EP2373969A1 - Leckdetektionsverfahren - Google Patents
LeckdetektionsverfahrenInfo
- Publication number
- EP2373969A1 EP2373969A1 EP09774907A EP09774907A EP2373969A1 EP 2373969 A1 EP2373969 A1 EP 2373969A1 EP 09774907 A EP09774907 A EP 09774907A EP 09774907 A EP09774907 A EP 09774907A EP 2373969 A1 EP2373969 A1 EP 2373969A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detection method
- leak detection
- specimen
- test gas
- test
- 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- Withdrawn
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
- G01M3/202—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
-
- 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
Definitions
- the invention relates to a leak detection method in which a test specimen filled with a test gas is exposed to an air flow and the air flow or a partial flow thereof is examined for the presence of the test gas.
- test gas which leaks outside from the inside of the sample is detected by a test gas detector to which a partial current of the gas sucked out of the chamber is supplied.
- the known leak detection methods require the presence of a chamber enclosing the article, which is either pressure-tightly sealed against the environment or is in pneumatic communication with the environment. In any case, a room is required for the accommodation of the test object.
- sniffer leak detectors which are suitable for examining a non-enveloped test specimen.
- Such sniffer leak detectors have a rod-shaped thin probe through which ambient air is sucked. The probe is connected to a test gas detector capable of detecting the presence of test gas in the aspirated gas.
- a sniffer leak detector inevitably has a narrow spatial detection range. It is not only designed to detect the presence of a leak, but also to identify the location of the leak. If a leak is detected, the location of the leak is determined by the location of the probe tip during leak detection.
- the spatial detection range of a sniffer leak detector is therefore very narrow according to the nature of this leak detection method.
- the invention has for its object to provide a leak detection method that allows a leak detection without any restriction of the movement of the device under test and without the need for a wrapper.
- the leak detection method according to the present invention is defined by claim 1. It is characterized in that the air flow in the ambient atmosphere at substantially the entire surface of the non-enveloped test specimen in undirected flow is guided along exclusively by suction.
- the specimen is exposed without any enclosure an air flow, which is sucked into a large-sized suction opening.
- the suction opening has a diameter which is greater than 5% of the largest dimension of the specimen.
- the large suction opening ensures that the sucked-in air flow passes over substantially all outer surfaces of the test object, so that a leak present on the test object can be detected in any position, but without locating the location of the leak on the test object.
- the invention is also particularly suitable for leak testing of movable specimens. It makes it possible to check passing products, such as those produced in mass production, during their movement. Such products are, for example, pumps or containers which are filled with a test gas, in particular helium under overpressure. These products are integrally tested for leaks according to the method of the invention.
- the air flow has a relatively high flow rate of at least 100 standard 3 per second and in particular of at least 1 standard liter per second.
- the diameter of the suction tube is at least 5 cm, in particular at least 10 cm.
- Fig. 2 is a schematic representation of a second embodiment of the
- a suction pipe 10 is provided with a relatively large diameter.
- the diameter is at least 5 cm, in particular at least 10 cm.
- outside air is sucked in, which is illustrated by the arrows 12.
- the outside air is sucked in without any louvers, so that it is not only sucked axially into the intake manifold, but also with lateral components, as the arrows 12 show.
- FIG. 1 also shows a test gas detector 17a, which is designed as a quartz window detector.
- a quartz window detector is described in DE 100 31 882 A1. It has a housing 21 which is closed with a membrane 22. The membrane 22 is selectively permeable to the test gas, for example helium. Inside the housing 21 is a pressure sensor. At the membrane 22, the gas stream flows along. When test gas is present in the gas stream, it passes through the membrane 22 into the housing 21. Here, the pressure increases, which is displayed on a meter.
- the quartz window sensor does not require a vacuum in the region of the test object for its function.
- the cross-sectional area of the suction opening 11 should be at least 10% of the projected area of the specimen on the plane of the suction opening. In particular, it should be at least 20% of the projection area.
- the test can be carried out in such a way that the specimens 24 are moved along the suction opening 11 continuously or discontinuously.
- the inventive method is therefore suitable for mass or mass production. It is also possible to check a whole area or accumulations of specimens for the presence of leaks by the suction tube 10 is spent on the specimens. This allows the flexible hose 14th
- the conveyor unit 15 is arranged in the form of a fan inside the suction pipe 10.
