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DE2808469A1 - PRESSURE TRANSDUCER FOR HOT MEDIA - Google Patents

PRESSURE TRANSDUCER FOR HOT MEDIA

Info

Publication number
DE2808469A1
DE2808469A1 DE19782808469 DE2808469A DE2808469A1 DE 2808469 A1 DE2808469 A1 DE 2808469A1 DE 19782808469 DE19782808469 DE 19782808469 DE 2808469 A DE2808469 A DE 2808469A DE 2808469 A1 DE2808469 A1 DE 2808469A1
Authority
DE
Germany
Prior art keywords
hot media
plate
temperature
pressure transducers
media according
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.)
Ceased
Application number
DE19782808469
Other languages
German (de)
Inventor
Erich Brosa
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19782808469 priority Critical patent/DE2808469A1/en
Publication of DE2808469A1 publication Critical patent/DE2808469A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0681—Protection against excessive heat
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/0046—Fluidic connecting means using isolation membranes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
    • G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
    • G01L9/045—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges with electric temperature compensating means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The pressure probe comprises a cylindrical housing containing an upper diaphragm made in one piece from a thick plate (2) whose smooth surface supports strain-gauge strips (4) operating as the electro-mechanical transducer. The underside of the plate has a space which is filled with mercury and into which is fixed a sealing cone (11) supporting capillary tubes (9, 10). One tube, used for filling (10), is bent through 180 deg. and passes upwards through a slot in the plate. It is sealed with a short length of wire and punched off. The second tube (9) extends downwards through the cylindrical body to the tip (21) of the probe. Temp. compensation for the mercury column is provided by thermo-elements connected into the strain-gauge bridge.

Description

Druckaufnehmer für heiße MedienPressure transducers for hot media

Vorliegende erfindung betrifft einen truckanfnehnier, der als truckübertragungsmedium von der Meßstelle zum elektronischen Wandlerteil eine Blüssigkeit, vorzugsweise Quecksilber, besitzt und beispielsweise zur truckmiessung in rtrudern verwende-t wird.The present invention relates to a truck transmission which is used as a truck transmission medium a fluid from the measuring point to the electronic converter part, preferably Mercury, and is used, for example, to measure trucks in oars will.

Zweck der Erfindung ist einfache fferstellbarkeit und Montage, sowie schneller Ab gleich des Temperaturfehlers von Druckaufnehmern für heiße Medien.The purpose of the invention is easy fferstellbarkeit and assembly, as well faster comparison of the temperature error of pressure transducers for hot media.

Anhand der ein vereinfachtes Ausführungsbeispiel darstellenden Abb. 1 bis Abb. 4 soll die erfindung im Polgenden näher beschrieben werden.With the aid of Fig. 1 to Fig. 4, the invention will be described in more detail in the pole end.

Die obere Membran 1 (Abb. 1 und 2) ist in einem Stück aus einer dicken Plat-te 2 gefertigt und trägt auf der glatten Oberfläche 3 die als mechanisch elektrische Wandler bekannten Dehnungsmeßstreifen 4, kurz DBISo Um den mit Quecksilber gefüllten Hohlraum 5 sicher mit kleinster Toleranz herzustellen, ist sowohl die Tiefe 6 der konischen Bohrung 7, als auch die Länge 8, des zwei Kapillarrohre 9 und io tragenden Dichtkonus 11 mit Anschlagflächen 12 ausgeführt. Gegen Austreiben des Konus 11 bei hohem Druck, sichert die Einbördelung 13 auf der Außenseite des Konus 11 (Abb. 2).The upper membrane 1 (Fig. 1 and 2) is made in one piece from a thick Plate 2 manufactured and carries on the smooth surface 3 as a mechanical electrical Well-known transducer strain gauges 4, DBISo for short To the filled with mercury To produce cavity 5 safely with the smallest tolerance, both the depth 6 is the conical bore 7, as well as the length 8, of the two capillary tubes 9 and io supporting Sealing cone 11 designed with stop surfaces 12. Against expulsion of the cone 11 at high pressure, secures the bead 13 on the outside of the cone 11 (Fig. 2).

