CN202330374U - Combined sample injection port - Google Patents
Combined sample injection port Download PDFInfo
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- CN202330374U CN202330374U CN2011203586168U CN201120358616U CN202330374U CN 202330374 U CN202330374 U CN 202330374U CN 2011203586168 U CN2011203586168 U CN 2011203586168U CN 201120358616 U CN201120358616 U CN 201120358616U CN 202330374 U CN202330374 U CN 202330374U
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- injection port
- sample
- fixture
- cavity
- sample injection
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Abstract
The utility model relates to a combined sample injection port, which comprises a sample injection port body connected with sample injection pipes. The combined sample injection port is characterized by also comprising at least two sample injection cavities, fixing parts, cavities and sealing parts, wherein the sample injection cavities are formed on the sample injection port body; the internal diameter of each sample injection cavity is matched with the external diameter of a corresponding sample injection pipe; the sample injection cavities with smaller internal diameters are formed on the sample injection cavities with larger internal diameters; the fixing parts fix the sample injection pipes penetrating through the fixing parts; the cavities are formed between the sample injection cavities and the fixing parts; and the sealing parts are arranged in the cavities, and seal the sample injection pipes and opposite sample injection cavities when tightly pressed by the fixing parts. The combined sample injection port has the advantages of low cost, convenience for operation, high compatibility and the like.
Description
Technical field
The utility model relates to a kind of injection port, especially a kind of combined type injection port that can be applicable to universal chromatograph.
Background technology
Injection port is the core component in the universal gas chromatography instrument, is used for that chromatographic column is introduced in fluid sample vaporization back and analyzes.
The common injection port that present each instrument produces family's outfit generally is divided into capillary sample inlet mouth and packed column injection port two big classes.
The capillary column injection port is used to connect the less kapillary of caliber, can be used for the analysis of most of trace organic substance, requires system to have less dead volume simultaneously.
The packed column injection port is mainly used in and connects bigbore packed column, and the packed column caliber is used for the analysis of inorganic samples and part organic sample generally at 3～6mm; Because of flow rate of carrier gas is bigger, have no special requirements for system's dead volume.
Therefore, each instrument produces tame general two injection port configurations of adopting at present, to different analytic targets, according to a kind of injection port of each independent configuration of application of kapillary and packed column.Change like the analytic sample kind, then need to change again injection port is installed.There is following problem in this mode with capillary column injection port and packed column injection port independence separate configuration:
1, cost is high
The client buys various injection port for to different application, makes cost improve greatly.
2, use inconvenience
The client in use changes different injection ports according to the different needs of analytic target, and the general user can't accomplish the replacing of injection port voluntarily, therefore uses very inconvenience.
The utility model content
In order to solve above-mentioned deficiency of the prior art, the utility model provides the combined type injection port that cost is low, easy and simple to handle, be applicable to universal chromatograph.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of combined type injection port comprises the injection port entity that joins with the sample introduction pipe, and be characterized in: said injection port further comprises:
At least two sample cavitys, said sample cavity are arranged on the injection port entity, and the external diameter of the internal diameter of said sample cavity and corresponding sample introduction pipe is corresponding, and the sample cavity that internal diameter is little is arranged on the big sample cavity of internal diameter;
Fixture, said fixture will pass the sample introduction pipe of fixture and fix;
Cavity, said cavity are arranged between sample cavity and the fixture;
Seal, said seal are arranged in the said cavity, when said seal fixture compresses with sealing between sample introduction pipe and the corresponding with it sample cavity.
As preferably, the internal diameter of said sample cavity is identical with the external diameter of corresponding sample introduction pipe.
The external diameter of the fixture that further, little external diameter sample introduction pipe is corresponding is corresponding with the internal diameter of large diameter sample cavity.
As preferably, the corresponding fixture of said little external diameter sample introduction pipe links to each other with the large diameter sample cavity.
Further, screw thread links to each other between the fixture that said little external diameter sample introduction pipe is corresponding and the large diameter sample cavity.
Further, the fixture that little external diameter sample introduction pipe is corresponding comprises one-level, secondary fixture, and said one-level fixture is used for fixing the sample introduction pipe, and said secondary fixture is used for fixing the one-level fixture.
As preferably, said cavity is arranged between the sample cavity.
Further, said seal is a cutting ferrule.
As preferably, said cutting ferrule is a graphite ferrule.
The utility model compared with prior art has following beneficial effect:
1, cost is low
The combined type injection port of the utility model can compatible packed column injection port and two kinds of patterns of capillary column injection port, greatly reduce user's purchase cost.
2, easy and simple to handle
When analytic target changed, the user only through changing corresponding sample introduction pipe fixture, can realize the conversion between packed column sample introduction and the capillary column sample introduction multiple modes of operation, and not need to change injection port again, has improved the simplicity of user's operation greatly.
3, dead volume is little
Adopt the fixture of low dead volume and the matching design of sample cavity, can effectively reduce packed column and convert the bigger problem of dead volume that produces in the capillary column process to; Need not dismantle injection port and can realize the switching between each pattern of injection port, simple and efficient to handle.
