DK163609B - FLAT, INDUCTIVE LEVEL DETECTOR FOR LIQUID METALS - Google Patents

FLAT, INDUCTIVE LEVEL DETECTOR FOR LIQUID METALS Download PDF

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Publication number
DK163609B
DK163609B DK566786A DK566786A DK163609B DK 163609 B DK163609 B DK 163609B DK 566786 A DK566786 A DK 566786A DK 566786 A DK566786 A DK 566786A DK 163609 B DK163609 B DK 163609B
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DK
Denmark
Prior art keywords
level detector
coil
inductive
inductive level
coils
Prior art date
Application number
DK566786A
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Danish (da)
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DK566786D0 (en
DK163609C (en
DK566786A (en
Inventor
Joachim Barzantny
Klaus Thissen
Hans-Guenther Selbach
Theodor Lauhoff
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Interatom
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • 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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Description

- 1 -- 1 -

DK 163609 BDK 163609 B

Den foreliggende opfindelse angår en induktiv niveaudetektor ifølge indledningen til krav 1.The present invention relates to an inductive level detector according to the preamble of claim 1.

Sådanne induktive detektorer til flydende metal finder anvendelse i forskellige udformninger, fx. inden for støberiteknikken. Fra DE-pa-5 tentskrift 32 45 832 kendes en konstruktion til støbeforme, som har oven over hinanden anbragte induktionsspoler til måling af det afsluttende niveau i en støbeform.Such liquid metal inductive detectors are used in various designs, e.g. in the field of foundry engineering. DE Patent Specification 32 45 832 discloses a structure for molds having superposed induction coils for measuring the final level in a mold.

Hyppigt er det inden for støberiteknikken nødvendigt at måle tilnærmelsen af en overflade på flydende metal mod et beholderlåg eller en 10 anden flad komponent, som fx. kan vare en del af en støbemaskine· Ombygningen af bestående støbemaskiner med snævre pladsforhold er især med de hidtidige konstruktioner af niveaudetektorer ikke altid gennemførlig.Frequently, in the molding technique, it is necessary to measure the approximation of a liquid metal surface against a container lid or other flat component, such as e.g. can be part of a casting machine · The conversion of existing casting machines with narrow space conditions is not always feasible especially with the previous level detector designs.

Til grund for den foreliggende opfindelse ligger den opgave at 15 tilvejebringe en flad niveaudetektor, som er egnet til ombygning også ved snævre pladsforhold og eventuelt kan anvendes eller integreres i flade komponenter.The object of the present invention is to provide a flat level detector which is suitable for conversion even in narrow space conditions and which may be used or integrated into flat components.

Til løsning af denne opgave foreslås en induktiv niveaudetektor med de kendetegnende ejendommeligheder i krav 1. Foretrukne udformning-20 er er beskrevet i de afhængige krav. Den flade konstruktion af niveaudetektoren ifølge opfindelsen muliggør anvendelsen på steder, hvor hidtidige induktive målinger ikke var mulige. Især er der mulighed for at anbringe denne niveaudetektor i eller under flade komponenter, hvorhos, afhængig af arten af det der anvendte flydende metal, der kan vælges 25 egnede omhylninger. Det er naturligvis vigtigt, at spolerne på deres mod det flydende metal vendende side ikke afsksrmes af metallag, da måleprincippet ellers ikke fungerer.To solve this problem, an inductive level detector with the characteristic features of claim 1. is proposed. Preferred designs are described in the dependent claims. The flat construction of the level detector according to the invention enables the use in places where previous inductive measurements were not possible. In particular, it is possible to place this level detector in or below flat components, where, depending on the nature of the liquid metal used, suitable enclosures may be selected. Of course, it is important that the coils on their side facing the liquid metal are not separated by metal layers, as the measuring principle will not work otherwise.