Die Kapillarrohre 9 und lo sind in den Dichtkonus 11 stirnseitig 26 eingeschweißt. Die Püllkapillare 10, die über den Gehäuserand 14 um 1800 in den Schlitz 25 nach oben gebogen ist, wird nach dem Füllen mit Quecksilber durch ein kurzes Drahtstück 15, Abb. 3 verschlossen und mittels eines doppelseitigen Presswerkzeuges 16-17 gegen einige tausend bar Innendruck, vierkantig zugequetscht (Abb. 3).The capillary tubes 9 and lo are in the sealing cone 11 on the end face 26 shrink wrapped. The Püllkapillary 10, which over the edge of the housing 14 to 1800 in the Slot 25 is bent upwards after filling with mercury through one short piece of wire 15, Fig. 3, and closed by means of a double-sided pressing tool 16-17 against a few thousand bar internal pressure, squeezed square (Fig. 3).

Die Temperaturkompensation des sich stark dehnenden Quecksilbers erfolgt durch zwei aktive Thermoelemente 19 und 20, die direkt und symmetrisch in der Messbrückenschaltung Abb0 4 liegen.The temperature compensation of the rapidly expanding mercury takes place by two active thermocouples 19 and 20, which are directly and symmetrically in the measuring bridge circuit Fig0 4 lie.

Thermoelement 19 fühlt die Temperatur im Schaft 21 bei der heißesten Stelle des Aufnehmers, Thermoelement 20 fühlt die Temperatur im Gehäuse 22 bei der oberen Membran 1 mit den DMS 4. Zur Feinkorrektur sind die Abgleichwiderstände 23 und 24 vorhanden. R 1 - R 4 sind die Widerstände der Messbrückenschaltung.Thermocouple 19 senses the temperature in shaft 21 at the hottest Position of the transducer, thermocouple 20 senses the temperature in housing 22 at upper membrane 1 with the strain gauges 4. The balancing resistors 23 and 24 available. R 1 - R 4 are the resistances of the measuring bridge circuit.

L e e r s e i t eL e r s e i t e

Claims (4)

Patentansrüche 1 Druckaufnehmer für heiße Medien d a d u r c h g e k e n n z e i c h n e t, daß die, die mechanisch-elektrischen Wandlerelemente tragende Membran aus einem Stück einer biegesteifen Pla-tte besteht, die eine konische Bohrung mit einer Tiefenbegrenzung für einen ebenfalls mit Tiefenbegrenzung einpressbaren Konusteil, mit zwei eingeschweißten Kapillarrohren besitzt und diese einzubördeln ermöglicht.Claims 1 Pressure transducers for hot media d a d u r c h g e it is not indicated that those carrying the mechanical-electrical converter elements Diaphragm consists of a piece of rigid plate with a conical bore with a depth limiter for one that can also be pressed in with a depth limiter Conical part with two welded-in capillary tubes and crimped them enables. 2 Druckaufnehmer für heiße Medien nach Anspruch 1, dadurch gekennzeichnet, daß die Füllkapillare um 1800 nach oben, durch einen Schlitz in der Platte geführt, nach der Quecksilberfüllung mittels passenden Drahtstückes verschloßen und durch Presswerkzeuge vorzugsweise vierkantig dicht gequetscht wird.2 pressure transducers for hot media according to claim 1, characterized in that that the filling capillary upwards by 1800, passed through a slot in the plate, after the mercury filling closed with a suitable piece of wire and through Pressing tools is preferably squeezed tightly square. 3 iRruckauSnehmer für heiße Medien nach Anspruch 1-2, dadurch gekennzeiclBlet, daß die Kapillaren auf den Austrittsseiten ihres Aufnahmeteiles stirnseitig dichtgeschweißt sind.3 pressure transducers for hot media according to claims 1-2, characterized in that that the capillaries are welded tightly at the end on the exit sides of their receiving part are. 4 Iruckaufnehmer für heiße Medien nach Anspruch 1-3, dadurch gekennzeichnet, daß je ein aktives Thermoelement die Temperatur des heißen Schaftteiles und die Temperatur des die Brückenschaltung enthaltenden Gehäuses fühlen und so in die Brückenschaltung eingesetzt sind, daß mittels der die Thermoelemente überbrückenden Abgleichwiderstände der Temperaturfehler des Aufnehmers korrigiert wird.4 pressure sensors for hot media according to claims 1-3, characterized in that that each an active thermocouple the temperature of the hot shaft part and the Feel the temperature of the housing containing the bridge circuit and so into the bridge circuit are used that by means of the balancing resistors bridging the thermocouples the temperature error of the transducer is corrected.
DE19782808469 1978-02-28 1978-02-28 PRESSURE TRANSDUCER FOR HOT MEDIA Ceased DE2808469A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782808469 DE2808469A1 (en) 1978-02-28 1978-02-28 PRESSURE TRANSDUCER FOR HOT MEDIA