Description of drawings
Fig. 1 is the injection port entity structure synoptic diagram of combined type injection port among the embodiment 1;
Combined type injection port structural representation when Fig. 2 carries out stratographic analysis for adopting 1/4 packed column among the embodiment 1;
Fig. 3 is the injection port entity structure synoptic diagram of combined type injection port among the embodiment 2;
Fig. 4 is the combined type injection port structural representation when adopting the capillary sample inlet pattern among the embodiment 2;
Fig. 5 is the malformation synoptic diagram of kapillary fixture among the embodiment 2;
Fig. 6 is the combined type injection port structural representation when adopting the capillary sample inlet pattern among the embodiment 3.
Embodiment
See also Fig. 1, a kind of combined type injection port is used for chromatograph analyzing organic substance and inorganics simultaneously, is applicable to sample introduction pipe 1/4 packed column, 1/8 packed column and capillary column sample introduction that caliber is different.
Said combined type injection port comprises the injection port entity 10 that joins with the sample introduction pipe and is arranged on sample cavity 11, sample cavity 12 and the sample cavity 13 on the injection port entity 10, also comprises respectively each sample introduction pipe is sealed and fixing seal and fixture like 1/4 packed column, 1/8 packed column and capillary column.
The internal diameter of the external diameter of sample introduction pipe and corresponding with it sample cavity is corresponding, as long as seal can be with sealing between sample introduction pipe and the corresponding with it sample cavity;
As preferably, the sample introduction external diameter of pipe and with it the deviation between the internal diameter of corresponding sample cavity be no more than 10%;
As preferably, sample introduction external diameter of pipe and the internal diameter of corresponding sample cavity is identical with it:
In the present embodiment, the internal diameter of said sample cavity 11 is identical with the external diameter of capillary column, and sample cavity 11 is the sample cavity corresponding with capillary column;
The internal diameter of said sample cavity 12 is identical with the external diameter of 1/8 packed column, and sample cavity 12 is the sample cavity corresponding with 1/8 packed column;
The internal diameter of said sample cavity 13 is identical with the external diameter of 1/4 packed column, and sample cavity 13 is the sample cavity corresponding with 1/4 packed column.
The sample cavity that internal diameter is little is arranged on the big sample cavity of internal diameter, and in the present embodiment, sample cavity 11, sample cavity 12 and sample cavity 13 are separately positioned on the injection port entity 10 from the top down.
Said fixture compresses the seal in the cavity that is arranged between sample cavity and the fixture, and the sample introduction pipe is reached sealing and fixing between the corresponding with it sample cavity.
In the present embodiment, be the sealing and the fixed form of example explanation sample introduction pipe with sample introduction pipe 1//4 packed column.See also Fig. 2; Fixture 21 is the cutting ferrule nut of corresponding sample introduction pipe 1/4 packed column 1, between cutting ferrule nut and the sample cavity 13 cavity is arranged, and respective seals 31 is arranged in the cavity 41; When the cutting ferrule nut of 1/4 packed column 1 is fixed on 10 last times of injection port entity; Can compress corresponding sample introduction seal of tube spare 31, seal 31 is squeezed, and sample introduction pipe 6 is reached sealing and fixing between the corresponding with it sample cavity 13.Inner and cavity part on seal 31 has constituted the dead volume of 1/4 packed column at injection port entity 10.
Said seal 31 is a sample introduction pipe clamp cover, and the cutting ferrule material is a graphite.
The sealing and fixing mode of kapillary and 1/8 packed column is identical with 1/4 packed column.
The utility model is provided with corresponding sample cavity according to sample introduction pipe caliber size sequence, makes the sample introduction pipe that caliber is more little, and its corresponding dead volume is more little, and the dead volume when making capillary sample inlet is less; For packed column, because its flow rate of carrier gas is bigger, then bigger dead volume influences not quite its sample analysis result.
The combined type injection port of the utility model can compatible packed column injection port and two kinds of patterns of capillary column injection port, greatly reduce user's purchase cost.
When analytic target changed, the user only through changing corresponding sample introduction pipe fixture, can realize the conversion between packed column sample introduction and the capillary column sample introduction multiple modes of operation, and not need to change injection port again, improve the simplicity that is used to operate greatly.
Adopt the fixture of low dead volume and the matching design of sample cavity, can effectively reduce packed column and convert the bigger problem of dead volume that produces in the capillary column process to, the switching between each pattern of injection port is very simple and direct, need not dismantle injection port and can realize switching.
See also Fig. 3, Fig. 4, a kind of combined type injection port, different with embodiment 1 described combined type injection port is:
Or sample cavity 11 and and the fixture 201 of kapillary 2 between cavity be arranged between sample cavity 11 and the sample cavity 13, seal is arranged in the cavity, the external diameter of fixture is identical with the internal diameter of sample cavity 13.
In the present embodiment, the external diameter of fixture 201 is identical with the internal diameter of sample cavity 12.See also Fig. 4, the inboard of sample cavity 12 is provided with and fixture 201 respective threads, is connected at sample cavity 12 places through screw thread between fixture 201 and the injection port entity 101; When fixture 201 was screwed, the seal 301 that is arranged in the cavity 42 was fixed with sealing between kapillary and the corresponding with it sample cavity 11 and with kapillary.
