CN112557488A - Integrated molecular beam sampling interface - Google Patents
Integrated molecular beam sampling interface Download PDFInfo
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- CN112557488A CN112557488A CN202011425804.8A CN202011425804A CN112557488A CN 112557488 A CN112557488 A CN 112557488A CN 202011425804 A CN202011425804 A CN 202011425804A CN 112557488 A CN112557488 A CN 112557488A
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- assembling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0422—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components for gaseous samples
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Abstract
The invention relates to an integrated molecular beam sampling interface which comprises a sampling cone, a collimating strainer and a mounting base, wherein the mounting base comprises a first assembling part, a second assembling part and a lateral flow pore channel, the first assembling part and the second assembling part are oppositely arranged along an axial direction, the lateral flow pore channel is positioned between the first assembling part and the second assembling part, the first assembling part and the second assembling part are rigidly connected into a whole, a first assembling groove and a second assembling groove are respectively arranged on the first assembling part and the second assembling part, the sampling cone and the collimating strainer are respectively and fixedly arranged in the first assembling groove and the second assembling groove, and a first sampling port of the sampling cone and a second sampling port of the collimating strainer are positioned on the same axis, so that the problem that the existing molecular beam sampling interface needs to be collimated during each installation is solved.
Description
Technical Field
The invention relates to the technical field of mass spectrometer analysis equipment, in particular to an integrated molecular beam sampling interface.
Background
The use of molecular beams dates back to 1934 (trans. faraday soc.,30(1934), 182-. The mounting of molecular beam interfaces is disclosed in (proc.combust.inst.,29(2002),2627-2633), (rev.sci.instrum.,76(2005),094102), (rev.sci.instrum.,77(2006),084101) and the like.
A conventional molecular-beam mass spectrometry (MBMS) molecular-beam sampling interface generally includes a sampling cone and a collimating funnel. The sampling cone and the collimating colander are generally conical. Gas molecules in a higher pressure range enter the differential section through the small holes of the sampling cone to form divergent airflow, and then enter the low-pressure section through the collimating colander to form a molecular beam. The molecular beam sampling interface can effectively reduce the collision among molecules and is particularly suitable for obtaining active components in reaction gas. At present sample awl and collimation strainer are installed on two different metal sheets, all need adjust the same axis with the help of laser or other modes with sample awl and punctual strainer during installation at every turn, and this kind of mounting means wastes time and energy, and installation repeatability is not high to there is the deviation slightly during the installation, will lead to instrument sensitivity to reduce.
Disclosure of Invention
The invention aims to provide an integrated molecular beam sampling interface to solve the problem that the existing molecular beam sampling interface needs to be collimated every time of installation.
The specific scheme is as follows:
the utility model provides an integral type molecular beam sample interface, includes sample awl, collimation strainer and mounting base, mounting base includes along the relative first assembly portion, the second assembly portion that sets up of an axial to and be located axial channel and the side direction circulation pore between first assembly portion, the second assembly portion, first assembly portion and second assembly portion rigid connection become one, first assembly groove and the second assembly groove that sets up with axial channel intercommunication have respectively on first assembly portion, the second assembly portion, sample awl, collimation strainer fixed mounting respectively in first assembly groove and second assembly groove, and the first sample connection of sample awl and the second sample connection of collimation strainer are located the same axis.
In an embodiment, the first assembling portion and the second assembling portion are rigidly connected through a plurality of fixing columns, an area surrounded by the plurality of fixing columns forms the axial channel, and a gap between two adjacent fixing columns forms the lateral flow channel.
In one embodiment, the fixing posts are cylindrical fixing posts.
In an embodiment, a side wall connecting the first assembling portion and the second assembling portion is provided between the first assembling portion and the second assembling portion, the side wall is integrally formed with the first assembling portion and the second assembling portion, an area maintained by the side wall forms the axial channel, and the side wall is hollowed out to form the lateral flow duct.
In one embodiment, the first assembling portion and the second assembling portion are respectively provided with a first sealing ring and a second sealing ring which are in sealing contact with the mounting hole of the mass spectrum frame.
In an embodiment, the first assembling portion and the second assembling portion are respectively provided with a groove on the surface corresponding to the hole wall of the mounting hole, the groove being matched with the first sealing ring and the second sealing ring, and the first sealing ring and the second sealing ring are respectively mounted in the corresponding grooves.
In one embodiment, the sampling cone has a first peripheral wall in a conical shape, a first sampling port located at the center of the top of the first peripheral wall, and a first flange surface located at the bottom edge of the first peripheral wall, and the first flange surface is fixed in the first assembling groove; the collimating colander is provided with a conical second peripheral wall, a second sampling port positioned at the center of the top of the second peripheral wall and a second flange surface positioned at the bottom edge of the second peripheral wall, and the second flange surface is fixed in the second assembling groove.
