WO1995000827A1 - Verfahren und vorrichtung zur dichtheitsprüfung von hohlkörpern - Google Patents
Verfahren und vorrichtung zur dichtheitsprüfung von hohlkörpern Download PDFInfo
- Publication number
- WO1995000827A1 WO1995000827A1 PCT/DE1994/000691 DE9400691W WO9500827A1 WO 1995000827 A1 WO1995000827 A1 WO 1995000827A1 DE 9400691 W DE9400691 W DE 9400691W WO 9500827 A1 WO9500827 A1 WO 9500827A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- test
- hollow body
- test gas
- air
- Prior art date
Links
Classifications
-
- 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
- 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
- G01M3/202—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 using mass spectrometer detection systems
Definitions
- the invention relates to a method and a device for leak testing of hollow bodies.
- test specimen was previously filled with air and exposed to a defined differential pressure. In the event of a leak, pressure changes could then be detected, which were of different magnitude depending on the size of the leak.
- this test method has the disadvantage that the detectable pressure differences were very slow and the measurement was temperature and volume dependent.
- test object was also filled with a test gas such as helium, which could be detected using specific and sensitive measurement methods.
- a test gas such as helium
- the partial pressure changes resulting from a leak have been recorded with a helium mass spectrometer.
- this method also has its limits because the use of helium causes high costs and, in the event of a major leak, the test chamber is contaminated with the test gas, so that subsequent measurements have always been impaired.
- the object of the present invention is therefore to provide a method and a device for leak testing of hollow bodies, as a result of which an inexpensive, quick and sensitive test is possible.
- the object is achieved by using part of the test gas as test gas and another part of the test gas as aeration gas and analyzing individual components of the test gas on the side of the lower pressure.
- air is used as the test gas. Air offers a significant cost advantage over conventional test gases and simplifies the process as a whole.
- the method according to the invention makes it possible, in particular in the event of a major leak and contamination of the test chamber with a test gas component, to no longer use the component in question in the test gas and to switch to a different combination. In this way, different test gases can be used in any order, without reducing the sensitivity of detection and losing the production cycle.
- FIG. 1 shows a special embodiment of the invention using a preferred device for testing the tightness of hollow bodies. Based on this, the invention is explained in more detail below.
- the test gas 7 passes through a valve 8 to a separator 4, which ensures that the test gas is separated.
- a separator 4 For example, an air separation device with molecular sieve separation processes or an adsorption catalyst process can be used as the separator 4.
- the test gas is broken down into individual gas components. If air is used as the test gas, the gas components consist, for example, of nitrogen, oxygen, carbon dioxide, ozone, noble gases or other air components that occur in each case. It has proven to be advantageous to essentially separate the air used as the test gas into two gas components, for example in
- test chamber 2 After gas separation, selected gas components are passed via a line 5 into the interior 9 of the test chamber 2.
- the test chamber 2 is previously evacuated via the line 10 and the pump 11, so that after opening the valve 12 the gas can flow in as aeration gas.
- the hollow body 1 is also evacuated via a line 13 and a pump 14. The other part of the test gas, which serves as the test gas, reaches this via a line 6.
- a differential pressure ⁇ p is set between the interior 9 of the test chamber 2 and the interior 15 of the hollow body 1. The pressure in
- Hollow body 1 in the system shown here is larger than that in the test chamber 2.
- gas flows from the interior 15 into the test chamber 2.
- the gas composition also changes to the test chamber 2.
- This change can be detected by means of gas-selective test gas measuring devices 3, for example by means of a mass spectrometer, an infrared measuring system, a heat conduction measuring system or an ionization method.
- Qualitative and quantitative tative differences are determined, in particular, by changes in partial pressure.
- An evaluation can e.g. based on the respective mass peaks, e.g. on the
- the test method according to the invention can basically be used for any objects. It is particularly suitable for leak testing of drums, compressors, wheels, cans, torque converters, oil pans and generally of gas, steam and liquid-carrying systems and components. If the object to be tested does not itself represent a hollow body, it is possible to to expand it for this purpose, so that, for example, flat or differently shaped components can also be tested.
- a device for leak testing of hollow bodies essentially comprises a test chamber 2 for receiving the hollow body 1 as well as a gas measuring device 3 connected to the test chamber 2 and a separator 4 which is connected to the test chamber 2 via a line 5 and to the hollow body 1 via a line 6 is.
- a gas measuring device 3 connected to the test chamber 2
- a separator 4 which is connected to the test chamber 2 via a line 5 and to the hollow body 1 via a line 6 is.
- there may be measuring and regulating devices which also enable automatic operation of the device.
- FIG. 2 A process engineering and apparatus simplification of the invention is shown in FIG. 2.
