EP2019963A1 - Appareil et procédé pour tester des châssis à vitrage scellé - Google Patents

Appareil et procédé pour tester des châssis à vitrage scellé

Info

Publication number
EP2019963A1
EP2019963A1 EP07722711A EP07722711A EP2019963A1 EP 2019963 A1 EP2019963 A1 EP 2019963A1 EP 07722711 A EP07722711 A EP 07722711A EP 07722711 A EP07722711 A EP 07722711A EP 2019963 A1 EP2019963 A1 EP 2019963A1
Authority
EP
European Patent Office
Prior art keywords
gas
cassette
volume
glazing unit
cassettes
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Withdrawn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
EP07722711A
Other languages
German (de)
English (en)
Inventor
Kristian Møller KRISTENSEN
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.)
VKR Holding AS
Original Assignee
VKR Holding AS
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 VKR Holding AS filed Critical VKR Holding AS
Publication of EP2019963A1 publication Critical patent/EP2019963A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • G01M3/229—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators removably mounted in a test cell
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N2030/022—Column chromatography characterised by the kind of separation mechanism
    • G01N2030/025—Gas chromatography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8886—Analysis of industrial production processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/04—Preparation or injection of sample to be analysed
    • G01N30/24—Automatic injection systems

Definitions

  • the present invention relates to an apparatus and a method for testing sealed glazing units.
  • Sealed glazing units which are widespread, consist of several layers of glass, typically two layers, joined together so that there is a cavity between the layers.
  • the cavity between the layers is created by means of a frame to which the glass layers are glued.
  • the frame is typically made of aluminium, and the adhesive, which also acts as a sealant, is often butyl rubber.
  • the cavity between the layers of glass is filled with an insulating gas, for example argon.
  • selected glazing units are examined and tested to find out how much of the insulating gas diffuses from the cavity within a particular period.
  • the object of the present invention is to provide an apparatus and a method which allow the gas seal of sealed glazing units to be examined in a simple and uncomplicated way.
  • an apparatus for measuring the gas diffusion rate from a sealed glazing unit comprising at least one cassette with a known inner volume and adapted to contain a sealed glazing unit with a known volume so that a free rim volume exists along the periphery of the glazing unit in the cassette, the cassette being provided with at least one gas inlet and at least one gas outlet which can be connected to a gas chromatograph.
  • the cassette is constructed so that it is completely gastight when closed. Typically it is box-shaped with an inner volume corresponding to the glazing unit which it is to contain.
  • the inner volume of the cassette is slightly larger than the volume of the glazing unit so that a free rim volume in the shape of a channel can be formed along the periphery of the glazing unit when it is placed in the cassette.
  • This rim volume which extends the whole way around the rim or edge of the glazing unit, communicates with at least one gas inlet and at least one gas outlet formed in the material constituting the walls of the cassette.
  • the rim volume has substantially the same cross-sectional area in the entire cassette so that the gases can flow freely without meeting constrictions or expansions giving rise to pressure increases or pressure drops, respectively.
  • the gas outlet connected to the cassette is adapted so that it can be connected to a gas chromatograph capable of measuring the composition of the gas sampled from the cassette . and the rim volume.
  • the cassette may be made of any material which is stable as to shape and can be closed so as to be gastight. Preferred materials are stainless steel and aluminium.
  • the at least one gas outlet is connected to the gas chromatograph by means of an electrically controlled valve. This valve may in turn be controlled by a computer, thereby making it possible to automate the process in full or in part, thus minimising the proportion of manual work.
  • the gas chromatograph used is preferably a standard gas chromatograph, possibly adapted for automated measurements of gas samples. The measuring results are stored and processed on a computer with standard software.
  • the inner volume of the cassette or the cassettes is adjustable. This means that it is possible to use the same cassette for glazing units of different sizes. The adjustment may, for example, be made by inserting plates with a known volume. The glazing unit is thus fixed between the sides of the cassette. When the volume has been adjusted, it is also necessary to know the inner volume of the cassette and the volume of the glazing unit to be able to determine the rim volume.
  • the gas inlet is preferably placed in the upper part of the cassette, and the gas outlet is placed in the lower part of the cassette.
  • the gas is evenly distributed in the channel constituted by the rim volume so that measurements made on the gas sampled are representative.
  • the apparatus preferably comprises a plurality of cassettes, suitably 2-16 cassettes, preferably 4-12 cassettes, more preferably 6-8 cassettes.
  • the preferred numbers of cassettes reflect the number of glazing units currently considered suitable to test simultaneously.
  • glazing units can easily be tested simultaneously, if desired, for example 20 or more.
  • the present invention also relates to a method of determining the gas seal of sealed glazing units, the method comprising the following steps:
  • the volume of the glazing unit is determined;
  • the glazing unit is placed in a cassette with a known inner volume so that a free rim volume occurs along the periphery of the glazing unit;
  • the sample is analysed in a gas chromatograph;
  • the result of the analysis is processed by a calculating unit and compared with the volume and holding time whereby the gas diffusion rate of the insulating gas in the glazing unit is calculated.
  • the method is based on the fact that part of the insulating gas from the glazing unit will diffuse from the cavity between the glass layers out into the free rim volume over a specified period.
  • the diffusion rate over time can be calculated for the insulating gas.
  • the calculations can be made by a computer with standard software.
  • the flushing gas may, in principle, be any inert gas different from the insulating gas, the flushing gas is preferably helium.
  • the flushing is carried out to remove atmospheric air and vapours in the rim volume, and the flushing is preferably made by turbulent flow to ensure that all undesired gas is removed.
  • Helium is also used for calibrating the gas chromatograph.
  • the overpressure may not be so large that it influences the shape (and volume) of the glazing unit.
  • the overpressure is of no importance to the ability of the insulating gas to diffuse out into the rim volume as the partial pressure of the gas is decisive, that is, the insulating gas will endeavour to create the same partial pressure in the cavity between the glass layer and the rim volume.
  • the main component of the insulating gas is typically argon. Therefore, the gas chromatographic analysis typically determines the argon content.
  • the quantity sampled is in the order of 2-20 ml, preferably 5-15 ml, more preferably 8-12 ml, most preferably 10 ml. Possibly several samples may be taken successively.
  • the calculating unit is preferably a computer with standard software.
  • the computer may also be used for automated operation of the apparatus according to the invention.
  • Fig. 1 is a side view of the cassette for use in the invention
  • Fig. 2 is a cross-sectional view of the cassette
  • Fig. 3 shows a schematic diagram of the apparatus and the method according to the invention.
  • Fig. 4 is a graph showing the correlation between measurements of glazing units according to EN 1279 and according to the invention.
  • Fig. 1 shows a cassette 1 for use in the invention with a sealed glazing unit 2 arranged in it so that a rim volume 3 occurs along the periphery 4 of the glazing unit 2 and the inner wall 5 of the cassette 1. Openings 7, 8 are provided in the cassette wall 6 for a gas inlet and outlet, respectively.
  • the cassette 1 is shown with a removable end section 9, which is fastened sealingly to the cassette 1 by means of a gasket 10 and bolts 11, 12.
  • Fig. 2 shows part of the cross-section of the cassette 1 through the plane AA of Fig. 1.
  • the glazing unit 2 is arranged so that there is a rim volume 3 communicating with a gas inlet 7.
  • the glazing unit 2, which consists of two layers of glass 13, 14 glued to the frame 15 so that a cavity 16 occurs, is lying with one side against the inner wall 5 of the cassette and with its other side against a plate 17 serving to adjust the volume of the cassette 1.
  • the cassette 1 is shown with a removable side plate 18 which can be sealingly fastened to the cassette 1 by means of a gasket 19 and bolt 20.
  • Fig. 3 schematically shows the composition of an apparatus for use in the invention.
  • the apparatus comprises cassettes 101 containing sealed glazing units whose gas diffusion rate is to be determined. With tubes 102 and through valves 103, the cassettes are connected with gas cylinders 104 containing flushing gas and calibrating gas. Gas inlets 105 are arranged on the upper part of the cassettes. At the bottom of the cassettes there are gas outlets 106 which, through tubes 107 and valves 108, can be either ventilated 109 or connected to a gas chromatograph 110 capable of determining the composition of the gas. By tubes 111 and through valves 103, the gas chromatograph is also connected to the cylinders 104 with flushing and calibrating gas. The gas chromatograph 110 is connected with a computer 112 for processing the measuring results from the gas chromatograph 110. The computer 112 may also control the valves 103, 108 (through wiring - not shown) controlling the gas flows of the apparatus.
  • the cassettes 101 may possibly be immersed in water, not shown, to check that no gas leaks out of them. • . .
  • the above only illustrates the principles of the invention. It is evident that the apparatus may include more cassettes, and that there may be more gas cylinders, valves and connecting pipes, if desired.
  • Fig. 4 is a graph showing the correlation between gas diffusion rates measured according to EN 1279 (DIN 52 293) and according to the invention.
  • the glazing units measured were glazing units with a dimension of the rim volume of 0.5 cm, the rim volume having been flushed with helium for at least 24 hours and samples being taken after between 24 and 48 hours and again after 48 hours. Typically, several rim volumes will be flushed in turn.
  • the measurements were carried out with a Varian CP 3800 gas chromatograph.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