- a hose as in the first embodiment does not exist.
- a test gas detector 17a can be connected to one of the sampling points 1, 2, a test gas detector 17a can be connected.
- FIG. 2 shows a quartz window sensor, but a mass spectrometric sensor could also be used.
- the Te ⁇ lstrommen steakstellen 1, 2 may be arranged in front of or behind the conveyor unit 15.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009004363.2A DE102009004363B4 (de) | 2009-01-08 | 2009-01-08 | Leckdetektionsverfahren |
PCT/EP2009/067196 WO2010079055A1 (de) | 2009-01-08 | 2009-12-15 | Leckdetektionsverfahren |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2373969A1 true EP2373969A1 (de) | 2011-10-12 |
Family
ID=41718767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09774907A Withdrawn EP2373969A1 (de) | 2009-01-08 | 2009-12-15 | Leckdetektionsverfahren |
Country Status (6)
Country | Link |
---|---|
US (1) | US8893543B2 (de) |
EP (1) | EP2373969A1 (de) |
JP (1) | JP2012514743A (de) |
CN (1) | CN102272570B (de) |
DE (1) | DE102009004363B4 (de) |
WO (1) | WO2010079055A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009059824A1 (de) | 2009-12-21 | 2011-06-22 | Inficon GmbH, 50968 | Verfahren und Vorrichtung zur Leckbestimmung |
US9038441B2 (en) * | 2012-01-20 | 2015-05-26 | TLI Enterprises, Inc. | High speed helium leak detection system and method |
US9032780B2 (en) * | 2012-03-28 | 2015-05-19 | Honeywell International Inc. | Detector with interchangeable sample probes |
DE102012220483A1 (de) * | 2012-11-09 | 2014-05-15 | Inficon Gmbh | Lecktestgerät |
DE102013217279A1 (de) * | 2013-08-29 | 2015-03-05 | Inficon Gmbh | Selbstreinigender Partikelfilter in einer Schnüffelsonde |
DE102013021313A1 (de) * | 2013-12-17 | 2015-06-18 | Robert Brockmann | Schnüffelsonde mit einer Fremdgasbarriere |
WO2016130119A1 (en) | 2015-02-11 | 2016-08-18 | Lone Star Leak Detection, Llc | Liquid level monitoring for reservoirs |
JP6534627B2 (ja) | 2016-03-15 | 2019-06-26 | 日揮株式会社 | 被検査容器の漏洩検査方法、及び漏洩検査装置 |
DE102017007149A1 (de) * | 2017-07-27 | 2019-01-31 | DILO Armaturen und Anlagenbau GmbH | Verfahren zur Lokalisierung von Leckstellen |
DK180705B1 (en) | 2019-12-20 | 2021-12-07 | Agramkow Fluid Systems As | Leak detector |
DE102021119256A1 (de) * | 2021-07-26 | 2023-01-26 | Inficon Gmbh | Leckdetektoren |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837228A (en) * | 1973-04-09 | 1974-09-24 | Vacuum Inst Corp | Tracer gas-permeable probe for leak detectors |
WO2006120122A1 (de) * | 2005-05-12 | 2006-11-16 | Inficon Gmbh | Schnüffellecksucher mit quarzfenstersensor |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1138254B (de) * | 1960-02-18 | 1962-10-18 | Kernreaktor Bau Und Betr S Ges | Lecksuchroehre nach dem Massenspektrometerprinzip |
DE1923012A1 (de) * | 1969-05-06 | 1970-11-19 | Schwarzkopf Gmbh Hans | Vorrichtung zur Pruefung der Dichtheit von Behaeltern,insbesondere Aerosoldosen |
US4459844A (en) * | 1982-06-17 | 1984-07-17 | Smith & Denison | Gas separation chamber and portable leak detection system |
US4601194A (en) * | 1983-01-18 | 1986-07-22 | Damco Testers, Inc. | Method and apparatus for leak testing of pipe |
JPS6336128A (ja) * | 1986-07-31 | 1988-02-16 | Mitsubishi Heavy Ind Ltd | ガス封入機器の漏洩検査装置 |
JPH0737912B2 (ja) * | 1987-09-22 | 1995-04-26 | 食品産業オンラインセンサー技術研究組合 | 窒素ガス充填包装体におけるリークの検査方法 |
