CN201034986Y - Gasproof sample introduction needle and hitch thereof - Google Patents
Gasproof sample introduction needle and hitch thereof Download PDFInfo
- Publication number
- CN201034986Y CN201034986Y CNU2007200785962U CN200720078596U CN201034986Y CN 201034986 Y CN201034986 Y CN 201034986Y CN U2007200785962 U CNU2007200785962 U CN U2007200785962U CN 200720078596 U CN200720078596 U CN 200720078596U CN 201034986 Y CN201034986 Y CN 201034986Y
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- China
- Prior art keywords
- sealing
- sample introduction
- piston
- needle
- syringe
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- Expired - Fee Related
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Abstract
The utility model relates to an airtight injection needle and a coupling device, including an airtight injection needle and a coupling device. One end of a syringe is fixedly connected with a location sealing ring, and the other end is fixedly connected with a needle tube; a piston and the location sealing ring are connected through clearance fit; a piston head sleeve is fixedly connected with the piston and is arranged inside the syringe; a sealing offsetting spring pocket is connected with the syringe through a thread; one end of the gasket pocket of the needle tube is positioned in the sealing offsetting spring pocket and the other end is connected with the screw cap through a thread; one end of the sealing offsetting spring stands against the syringe and the other end against the gasket pocket of the needle tube; the needle tube gasket is positioned inside the gasket pocket and is compacted by the screw cap. The utility model, which needs simple gas only a plurality of milliliters, is accurate in measurement, high in reproducibility, and suitable for gas chromatographic instrument manual injection for analyzing trace components in protective gas in the aspects of electronic engineering, chemical engineering, etc., in particular for the detection of a component like trace oxygen, trace water, trace carbon monoxide, etc. in a protective gas such as nitrogen, argon and so on.
Description
Technical field
The utility model relates to a kind of sampling device, relates in particular to a kind of airtight sample introduction needle and hookup thereof.
Background technology
A lot of easy and airborne oxygen of material, water, oxides of nitrogen etc. react and go bad in electronics industry and chemical industry, usually these materials are stored in the closed container, and adopt high pure nitrogen, argon gas etc. as protective gas.Sometimes calculate the rotten situation of material to be protected in order to detect the material to be protected variable quantity that the protective gas in the closed container is analyzed impurity composition wherein such as oxygen, water, oxides of nitrogen as detected gas in the mass change of closed container often needs to extract.Because these impurity compositions content in air is many, usually adopt air pump that detected gas is directly connect with chromatograph mutually by the capillary stainless-steel tube for fear of the interference of air, purge chromatographic pipeline continuously with a large amount of detected gas then, guarantee the accuracy and the repeatability that detect.Above-mentioned method has seriously been disturbed in the closed container atmosphere of gas to make and has been analyzed become unreliable when sometimes needing to study the reaction rule of these materials to be protected under protective condition.
The utility model content
The purpose of this utility model is the deficiency at the prior art scheme, provides a kind of sample demand little sampling, sampling device.Airtight sample introduction needle of the present utility model has location sealing ring and piston to form the awl sealing and is compressed by piston reset spring, can guarantee that detected gas is not disturbed by air in the needle tubing.
The maximum of location of the present utility model sealing ring energy limited piston forms and makes each sample size be consistent, and guarantees the reliability of analyzing.
The technical scheme that the utility model provides is: the utility model mainly comprises airtight sample introduction needle and hookup, wherein airtight sample introduction needle mainly is made up of syringe, piston, piston headgear, location sealing ring, piston reset spring, needle tubing, sealing reseting spring sleeve, sealing back-moving spring, needle tubing sealing gasket, needle tubing sealing cushion cover, nut, and hookup is made up of junction pipe, sweep gas induction pipe, sweep gas outlet.Syringe one end connects firmly with the location sealing ring, and the other end and the needle tubing of syringe connect firmly, piston and to locate between the sealing ring be clearance fit, and piston headgear and piston connect firmly, and piston head is set in syringe inside, and the push-and-pull piston can drive piston head and be enclosed within the syringe and reciprocatingly slide.
Piston reset spring one end props up above-mentioned piston, the other end props up above-mentioned location sealing ring, it is consistent with the conical surface tapering of above-mentioned piston rod portion that above-mentioned location sealing ring simultaneously is the conical surface, and the conical surface of location sealing ring and the conical surface of piston can reach the purpose of sealing when compressing.
Sealing reseting spring sleeve and syringe spiral marking connection, needle tubing sealing cushion cover one end is positioned at the sealing reseting spring sleeve, the other end and nut spiral marking connection, and sealing back-moving spring one end props up syringe, the other end props up needle tubing sealing cushion cover, and the needle tubing sealing gasket is positioned at needle tubing sealing cushion cover by nut compressing.
Above-mentioned needle tubing is hollow kapillary, and a side and an end that connects with above-mentioned syringe respectively have a hole.
Above-mentioned sealing back-moving spring can promote above-mentioned needle tubing sealing shroud and drive hole that above-mentioned needle tubing sealing gasket makes above-mentioned needle tubing side to be positioned at above-mentioned needle tubing sealing gasket sealed.
