ranging from 1 to 10 mm from the inner wall. By applying a direct or alternating voltage DC voltage pulses or alternating voltage pulse groups result at the electrodes as a measure of the liquid level in the rotating cylinder.
Wird eine bestimmte Rotationsgeschwindigkeit überschritten, so breitet sich die Flüssigkeit über die Innenwand des rotierenden Hohlkörpers aus und bildet eine geschlossene Flüssigkeitsschicht. Um auch in diesem Fall bei schneller rotierenden Hohlkörpern den Flüssigkeitsstand messen zu können, wird in Abwandlung der Anordnung nach Patentanmeldung P 14 73 022.4 vorgeschlagen, die Messung so vorzunehmen, daß die mit der Dicke der Flüssigkeitsschicht veränderliche Kapazität zwischen den in bekannter Weise mit einem isolierenden Überzug versehenen und an eine Wechselspannung gelegten Elektroden mit Hilfe elektronischer Meßglieder meßbar ist. If a certain speed of rotation is exceeded, it spreads the liquid over the inner wall of the rotating hollow body and forms a closed liquid layer. To also in this case with faster rotating To be able to measure the liquid level of hollow bodies is a modification of the arrangement proposed according to patent application P 14 73 022.4 to carry out the measurement so that the capacitance, which varies with the thickness of the liquid layer, between the in as is known, provided with an insulating coating and connected to an alternating voltage placed electrodes can be measured with the help of electronic measuring elements.
Gemäß einer Weiterbildung der Erfindung erfolgt die Übertragung des Wechselstromes, der zur Messung der Kapazität in bekannter Weise benötigt wird, über den Wellenstumpf des rotierenden Hohlzylinders durch einen Zylinderkondensator, der aus einem rotierenden Teil im Wellenstumpf des Hohlkörpers und einem ruhenden Teil im Lagerinnern des Hohl- körperlagers besteht. Diese Art der Übertragung ist weniger störanfällig als eine Schleifringübertragung und nicht so kostspielig wie die Anwendung von Quecksilberübertragern. According to a development of the invention, the transmission of the Alternating current, which is required to measure the capacitance in a known manner, via the stub shaft of the rotating hollow cylinder through a cylinder capacitor, which consists of a rotating part in the stub shaft of the hollow body and a stationary part Part inside the bearing of the hollow body bearing exists. This type of transfer is less prone to failure than a slip ring transmission and not as expensive as the use of mercury transmitters.
Besonderen Nutzen bringt die Erfindung bei ihrer Anwendung in den Trockenzylindern von Papiermaschinen, wo sie eine bessere Wärmeausnutzung ermöglicht und zu geringerem Energieverbrauch führt. The invention brings particular benefit when used in the Drying cylinders of paper machines, where it enables better heat utilization and leads to lower energy consumption.
Durch die Überwachung der Kondensatbildung mit Hilfe der erfindungsgemäßen Anordnung läßt sich die Gefahr des Herabbrechens der Trockenzylinder mit ihren weitreichenden Folgen vermeiden.By monitoring the formation of condensate with the aid of the invention Arrangement can reduce the risk of the drying cylinder breaking off with its far-reaching Avoid Consequences.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1963B0074841 DE1297883B (en) | 1963-12-28 | 1963-12-28 | Arrangement for determining the liquid level in rotating hollow bodies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1963B0074841 DE1297883B (en) | 1963-12-28 | 1963-12-28 | Arrangement for determining the liquid level in rotating hollow bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1297883B true DE1297883B (en) | 1969-06-19 |
Family
ID=6978418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1963B0074841 Pending DE1297883B (en) | 1963-12-28 | 1963-12-28 | Arrangement for determining the liquid level in rotating hollow bodies |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1297883B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE558690C (en) * | 1929-12-19 | 1932-09-10 | Siemens & Halske Akt Ges | Device for measuring or registering pressure changes with the aid of a capacitor |
| DE898565C (en) * | 1944-09-09 | 1954-01-11 | Union Rheinische Braunkohlen | Device for measuring and remote display of the liquid level in a container |
| DE1031013B (en) * | 1953-09-28 | 1958-05-29 | Honeywell Regulator Co | Measuring device |
| DE1051020B (en) * | 1959-02-19 | |||
| DE1058752B (en) * | 1956-06-19 | 1959-06-04 | Simmonds Aerocessories Ltd | Liquid flow meter |
-
1963
- 1963-12-28 DE DE1963B0074841 patent/DE1297883B/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1051020B (en) * | 1959-02-19 | |||
| DE558690C (en) * | 1929-12-19 | 1932-09-10 | Siemens & Halske Akt Ges | Device for measuring or registering pressure changes with the aid of a capacitor |
| DE898565C (en) * | 1944-09-09 | 1954-01-11 | Union Rheinische Braunkohlen | Device for measuring and remote display of the liquid level in a container |
| DE1031013B (en) * | 1953-09-28 | 1958-05-29 | Honeywell Regulator Co | Measuring device |
| DE1058752B (en) * | 1956-06-19 | 1959-06-04 | Simmonds Aerocessories Ltd | Liquid flow meter |
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