EP0432305B1 (de) * | 1989-12-15 | 1994-02-02 | ALCATEL HOCHVAKUUMTECHNIK GmbH | Vorrichtung und Verfahren zur Leckprüfung |
DE4326265A1 (de) * | 1993-08-05 | 1995-02-09 | Leybold Ag | Testgasdetektor, vorzugsweise für Lecksuchgeräte, sowie Verfahren zum Betrieb eines Testgasdetektors dieser Art |
US5417105A (en) | 1994-02-18 | 1995-05-23 | Hughes Aircraft Company | Flow accelerator for leak detector probe |
US5563335A (en) | 1995-02-28 | 1996-10-08 | Gas Research Institute | High flow rate sampler for measuring emissions at process components |
US5537879A (en) | 1995-08-02 | 1996-07-23 | Praxair Technology, Inc. | Particle sampling system for gas supply system |
GB9913443D0 (en) | 1999-06-09 | 1999-08-11 | Air Dispersions Ltd | Sampling devices |
US6314793B1 (en) * | 1999-09-28 | 2001-11-13 | Gas Research Institute | Test device for measuring chemical emissions |
DE10031882A1 (de) | 2000-06-30 | 2002-01-10 | Leybold Vakuum Gmbh | Sensor für Helium oder Wasserstoff |
DE10110987B4 (de) * | 2001-03-07 | 2005-09-22 | Wöhler Meßgeräte Kehrgeräte GmbH | Verfahren für die Bestimmung einer Leckrate |
US6619103B1 (en) * | 2002-02-25 | 2003-09-16 | Advanced Test Products, Inc. | Sample flow path assembly for electronic gas leak detectors |
DE602004032333D1 (de) * | 2003-06-11 | 2011-06-01 | Agilent Technologies Inc | Vorrichtung und verfahren zur detektion von grossen leckagen in abgedichteten gegenständen |
JP4026579B2 (ja) | 2003-10-16 | 2007-12-26 | 株式会社デンソー | 気密漏れ検査方法及び装置 |
WO2005054806A1 (en) | 2003-12-05 | 2005-06-16 | Sensistor Technologies Ab | System and method for determining the leakproofness of an object |
US7743670B2 (en) * | 2006-08-14 | 2010-06-29 | Applied Materials, Inc. | Method and apparatus for gas flow measurement |
DE102006056215A1 (de) * | 2006-11-29 | 2008-06-05 | Inficon Gmbh | Schnüffellecksuchgerät |
US7905132B1 (en) * | 2007-08-14 | 2011-03-15 | LACO Technologies, Inc. | Leak testing using tracer gas permeable membrane |
-
2009
- 2009-01-08 DE DE102009004363.2A patent/DE102009004363B4/de active Active
- 2009-12-15 US US13/142,981 patent/US8893543B2/en active Active
- 2009-12-15 JP JP2011544829A patent/JP2012514743A/ja active Pending
- 2009-12-15 EP EP09774907A patent/EP2373969A1/de not_active Withdrawn
- 2009-12-15 WO PCT/EP2009/067196 patent/WO2010079055A1/de active Application Filing
- 2009-12-15 CN CN200980154202.9A patent/CN102272570B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837228A (en) * | 1973-04-09 | 1974-09-24 | Vacuum Inst Corp | Tracer gas-permeable probe for leak detectors |
WO2006120122A1 (de) * | 2005-05-12 | 2006-11-16 | Inficon Gmbh | Schnüffellecksucher mit quarzfenstersensor |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010079055A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102272570A (zh) | 2011-12-07 |
JP2012514743A (ja) | 2012-06-28 |
WO2010079055A1 (de) | 2010-07-15 |
US20110283769A1 (en) | 2011-11-24 |
US8893543B2 (en) | 2014-11-25 |
DE102009004363A1 (de) | 2010-07-15 |
CN102272570B (zh) | 2014-10-08 |
DE102009004363B4 (de) | 2022-08-25 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110701 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BOHN, MARTIN Inventor name: ROLFF, NORBERT Inventor name: PUCHALLA, JOCHEN Inventor name: DAUENHAUER, MICHAEL |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20121015 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20170208 |