In one embodiment, the first flange surface is fixedly connected with the first assembling groove in a flange mode, and the second flange surface is fixedly connected with the second assembling groove in a flange mode.
In an embodiment, the first flange surface and the second flange surface are both circular flange surfaces, and the first assembling groove and the second assembling groove are circular assembling grooves respectively matched with the first flange surface and the second flange surface.
In one embodiment, the second peripheral wall of the collimating strainer has a smaller taper relative to the first peripheral wall of the sampling cone, and a front portion of the second peripheral wall extends into a space surrounded by the first peripheral wall.
Compared with the prior art, the integrated molecular beam sampling interface provided by the invention has the following advantages: in the integrated molecular beam sampling interface provided by the invention, the sampling cone and the collimation strainer are arranged on the same mounting base, and can be integrally dismounted during dismounting, so that the calibration state of the sampling cone and the collimation strainer is not influenced, and subsequent repeated dismounting and calibration are not needed after one-time mounting and collimation.
Drawings
Fig. 1 shows a schematic diagram illustrating an integrated molecular beam sampling interface in example 1.
Fig. 2 shows a schematic view of a sampling cone in example 1.
Fig. 3 shows a schematic view of a collimating scoop in example 1.
Fig. 4 shows a schematic view of the mounting base in embodiment 1.
Fig. 5 is a schematic cross-sectional view showing the integrated molecular beam sampling interface of example 1 mounted on a mass spectrometer frame in example 1.
Fig. 6 shows a schematic view of the integrated molecular beam sampling interface of example 1 mounted on a mass spectrometer frame in example 1.
Fig. 7 shows a schematic view of the mounting base in embodiment 2.
Description of the drawings the reference numerals indicate:
1. sampling cone; 10. a first peripheral wall; 11. a first sampling port; 12. a first flange face;
2. collimating the perforated ladle; 20. a second peripheral wall; 21. a second sampling port; 22. a second flange face;
3. mounting a base; 31. a first fitting portion; 32. a second fitting portion; 33. a lateral flow channel; 34. fixing a column; 35. a side wall; 36. an axial channel; 310. a first fitting groove; 311. a first seal ring; 320. a second assembly groove; 321. a second seal ring;
4. a mass spectrometry framework; 40. mounting holes;
6. a reaction chamber;
7. entering a difference segment;
8. an ionization chamber;
9. and (4) molecular beams.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
Example 1
The embodiment provides an integral type molecular beam sampling interface, including sample awl 1, collimation strainer 2 and mounting base 3.
Therein, referring to fig. 1 to 4, the sampling cone 1 has a first peripheral wall 10 having a conical shape, a first sampling port 11 located at the top center of the first peripheral wall 10, and a first flange face 12 located at the bottom edge of the first peripheral wall 10.
The collimating scoop 2 has a second peripheral wall 20 in the shape of a cone, a second sampling port 21 located at the top center of the second peripheral wall 20, and a second flange face 22 located at the bottom edge of the second peripheral wall 20.
The mounting base 3 is an integral structure and comprises a first assembling portion 31 and a second assembling portion 32 which are oppositely arranged along an axial direction, an axial channel 36 and a lateral flow hole channel 33 which are arranged between the first assembling portion 31 and the second assembling portion 32, wherein the first assembling portion 31 is provided with a first assembling groove 310 which is matched with the first flange surface 12 of the sampling cone 1, and the second assembling portion 32 is provided with a second assembling groove 320 which is matched with the second flange surface 22 of the collimating strainer 2. The first flange 12 of the sampling cone 1 is fixed in the first assembling groove 310, so that the sampling cone 1 is fixedly installed on the installation base 3, the second flange 22 of the collimating strainer 2 is fixed in the second assembling groove 320, so that the collimating strainer 2 is fixedly installed on the installation base 3, and the first sampling port 11 of the sampling cone 1 and the second sampling port 21 of the collimating strainer 2 are located on the same axis.
Fig. 5 shows a cross-sectional view of the integrated molecular beam sampling port after assembly, in which a sampling cone 1 and a collimating strainer 2 are respectively fixed in a first assembling groove 310 and a second assembling groove 320 of a mounting base 3, and a first sampling port 11 and a second sampling port 21 of the sampling cone 1 and the collimating strainer 2 are located in the same axial direction. Because the second peripheral wall 20 of the collimating strainer 2 has a smaller taper relative to the first peripheral wall 10 of the sampling cone 1, and the front portion of the second peripheral wall 20 extends into the space surrounded by the first peripheral wall 10, a differential passage communicating with the lateral flow channel 33 is formed between the inner wall of the first peripheral wall 10 and the outer wall of the second peripheral wall 20, while the gas molecules in the higher pressure range in the reaction chamber 6 enter the differential passage 7 through the first sampling port 11 of the sampling cone 1 to form a divergent gas flow, a part of the gas flow passes through the collimating strainer and enters the ionization chamber 8 in the low pressure section to form a molecular beam 9, and the rest of the gas flow is discharged from the lateral flow channel 33. In the integral type molecular beam sampling interface that this embodiment provided, sample awl and collimation strainer are installed on same mounting base, can wholly pull down during the dismantlement, can not influence the calibration state of sample awl and collimation strainer, therefore need not follow-up dismouting calibration repeatedly after once the installation collimation.
