CN203561616U - Non-normal-pressure gas sampling device - Google Patents
Non-normal-pressure gas sampling device Download PDFInfo
- Publication number
- CN203561616U CN203561616U CN201320656249.9U CN201320656249U CN203561616U CN 203561616 U CN203561616 U CN 203561616U CN 201320656249 U CN201320656249 U CN 201320656249U CN 203561616 U CN203561616 U CN 203561616U
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- sealing
- sealing adaptor
- hexagonal nut
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Abstract
The utility model belongs to the technical field of design and manufacturing of a gas chromatography device and particularly relates to a non-normal-pressure gas sampling device. The non-normal-pressure gas sampling device comprises a hexagonal nut, a sealed rotary union, a sealed isolation cushion and a sampling connector, wherein an outer thread is arranged on the front part of the sealed rotary union and a baffling platform is arranged on the rear part of the sealed rotary union; the inner wall of the hexagonal nut is provided with an inner thread and the inner diameter of a through hole in the rear end of the hexagonal nut is greater than the outer diameter of the baffling platform; the hole diameter of a through hole in the front end is greater than the diameter of a column body of the sealed rotary union and is less than the outer diameter of the baffling platform; the sampling connector is composed of large and small cylinders which are provided with same concentric through holes and are fixedly connected; convex edges are uniformly and transversely distributed on the outer surface of the large cylinder; the sealed isolation cushion is arranged between the small cylinder and the sealed rotary union. The non-normal-pressure gas sampling device can be used for sampling high-pressure and negative-pressure gas samples; in a high-pressure gas sampling process, a decompression valve is not needed and the waste of gas is reduced; when negative-pressure gas is sampled, an original sample is not damaged; non-normal-pressure gas is converted into normal pressure so as to be good for gas chromatography.
Description
Technical field
The utility model belongs to design and the manufacturing technology field of gas chromatographic analysis device, particularly relates to a kind of non-atmosphere gas sampler.
Background technology
At present, when gas chromatographic analysis adopts external standard method quantitative, need the calibrating gas production standard curve of a plurality of concentration point.Calibrating gas is generally stored in high pressure vessel, after need reducing pressure by reduction valve, is discharged in air bag or syringe.There is dead volume in reduction valve and air bag, need to clean with calibrating gas, and the wastage of calibrating gas is large.When gaseous sample to be analyzed is negative pressure state, before sampling, need to adopt chromatogram carrier gas to dilute supercharging.Dilution cannot guarantee that gaseous sample mixes in pressurization, and the sneaking into of ambient atmos, and has destroyed primary sample.
Summary of the invention
Technical problem to be solved in the utility model is: designed a kind of gas sampling device of depressing very much, solved the difficult accurately problem of sampling of high pressure and negative-pressure gas.
It is as follows that the utility model solves the problems of the technologies described above adopted technical scheme: non-atmosphere gas sampler, comprise hexagonal nut, sealing adaptor head, sealing dottle pin and sample connection, the described sealing adaptor head integral body with through hole is cylindrical, in sealing adaptor head front portion, external thread is being set, the middle part of sealing adaptor head is fixed is arranging columniform gear platform, the external diameter of gear platform is greater than the diameter of sealing adaptor headpin body, and sealing adaptor back of head arranges the dome of smooth sphere; Described hexagonal nut has the cylindrical cavity of hollow, internal thread is being set on cavity inner wall, hexagonal nut front/rear end is arranging has phase concentric but the different through hole of diameter, hexagonal nut rear end through hole internal diameter is greater than the external diameter of sealing adaptor first speed platform, and the diameter that hexagonal nut front end through-hole aperture is greater than sealing adaptor headpin body is less than the external diameter of sealing adaptor first speed platform; Described sample connection is that the large small cylinder fixing structure with phase concentric becomes, large cylinder front and back end is arranging respectively has phase concentric but the different through hole of diameter, the horizontal uniform lug, nib that arranging of large cylinder outside surface, the through-hole aperture of large cylinder front end is less than the through-hole aperture of rear end, the through hole of large cylinder rear end and the through hole of small cylinder etc. are large, and the internal thread matching with the anterior external thread of sealing adaptor head is all being set on the through-hole wall of large cylinder rear end and small cylinder; The diameter of the solid sealing dottle pin of cylindrical of plastic material equals the diameter of sealing adaptor headpin body but is greater than the diameter of large cylinder front end through hole, and sealing dottle pin is placed between large cylinder front end inner face and sealing adaptor head.
In practice, this device mainly consists of sealing adaptor head, hexagonal nut, sealing dottle pin, sample connection.Hexagonal nut can design according to the screw thread of the gas-taking end of splendid attire gas device to be measured.Sealing adaptor head, under the effect of hexagonal nut, is realized butt-end packing with gas-taking end.Sealing dottle pin is commercial gas chromatographic sample introduction mouth dottle pin, and centripetal distortion under the effect of sealing adaptor head and sample connection is guaranteed still to seal after syringe needle repeatedly plugs.Syringe is used for sampling, and makes non-atmosphere gas be converted to atmosphere gas.This sampler is simple in structure, dead volume is little, easy to operate, good portability.
