EP1597556A1 - Test-gas leak detector - Google Patents
Test-gas leak detectorInfo
- Publication number
- EP1597556A1 EP1597556A1 EP03789352A EP03789352A EP1597556A1 EP 1597556 A1 EP1597556 A1 EP 1597556A1 EP 03789352 A EP03789352 A EP 03789352A EP 03789352 A EP03789352 A EP 03789352A EP 1597556 A1 EP1597556 A1 EP 1597556A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leak detector
- housing
- vacuum pump
- detector according
- high vacuum
- 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
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
- G01M3/205—Accessories or associated equipment; Pump constructions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
Definitions
- the invention relates to a test gas leak detector with the features of the preamble of claim 1.
- a leak detector with these features is known from DE 31 24 205 AI. It comprises a high-vacuum pump, which is designed as a turbomolecular pump and to the inlet of which a test gas detector is connected, and a forevacuum pump.
- the high vacuum pump is also equipped with an intermediate inlet and an outlet.
- a line system is connected to these connections which, in addition to the lines, has valves and connections for a test specimen and for the backing pump.
- the components mentioned are arranged in such a way that the test object is connected to the intermediate inlet of the high vacuum pump via a first valve.
- the device under test is also connected to the inlet of the backing pump via a second valve.
- the outlet of the high vacuum pump is connected to the inlet of the fore vacuum pump via a third valve.
- test gas leak detector is complex because it consists of a large number of individual components.
- Another disadvantage is the adaptation of the properties of the test gas leak detector to different leak detection methods or test objects.
- the high vacuum pump is to be replaced by another one that is adapted to the changed circumstances. This assumes that the line valve system and the test gas detector have to be disconnected from the connections of the high vacuum pump and then connected to the connections of the new high vacuum pump in a vacuum-tight manner. The more intermediate connections the high vacuum pump has, the greater the effort. From DE 195 23 430 AI it is known to equip the high vacuum pump with several intermediate connections. Designs of this type have been used more and more recently.
- the present invention has for its object to simplify the structure of a test gas leak detector of the type mentioned and to reduce the assembly effort that is necessary when adapting the leak detector to different leak detection methods or test objects.
- the international publication WO 99/61799 shows how the insert must be constructed.
- the envelope structure essentially only has the function of ensuring the mutual assignment of the individual components of the high vacuum pump (stator, motor, shaft, rotor).
- the housing of the leak detector takes on the function of the otherwise usual housing of the high-vacuum pump, namely sealing the pump-active components to the outside and contributing to the connection of the pump to the test gas detector (support of a connecting flange, connection to intermediate inlets).
- the insert consists of two or three sections; However, it expediently consists of a uniform, stable structure which can be assembled and disassembled as a whole.
- the suction capacity of the test gas leak detector can be adapted to changed circumstances. It is advantageous here that the removal or the change of the insert has no influence whatsoever on the position of the valves, that is, it is not associated with an undesired opening of connecting channels.
- the simple separation of the housing of the leak detector from the insertion of the high vacuum pump has the advantage that a cast, high vacuum block with integrated channels and components and with the receptacle provided therein can be used as the housing of the leak detection device.
- Figure 1 is a vacuum scheme for a leak detector of the type according to the invention.
- FIG. 2 shows a section through an exemplary embodiment for a leak detector according to the invention.
- Essential components of the leak detector 1 shown in FIGS. 1 and 2 are a high-vacuum pump 2 with several stages, a test gas detector 5 connected to the inlet 3 of the high-vacuum pump - expediently via a valve 4 (only in FIG. 1) (when using helium as the test gas) usually a mass spectrometer) and a backing pump 6 (only in FIG. 1).
- the high vacuum pump is designed as a compound friction pump. It has a turbomolecular pump stage 7 on the suction side and a molecular pump stage 8 on the pressure side, e.g. B. a thread step.
- the housing of the leak detector is designated 9.
- the rotor 11 with its rotor blades 12 and the stator 13 with its stator blades 14 are components of the turbomolecular pump stage.
- the stator blades 14 are held between spacer rings 15.
- Components of the molecular pump stage 8 are a rotating cylinder 21, on the outside of which a stator 25 equipped with a thread 22 is assigned.
- the inlet of the leak detector 1 is designated 27. In a known manner, it serves to exclude a test specimen to be examined for leaks, a leak detection chamber or a sniffer.
- Line 28 connects to inlet 27, via which gases are sucked in which contain test gas in the event of a defective test specimen.
- the test gas line 28 is connected via the line sections 31, 32, each equipped with a valve 33 or 34, to the stages 7, 8 of the high vacuum pump 2. Furthermore, the line 28 is connected via the line section 35 with the valve 36 to the inlet of the fore-vacuum pump 6.
- the line extending between the outlet of the high vacuum pump 2 and the inlet of the fore vacuum pump 6 is denoted by 37. It is equipped with the valve 38.