In the present embodiment, referring to fig. 1 and 4, the first mounting portion 31 of the mounting base 3 is a first fixing plate having a circular plate shape, and the second mounting portion 32 of the mounting base 3 is a second fixing plate having a circular plate shape. Since the first and second fitting portions 31 and 32 have a circular plate-shaped structure, the corresponding first and second fitting grooves 310 and 320 are substantially concentric with the first and second fitting portions 31 and 32.
The first fixing plate and the second fixing plate are fixedly connected through a plurality of fixing columns 34, an area surrounded by the plurality of fixing columns 34 forms the axis channel 36, and a gap between two adjacent fixing columns 34 forms the lateral flow pore channel 33. Among them, the fixing post 34 is preferably a cylindrical fixing post.
As a preferred embodiment in this embodiment, referring to fig. 5 and 6, the first assembling portion 31 and the second assembling portion 32 are respectively provided with a first sealing ring 311 and a second sealing ring 321 which are in sealing contact with the mounting hole 40 of the mass spectrum frame 4, so that after the integrated molecular beam sampling interface is mounted on the mass spectrum frame 4, the sealing of the mounting position can be ensured, and the occurrence of the gas leakage problem can be prevented.
In this embodiment, the first and second assembling portions 31 and 32 have grooves formed on their surfaces corresponding to the hole walls of the mounting hole 40, the first and second sealing rings 311 and 321 are respectively fitted into the grooves, and when the integrated molecular beam sampling interface is mounted in the mounting hole 40 of the mass spectrometry frame 4, the first and second sealing rings 311 and 321 are in sealing contact with the hole walls of the mounting hole 40 to achieve sealing.
As another preferred embodiment in this embodiment, the first flange surface 12 and the second flange surface 22 are both circular flange surfaces, the first assembling groove 310 and the second assembling groove 320 are circular assembling grooves respectively matched with the first flange surface 12 and the second flange surface 22, and the first assembling groove 310 and the second assembling groove 320 are coaxially arranged, wherein the inner diameter of the first assembling groove 310 is slightly larger than the outer diameter of the first flange surface 12, and the inner diameter of the second assembling groove 320 is slightly larger than the outer diameter of the second flange surface 22, so as to facilitate the alignment of the sampling cone 1 and the aligning strainer 2 during the installation process.
Example 2
The present embodiment also provides an integrated molecular beam sampling interface, the structure of which is substantially the same as that of the integrated molecular beam sampling interface provided in embodiment 1, and the difference is that the structure of the mounting base 3 is slightly different, the mounting base 3 in this embodiment includes a first mounting portion 31, a second mounting portion 32, and an axial passage 36 and a lateral flow channel 33 between the first mounting portion 31 and the second mounting portion 32, which are oppositely disposed along an axial direction, the first mounting portion 31 has a first mounting groove 310 disposed to match with the first flange surface 12 of the sampling cone 1, and the second mounting portion 32 has a second mounting groove 320 disposed to match with the second flange surface 22 of the collimating funnel 2, as in embodiment 1.
In embodiment 1, the first assembling portion 31 and the second assembling portion 32 are fixedly connected by a plurality of fixing posts 34, while the side wall 35 fixedly connecting the first assembling portion 31 and the second assembling portion 32 in this embodiment is integrally formed with the first assembling portion 31 and the second assembling portion 32, the area enclosed by the side wall 35 forms the axial channel 36, and the side wall 35 is hollowed out to form the lateral flow duct 33. Compared with the mounting base 3 in the embodiment 1, the mounting base 3 in the embodiment is integrally formed, so that errors caused by the assembly of the fixing columns 34 can be reduced, and the assembly precision of the mounting base 3 can be further improved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An integral type molecular beam sampling interface which characterized in that: including sample awl, collimation strainer and mounting base, mounting base includes along the relative first assembly portion, the second assembly portion that sets up of an axial to and be located axial passageway and the side direction circulation pore between first assembly portion, the second assembly portion, first assembly portion and second assembly portion rigid connection become one, first assembly groove and second assembly groove that set up with axial passageway intercommunication have respectively in first assembly portion, the second assembly portion, sample awl, collimation strainer fixed mounting respectively are in first assembly groove and second assembly groove, and the first sample connection of sample awl and the second sample connection of collimation strainer are located same axis.
