DE3336037A1 - Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic - Google Patents

Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic

Info

Publication number
DE3336037A1
DE3336037A1 DE19833336037 DE3336037A DE3336037A1 DE 3336037 A1 DE3336037 A1 DE 3336037A1 DE 19833336037 DE19833336037 DE 19833336037 DE 3336037 A DE3336037 A DE 3336037A DE 3336037 A1 DE3336037 A1 DE 3336037A1
Authority
DE
Germany
Prior art keywords
measuring
vessel
overflow
valve
gas
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Withdrawn
Application number
DE19833336037
Other languages
German (de)
Inventor
Ivica Dipl.-Ing. 8000 München Grgic
Wolfgang Dipl.-Ing. 8034 Germering Söchtig
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei 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 Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to DE19833336037 priority Critical patent/DE3336037A1/en
Priority to DE8484104687T priority patent/DE3476266D1/en
Priority to EP19840104687 priority patent/EP0125541B1/en
Priority to US06/610,244 priority patent/US4565085A/en
Publication of DE3336037A1 publication Critical patent/DE3336037A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/44—Resins; rubber; leather
    • G01N33/442—Resins, plastics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences

Abstract

In an apparatus for measuring the gas content of a liquid plastic component in a plant for producing foam plastic, a liquid column composed of the liquid plastic component and having constant height is established at periodic time intervals in a measuring vessel. The hydrostatic pressure of the liquid column determined by means of a pressure sensor is evaluated as a measure of the density of the gas-containing plastic component. In order to be able to rinse the measuring vessel after every measuring operation and in order to be able to establish a constant height of the liquid column and to determine the gas content at atmospheric pressure, there is placed downstream of the measuring vessel, beyond an overflow, a closed overflow vessel provided with a controllable starting valve and with a control valve which is closed in a first switching position, connects the interior of the overflow vessel with a pressurised gas source in a second switching position and vents the interior of the overflow vessel in a third switching position.

Description

Die Erfindung bezieht sich auf eine VorrichtungThe invention relates to a device

und ein Verfahren zur Messung der Gasbeladung der flüssigen Kunststoffkomponenten einer Anlage zur Herstellung von Schaumkunststoff nach dem Hauptpatent .. .. ... (Patentanmeldung P 33 17 486).and a method for measuring the gas loading of the liquid plastic components a plant for the production of foam plastic according to the main patent .. .. ... (Patent application P 33 17 486).

Die das Hauptpatent betreffende Vorrichtung soll dahingehend verbessert werden, den gerätetechnischen Aufwand der Meßvorrichtung zu verringern.The device relating to the main patent is said to be improved in this regard be to reduce the equipment-technical expense of the measuring device.

Diese Aufgabe wird durch ein gemäß den Merkmalen des Anspruchs 1 ausgestaltetes Uberlaufgefäß gelöst.This object is configured according to the features of claim 1 Overflow vessel released.

Die Erfindung wird nachfolgend an einem Ausführungsbeispiel anhand der Zeichnung erläutert, die in schematischer Darstellung eine Vorrichtung zur Messung der Gasbeladung einer Polyurethan-Schäumanlage zeigt.The invention is based on an exemplary embodiment the drawing explains the schematic representation of an apparatus for measurement shows the gas loading of a polyurethane foaming system.