La présente invention concerne un appareil pour mesurer la vitesse de diffusion de gaz émanant d'un châssis à vitrage scellé (2), cet appareil comprenant au moins un cadre (1) de volume interne connu et adapté pour contenir un châssis à vitrage scellé (2) de volume connu de façon à avoir un volume sans bord le long de la périphérie du châssis vitré dans le cadre. Le cadre (1) est pourvu d'au moins un orifice d'admission du gaz (7) et d'au moins un orifice d'évacuation du gaz (8) qui peuvent être reliés à un chromatographe en phase gazeuse.
EP07722711A 2006-05-10 2007-05-10 Appareil et procédé pour tester des châssis à vitrage scellé Withdrawn EP2019963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200600659 2006-05-10
PCT/DK2007/050057 WO2007128322A1 (fr) 2006-05-10 2007-05-10 Appareil et procédé pour tester des châssis à vitrage scellé

Publications (1)

Publication Number Publication Date
EP2019963A1 true EP2019963A1 (fr) 2009-02-04

Family

ID=38222115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722711A Withdrawn EP2019963A1 (fr) 2006-05-10 2007-05-10 Appareil et procédé pour tester des châssis à vitrage scellé

Country Status (2)

Country Link
EP (1) EP2019963A1 (fr)
WO (1) WO2007128322A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100503A (zh) * 2017-05-08 2017-08-29 常熟市金亿复合材料有限公司 一种高效多性能中空玻璃板

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847474C2 (de) * 1978-11-02 1983-11-03 Bfg Glassgroup, Paris Vorrichtung zur Dichtigkeitsprüfung gasgefüllter Hohlkörper
FI113805B (fi) * 1998-04-03 2004-06-15 Licentia Oy Menetelmä ja laite kaasuseosten analysoimiseksi
DE202006008716U1 (de) * 2006-06-01 2006-08-24 Vkr Holding A/S Gerät zur Prüfung von Thermoscheiben

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2007128322A1 *

Also Published As

Publication number Publication date
WO2007128322A1 (fr) 2007-11-15

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