An end and airtight sample introduction needle spiral marking connection when above-mentioned hookup is sampled, the other end is with the closed container spiral marking connection of detected gas.One end and airtight sample introduction needle spiral marking connection during above-mentioned hookup sample introduction, the other end connects by the carrier gas and the chromatographic column of threeway and gas chromatograph.
Above-mentioned sweep gas induction pipe connects firmly with junction pipe, and above-mentioned sweep gas outlet connects firmly with junction pipe.
The material of above-mentioned syringe can be glass or stainless steel.
The material of above-mentioned piston headgear is a teflon.
Above-mentioned gasket material is a silicon rubber.
Description of drawings
Fig. 1 is airtight sample introduction needle sectional structural map.
Fig. 2 is the hookup sectional structural map.
Fig. 3 is airtight sample introduction needle and hookup and closed container interface chart.
Fig. 4 is the interface chart of airtight sample introduction needle and hookup and gas chromatograph.
Fig. 5 is the zirconia gas chromatography report that a standard high pure nitrogen adopts this method.
Embodiment
As shown in Figure 1, the utility model comprises airtight sample introduction needle 12 and hookup 16, and wherein airtight sample introduction needle 12 is made up of syringe 4, piston 1, piston headgear 5, location sealing ring 3, piston reset spring 2, needle tubing 8, sealing reseting spring sleeve 6, sealing back-moving spring 7, needle tubing sealing gasket 11, needle tubing sealing cushion cover 9, nut 10.
As shown in Figure 2, hookup 16 is made of sweep gas induction pipe 14, sweep gas outlet 13 and junction pipe 15 respectively.Sweep gas induction pipe 14, sweep gas outlet 13 connect firmly with junction pipe 15 respectively.
Syringe 4 one ends connect firmly with location sealing ring 3, the other end of syringe 4 and needle tubing 8 connect firmly, and are clearance fit between piston 1 and the location sealing ring 3, and piston headgear 5 connects firmly with piston 3, piston headgear 5 is located at syringe 4 inside, and push-and-pull piston 3 can drive piston headgear 5 and reciprocatingly slide in syringe 4.Piston reset spring 2 one ends prop up above-mentioned piston 1, the other end props up above-mentioned location sealing ring 3, sealing ring 3 one sides in location are that the conical surface is consistent with the conical surface tapering of piston 1 bar portion, the conical surface of location sealing ring 3 and the conical surface of piston 1 can reach the purpose of sealing when compressing, sealing reseting spring sleeve 6 and syringe 4 spiral marking connections, needle tubing sealing cushion cover 9 one ends are positioned at sealing reseting spring sleeve 6, the other end and nut 10 spiral marking connections, sealing back-moving spring 6 one ends prop up syringe 4, the other end props up needle tubing sealing cushion cover 9, nut 10 1 ends and needle tubing sealing cushion cover 9 spiral marking connections compress needle tubing sealing gasket 11, and the other end is when sampling or sample introduction and junction pipe 15 spiral marking connections.
As shown in Figure 3, closed container has a thief hatch, with 17 sealings of oversampling packing.Junction pipe 15 1 ends are with nut 10 spiral marking connections of airtight sample introduction needle during sampling; the other end is with hermetic seal container thief hatch spiral marking connection; in junction pipe 15, go out 13 eliminatings of sample pipe from 14 feedings of sweep gas sample introduction pipe and the carrier gas gas with purity of the same race then through sweep gas; guarantee to be in the sweep gas guard mode in the junction pipe 15; promoting airtight sample introduction needle 12 then makes the side opening of needle tubing 8 enter in the junction pipe 15 from the needle tubing sealing gasket; promote piston 1 then and clean syringe 4 and needle tubing 8; then piston 1 is pushed into syringe 4 bottoms; promote again airtight sample introduction needle 12 with needle tubing 8 pass in oversampling packing 17 enter in the detected hermetic seal container; suck detected gas; the effect lower piston 1 bar portion conical surface at piston reset spring 2 closely contacts with the conical surface of location sealing ring 3; reach the purpose of sealing; in the side opening withdrawal needle tubing sealing gasket 11 with needle tubing 8, take out airtight sample introduction needle then.
As shown in Figure 4, one of threeway 18 and junction pipe 15 usefulness spiral marking connections is embedded with sample introduction sealing gasket 20.Junction pipe 15 1 ends are with nut 10 spiral marking connections of airtight sample introduction needle 12 during sample introduction, and the other end connects by the carrier gas pipe 19 and the chromatographic column 21 of threeway 18 with gas chromatograph.In junction pipe 15, go out 13 eliminatings of sample pipe from 14 feedings of sweep gas sample introduction pipe and the carrier gas gas with purity of the same race then through sweep gas; guarantee to be in the sweep gas guard mode in the junction pipe 15; promoting airtight sample introduction needle 12 then makes the side opening of needle tubing 8 pass sample introduction sealing gasket 20 to enter in the threeway 18; promote piston 1 sample introduction then, detected gas will be brought chromatographic column 21 into by carrier gas and be analyzed by gas chromatograph.
