EP0401643A2 - Tête de sondage à ultrasons - Google Patents

Tête de sondage à ultrasons Download PDF

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Publication number
EP0401643A2
EP0401643A2 EP90110153A EP90110153A EP0401643A2 EP 0401643 A2 EP0401643 A2 EP 0401643A2 EP 90110153 A EP90110153 A EP 90110153A EP 90110153 A EP90110153 A EP 90110153A EP 0401643 A2 EP0401643 A2 EP 0401643A2
Authority
EP
European Patent Office
Prior art keywords
test head
liquid
film
head according
testing
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Withdrawn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
EP90110153A
Other languages
German (de)
English (en)
Other versions
EP0401643A3 (fr
Inventor
Hans-Dieter Blasius
Peter Kanngiesser
Klaus C/O Bundesanstalt Matthies
Ralph Bundesanstalt für Materialforschung Beyer
Heinz Bundesanstalt für Materialforschung Mrasek
Hermann Dr. Bundesanstalt Wüstenberg
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.)
Siemens AG
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
Siemens 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 Interatom Internationale Atomreaktorbau GmbH, Siemens AG filed Critical Interatom Internationale Atomreaktorbau GmbH
Publication of EP0401643A2 publication Critical patent/EP0401643A2/fr
Publication of EP0401643A3 publication Critical patent/EP0401643A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface

Definitions

  • the present invention relates to an ultrasonic test head for the contactless testing of components in a liquid, in particular for the volumetric testing of metallic components in liquid sodium up to approx. 250 ° C., with a housing which can be immersed in the liquid and is acoustically coupled with a piezo element, a damping body and a transformation layer adjacent to the liquid.
  • Test heads of this type are of particular interest for sodium-cooled nuclear reactor plants because the liquid metal present in them is neither to be lowered nor to be drained, since it is used to cool radioactive core elements. Components that are still wetted with the liquid sodium cannot be properly checked using the usual optical or acoustic methods, such as with water reactors. In addition, access to the outside air would lead to oxidation and contamination of the liquid sodium.
  • the object of the present invention is to provide an ultrasonic probe with a liquid submersible housing with a relatively broadband frequency spectrum and relatively short sound pulses for contactless testing of components in a liquid, especially for volumetric testing of metallic components in liquid sodium up to approx. 250 ° C.
  • an ultrasonic test head for the contact-free testing of components in a liquid, in particular for the volumetric testing of metallic components in liquid sodium, with a housing immersed in the liquid and acoustically coupled therein a piezo element, a damping body and one to the liquid Adjacent transformation layer consisting of a soundproof film and a soundproof film, which is supported on the outside on one or more webs or a grid formed from these webs.
  • a thermally stable and vacuum-tight design as well as the use of different signal conductors adapted to the operating temperatures (metallic sheathed measuring conductors or coaxial cables in protective tubes) is possible as well as the transformer adaptation of the transducer impedance according to the required working frequency to the impedance value of the medium, e.g. B. liquid sodium.
  • the thin-walled transformation layer desired in terms of sound technology can be realized without stressing one another with excessive contact pressure of the individual elements.
  • the combination of an outer foil made of an austenite and an inner foil made of Kapton has proven itself well in tests.
  • the proposed gold plating of the film leads to a perfect wetting when immersed in sodium and not disturbed by oxide layers. This gold layer is later dissolved by the sodium during operation.
  • lead metaniobate is proposed as the material for the piezo element.
  • Low mechanical quality means higher mechanical losses in the ceramic, which is of great importance with regard to short pulses.
  • This material is suitable up to an operating temperature of 250 ° C.
  • a material which consists of a two-component cement which is filled with different amounts of tungsten powder (10 - 40%) or chamotte flour (10 - 30%) to adapt to the desired wave resistance.
  • the damping body can also consist of an aluminum oxide ceramic.
  • the internally threaded housing 1 has at its lower end a conical ring 2, which is sealed on the outside by means of a thin laser weld 3 against the housing 1.
  • this ring initially carries a thin stainless steel foil 4, which is supported on a plurality of parallel webs 5, and a Kapton foil 6, which, together with the stainless steel foil 4, forms an acoustic transformation layer between the liquid metal and the piezoelectric vibrator 7.
  • This consists of lead metanobate and is damped on its top by a damping body 8, which is surrounded by a cylindrical insulating tube 9 and with a Insulating washer 10, e.g. B. from AL2O3, is covered.
  • a stamp 11 which is pressed by disc springs 12, which are supported by a spherical compensating piece 13 on a height-adjustable threaded pressure ring 14.
  • the parts arranged above the damping body 8 centrally surround an insulating tube 15, for. B. from AL2O3 through which a signal conductor 16 as an electrical connection of the vibrator 7 is led out isolated.
  • the insulating tube 9 surrounding the damping body 8 is slotted on one side in order to connect a ground connection 17 to a metallic threaded ring 18.
  • the housing 1 is closed and welded at its upper end with a cover 19, which carries a small connecting piece 20 for fastening a protective tube 21 for the coaxial conductor 22.
  • This test head can be designed and built for the frequencies that are usual or necessary for non-destructive tests and is sodium-compatible, gamma-radiation-resistant and temperature-resistant. It is a single-swing vertical test head that is used in immersion technology in vertical and angular insonification with the liquid metal as the lead section. With its help, defects (discrepancies) in the depth of the material as well as cracks on the surface of components can be detected. Lateral and axial resolution depends on the working frequency and pulse width.
  • the outer foil 4 made of austenite, e.g. B. 1.4550, with a thickness of 50 microns and the inner film 6 of Kapton also with a thickness of 50 microns.
  • the thickness of the film can be calculated using the methods described in the literature mentioned above.
  • the duration of the sound in the liquid metal should be about 10 times longer than the duration in the test object in order to avoid incorrect assignment of the echo signals. This can be set by the length of the lead section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP19900110153 1989-06-07 1990-05-29 Tête de sondage à ultrasons Withdrawn EP0401643A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8906992U DE8906992U1 (de) 1989-06-07 1989-06-07 Ultraschall-Prüfkopf
DE8906992U 1989-06-07