Et udførelseseksempel for opfindelsen er vist på tegningen, og denne viser på: 30 fig. 1 en gengivelse nedefra under en blandeplade i en alumi- nium-støbemaskine, og fig. 2 et snit gennem denne plade langs linien II-II.An exemplary embodiment of the invention is shown in the drawing which shows in: FIG. 1 is a bottom view of a mixing plate in an aluminum casting machine; and FIG. 2 is a section through this plate along line II-II.

Fig. 1 viser en mellemplade 1 i en støbemaskine, som dækker en aluminiumsforrådsbeholder, en såkaldt tundish. På denne mellemplade kan 35 der sættes en støbeform, som fyldes med flydende metal gennem åbninger-FIG. 1 shows an intermediate plate 1 in a casting machine which covers an aluminum storage container, a so-called tundish. On this intermediate plate, a mold may be inserted which is filled with liquid metal through openings.

DK 163609 BDK 163609 B

- 2 - ne 2. Efter størkningen af det flydende metal i støbeformen og før af-løftningen af støbeformen fra mellempladen 1 skal niveauet af det flydende metal i forrådsbeholderen sænkes og holdes i en bestemt højde kort neden for dækpladen 1. Til nøjagtig overholdelse og måling af den-5 ne højde tjener niveaudetektoren ifølge opfindelsen, som er integreret i mellempladen 1. Til dette formål består mellempladen af ikke elektrisk ledende, aluminiumsbestandig (aluminiumbeståndigen) keramisk materiale, i hvilket to koncentriske spoler 5, 6 med deres tilledninger 7, 8 er integreret· Spolerne kan tilsluttes til en konstantvekselstrøm-10 kilde eller en måleelektronik via stikforbindelserne 9, 10 eller lignende. Fortrinsvis benyttes den indre spole 5 som sendespole, da denne på grund af sit mindre omfang ved samme vindingstai har en mindre ohmsk modstand, hvorved der kan frembringes en højere sendeeffekt. Afstanden d mellem spolerne 5, 6 ligger omtrent i størrelsesordenen for afstan-15 den, i hvilken det flydende aluminium skal holdes neden under mellempladen 1. På grund af den relativt store spredning af magnetfeltet fra spolerne kan der imidlertid også måles større og mindre afstande. Hele mellempladen 1 ligger, adskilt ved hjælp af en pakning 12, på kanten 11 af forrådsbeholderen· Med egnede midler 3, 4, fx. blindhuller, i hvilke 20 der griber stifter ind, fikseres mellempladen.- 2 - ne 2. After solidifying the liquid metal in the mold and before lifting the mold from the intermediate plate 1, the level of the liquid metal in the storage container must be lowered and kept at a certain height just below the cover plate 1. For accurate compliance and measurement of this height, the level detector of the invention serves as integrated into the intermediate plate 1. For this purpose, the intermediate plate consists of non-conductive aluminum-resistant (aluminum-resistant) ceramic material, in which two concentric coils 5, 6 with their conduits 7, 8 are integrated · The coils can be connected to a constant AC 10 source or a measurement electronics via the connector 9, 10 or the like. Preferably, the inner coil 5 is used as a transmitting coil, because of its smaller size at the same winding pitch, it has a less ohmic resistance, whereby a higher transmitting power can be produced. The distance d between the coils 5, 6 lies approximately on the order of the distance in which the liquid aluminum is to be held below the intermediate plate 1. However, due to the relatively large spread of the magnetic field from the coils, larger and smaller distances can also be measured. The entire intermediate plate 1 is separated, by means of a gasket 12, on the edge 11 of the storage container · With suitable means 3, 4, e.g. blind holes, in which 20 engaging pins, are fixed to the intermediate plate.