Ein Meßgefäß 10' ist über eine Zuführleitung 9' an einem Polyoltank (nicht dargestellt) angeschlossen. Die Komponentenzufuhr zum Meßgefäß 10' ist über ein Einlaßventil 8' steuerbar. Das Meßgefäß hat am Boden einen Druckmeßfühler 26' angeordnet und ist im oberen Bereich über einen Ueberlauf 11' mit einem Uberlaufgefäß 12' verbunden. Das Uberlaufgefäß 12' ist geschlossen und ist an eine Auslaßleitung 15' angeschlossen, in der sich ein steuerbares Auslaßventil 14' befindet. Im oberen Bereich des Uberlaufgefäßes 12' ist eine mit einem Schaltventil 16' versehene Druckgasleitung 17' angeschlossen. Das Schaltventil 161 besteht aus einem 2/2 Wegeventil und einem 3/2 Wegeventil Uber welche der Innenraum des Uberlaufgefäßes wahlweise absperrbar, mit einer Druckgasquelle 16 " oder mit der Atmosphäre verbindbar ist.A measuring vessel 10 'is connected to a polyol tank via a supply line 9' (not shown) connected. The component supply to the measuring vessel 10 'is over an inlet valve 8 'controllable. The measuring vessel has a pressure sensor 26 'at the bottom and is arranged in the upper area via an overflow 11 'with an overflow vessel 12 'connected. The overflow vessel 12 'is closed and is connected to an outlet line 15 'connected, in which there is a controllable outlet valve 14'. At the top The area of the overflow vessel 12 'is a pressurized gas line provided with a switching valve 16' 17 'connected. The switching valve 161 consists of a 2/2 way valve and a 3/2 way valve via which the interior of the overflow vessel can be selected can be shut off, can be connected to a compressed gas source 16 "or to the atmosphere.

Im Betrieb wird das Meßgefäß 10' zunächst gespült, wobei das Auslaßventil 14' und das Einlaßventil 8' geöffnet und das Schaltventil 16' geschlossen sind.During operation, the measuring vessel 10 'is first rinsed, with the outlet valve 14 'and the inlet valve 8' are open and the switching valve 16 'are closed.

Dabei strömt die flüssige Kunststoffkomponente aus einem Tank (nicht dargestellt) huber die Zuführleitung 9' durch das Meßgefäß 10' über den Uberlauf 11' in das Uberlaufgefäß 12' und von dort über die Rückführleitung 15' in den Tank zuruck.The liquid plastic component flows out of a tank (not shown) over the supply line 9 'through the measuring vessel 10' over the overflow 11 'into the overflow vessel 12' and from there via the return line 15 'into the tank return.

Nach dem Spülen des Meßgefäßes 10' wird die flüssige Kunststoffkomponente aus dem Uberlaufgefäß 12' ausgetrieben, wozu das Einlaßventil 8' geschlossen und das Auslaßventil 14' geöffnet werden und der Innenraum des Uberlaufgefäßes 12 über das Schaltventil 1b1 mit der Druckgasquelle 16" verbunden wird. Die im Uberlaufgefäß 12' enthaltene Komponente wird in den Tank zurtickgeftihrt.After rinsing the measuring vessel 10 ', the liquid plastic component driven out of the overflow vessel 12 ', including the inlet valve 8' closed and the outlet valve 14 'are opened and the interior of the overflow vessel 12 over the switching valve 1b1 is connected to the compressed gas source 16 ″. The in the overflow vessel The component contained in 12 'is fed back into the tank.

FUr den anschließenden Meßvorgang werden das Einlaßventil 8 und das Auslaßventil 14' geschlossen und der Innenraum des Überlaufgefäßes über das Schaltventil 16' entlüftet. Nach.einer Entspannungsphase wird mittels des Druckmeßfühlers 26' der hydrostatische Druck der im Meßgefäß 10' enthaltenen Flüssigkeitssäule gemessen und als Maß für die Dichte bzw. den Gasbeladungsgrad der gasbeladenen Kunststoffkomponente ausgewertet. Die Messung ergibt den Gasbeladungsgrad der Komponente bei Atmosphärendruck.For the subsequent measuring process, the inlet valve 8 and the Outlet valve 14 'closed and the interior of the overflow vessel via the switching valve 16 'vented. After a relaxation phase, the pressure sensor 26 ' the hydrostatic pressure of the liquid column contained in the measuring vessel 10 'is measured and as a measure of the density or the degree of gas loading of the gas-laden plastic component evaluated. The measurement gives the gas loading level of the component at atmospheric pressure.