Fixture also has other various deformation fixed forms, when being used for the capillary sample inlet pattern, as long as fixture can compress seal 301, it is got final product with sealing between kapillary 2 and the sample cavity 11 corresponding with kapillary 2.See also Fig. 5, be threaded between the first half 221 of fixture and the sample cavity 12, the external diameter of the latter half 222 is identical with the internal diameter of sample cavity 13.
Embodiment 3
See also Fig. 3, Fig. 6, a kind of combined type injection port, different with embodiment 2 described combined type injection ports is:
The fixture of kapillary 2 comprises one-level fixture 202 and secondary fixture 203;
Seal comprises seal 301 and seal 302;
Kapillary 2 passes said one-level fixture 202 and stretches to sample cavity 11 places; The external diameter of said one-level fixture 202 is identical with the internal diameter of sample cavity 12, and said one-level fixture 202 stretches to sample cavity 12 places, need not to be threaded between the sample cavity 12 of said one-level fixture 202 and injection port entity 102;
Said seal 301 is arranged in the cavity 42 between sample cavity 11 and the sample cavity 12; Said seal 302 is arranged in the cavity between one-level fixture 202 and the secondary fixture 203;
When between secondary fixture 203 and the injection port entity 102 fixedly the time; Secondary fixture 203 compresses seal 302; Through one-level fixture 202 power is passed to seal 302 simultaneously and it is compressed; Realize the sealing that kapillary 2 reaches between the corresponding with it sample cavity 11, one-level fixture 202 reaches between the corresponding with it sample cavity 12, fixed kapillary 2 and one-level fixture 202 simultaneously.
Above-mentioned embodiment should not be construed as the restriction to the utility model protection domain.The key of the utility model is: to the occasion of the sample introduction pipe sample introduction analysis that needs the multiple caliber of employing; On the injection port entity, be provided with and the corresponding sample cavity of sample introduction pipe caliber; Fixture through seal and sample introduction pipe is realized the sealing between sample introduction pipe and the corresponding with it sample cavity, simultaneously fixing fixture.Reduce dead volume, improved the compatibility of injection port.The utility model relates to needs the pipe of compatible multiple caliber to make the as far as possible little field of dead volume simultaneously.Under the situation that does not break away from the utility model spirit, any type of change that the utility model is made all should fall within the protection domain of the utility model.
Claims (9)
1. a combined type injection port comprises the injection port entity that joins with the sample introduction pipe, and it is characterized in that: said injection port further comprises:
At least two sample cavitys, said sample cavity are arranged on the injection port entity, and the external diameter of the internal diameter of said sample cavity and corresponding sample introduction pipe is corresponding, and the sample cavity that internal diameter is little is arranged on the big sample cavity of internal diameter;
Fixture, said fixture will pass the sample introduction pipe of fixture and fix;
Cavity, said cavity are arranged between sample cavity and the fixture;
Seal, said seal are arranged in the said cavity, when said seal fixture compresses with sealing between sample introduction pipe and the corresponding with it sample cavity.
2. combined type injection port according to claim 1 is characterized in that: the internal diameter of said sample cavity is identical with the external diameter of corresponding sample introduction pipe.
3. combined type injection port according to claim 1 is characterized in that: the external diameter of the fixture that little external diameter sample introduction pipe is corresponding is corresponding with the internal diameter of large diameter sample cavity.
4. combined type injection port according to claim 3 is characterized in that: the corresponding fixture of said little external diameter sample introduction pipe links to each other with the large diameter sample cavity.
5. combined type injection port according to claim 7 is characterized in that: screw thread links to each other between the corresponding fixture of said little external diameter sample introduction pipe and the large diameter sample cavity.
6. combined type injection port according to claim 1 is characterized in that: the fixture that little external diameter sample introduction pipe is corresponding comprises one-level, secondary fixture, and said one-level fixture is used for fixing the sample introduction pipe, and said secondary fixture is used for fixing the one-level fixture.
7. combined type injection port according to claim 1 is characterized in that: said cavity is arranged between the sample cavity.
8. according to the arbitrary described combined type injection port of claim 1～7, it is characterized in that: said seal is a cutting ferrule.
9. combined type injection port according to claim 8 is characterized in that: said cutting ferrule is a graphite ferrule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203586168U CN202330374U (en) | 2011-09-23 | 2011-09-23 | Combined sample injection port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203586168U CN202330374U (en) | 2011-09-23 | 2011-09-23 | Combined sample injection port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330374U true CN202330374U (en) | 2012-07-11 |
Family
ID=46442350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203586168U Expired - Fee Related CN202330374U (en) | 2011-09-23 | 2011-09-23 | Combined sample injection port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359993A (en) * | 2011-09-23 | 2012-02-22 | 聚光科技(杭州)股份有限公司 | Composite sample inlet |
-
2011
- 2011-09-23 CN CN2011203586168U patent/CN202330374U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359993A (en) * | 2011-09-23 | 2012-02-22 | 聚光科技(杭州)股份有限公司 | Composite sample inlet |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20160923 |