- the test chamber can even be omitted.
- the hollow body 1 is provided with a sealing head 16.
- This sealing head 16 can have one or more openings 17, 18 through which lines 19, 20 extend into the interior 15 of the hollow body 1.
- the hollow body 1 is filled with ventilation gas. After opening the valve 21, the air is drawn off from the hollow body 1 via the line 19 by means of the pump 22, so that ventilation gas can get into the hollow body 1 via the line 23 after opening the valve 24.
- This exchange can take place cyclically but also continuously.
- the end 25 of the line 20 can extend into the vicinity of the bottom 26 of the hollow body 1, while the end 27 of the line 19 only projects into the upper region 28 of the hollow body 1.
- ventilation gases are used that have a higher density than the air, such as carbon dioxide.
- the ends 25, 27 of the lines 20, 15 can also be arranged differently.
- the hollow body 1 can be filled with aeration gas by first evacuating the hollow body 1 and then filling it with aeration gas.
- a differential pressure is set in relation to the outside atmosphere.
- air then penetrates into the interior 15 from the outside atmosphere, as a result of which the gas composition changes here.
- gas components of the test gas enter the hollow body 1, which have been wholly or partly removed from the ventilation gas.
- Such changes can also be detected here by means of a gas-selective measuring device 29.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4494302A DE4494302C1 (de) | 1993-06-19 | 1994-06-20 | Verfahren und Vorrichtung zur Dichtheitsprüfung von Hohlkörpern |
AU69680/94A AU6968094A (en) | 1993-06-19 | 1994-06-20 | Process and device for testing the tightness of hollow bodies |
DE4494302D DE4494302D2 (de) | 1993-06-19 | 1994-06-20 | Verfahren und Vorrichtung zur Dichtheitsprüfung von Hohlkörpern |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934320363 DE4320363A1 (de) | 1993-06-19 | 1993-06-19 | Verfahren und Vorrichtung zur Dichtheitsprüfung von Hohlkörpern |
DEP4320363.9 | 1993-06-19 | ||
DE19934337657 DE4337657A1 (de) | 1993-11-04 | 1993-11-04 | Verfahren und Vorrichtung zur Dichtheitsprüfung von Hohlkörpern |
DEP4337657.6 | 1993-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995000827A1 true WO1995000827A1 (de) | 1995-01-05 |
Family
ID=25926925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1994/000691 WO1995000827A1 (de) | 1993-06-19 | 1994-06-20 | Verfahren und vorrichtung zur dichtheitsprüfung von hohlkörpern |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU6968094A (de) |
DE (1) | DE4494302C1 (de) |
WO (1) | WO1995000827A1 (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19714601A1 (de) * | 1996-04-11 | 1997-11-06 | Kermi Gmbh | Heizkörper-Dichtigkeitsprüfanlage |
WO1998004912A1 (de) * | 1996-07-24 | 1998-02-05 | Siemens Aktiengesellschaft | Einrichtung zur gasanalyse in explosionsgefährdeten bereichen |
US6134536A (en) * | 1992-05-29 | 2000-10-17 | Swychco Infrastructure Services Pty Ltd. | Methods and apparatus relating to the formulation and trading of risk management contracts |
EP1533602A2 (de) * | 2003-11-19 | 2005-05-25 | Eaton Fluid Power GmbH | Messverfahren und -einrichtung für CO2-Leckagen und -Permeationen |
WO2007012629A1 (de) * | 2005-07-27 | 2007-02-01 | Boehringer Ingelheim International Gmbh | Verfahren zur überprüfung der permeabilitätsrate eines geschlossenen behälters |
DE102008037300A1 (de) * | 2008-08-11 | 2010-02-25 | Robert Brockmann | Herstellung eines Reingases, insbesondere für die Dichtheitsprüfung an einem druckbeaufschlagten Bauteil |
WO2013000565A1 (de) * | 2011-06-30 | 2013-01-03 | Sartorius Stedim Biotech Gmbh | Prüfverfahren und -vorrichtung für bioreaktorbehälter sowie verwendung |
FR2993659A1 (fr) * | 2012-07-23 | 2014-01-24 | Adixen Vacuum Products | Procede et installation de detection pour le controle d'etancheite d'emballages de produits scelles |
AT15523U3 (de) * | 2017-02-07 | 2018-03-15 | Krockenberger Rainer | Gerät zur Dichtheitsprüfung |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10324766A1 (de) * | 2003-05-31 | 2004-12-16 | Inficon Gmbh | Leckraten-Messvorichtung |