Embodiment 1: utilize the utility model method, use ZDII type zirconia gas chromatograph analytical standard high pure nitrogen content as hydrogen 5.1ppm, oxygen 5.2ppm, methane 5.3ppm, carbon monoxide 5.1ppm, obtain collection of illustrative plates such as Fig. 5.
Claims (7)
1. airtight sample introduction needle and hookup, include airtight sample introduction needle (12) and hookup (16), it is characterized in that syringe (4) one ends and location sealing ring (3) connect firmly, the other end of syringe (4) and needle tubing (8) connect firmly, between piston (1) and the location sealing ring (3) is clearance fit, piston headgear (5) connects firmly with piston (1), piston headgear (5) is located at syringe (4) inside, the push-and-pull piston can drive piston headgear (5) and reciprocatingly slide in syringe (4), sealing reseting spring sleeve (6) and syringe (4) spiral marking connection, needle tubing sealing cushion cover (9) one ends are positioned at sealing reseting spring sleeve (6), the other end and nut (10) spiral marking connection, sealing back-moving spring (7) one ends prop up syringe (4), the other end props up needle tubing sealing cushion cover (9), and needle tubing sealing gasket (11) is positioned at needle tubing sealing cushion cover (9) and is compressed by nut (10).
2. according to right request 1 described airtight sample introduction needle and hookup, it is consistent with the conical surface tapering of piston rod portion for the conical surface to it is characterized in that locating sealing ring (3) one side, and the conical surface of location sealing ring (3) and the conical surface of piston can compress the purpose that reaches sealing by piston reset spring (2).
3. according to right request 1 described airtight sample introduction needle and hookup, it is characterized in that locating sealing ring (3) is 30 °～60 ° for the conical surface tapering of the conical surface and piston rod portion simultaneously.
4. according to right request 2 described airtight sample introduction needle and hookups, it is characterized in that needle tubing (8) is hollow kapillary, the end that side and same syringe (4) connect respectively has a hole.
5. according to right request 1 described airtight sample introduction needle and hookup, can be sealed when it is characterized in that sealing back-moving spring (7) and can promote needle tubing sealing shroud (9) and drive needle tubing sealing gasket (11) and make the hole of needle tubing (8) side be positioned at needle tubing sealing gasket (11).
6. according to right request 1 described airtight sample introduction needle and hookup, the hookup airtight sample introduction needle of (16) one client links (12) when it is characterized in that sampling, the other end is with the closed container spiral marking connection of detected gas, the hookup airtight sample introduction needle of (16) one client links (12) during sample introduction, the other end connects by the carrier gas and the chromatographic column of threeway and gas chromatograph.
7. according to right request 6 described airtight sample introduction needle and hookups, it is characterized in that hookup (16) sampling and sample introduction the time use with carrier gas gas purging junction pipe (15) inside with purity of the same race and avoid the interference of air sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200785962U CN201034986Y (en) | 2007-02-13 | 2007-02-13 | Gasproof sample introduction needle and hitch thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200785962U CN201034986Y (en) | 2007-02-13 | 2007-02-13 | Gasproof sample introduction needle and hitch thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034986Y true CN201034986Y (en) | 2008-03-12 |
Family
ID=39195876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200785962U Expired - Fee Related CN201034986Y (en) | 2007-02-13 | 2007-02-13 | Gasproof sample introduction needle and hitch thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034986Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975834A (en) * | 2010-08-19 | 2011-02-16 | 河北省电力研究院 | Quantitative airblast-proof injection device for gas chromatography sample injection |
| CN104614473A (en) * | 2015-02-27 | 2015-05-13 | 云南电网有限责任公司西双版纳供电局 | Sample feeding device for insulating oil chromatographic analysis |
| CN106092264A (en) * | 2016-08-22 | 2016-11-09 | 北京宝德仪器有限公司 | Liquid detection device for atomic spectrum instrument |
| CN110887931A (en) * | 2019-11-20 | 2020-03-17 | 华中科技大学 | Photocatalytic portable water quality total organic carbon detection device and method |
-
2007
- 2007-02-13 CN CNU2007200785962U patent/CN201034986Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975834A (en) * | 2010-08-19 | 2011-02-16 | 河北省电力研究院 | Quantitative airblast-proof injection device for gas chromatography sample injection |
| CN104614473A (en) * | 2015-02-27 | 2015-05-13 | 云南电网有限责任公司西双版纳供电局 | Sample feeding device for insulating oil chromatographic analysis |
| CN106092264A (en) * | 2016-08-22 | 2016-11-09 | 北京宝德仪器有限公司 | Liquid detection device for atomic spectrum instrument |
| CN110887931A (en) * | 2019-11-20 | 2020-03-17 | 华中科技大学 | Photocatalytic portable water quality total organic carbon detection device and method |
| CN110887931B (en) * | 2019-11-20 | 2021-05-18 | 华中科技大学 | Photocatalytic portable water quality total organic carbon detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20120213 |