The beneficial effects of the utility model: the utility model can, to high pressure and the sampling of negative-pressure gas sample, not need reduction valve, and reduce the waste of gas in gases at high pressure sampling process; During negative-pressure gas sampling, do not destroy primary sample; And non-atmosphere gas is converted to normal pressure, be beneficial to gas chromatographic analysis.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is main TV structure schematic diagram of the present utility model.
Embodiment
Non-atmosphere gas sampler, as shown in Figure 1, comprise hexagonal nut 1, sealing adaptor head 2, sealing dottle pin 3 and sample connection 4, described sealing adaptor head 2 integral body with through hole are cylindrical, in sealing adaptor head 2 front portions, external thread is being set, the rear portion of sealing adaptor head 2 is fixed is arranging columniform gear platform, and the external diameter of gear platform is greater than the diameter of sealing adaptor head 2 cylinders; Described hexagonal nut 1 has the cylindrical cavity of hollow, internal thread is being set on cavity inner wall, hexagonal nut 1 front/rear end is arranging has phase concentric but the different through hole of diameter, hexagonal nut 1 rear end through hole internal diameter is greater than the external diameter of sealing adaptor first speed platform, and the diameter that hexagonal nut 1 front end through-hole aperture is greater than sealing adaptor head 2 cylinders is less than the external diameter that sealing adaptor head 2 keeps off platforms; Described sample connection 4 becomes for having the large small cylinder fixing structure of phase concentric, large cylinder front and back end is arranging respectively has phase concentric but the different through hole of diameter, the horizontal uniform lug, nib that arranging of large cylinder outside surface, the through-hole aperture of large cylinder front end is less than the through-hole aperture of rear end, the through hole of large cylinder rear end and the through hole of small cylinder etc. are large, and the internal thread matching with the anterior external thread of sealing adaptor head 2 is all being set on the through-hole wall of large cylinder rear end and small cylinder; The diameter of the solid sealing dottle pin 3 of cylindrical of plastic material equals the diameter of sealing adaptor headpin body but is greater than the diameter of large cylinder front end through hole, and sealing dottle pin 3 is placed between large cylinder front end inner face and sealing adaptor head 2.
In practical operation, during gases at high pressure sampling, connect successively sealing adaptor head, hexagonal nut, sealing dottle pin and sample connection (lug, nib on sample connection large cylinder surface is more easily tightened with hand in operation), with syringe, get rid of after the gas in its space dead volume, open high-pressure gas cylinder valve, then close immediately, syringe is inserted to sample tap sampling, by syringe, regulate the pressure of gathered gaseous sample to environmental pressure.During negative-pressure gas sampling, the gas-taking end, sealing adaptor head, hexagonal nut, sealing dottle pin and the sample connection that connect successively splendid attire gas device to be measured, with syringe, get rid of the gas in its space dead volume, then open the valve of gas device to be measured, adopt after syringe collected specimens, valve-off, is adjusted to environmental pressure by syringe by the pressure of gathered gaseous sample.There is the gas of certain dead volume in this sampler, should adopt syringe to discharge equally before sampling.Sealing dottle pin is general uses 50 left and right to need to change, and suggestion adopts soap lye leak detection after repeatedly using.
Claims (1)
1. non-atmosphere gas sampler, comprise hexagonal nut, sealing adaptor head, sealing dottle pin and sample connection, it is characterized in that: the described sealing adaptor head integral body with through hole is cylindrical, in sealing adaptor head front portion, external thread is being set, the middle part of sealing adaptor head is fixed is arranging columniform gear platform, the external diameter of gear platform is greater than the diameter of sealing adaptor headpin body, and sealing adaptor back of head arranges the dome of smooth sphere; Described hexagonal nut has the cylindrical cavity of hollow, internal thread is being set on cavity inner wall, hexagonal nut front/rear end is arranging has phase concentric but the different through hole of diameter, hexagonal nut rear end through hole internal diameter is greater than the external diameter of sealing adaptor first speed platform, and the diameter that hexagonal nut front end through-hole aperture is greater than sealing adaptor headpin body is less than the external diameter of sealing adaptor first speed platform; Described sample connection is that the large small cylinder fixing structure with phase concentric becomes, large cylinder front and back end is arranging respectively has phase concentric but the different through hole of diameter, the horizontal uniform lug, nib that arranging of large cylinder outside surface, the through-hole aperture of large cylinder front end is less than the through-hole aperture of rear end, the through hole of large cylinder rear end and the through hole of small cylinder etc. are large, and the internal thread matching with the anterior external thread of sealing adaptor head is all being set on the through-hole wall of large cylinder rear end and small cylinder; The diameter of the solid sealing dottle pin of cylindrical of plastic material equals the diameter of sealing adaptor headpin body but is greater than the diameter of large cylinder front end through hole, and sealing dottle pin is placed between large cylinder front end inner face and sealing adaptor head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656249.9U CN203561616U (en) | 2013-10-24 | 2013-10-24 | Non-normal-pressure gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656249.9U CN203561616U (en) | 2013-10-24 | 2013-10-24 | Non-normal-pressure gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561616U true CN203561616U (en) | 2014-04-23 |
Family
ID=50511330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320656249.9U Expired - Fee Related CN203561616U (en) | 2013-10-24 | 2013-10-24 | Non-normal-pressure gas sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561616U (en) |
-
2013
- 2013-10-24 CN CN201320656249.9U patent/CN203561616U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20151024 |
|
| EXPY | Termination of patent right or utility model |