DE3011803A1 - LIQUID MONITORING PROBE - Google Patents
LIQUID MONITORING PROBEInfo
- Publication number
- DE3011803A1 DE3011803A1 DE19803011803 DE3011803A DE3011803A1 DE 3011803 A1 DE3011803 A1 DE 3011803A1 DE 19803011803 DE19803011803 DE 19803011803 DE 3011803 A DE3011803 A DE 3011803A DE 3011803 A1 DE3011803 A1 DE 3011803A1
- Authority
- DE
- Germany
- Prior art keywords
- electrode
- rings
- bedding
- probe
- tube
- 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.)
- Withdrawn
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
- G01F23/24—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 resistance of resistors due to contact with conductor fluid
- G01F23/241—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 resistance of resistors due to contact with conductor fluid for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Leads Or Probes (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
.-ι. . ·-■ -ν r. ■ . , f.— - .t- -y £- ι . .-,
v J .ι w *- w Γ # ι. - - * L/ I w ft-Jl .-ι. . · - ■ -ν r. ■. , f.— - .t- -y £ - ι. .-,
v J .ι w * - w Γ # ι. - - * L / I w ft-Jl
Beschreibungdescription
Die Erfindung betrifft eine Sonde zur überwachung von Flüssigkeiten, wie sie im Oberbegriff des Anspruches 1 spezifiziert ist.The invention relates to a probe for monitoring Liquids as specified in the preamble of claim 1.
Ein wesentlicher Vorteil derartiger Sontien (US-PS 33 39 411) besteht darin, als Isoliermantel für die Elektrode handelsübliches Schlauchmaterial verwenden zu können; denn hierdurch lassen sich besonders preiswert Isoliermäntel in jeder benötigten Länge realisieren.A major advantage of such sontia (US-PS 33 39 411) consists of a commercially available insulating jacket for the electrode To be able to use tubing material; because this allows particularly inexpensive insulating jackets in any required Realize length.
Es hat sich allerdings gezeigt, daß die Isolierschläuche, -jQ insbesondere wenn sie aus plastisch nachgiebigem Werkstoff, z. B. PTFE, bestehen, in der Einklemmzone zwischen den Dichtscnultern bei häufigen Temperaturwechseln rissig werden. Weder eine einwandfreie Isolierung der Elektrode gegenüber dem Sondengehäuse noch eine zuverlässige Abdichtung zwischen beiden ist dann gewährleistet. It has been shown, however, that the insulating hoses, -jQ especially if they are made of plastically flexible material such. B. PTFE, exist, in the pinch zone between the sealing shoulders become cracked with frequent temperature changes. Neither a perfect insulation of the electrode from the probe housing nor a reliable seal between the two is then guaranteed.
Die Aufgabe der vorliegenden Erfindung ist es, eine Sonde der eingangs genannten Art zu schaffen, bei der auch unter Temperaturwechseln die erforderliche elektrische Isolierung sowie Abdichtung zwischen der Elektrode und dem Sondengehäuse stets ge-2D geben ist.The object of the present invention is to create a probe of the type mentioned at the outset, in which also under temperature changes the required electrical insulation and sealing between the electrode and the probe housing are always ge-2D give is.
Erreicht wird dies durch die im Anspruch 1 angegebenen Erfindungsmerkmale.This is achieved by what is specified in claim 1 Features of the invention.
Durch die Einbettung des Isulationsschlauches zwischen den nachgiebigen Bettungaringen in der Einklemmzone können durch Temperaturwechsel verursachte Wärmedehnungen und -kontraktiünen des Isolationsschlauches ausreichend ungehindert erfolgen, so daß es zu keinen plastischen Überbeanspruchungen desselben kommt. Infolgedessen ist die Dichtigkeit des Isolationsschlauches durch TemperaturwBchsel nicht mehr gefährdet.By embedding the insulation tube between the resilient Hungarian bed rings in the trapping zone Changes in temperature caused thermal expansion and contraction the insulation tube take place sufficiently unhindered so that there is no plastic overstressing of the same. Consequently the tightness of the insulation tube is no longer endangered by temperature changes.
•jg Die Unteransprüche geben vorteilhafte Weiterbildungen der Erfindung an.• jg The subclaims give advantageous developments of the invention.