2. The integrated molecular beam sampling interface of claim 1, wherein: rigid connection between the first assembling portion and the second assembling portion is achieved through a plurality of fixing columns, the axial channel is formed in an area surrounded by the fixing columns, and the lateral circulation pore channel is formed in a gap between every two adjacent fixing columns.
3. The integrated molecular beam sampling interface of claim 2, wherein: the fixing column is a cylindrical fixing column.
4. The integrated molecular beam sampling interface of claim 1, wherein: the side wall is connected with the first assembling portion and the second assembling portion, the side wall is integrally formed with the first assembling portion and the second assembling portion, the axial channel is formed in an area maintained by the side wall, and the side wall is hollowed out to form the lateral circulation pore channel.
5. The integrated molecular beam sampling interface of claim 1, wherein: and the first assembling part and the second assembling part are respectively provided with a first sealing ring and a second sealing ring which are in sealing contact with the mounting hole of the mass spectrum frame.
6. The integrated molecular beam sampling interface of claim 5, wherein: the first assembling portion and the second assembling portion are respectively provided with a groove matched with the first sealing ring and the second sealing ring on the surfaces corresponding to the hole walls of the mounting holes, and the first sealing ring and the second sealing ring are respectively arranged in the corresponding grooves.
7. The integrated molecular beam sampling interface of claim 1, wherein: the sampling cone is provided with a conical first peripheral wall, a first sampling port positioned at the center of the top of the first peripheral wall and a first flange surface positioned at the edge of the bottom of the first peripheral wall, and the first flange surface is fixed in the first assembling groove; the collimating colander is provided with a conical second peripheral wall, a second sampling port positioned at the center of the top of the second peripheral wall and a second flange surface positioned at the bottom edge of the second peripheral wall, and the second flange surface is fixed in the second assembling groove.
8. The integrated molecular beam sampling interface of claim 7, wherein: the first flange face and the first assembling groove are fixedly connected through flanges, and the second flange face and the second assembling groove are fixedly connected through flanges.
9. The integrated molecular beam sampling interface of claim 7, wherein: the first flange face and the second flange face are both circular flange faces, and the first assembling groove and the second assembling groove are circular assembling grooves which are respectively matched with the first flange face and the second flange face.
10. The integrated molecular beam sampling interface of claim 7, wherein: the second peripheral wall of the collimating colander has a smaller taper relative to the first peripheral wall of the sampling cone, and the front part of the second peripheral wall extends into a space surrounded by the first peripheral wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425804.8A CN112557488A (en) | 2020-12-09 | 2020-12-09 | Integrated molecular beam sampling interface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011425804.8A CN112557488A (en) | 2020-12-09 | 2020-12-09 | Integrated molecular beam sampling interface |
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| CN112557488A true CN112557488A (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340972A (en) * | 2021-05-06 | 2021-09-03 | 清华大学 | Ultrafast time resolution mass spectrum diagnostic system based on rapid compressor |
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| CN107910241A (en) * | 2017-11-14 | 2018-04-13 | 大连民族大学 | A kind of mass spectrometer of laser welding plasma plumage brightness particulate subconstiuent |
| CN109585255A (en) * | 2018-12-17 | 2019-04-05 | 深圳至秦仪器有限公司 | Sealing device and sample injection apparatus for mass spectrographs |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08115702A (en) * | 1994-10-17 | 1996-05-07 | Kurita Water Ind Ltd | Nozzle and skimmer for high frequency inductive coupling plasma mass spectrograph |
| US20080230690A1 (en) * | 2007-03-20 | 2008-09-25 | Nippon Mining & Metals Co., Ltd. | Method for analyzing minute amounts of Pd, Rh and Ru, and high-frequency plasma mass spectroscope used for same |
| CN107068534A (en) * | 2011-12-12 | 2017-08-18 | 塞莫费雪科学（不来梅）有限公司 | Mass spectrometer vacuum interface method and equipment |
| JP3182750U (en) * | 2013-01-28 | 2013-04-11 | 株式会社島津製作所 | Jig set for mass spectrometer |
| CN104637773A (en) * | 2015-02-16 | 2015-05-20 | 江苏天瑞仪器股份有限公司 | Mass spectrometer primary vacuum structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340972A (en) * | 2021-05-06 | 2021-09-03 | 清华大学 | Ultrafast time resolution mass spectrum diagnostic system based on rapid compressor |
| CN113340972B (en) * | 2021-05-06 | 2023-11-21 | 清华大学 | Ultrafast time-resolved mass spectrum diagnosis system based on fast compressor |
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Application publication date: 20210326 |