- a leak detection process takes place as follows: First, the test object or the leak detection chamber with the valve 36 open - all other valves are closed - is evacuated with the help of the fore-vacuum pump 6. The gross leak detection then begins by opening valve 38. Then after closing the valve 36 and Opening the valve 34, the fine leak detection and finally, after opening the valve 33, the highly sensitive leak detection can be carried out.
- the schematic solution according to FIG. 1 also shows a flushing gas connection which leads via line 41 with valve 42 into line 37 and via which the leak detector can be flooded for the purpose of quickly removing troublesome test gas residues.
- the leak detector 1 is equipped with a second inlet 43. It is located on the side - not on the face like inlet 27 - and can be used optionally.
- the dashed line 45 in FIG. 1 indicates the housing 9 of the leak detector 1, as is shown in FIG. 2. It can be seen that the high-vacuum pump 2, the lines 28, 31, 32, 35, 37 and the valves 33, 34, 36, 38 are integrated in the housing 9.
- the dash-dotted lines 46, 47 in FIG. 1 are intended to indicate that the backing pump 6 and / or the purge gas valve 42 can also be integrated in the housing 9.
- the design of the high-vacuum pump 2 is essential. It comprises the insert 51, which is in the ready-to-use state in the associated opening 52 in the housing 9.
- the insert itself comprises essential components of the high-vacuum pump (stator, motor, shaft, rotor) designed as a turbomolecular pump, which are held together by a casing structure 53.
- the outer shape of the envelope structure 53 is adapted to the shape of the receiving opening 52 in the housing 9. In the embodiment shown in Figure 2, it is in essentially cylindrical.
- Outer steps 54, 55 ensure • a defined position in the operational state.
- Sealing rings 56 are provided for sealing the gap between the casing structure 53 and the housing 9 or opening 52.
- the casing structure 53 and also the stators 13, 25 of the high vacuum pump stages 7, 8 are equipped with openings 58, 59 and 61, 62, respectively.
- the cross-section of these openings which can extend for example over almost the entire circumference of the pump, and the design of the pump-active surfaces at the level of these openings determine the pump properties of the high-vacuum pump. If these are changed, it is only necessary at the leak detector according to the invention, the insert 51 trainees change '.
- valves 33, 34, 36, 38 Components of the leak detector according to the invention are the valves 33, 34, 36, 38, the closure components of which are integrated in the housing 9. It is expedient if the drives 63, 64, 66, 68 of these valves are also integrated in the housing 9. To accommodate these drives, the housing 9 has cavities 71 to 74. The housing 9 is expediently divisible in a plane that intersects these cavities, so that the valves — be it the closure components alone or these together with their drive — can be assembled in a simple manner. In addition, there must be holes for control lines if the valves are not operated wirelessly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10308420 | 2003-02-27 | ||
DE2003108420 DE10308420A1 (en) | 2003-02-27 | 2003-02-27 | Test gas leak detector |
PCT/EP2003/014589 WO2004077005A1 (en) | 2003-02-27 | 2003-12-19 | Test-gas leak detector |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1597556A1 true EP1597556A1 (en) | 2005-11-23 |
Family
ID=32841948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03789352A Ceased EP1597556A1 (en) | 2003-02-27 | 2003-12-19 | Test-gas leak detector |
Country Status (6)
Country | Link |
---|---|
US (1) | US7240536B2 (en) |
EP (1) | EP1597556A1 (en) |
JP (1) | JP4457018B2 (en) |
AU (1) | AU2003293948A1 (en) |
DE (1) | DE10308420A1 (en) |
WO (1) | WO2004077005A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0329839D0 (en) * | 2003-12-23 | 2004-01-28 | Boc Group Plc | Vacuum pump |
FR2883934B1 (en) * | 2005-04-05 | 2010-08-20 | Cit Alcatel | QUICK ENCLOSURE PUMPING WITH ENERGY LIMITATION |
DE602005007593D1 (en) * | 2005-06-30 | 2008-07-31 | Varian Spa | vacuum pump |
DE102005043494A1 (en) * | 2005-09-13 | 2007-03-15 | Inficon Gmbh | Leak detector with sniffer probe |
DE102005054638B4 (en) * | 2005-11-16 | 2013-09-26 | Oerlikon Leybold Vacuum Gmbh | Mobile leak detector |