13 0 0 4 Π / Ό (Q 8 a13 0 0 4 Π / Ό (Q 8 a
F. 3:Μ,ϊ£ r.3 -F. 3: Μ, ϊ £ r.3 -
Mit den Merkmalen des Anspruches 2 werden relative Dehnungsbeuiegungen zwischen dem IsnlationsschlBuch und den Bettungsringen an den gemeinsamen Berührungsflächen vermieden. DarauB resultieren geringe Materialspannungen in dem diesbezüglich empfindliehen IsolatiDnsschlauch.With the features of claim 2, relative expansion deflections between the isolation key and the bedding rings avoided at the common contact surfaces. Result from this low material tension in the sensitive insulating tube.
In der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Sonde dargestellt.In the drawing is an embodiment of the invention Probe shown.
Ein Sondengehäuse 1 besitzt eine Aufnahmebohrung 2 mit einem Abschnitt größeren und einem Abschnitt kleineren Durchmesaera. Den Durchmesserunterschied zwischen diesen beiden Abachnitten überbrückt eine axiale, konisch gestaltete Dichtschulter 3. In der AufnahmebDhrung 2 ist eine stabförmige Elektrode U gelagert, die komplementär zur Aufnahmebohrung 2 gleichfalls einen Abschnitt größeren sowie einen kleineren Durchmesser und dazwischen eine axiale, kegelige Dichtschulter 5 aufweist. Ein nachgiebiger Isolationsschlauch 6 auf PTFE-üüerk stoff ummantelt die Elektrode *♦ zumindest auf einem Teil ihrer Länge. Mittels einer Feder 7 sowie über eine Spannmutter 8 und einen elektrisch isolierenden Druckring 9 wird der IsolatiDnsschlauch 6 im Bereich der beiden Dichtschultern 3,5 abdichtend eingeklemmt.A probe housing 1 has a receiving bore 2 with a section of larger and a section of smaller diameter. The difference in diameter between these two sections is bridged by an axial, conical sealing shoulder 3. A rod-shaped electrode U is mounted in the receiving bore 2, which, complementary to the receiving bore 2, also has a section with a larger and a smaller diameter and an axial, conical sealing shoulder 5 in between. A flexible insulating tube 6 made of PTFE-üüerk material encases the electrode * ♦ at least over part of its length. The insulating hose 6 is clamped in a sealing manner in the area of the two sealing shoulders 3, 5 by means of a spring 7 and a clamping nut 8 and an electrically insulating pressure ring 9.
Zwischen der Dichtschulter 3 und dem Isolationsschlauch 6 sowie auch zwischen letzterem und der Dichtschulter 5 iBt jeweils ein nachgiebiger Bettungsring 10, 11 aus PTFE angeordnet. Die druckdichte Abdichtung zwischen dem Sondengehäuse 1 und der Elektrode U erfolgt mithin über die beiden Bettungsringe 10, 11 und den Isolationsschlauch 6.A flexible bedding ring 10, 11 made of PTFE is arranged between the sealing shoulder 3 and the insulating tube 6 and also between the latter and the sealing shoulder 5. The pressure-tight seal between the probe housing 1 and the electrode U therefore takes place via the two bedding rings 10, 11 and the insulating tube 6.
Die Bettungsringe 10, 11 können ohne Schwierigkeiten beliebig dick bemessen werden. Der Isolationsschlauch ist hingegen relativ dünnwandig, unter anderem, um ihn an seinem einen Ende problemlos auf den Durchmesser des dünneren Elektrodenabschnittes einziehen zu können.The bedding rings 10, 11 can be made as thick as desired without difficulty. The insulation tube, however, is relatively thin-walled, among other things, in order to easily adjust it at one end to the diameter of the thinner electrode section to be able to move in.
Durch die nachgiebigen Bettungsringe 10, 11 ist die Voraussetzung für eine ausreichend ungehinderte Dehnung und Hon-The flexible bedding rings 10, 11 are the prerequisite for a sufficiently unhindered expansion and honing
13 0 0 413 0 0 4
traktion des IsDlationsschlauchES 6 in dar allein kritischen Einklemmzone bei Temperaturwechseln gegeben. Die bestehenden Unterschiede in der Wärmedehnung des IsolationsBchlauches 6 und des Sondengehäuses 1 bzuj. der Elektrode U werden durch die entsprechend dimensionierten Bettungsringe 1D1 11 kompensiert. Innerhalb des dünnwandigen IsolBtiansschlauches 6 treten daher keine hohen Spannnungen auf, die zu Materialrissen führen könnten, so daß eine einwandfreie Abdichtung und elektrische Isolierung zwischen dem Sondengehäuse 1 und der Elektrode b stets gewährleistet ist.traction of the isolation hose 6 is given in the only critical trapping zone in the event of temperature changes. The existing differences in the thermal expansion of the insulation tube 6 and the probe housing 1 bzuj. the electrode U are compensated by the appropriately dimensioned Bettungsringe 1D 1. 11 Therefore, within the thin-walled insulating hose 6, no high stresses occur which could lead to material cracks, so that perfect sealing and electrical insulation between the probe housing 1 and the electrode b is always guaranteed.