Ved anvendelsen af en metallisk mellemplade kan spolerne 5, 6 ikke integreres i det indre af pladen. I dette tilfælde er det imidlertid muligt at anbringe disse på undersiden af pladen i en passende udsparing og at støtte og fastgøre dem med keramisk masse. I det foreliggen-25 de udførelsesekseopel er spolerne anbragt omkring en eller flere åbninger 2 i mellempladen. Dette er ved de givne pladsforhold særligt fordelagtigt, da der ved denne anbringelse i området omkring spolerne 5, 6 endnu forbliver tilstrækkelig materialetykkelse til stabiliteten af mellempladen 1* Principielt er det imidlertid også muligt med andre 30 anbringelser mellem åbningerne 2 og under omslutning af to eller flere åbninger 2.When using a metallic intermediate plate, the coils 5, 6 cannot be integrated into the interior of the plate. In this case, however, it is possible to place these on the underside of the plate in a suitable recess and to support and secure them with ceramic mass. In the present embodiment, the coils are arranged around one or more openings 2 in the intermediate plate. This is particularly advantageous in the given space conditions, since with this placement in the area around the coils 5, 6 sufficient material thickness still remains for the stability of the intermediate plate 1 * In principle, however, it is also possible with other 30 arrangements between the openings 2 and under the circumference of two or multiple openings 2.

Den foreliggende induktive niveaudetektor egner sig især til måling og regulering af fyldningsgraden i en forrådsbeholder i forbindelse med en induktiv transportpumpe til flydende metal, som forsyner for-35 rådsbeholderen.The present inductive level detector is particularly suitable for measuring and controlling the degree of filling in a storage container in connection with an inductive liquid metal transport pump supplying the storage container.

Claims (7)

1. Induktiv niveaudetektor bestående af en med en konstant vekselstrøm magnetiserbar sendespole (5) og en modtagespole (6), der er koblet indbyrdes induktivt, hvorhos tilnærmelsen af en elektrisk ledende væske formindsker koblingen kontinuerligt, kendetegnet ved, 5 at sendespolen (5) og modtagespolen (6) er anbragt omtrent koncentrisk i et fælles plan·An inductive level detector comprising a constant-current magnetizable transmitting coil (5) and a receiving coil (6) inductively coupled, the approximation of an electrically conductive fluid continuously reducing the coupling, characterized in that the transmitting coil (5) and the receiving coil (6) is arranged approximately concentrically in a common plane · 2. Induktiv niveaudetektor ifølge krav 1, kendetegnet ved, at spolerne (5, 6) er udformet fladest muligt, fortrinsvis med spiralviklede ledere.The inductive level detector according to claim 1, characterized in that the coils (5, 6) are designed as flat as possible, preferably with coil wound conductors. 3. Induktiv niveaudetektor ifølge krav 1 eller 2, kendeteg net ved, at afstanden (d) mellem spolerne (5, 6) omtrent ligger i størrelsesordenen for den nøjagtigst målbare afstand fra den elektrisk ledende væske til spoleplanet.The inductive level detector of claim 1 or 2, characterized in that the distance (d) between the coils (5, 6) is approximately in the order of the most accurately measurable distance from the electrically conductive liquid to the coil plane. 4. Induktiv niveaudetektor ifølge krav 1, 2 eller 3, kende-15 tegnet ved, at den indre spole (5) er udformet som sendespole og den ydre spole (6) som modtagespole.An inductive level detector according to claim 1, 2 or 3, characterized in that the inner coil (5) is designed as a transmitting coil and the outer coil (6) as a receiving coil. 5. Induktiv niveaudetektor ifølge krav 1, 2, 3 eller 4, kendetegnet ved, at spolerne består af højtemperaturbestandige ledere.The inductive level detector according to claim 1, 2, 3 or 4, characterized in that the coils consist of high temperature resistant conductors. 6. Induktiv niveaudetektor ifølge ethvert af de foregående krav, 20 kendetegnet ved, at niveaudetektoren er integreret i en keramisk cfeekselplade, fordelerplade eller lignende i en smeltebeholder, en støbemaskine eller lignende.An inductive level detector according to any one of the preceding claims, characterized in that the level detector is integrated in a ceramic cooktop, distributor plate or the like in a melting container, a molding machine or the like. 7. Induktiv niveaudetektor ifølge ethvert af kravene 1-5, kendetegnet ved, at niveaudetektoren støbes keramisk og kan ind- 25 lægges i egnede flade udsparinger i komponenter til smelte- eller støbeapparater. 30The inductive level detector according to any one of claims 1-5, characterized in that the level detector is ceramic molded and can be inserted into suitable flat recesses in components for melting or molding appliances. 30
DK566786A 1985-11-27 1986-11-25 FLAT, INDUCTIVE LEVEL DETECTOR FOR LIQUID METALS DK163609C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541967 1985-11-27
DE19853541967 DE3541967A1 (en) 1985-11-27 1985-11-27 FLAT INDUCTIVE LEVEL SENSOR FOR LIQUID METALS