Claims (2)

Vorrichtung und Verfahren zur Messung der Gasbeladung der flüssigen Kunststoffkomponenten einer Anlage zur Herstellung von Schaumkunststoff Patentansprüche 1. Vorrichtung zur Messung der Gasbeladung der flüssigen Kunststoffkomponenten einer Anlage zur Herstellung von Schaumkunstoff, mit einem, eine Flüssigkeitssäule aus gasbeladener Kunststoffkomponente einschließenden Meßgefäß, einer den hydrostatischen Druck p der Flüssigkeitssäule als Maß der Dichte der gasbeladenen Kunststoffkomponente wertenden Dichtemeßeinrichtung, einem im Meßgefäß angeordneten und eine bestimmte Höhe h der Flüssigkeitssäule einstellenden Uberlauf und einem dem Uberlauf nachgeordneten Uberlaufgefäß nach Hauptpatent .. .. ... (Patentanmeldung P 33 17 486), d a -d u r c h g e k e n n z e i c h n e t , daß das Uberlaufgefäß (12') geschlossen ist, im unteren Bereich ein steuerbares Auslaßventil (14') und im oberen Bereich ein steuerbares Schaltventil (16') aufweist, in dessen erster Schaltstellung das Schaltventil (16') geschlossen ist, in dessen zweiter Schaltstellung der Innenraum des Uberlaufgefäßes (12') mit einer Druckgasquelle (16 " ) verbindbar ist und in dessen dritter Schaltstellung der Innenraum des Uberlaufgefäßes (12') entlUftbar ist. Device and method for measuring the gas loading of the liquid Plastic components of a plant for the production of foam plastic claims 1. Device for measuring the gas loading of the liquid plastic components of a Plant for the production of foam plastic, with a, a liquid column from gas-laden plastic component enclosing measuring vessel, one of the hydrostatic Pressure p of the liquid column as a measure of the density of the gas-laden plastic component evaluating density measuring device, one arranged in the measuring vessel and one specific Height h of the liquid column adjusting overflow and a downstream of the overflow Overflow vessel according to the main patent .. .. ... (patent application P 33 17 486), d a -d u notify that the overflow vessel (12 ') is closed, a controllable outlet valve (14 ') in the lower area and a controllable outlet valve (14') in the upper area controllable switching valve (16 '), in the first switching position of which the switching valve (16 ') is closed, in its second switching position the interior of the overflow vessel (12 ') can be connected to a compressed gas source (16 ") and in its third switch position the interior of the overflow vessel (12 ') can be vented. 2. Verfahren zum Betrieb der Vorrichtung nach Anspruch 1, d a du r c h g e k e n n z e i c h n e t daß zum Spülen des Meßgefäßes (10') das Anlaßventil (14') und das Einlaßventil (8') geöffnet und das Schaltventil (16') geschlossen sind, zum Austreiben der Komponente aus dem Uberlaufgefäß (12') das Einlaßventil (8') geschlossen, das Auslaßventil (14') geöffnet und das Schaltventil (16') den-Innenraum des Uberlaufgefäßes (12') mit der Druckgasquelle (16'') verbindet und zum Messen der Gasbeladung der im Meßgefäß (10') enthaltenen Flüssigkeitssäule aus gasbeladener Komponente das Einlaßventil (8') und das Auslaßventil (14') geschlossen sind und das Schaltventil (16') den Innenraum des Überlaufgefäßes (12') mit der Atmosphäre verbindet.2. A method of operating the device according to claim 1, d a du r c h g e k e n n n n e i c h n e t that the starter valve is used to rinse the measuring vessel (10 ') (14 ') and the inlet valve (8') open and the switching valve (16 ') closed are, to expel the component from the overflow vessel (12 ') the inlet valve (8 ') closed, the outlet valve (14') opened and the switching valve (16 ') the interior of the overflow vessel (12 ') with the compressed gas source (16' ') and for measuring the gas loading of the liquid column of gas-laden liquid contained in the measuring vessel (10 ') Component the inlet valve (8 ') and the outlet valve (14') are closed and the switching valve (16 ') the interior of the overflow vessel (12') with the atmosphere connects.
DE19833336037 1983-05-13 1983-10-04 Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic Withdrawn DE3336037A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19833336037 DE3336037A1 (en) 1983-10-04 1983-10-04 Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic
DE8484104687T DE3476266D1 (en) 1983-05-13 1984-04-26 Method and apparatus for measuring the gas content of a liquid synthetic component
EP19840104687 EP0125541B1 (en) 1983-05-13 1984-04-26 Method and apparatus for measuring the gas content of a liquid synthetic component
US06/610,244 US4565085A (en) 1983-05-13 1984-05-14 Method of and apparatus for measuring the degree of gas charge in a liquid synthetic resin component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833336037 DE3336037A1 (en) 1983-10-04 1983-10-04 Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic

