CN209372766U - The gas chromatograph sampling device of head-exchangeable - Google Patents
The gas chromatograph sampling device of head-exchangeable Download PDFInfo
- Publication number
- CN209372766U CN209372766U CN201822099803.3U CN201822099803U CN209372766U CN 209372766 U CN209372766 U CN 209372766U CN 201822099803 U CN201822099803 U CN 201822099803U CN 209372766 U CN209372766 U CN 209372766U
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- CN
- China
- Prior art keywords
- needle
- clamping portion
- card slot
- guide post
- syringe needle
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of gas chromatograph sampling devices of head-exchangeable, are related to technical field of chromatographic analysis.It provides a kind of gas chromatograph sampling device of head-exchangeable for capableing of quick-replaceable syringe needle.The guide post is connected in chromatographic column equipment, and the pilot hole for leading to chromatographic column equipment injection port is provided in the guide post, and the internal diameter of the pilot hole and the outer diameter of sample introduction needle match, and the needle tubing and syringe needle junction are set as Detachable connection structure；The Detachable connection structure includes clamping portion and the card slot that matches with clamping portion, the clamping portion is set to the side end far from needle tip, it is arranged on the clamping portion fluted, matched sealing ring is installed in the groove, the card slot is set to needle tubing inner hole oral area, and the clamping portion is connected in card slot.Syringe needle is connected in the card slot of needle tubing by clamping portion, once there is syringe needle buckling phenomenon, syringe needle can quickly be pulled to the replacement for realizing syringe needle out of needle tubing.
Description
Technical field
The utility model relates to technical field of chromatographic analysis, and in particular to a kind of gas chromatograph sampling dress of head-exchangeable
It sets.
Background technique
Chromatograph is to carry out qualitative and quantitative analysis to substance using chromatography, and study the Wuli-Shili-Renli system approach of substance
Instrument is used as Experiment of Instrumental Analysis in chemical industry, raw work, Majors of Food, it can also be used to scientific research and conventional analysis.Sample presentation needle is using
It often will appear following situations in the process, 1. injection port is twisted too tight, at room temperature the stubborn too tightly silicon when temperature of vaporization chamber increases
Can be tighter after the expansion of glue gasket, at this moment syringe is difficult to prick, and overexerts and is easy to cause gas chromatographic sample introduction syringe needle
Curve song；2. sample presentation needle generally by visually observing position, is easy to cause position that inaccurate syringe needle is looked for prick in sample introduction during insertion
Mouth metal position, also results in the possibility for syringe needle bending deformation occur, and syringe needle bending once occurs, which just can not
Normal use influences the process of experiment, also extremely wastes if directly lost sample presentation needle, increase experimental cost.
Utility model content
The technical problem to be solved by the utility model is to provide the gas phases that one kind is capable of the head-exchangeable of quick-replaceable syringe needle
Chromatograph sampling device.
The technical scheme adopted by the utility model to solve the technical problem is as follows: the gas chromatograph sampling of head-exchangeable fills
It sets comprising chromatographic column equipment, guide post and sample introduction needle, the guide post are connected in chromatographic column equipment, the guide post
On be provided with the pilot hole for leading to chromatographic column equipment injection port, the internal diameter of the pilot hole and the outer diameter of sample introduction needle match, institute
Stating sample introduction needle includes needle tubing and syringe needle, and the needle tubing and syringe needle junction are set as Detachable connection structure；
The Detachable connection structure includes clamping portion and the card slot that matches with clamping portion, and the clamping portion is set to
A side end far from needle tip, is arranged on the clamping portion fluted, is equipped in the groove matched close
Seal, the card slot are set to needle tubing inner hole oral area, and the clamping portion is connected in card slot.
Further, the card slot inner wall is provided with the inclined surface for clamping portion insertion.
Further, it is threadedly coupled between the guide post and chromatographic column equipment.
Further, the joint face between the guide post and chromatographic column equipment is provided with towards guide post centerline direction and inclines
Oblique inclined surface.
Further, the angle between the inclined direction of the inclined surface and guide post axial direction is 5~10 DEG C.
Further, the sealing ring is neoprene.
The beneficial effects of the utility model are: the gas chromatograph sampling device of the head-exchangeable of the application, syringe needle pass through card
Socket part is connected in the card slot of needle tubing, once there is syringe needle buckling phenomenon, syringe needle can quickly be pulled to realization out of needle tubing
Then the replacement of syringe needle reinserts new syringe needle and continues to use, both will not influence the process of experiment, and replace very
It is convenient and efficient, greatly improve working efficiency.