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782808469 DE2808469A1 (en) 1978-02-28 1978-02-28 PRESSURE TRANSDUCER FOR HOT MEDIA

Publications (1)

Publication Number Publication Date
DE2808469A1 true DE2808469A1 (en) 1979-09-06

Family

ID=6033108

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782808469 Ceased DE2808469A1 (en) 1978-02-28 1978-02-28 PRESSURE TRANSDUCER FOR HOT MEDIA

Country Status (1)

Country Link
DE (1) DE2808469A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496261A1 (en) * 1980-12-12 1982-06-18 Commissariat Energie Atomique Pressure gauge with very rapid response - contg. strain gauges and usable at high temps. and pressures, esp. in nuclear power industry
EP0239933A3 (en) * 1986-04-04 1989-07-19 Dynisco, Inc. Pressure transducer pressure transducer
DE10319417A1 (en) * 2003-04-29 2004-11-18 Endress + Hauser Gmbh + Co. Kg Pressure sensor with temperature compensation
EP1805494A1 (en) * 2004-10-29 2007-07-11 Endress + Hauser GmbH + Co. KG Pressure gauge with hydraulic pressure transmission
WO2016048424A3 (en) * 2014-09-23 2016-08-11 Rosemount Inc. Cooling for industrial process variable transmitters
US9752947B2 (en) 2014-09-23 2017-09-05 P I Components Corp. Thermoelectric heating, cooling and power generation for direct mount and dual compartment fill remote seal systems
US9772246B2 (en) 2014-09-30 2017-09-26 Rosemount Inc. Fill fluid thermal management

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072150A (en) * 1959-11-03 1963-01-08 American Radiator & Standard Pressure-responsive device
DE1948191B1 (en) * 1969-09-24 1971-01-14 Siemens Ag Pressure transmitter for measuring media of high temperature
DE2210504B2 (en) * 1972-03-04 1976-12-30 Kessler, Karl H., Ing.(grad.), 7300 Esslingen Mechanical link for transducer outside hot zone - with thermal expansion of link compensated electrically

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072150A (en) * 1959-11-03 1963-01-08 American Radiator & Standard Pressure-responsive device
DE1948191B1 (en) * 1969-09-24 1971-01-14 Siemens Ag Pressure transmitter for measuring media of high temperature
DE2210504B2 (en) * 1972-03-04 1976-12-30 Kessler, Karl H., Ing.(grad.), 7300 Esslingen Mechanical link for transducer outside hot zone - with thermal expansion of link compensated electrically

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496261A1 (en) * 1980-12-12 1982-06-18 Commissariat Energie Atomique Pressure gauge with very rapid response - contg. strain gauges and usable at high temps. and pressures, esp. in nuclear power industry
EP0239933A3 (en) * 1986-04-04 1989-07-19 Dynisco, Inc. Pressure transducer pressure transducer
DE10319417A1 (en) * 2003-04-29 2004-11-18 Endress + Hauser Gmbh + Co. Kg Pressure sensor with temperature compensation
US7441461B2 (en) 2003-04-29 2008-10-28 Endress + Hauser Gmbh + Co. Kg Pressure pickup with temperature compensation
EP1805494A1 (en) * 2004-10-29 2007-07-11 Endress + Hauser GmbH + Co. KG Pressure gauge with hydraulic pressure transmission
WO2016048424A3 (en) * 2014-09-23 2016-08-11 Rosemount Inc. Cooling for industrial process variable transmitters
US9752946B2 (en) 2014-09-23 2017-09-05 Rosemount Inc. Cooling for industrial process variable transmitters
US9752947B2 (en) 2014-09-23 2017-09-05 P I Components Corp. Thermoelectric heating, cooling and power generation for direct mount and dual compartment fill remote seal systems
US9772246B2 (en) 2014-09-30 2017-09-26 Rosemount Inc. Fill fluid thermal management
US11313747B2 (en) 2014-09-30 2022-04-26 Rosemount Inc. Fill fluid thermal management

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