Publications (1)

Publication Number Publication Date
DE3336037A1 true DE3336037A1 (en) 1985-04-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833336037 Withdrawn DE3336037A1 (en) 1983-05-13 1983-10-04 Apparatus and method for measuring the gas content of the liquid plastic components of a plant for producing foam plastic

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DE (1) DE3336037A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119966A1 (en) * 1991-06-18 1993-01-07 Spuehl Ag MEASURING DEVICE FOR DETECTING THE GAS LOAD OF A PLASTIC COMPONENT
DE4224616A1 (en) * 1992-07-25 1994-01-27 Spuehl Ag St Gallen Measuring device for detecting the gas load or the vapor pressure of a liquid, in particular a flowable plastic component
US6393893B1 (en) 1997-07-11 2002-05-28 Edf Polymer Applikation Maschinenfabrik Gmbh Measuring device and method for measuring gas load in liquids, especially in liquid plastic materials
DE10123530A1 (en) * 2001-05-15 2002-11-21 Voith Paper Patent Gmbh Method for determining the gas content of a fluid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723618A1 (en) * 1977-05-25 1978-11-30 Wolfgang Dockhorn METHOD AND DEVICE FOR DETERMINING THE DENSITY OF A WEIGHTED FLUSHING LIQUID IN A DEEP HOLE, IN PARTICULAR AN OIL HOLE
DE2724132B2 (en) * 1977-05-27 1980-01-24 Bayer Ag, 5090 Leverkusen Method and apparatus for producing a foam-forming reaction mixture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723618A1 (en) * 1977-05-25 1978-11-30 Wolfgang Dockhorn METHOD AND DEVICE FOR DETERMINING THE DENSITY OF A WEIGHTED FLUSHING LIQUID IN A DEEP HOLE, IN PARTICULAR AN OIL HOLE
DE2724132B2 (en) * 1977-05-27 1980-01-24 Bayer Ag, 5090 Leverkusen Method and apparatus for producing a foam-forming reaction mixture

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119966A1 (en) * 1991-06-18 1993-01-07 Spuehl Ag MEASURING DEVICE FOR DETECTING THE GAS LOAD OF A PLASTIC COMPONENT
US5285674A (en) * 1991-06-18 1994-02-15 Spuhl Ag Measurement device for detecting gas charge of a plastic component
DE4224616A1 (en) * 1992-07-25 1994-01-27 Spuehl Ag St Gallen Measuring device for detecting the gas load or the vapor pressure of a liquid, in particular a flowable plastic component
US6393893B1 (en) 1997-07-11 2002-05-28 Edf Polymer Applikation Maschinenfabrik Gmbh Measuring device and method for measuring gas load in liquids, especially in liquid plastic materials
DE10123530A1 (en) * 2001-05-15 2002-11-21 Voith Paper Patent Gmbh Method for determining the gas content of a fluid

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