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
The a part of attached drawing as the application, is further understood from the utility model for providing, the utility model
Illustrative embodiments and their description for explaining the utility model, but do not constitute improper limits to the present invention.Obviously,
The accompanying drawings in the following description is only some embodiments, to those skilled in the art, is not paying creative labor
Under the premise of dynamic, it can also be obtained according to these attached drawings other accompanying drawings.In the accompanying drawings:
Fig. 1 is gas chromatograph sampling apparatus structure schematic diagram；
Fig. 2 is needle tubing structural schematic diagram；
Fig. 3 is needle head structure schematic diagram；
It is as shown in the figure: 1- chromatographic column equipment；2- guide post；3- sample introduction needle；30- needle tubing；31- syringe needle；301- card slot；311-
Clamping portion；312- groove；313- rubber layer；4- pilot hole.
It should be noted that these attached drawings and verbal description are not intended to limit the design of the utility model in any way
Range, but illustrate the concept of the utility model for those skilled in the art by referring to specific embodiments.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
The technical solution in embodiment is clearly and completely described in attached drawing in type embodiment, and following embodiment is for illustrating this
Utility model, but be not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for describing the utility model and simplifying description, rather than the device or element of indication or suggestion meaning must have specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.
For the ordinary skill in the art, can be understood with concrete condition above-mentioned term in the present invention specifically contain
Justice.
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1-Figure 3, the gas chromatograph sampling device of the head-exchangeable of the utility model comprising chromatographic column equipment
1, guide post 2 and sample introduction needle 3, the guide post 2 are connected in chromatographic column equipment 1, are provided in the guide post 2 and are led to color
The pilot hole 4 of 1 injection port of column equipment is composed, pilot hole 4 there can be an accurately positioning to the insertion position of sample introduction needle 3, prevent
Position looks for inaccurate syringe needle to prick the injection port metal position the phenomenon that, the internal diameter and the outer diameter phase of sample introduction needle 3 of the pilot hole 4
Match, can may be transition fit for clearance fit between the pilot hole 4 and sample presentation needle 3, smooth can be inserted with sample presentation needle 3
Enter pilot hole 4 to be preferred, the sample introduction needle 3 includes needle tubing 30 and syringe needle 31, and the needle tubing 30 is set as with 31 junction of syringe needle can
Dismantling connection structure；Needle tubing 30 is detachably connected with syringe needle 31, can be replaced in time to curved syringe needle 31, then again
Replacement is inserted into new syringe needle and is continued to use, and will not influence the process of experiment.
Detachable connection structure can be to be threadedly coupled, but it is complicated to be threadedly coupled processing, and during replacement
Threading is relatively time-consuming, and the Detachable connection structure includes clamping portion 311 and the card slot to match with clamping portion 311 301,
It can be excessively cooperation or interference fit between clamping portion 311 and card slot 301, can be tightly inserted into clamping portion 311
Use process, which is not fallen, in card slot 301 is preferred, and the clamping portion 311 is set to the side end far from 31 needle point of syringe needle, described
Fluted 312 are arranged on clamping portion 311, the circle that the groove 312 is set as annular is generally best, in the groove 312
Matched sealing ring 313 is installed, the sealing ring 313 is used not only for preventing from connecting between needle tubing 30 and syringe needle 31
Connect place liquid it is exposed, and sealing ring 313 be inserted into card slot 301 after by the squeezing action of itself strengthen clamping portion 311 and
Being completely embedded property between card slot 301, can effectively prevent the falling in use of syringe needle 31, and the card slot 301 is arranged
In 30 inner hole oral area of needle tubing, the clamping portion 311 is connected in card slot 301, and clamping portion 311 is inserted into card slot 301, card is passed through
Frictional fit between socket part 311 and card slot 301 realizes installation, this structure is not only installed simply, but also can quickly be realized
The disassembly of syringe needle 31 uses simple and efficient.
Its course of work is as follows, and the syringe needle 31 of sample introduction needle 3 accurately enters chromatography by the guiding role of pilot hole 4
In the injection port of column equipment 1, syringe needle 31 is caused buckling phenomenon occur once there is fortuitous event, since syringe needle 31 passes through clamping portion
311 are connected in the card slot 301 of needle tubing 30, it is only necessary to directly pull the clamping portion 311 of syringe needle 31 out of card slot 301, energy
Enough disassemblies for quickly realizing syringe needle 31, then reinsert new syringe needle 31 and continue to use, both will not influence the process of experiment,
And replacement is got up very convenient quick, is improved work efficiency.