Publications (2)

Publication Number Publication Date
EP0401643A2 true EP0401643A2 (fr) 1990-12-12
EP0401643A3 EP0401643A3 (fr) 1992-03-25

Family

ID=6839898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900110153 Withdrawn EP0401643A3 (fr) 1989-06-07 1990-05-29 Tête de sondage à ultrasons

Country Status (2)

Country Link
EP (1) EP0401643A3 (fr)
DE (1) DE8906992U1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119147A1 (de) * 1991-06-11 1993-02-18 Morgenstern Juergen Nachweisgeraet fuer aktiv abstrahlende flaechen von ultraschall-schwingern
DE4240719C1 (de) * 1992-12-03 1994-01-27 Siemens Ag Ultraschall-Wandler mit Dämpfungskörper für hohe Arbeitstemperaturen
EP0679874A2 (fr) * 1994-04-25 1995-11-02 Siemens Aktiengesellschaft Capteur du son
WO1997026513A1 (fr) * 1996-01-20 1997-07-24 Forschungszentrum Karlsruhe Gmbh Detecteur d'ondes de pression piezoelectrique
EP0974814A1 (fr) * 1998-07-22 2000-01-26 Endress + Hauser Flowtec AG Dispositif transducteur à ultrasons
US6127770A (en) * 1996-01-20 2000-10-03 Forschungszentrum Karlsrahe Gmbh Pressure wave sensor
WO2015180941A1 (fr) * 2014-05-28 2015-12-03 Aktiebolaget Skf Couplant et ensemble formé d'un couplant, d'un transducteur et d'un élément de construction
US20160341703A1 (en) * 2014-01-22 2016-11-24 Siemens Aktiengesellschaft Ultrasonic test apparatus and method for ultrasonic testing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935484A (en) * 1974-02-25 1976-01-27 Westinghouse Electric Corporation Replaceable acoustic transducer assembly
DE3303412A1 (de) * 1983-02-02 1984-08-02 Krautkrämer GmbH, 5000 Köln Ultraschallpruefkopf

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935484A (en) * 1974-02-25 1976-01-27 Westinghouse Electric Corporation Replaceable acoustic transducer assembly
DE3303412A1 (de) * 1983-02-02 1984-08-02 Krautkrämer GmbH, 5000 Köln Ultraschallpruefkopf

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BRITISH JOURNAL OF NON-DESTRUCTIVE TESTING, Band 31, Nr. 5, Mai 1989, Seiten 259-264, Northampton, GB; J.R. FOTHERGILL et al.: "Development of high-temperature ultrasonic transducers for under-sodium viewing applications" *
STAATLICHE MATERIALPR]FUNGSANSTALT UNIVERSIT[T STUTTGART, 12. MPA-Seminar, 9.-10. Oktober 1986, Band 1, Seiten 21.1 - 21.25; K. MATTHIES et al.: "Ultraschallpr}fung von Komponenten und Anlagen bei Temperaturen bis 250 Grade Celsius" *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119147A1 (de) * 1991-06-11 1993-02-18 Morgenstern Juergen Nachweisgeraet fuer aktiv abstrahlende flaechen von ultraschall-schwingern
DE4240719C1 (de) * 1992-12-03 1994-01-27 Siemens Ag Ultraschall-Wandler mit Dämpfungskörper für hohe Arbeitstemperaturen
EP0679874A2 (fr) * 1994-04-25 1995-11-02 Siemens Aktiengesellschaft Capteur du son
EP0679874A3 (fr) * 1994-04-25 1996-03-20 Siemens Ag Capteur du son.
WO1997026513A1 (fr) * 1996-01-20 1997-07-24 Forschungszentrum Karlsruhe Gmbh Detecteur d'ondes de pression piezoelectrique
US6127770A (en) * 1996-01-20 2000-10-03 Forschungszentrum Karlsrahe Gmbh Pressure wave sensor
EP0974814A1 (fr) * 1998-07-22 2000-01-26 Endress + Hauser Flowtec AG Dispositif transducteur à ultrasons
US20160341703A1 (en) * 2014-01-22 2016-11-24 Siemens Aktiengesellschaft Ultrasonic test apparatus and method for ultrasonic testing
WO2015180941A1 (fr) * 2014-05-28 2015-12-03 Aktiebolaget Skf Couplant et ensemble formé d'un couplant, d'un transducteur et d'un élément de construction
CN106471366A (zh) * 2014-05-28 2017-03-01 斯凯孚公司 耦合剂以及耦合剂、换能器和结构部件的组合单元
US10598634B2 (en) 2014-05-28 2020-03-24 Aktiebolaget Skf Couplant and arrangement of couplant, transducer, and construction component
CN106471366B (zh) * 2014-05-28 2020-03-31 斯凯孚公司 耦合剂以及耦合剂、换能器和结构部件的组合单元

Also Published As

Publication number Publication date
DE8906992U1 (de) 1990-10-04
EP0401643A3 (fr) 1992-03-25

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