130041/130041 /
Liste οΈγ BezugszeichenList οΈγ reference symbols
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130 041 /©088130 041 / © 088
Leer seiteBlank page
Claims (3)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803011803 DE3011803A1 (en) | 1980-03-27 | 1980-03-27 | LIQUID MONITORING PROBE |
| NL8100622A NL8100622A (en) | 1980-03-27 | 1981-02-10 | PROBE. |
| FR8102652A FR2479457A1 (en) | 1980-03-27 | 1981-02-11 | PROBE FOR THE CONTROL OF LIQUIDS |
| GB8104997A GB2072769A (en) | 1980-03-27 | 1981-02-17 | Probe for monitoring liquids |
| SE8101836A SE8101836L (en) | 1980-03-27 | 1981-03-23 | PROBLEM FOR MONITORING OF WETS |
| IT8148101A IT8148101A0 (en) | 1980-03-27 | 1981-03-25 | PROBE FOR THE SURVEILLANCE OF LIQUIDS |
| JP4422381A JPS56151319A (en) | 1980-03-27 | 1981-03-27 | Probe for monitoring liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803011803 DE3011803A1 (en) | 1980-03-27 | 1980-03-27 | LIQUID MONITORING PROBE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3011803A1 true DE3011803A1 (en) | 1981-10-08 |
Family
ID=6098475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803011803 Withdrawn DE3011803A1 (en) | 1980-03-27 | 1980-03-27 | LIQUID MONITORING PROBE |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS56151319A (en) |
| DE (1) | DE3011803A1 (en) |
| FR (1) | FR2479457A1 (en) |
| GB (1) | GB2072769A (en) |
| IT (1) | IT8148101A0 (en) |
| NL (1) | NL8100622A (en) |
| SE (1) | SE8101836L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005025576A1 (en) * | 2005-06-03 | 2006-12-07 | Gestra Ag | Capacitive level probe |
| DE102019102812A1 (en) * | 2019-02-05 | 2020-08-06 | Sick Ag | Sensor for determining a process variable |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121125B (en) * | 1982-05-28 | 1985-11-13 | Smiths Industries Plc | Sealing arrangements |
| EP0115106A1 (en) * | 1983-01-25 | 1984-08-08 | George W. Vosper | Boiler low water cut-off |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534352A (en) * | 1967-06-23 | 1970-10-13 | Stewart Warner Corp | Coolant sensing apparatus |
| DE2048702A1 (en) * | 1970-07-11 | 1972-01-20 | Panerai G | Remote level indicator - for submarine's trim tank |
-
1980
- 1980-03-27 DE DE19803011803 patent/DE3011803A1/en not_active Withdrawn
-
1981
- 1981-02-10 NL NL8100622A patent/NL8100622A/en not_active Application Discontinuation
- 1981-02-11 FR FR8102652A patent/FR2479457A1/en not_active Withdrawn
- 1981-02-17 GB GB8104997A patent/GB2072769A/en not_active Withdrawn
- 1981-03-23 SE SE8101836A patent/SE8101836L/en not_active Application Discontinuation
- 1981-03-25 IT IT8148101A patent/IT8148101A0/en unknown
- 1981-03-27 JP JP4422381A patent/JPS56151319A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005025576A1 (en) * | 2005-06-03 | 2006-12-07 | Gestra Ag | Capacitive level probe |
| DE102019102812A1 (en) * | 2019-02-05 | 2020-08-06 | Sick Ag | Sensor for determining a process variable |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2479457A1 (en) | 1981-10-02 |
| GB2072769A (en) | 1981-10-07 |
| NL8100622A (en) | 1981-10-16 |
| IT8148101A0 (en) | 1981-03-25 |
| SE8101836L (en) | 1981-09-28 |
| JPS56151319A (en) | 1981-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8127 | New person/name/address of the applicant |
Owner name: GESTRA AG, 2800 BREMEN, DE |
|
| 8130 | Withdrawal |