In order to guarantee compactness that clamping portion 311 is connect with card slot 301,301 inner wall of card slot is provided with for being clamped
The inclined surface that portion 311 is inserted into.The setting of inclined surface can not only guarantee that clamping portion 311 is more rapidly inserted into card slot 301, and make
It is more preferable to obtain the compactness that clamping portion 311 is connect with card slot 301.
In order to realize the Fast Installation of guide post 2, it is threadedly coupled between the guide post 2 and chromatographic column equipment 1.
In order to guarantee the compactness connected between guide post 2 and chromatographic column equipment 1, the guide post 2 and chromatographic column equipment 1
Between joint face be provided with towards the inclined inclined surface of 2 centerline direction of guide post.The setting of inclined surface can not only guarantee to lead
It is more rapidly inserted into chromatographic column equipment 1 to column 2, and makes the compactness connected between guide post 2 and chromatographic column equipment 1 more
Add stabilization.
The application has found through a large number of experiments, the angle between 2 axial direction of inclined direction and guide post of the inclined surface
It is best for 5~10 DEG C.
In order to enhance the corrosion resistance of sealing ring 313, the sealing ring 313 is neoprene.There is good physical mechanical
Performance, tensile strength, elongation and reversible crystallinity with higher, cementability are good.It is ageing-resistant, heat-resisting.Oil resistant, chemically-resistant
Corrosivity is excellent, can effectively prevent the corrosion of liquid, improves the service life of sealing ring 313.
The above is only the preferred embodiment of the utility model, not makees in any form to the utility model
Limitation, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with
The technical staff of this patent is not departing within the scope of technical solutions of the utility model, when the technology contents work using above-mentioned prompt
A little equivalent embodiment changed or be modified to equivalent variations out, but all contents without departing from technical solutions of the utility model,
Any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still belong to
In the range of the utility model.
Claims (6)
1. the gas chromatograph sampling device of head-exchangeable, it is characterised in that: including chromatographic column equipment (1), guide post (2) and into
Sample needle (3), the guide post (2) are connected on chromatographic column equipment (1), are provided on the guide post (2) and lead to chromatographic column and set
The pilot hole (4) of standby (1) injection port, the internal diameter of the outer diameter and pilot hole (4) of the sample introduction needle (3) match, the sample introduction needle
It (3) include needle tubing (30) and syringe needle (31), the needle tubing (30) and syringe needle (31) junction are set as Detachable connection structure；
The Detachable connection structure includes clamping portion (311) and the card slot (301) to match with clamping portion (311), the card
Socket part (311) is set to a side end of the needle point far from syringe needle (31), and fluted (312) are arranged on the clamping portion (311),
It is equipped with matched sealing ring (313) in the groove (312), the card slot (301) is in needle tubing (30) inner hole, institute
Clamping portion (311) is stated to be connected in card slot (301).
2. the gas chromatograph sampling device of head-exchangeable as described in claim 1, it is characterised in that: in the card slot (301)
Wall is provided with the inclined surface for clamping portion (311) insertion.
3. the gas chromatograph sampling device of head-exchangeable as described in claim 1, it is characterised in that: the guide post (2) with
Chromatographic column equipment is threadedly coupled between (1).
4. the gas chromatograph sampling device of head-exchangeable as claimed in claim 3, it is characterised in that: the guide post (2) with
Under joint face between chromatographic column equipment (1) is set as inclined surface, and the outer diameter on guide post (2) top where inclined surface is greater than
The outer diameter in portion.
5. the gas chromatograph sampling device of head-exchangeable as claimed in claim 4, it is characterised in that: the inclination of the inclined surface
Angle between direction and guide post (2) axial direction is 5~10 DEG C.
6. the gas chromatograph sampling device of head-exchangeable as described in claim 1, it is characterised in that: the sealing ring (313)
For neoprene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822099803.3U CN209372766U (en) | 2018-12-13 | 2018-12-13 | The gas chromatograph sampling device of head-exchangeable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822099803.3U CN209372766U (en) | 2018-12-13 | 2018-12-13 | The gas chromatograph sampling device of head-exchangeable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209372766U true CN209372766U (en) | 2019-09-10 |
Family
ID=67832775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822099803.3U Expired - Fee Related CN209372766U (en) | 2018-12-13 | 2018-12-13 | The gas chromatograph sampling device of head-exchangeable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209372766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11813588B2 (en) | 2015-01-15 | 2023-11-14 | Dionex Corporation | Chromatographic material having improved pH stability, method for preparation thereof and uses thereof |
-
2018
- 2018-12-13 CN CN201822099803.3U patent/CN209372766U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11813588B2 (en) | 2015-01-15 | 2023-11-14 | Dionex Corporation | Chromatographic material having improved pH stability, method for preparation thereof and uses thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190910 Termination date: 20201213 |