DE102006047856A1 (en) * | 2006-10-10 | 2008-04-17 | Inficon Gmbh | Sniffing leak detector |
DE102007043382A1 (en) * | 2007-09-12 | 2009-03-19 | Inficon Gmbh | Sniffing leak detector |
GB2462804B (en) * | 2008-08-04 | 2013-01-23 | Edwards Ltd | Vacuum pump |
US8230722B1 (en) | 2010-03-16 | 2012-07-31 | Sandia Corporation | Residual gas analysis device |
FR2974412B1 (en) * | 2011-04-21 | 2013-06-07 | Adixen Vacuum Products | METHOD FOR CONTROLLING A LEAK DETECTOR AND LEAK DETECTOR |
DE102011107334B4 (en) * | 2011-07-14 | 2023-03-16 | Leybold Gmbh | Leak detection device and method for checking objects for leaks using a leak detection device |
DE202013003855U1 (en) * | 2013-04-25 | 2014-07-28 | Oerlikon Leybold Vacuum Gmbh | Examination device and multi-inlet vacuum pump |
DE102013218506A1 (en) * | 2013-09-16 | 2015-03-19 | Inficon Gmbh | Sniffer leak detector with multi-stage diaphragm pump |
DE102014101257A1 (en) * | 2014-02-03 | 2015-08-06 | Pfeiffer Vacuum Gmbh | vacuum pump |
DE102016210701A1 (en) * | 2016-06-15 | 2017-12-21 | Inficon Gmbh | Mass spectrometric leak detector with turbomolecular pump and booster pump on common shaft |
JP6533341B2 (en) * | 2016-06-30 | 2019-06-19 | 株式会社キッツ | Pressure resistance inspection system for valve, inspection method therefor and hydrogen gas detection unit |
FR3070489B1 (en) * | 2017-08-29 | 2020-10-23 | Pfeiffer Vacuum | LEAK DETECTOR AND LEAK DETECTION PROCESS FOR THE TIGHTNESS CHECK OF OBJECTS TO BE TESTED |
FR3072774B1 (en) * | 2017-10-19 | 2019-11-15 | Pfeiffer Vacuum | LEAK DETECTOR FOR CONTROLLING THE SEALING OF AN OBJECT TO BE TESTED |
DE102020132896A1 (en) | 2020-12-10 | 2022-06-15 | Inficon Gmbh | Device for mass spectrometric leak detection with three-stage turbomolecular pump and booster pump |
CN115219112A (en) * | 2022-06-16 | 2022-10-21 | 北京中科科仪股份有限公司 | Molecular pump and mass spectrometer leak detector |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3124205A1 (en) | 1981-06-19 | 1982-12-30 | Balzers Hochvakuum Gmbh, 6200 Wiesbaden | Leak-locating system |
DE58907244D1 (en) * | 1989-07-20 | 1994-04-21 | Leybold Ag | Friction pump with bell-shaped rotor. |
US5733104A (en) | 1992-12-24 | 1998-03-31 | Balzers-Pfeiffer Gmbh | Vacuum pump system |
EP0603694A1 (en) * | 1992-12-24 | 1994-06-29 | BALZERS-PFEIFFER GmbH | Vacuum system |
JP2655315B2 (en) | 1994-06-29 | 1997-09-17 | 日本真空技術株式会社 | Leak detection device using compound molecular pump |
US5634778A (en) * | 1994-11-30 | 1997-06-03 | Hein-Werner Corporation | Remote control pump |
JP4520636B2 (en) * | 1998-05-26 | 2010-08-11 | ライボルト ヴァークウム ゲゼルシャフト ミット ベシュレンクテル ハフツング | Friction vacuum pump with chassis, rotor and casing, and apparatus with this type of friction vacuum pump |
FR2784184B1 (en) * | 1998-10-01 | 2000-12-15 | Cit Alcatel | COMPACT LEAK DETECTOR |
DE29916531U1 (en) * | 1999-09-20 | 2001-02-08 | Volkmann, Thilo, 59514 Welver | Ejector |
DE10055057A1 (en) * | 2000-11-07 | 2002-05-08 | Pfeiffer Vacuum Gmbh | Leak detector pump has high vacuum pump, gas analyzer, test object connector, gas outlet opening, gas inlet opening, valve bodies and gas connections in or forming parts of housing |
-
2003
- 2003-02-27 DE DE2003108420 patent/DE10308420A1/en not_active Ceased
- 2003-12-19 EP EP03789352A patent/EP1597556A1/en not_active Ceased
- 2003-12-19 WO PCT/EP2003/014589 patent/WO2004077005A1/en active Application Filing
- 2003-12-19 AU AU2003293948A patent/AU2003293948A1/en not_active Abandoned
- 2003-12-19 JP JP2004568669A patent/JP4457018B2/en not_active Expired - Lifetime
- 2003-12-19 US US10/546,666 patent/US7240536B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004077005A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7240536B2 (en) | 2007-07-10 |
WO2004077005A1 (en) | 2004-09-10 |
US20060169028A1 (en) | 2006-08-03 |
AU2003293948A1 (en) | 2004-09-17 |
JP2006514288A (en) | 2006-04-27 |
JP4457018B2 (en) | 2010-04-28 |
DE10308420A1 (en) | 2004-09-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |
|
17P | Request for examination filed |
Effective date: 20050617 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB LI |
|
17Q | First examination report despatched |
Effective date: 20080821 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OERLIKON LEYBOLD VACUUM GMBH |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20140720 |