Publications (4)

Publication Number Publication Date
DK566786D0 DK566786D0 (en) 1986-11-25
DK566786A DK566786A (en) 1987-05-28
DK163609B true DK163609B (en) 1992-03-16
DK163609C DK163609C (en) 1992-08-24

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ID=6287006

Family Applications (1)

Application Number Title Priority Date Filing Date
DK566786A DK163609C (en) 1985-11-27 1986-11-25 FLAT, INDUCTIVE LEVEL DETECTOR FOR LIQUID METALS

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EP (1) EP0223901B1 (en)
DE (2) DE3541967A1 (en)
DK (1) DK163609C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642899A1 (en) * 1996-04-17 1997-10-23 Hewlett Packard Co Inductive ink level detection device for ink supplies
DE102018116952A1 (en) * 2018-07-12 2020-01-16 Rheinmetall Air Defence Ag Mold arrangement with a measuring section for detecting the flow behavior of metal during casting and a method for measuring a flow behavior of a melt in a mold arrangement

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1243891B (en) * 1964-04-06 1967-07-06 Euratom Device for the continuous measurement of the liquid level of electrically conductive liquids
SU494615A1 (en) * 1973-07-23 1975-12-05 Ордена Ленина И Ордена Трудового Красного Знамени Института Электросварки Им.Е.О.Патона Induction non-contact liquid metal level sensor
DE2722475A1 (en) * 1976-05-20 1977-12-08 Atomenergi Ab COIL ARRANGEMENT FOR ELECTROMAGNETIC MEASUREMENTS
CH609595A5 (en) * 1976-06-15 1979-03-15 Fischer Ag Georg Monitoring arrangement for the supply of a melt to a casting mould
LU80410A1 (en) * 1978-10-25 1980-05-07 Arbed METHOD FOR MEASURING THE LEVEL OF METALS IN CONTAINERS, ESPECIALLY IN CONTINUOUS CASTING CHILLERS
LU83969A1 (en) * 1982-02-23 1983-09-02 Arbed METHOD FOR MEASURING THE LEVEL OF LIQUID METALS IN CONTINUOUS CASTING PLANTS
SE451507B (en) * 1982-12-06 1987-10-12 Studsvik Energiteknik Ab PROCEDURE AND DEVICE FOR SURGERY OF THE REMAINING QUANTITY OF MELTED METAL ON THE BOTTOM OR DIFFERENTLY OF A CONTAINER IN CONNECTION WITH THE DISPOSAL OF MELTED METAL FROM THE CONTAINER
DE3245832C1 (en) 1982-12-10 1983-11-03 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach Method and device for monitoring the final level when filling molds with liquid metal

Also Published As

Publication number Publication date
EP0223901A1 (en) 1987-06-03
DE3541967A1 (en) 1987-06-04
EP0223901B1 (en) 1989-08-02
DK566786D0 (en) 1986-11-25
DK163609C (en) 1992-08-24
DE3664812D1 (en) 1989-09-07
DK566786A (en) 1987-05-28

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