DE102014013522B4 (de) * | 2014-09-12 | 2017-03-30 | Sartorius Stedim Biotech Gmbh | Verfahren und Vorrichtung zur Durchführung eines Integritätstests an einem flexiblen Testbehälter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63253814A (ja) * | 1987-04-09 | 1988-10-20 | クラレケミカル株式会社 | 通信ケ−ブル保存方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4129070A1 (de) * | 1991-09-02 | 1993-03-04 | Grundig Emv | Verfahren zur durchfuehrung von lecktests bei abgastestgeraeten |
-
1994
- 1994-06-20 WO PCT/DE1994/000691 patent/WO1995000827A1/de active Application Filing
- 1994-06-20 AU AU69680/94A patent/AU6968094A/en not_active Abandoned
- 1994-06-20 DE DE4494302A patent/DE4494302C1/de not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63253814A (ja) * | 1987-04-09 | 1988-10-20 | クラレケミカル株式会社 | 通信ケ−ブル保存方法 |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Week 8848, Derwent World Patents Index; AN 88-341753 * |
R.LARSON: "Degenwaertiger Stand der Entwicklung bei Heliummassenspektrometer-Lecksuchern.", TECHNISCHES MESSEN, vol. 49, no. 5, May 1982 (1982-05-01), MUENCHEN ,DE, pages 193 - 199 * |
W.JANSEN: "Grundlagen der Dichtheitspruefung mit Hilfe von Testgasen", VAKUUM TECHNIK, vol. 29, no. 4, 1900, IDSTEIN/TAUNUS,DE, pages 105 - 113 * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6134536A (en) * | 1992-05-29 | 2000-10-17 | Swychco Infrastructure Services Pty Ltd. | Methods and apparatus relating to the formulation and trading of risk management contracts |
DE19714601A1 (de) * | 1996-04-11 | 1997-11-06 | Kermi Gmbh | Heizkörper-Dichtigkeitsprüfanlage |
WO1998004912A1 (de) * | 1996-07-24 | 1998-02-05 | Siemens Aktiengesellschaft | Einrichtung zur gasanalyse in explosionsgefährdeten bereichen |
EP1533602A2 (de) * | 2003-11-19 | 2005-05-25 | Eaton Fluid Power GmbH | Messverfahren und -einrichtung für CO2-Leckagen und -Permeationen |
EP1533602A3 (de) * | 2003-11-19 | 2008-01-30 | Eaton Fluid Power GmbH | Messverfahren und -einrichtung für CO2-Leckagen und -Permeationen |
WO2007012629A1 (de) * | 2005-07-27 | 2007-02-01 | Boehringer Ingelheim International Gmbh | Verfahren zur überprüfung der permeabilitätsrate eines geschlossenen behälters |
US8087286B2 (en) | 2005-07-27 | 2012-01-03 | Boehringer Ingelheim International, Gmbh | Method for checking the permeability rate of a closed container |
US8661847B2 (en) | 2008-08-11 | 2014-03-04 | Robert Brockmann | Production of a clean gas, in particular for testing a pressurized construction component for leaks |
DE102008037300A1 (de) * | 2008-08-11 | 2010-02-25 | Robert Brockmann | Herstellung eines Reingases, insbesondere für die Dichtheitsprüfung an einem druckbeaufschlagten Bauteil |
WO2013000565A1 (de) * | 2011-06-30 | 2013-01-03 | Sartorius Stedim Biotech Gmbh | Prüfverfahren und -vorrichtung für bioreaktorbehälter sowie verwendung |
EP2952867A1 (de) * | 2011-06-30 | 2015-12-09 | Sartorius Stedim Biotech GmbH | Prüfverfahren und -vorrichtung für bioreaktorbehälter |
US9534980B2 (en) | 2011-06-30 | 2017-01-03 | Sartorius Stedim Biotech Gmbh | Test method and apparatus for bioreactor containers having reception sheet clamped between bioreactor container and bioreactor container compartment |
WO2014016308A1 (fr) * | 2012-07-23 | 2014-01-30 | Adixen Vacuum Products | Procede et installation de detection pour le controle d'etancheite de produits scelles |
FR2993659A1 (fr) * | 2012-07-23 | 2014-01-24 | Adixen Vacuum Products | Procede et installation de detection pour le controle d'etancheite d'emballages de produits scelles |
US9841345B2 (en) | 2012-07-23 | 2017-12-12 | Adixen Vacuum Products | Detection method and facility for checking sealed products for leaks |
AT15523U3 (de) * | 2017-02-07 | 2018-03-15 | Krockenberger Rainer | Gerät zur Dichtheitsprüfung |
Also Published As
Publication number | Publication date |
---|---|
DE4494302C1 (de) | 1998-04-16 |
AU6968094A (en) | 1995-01-17 |
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