CN214585159U - Gas sampling device of chromatograph - Google Patents
Gas sampling device of chromatograph Download PDFInfo
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- CN214585159U CN214585159U CN202120594807.8U CN202120594807U CN214585159U CN 214585159 U CN214585159 U CN 214585159U CN 202120594807 U CN202120594807 U CN 202120594807U CN 214585159 U CN214585159 U CN 214585159U
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Abstract
The utility model relates to a sampling device, in particular to gaseous sampling device of chromatograph. The structure of the quantitative injector holder comprises a transparent injector quantitative holder, the injector quantitative holder comprises a holder body, the holder body is provided with a fixing hole for inserting and embedding an injector, the holder body on one side of the fixing hole is divided into two parts, the two parts are connected and locked through a locking mechanism, and the holder body on the other side of the fixing hole is provided with a through hole for inserting and embedding a fixed adjusting rod. The utility model discloses a gaseous sampling device of chromatograph, its measurement accuracy is high and sealed effectual.
Description
Technical Field
The utility model relates to a sampling device, in particular to gaseous sampling device of chromatograph.
Background
When a gas chromatograph is used for analysis, the sampling of standard gas or sample gas can be generally divided into two categories: one is to inject the sample through a six-way or ten-way valve, the sample injection is better, the sample injection is quantitative, accurate and good in repeatability, the reverse control can be realized, and the unattended online gas chromatograph adopts the mode; another method is to take gas with a syringe or a gas injection needle, then manually quantify (by observing the scale lines with eyes and then reading), and inject the quantified gas into the vaporization chamber of the chromatograph.
At present, the defects of the artificial sample injection are as follows:
1. conventional syringes can be divided into: glass syringe and plastic syringe, no matter which kind of syringe its scale mark is big all fuzzy, and the people's reading of difference when getting gas and advance a kind has the deviation, and even if the same one looks up, look down its data of reading of syringe all is different, and the difference of air input can directly influence the analysis result of chromatograph, will directly influence the chemical industry operating personnel in chemical industry enterprise analysis result to production technology's adjustment, consequently must require to carry out accurate gas of getting to standard gas, sample gas.
2. Glass and plastic syringes also have a serious drawback: the sealing property is poor, and air leakage is easy.
3. The gas injection amount is generally between 0.5 and 2ml, mostly within 1ml, the gas injection amount is small, so the volume of the injector is small, if the tightness of the plunger rod of the injector and the inner wall of the injector is poor, the standard gas or the sample gas in the cavity of the injector leaks out along the annular gap between the plunger rod and the inner wall of the injector, the gas injection amount is reduced, and the analysis data is influenced.
4. An airtight syringe: the domestic or imported airtight syringes generally have good airtightness, but are very expensive, and the analysis results are deviated due to human reasons during reading.
Disclosure of Invention
In order to solve the problem of the prior art, the utility model provides a gaseous sampling device of chromatograph, its measurement accuracy is high and sealed effectual.
The utility model discloses the technical scheme who adopts as follows:
the utility model provides a gaseous sampling device of chromatograph, includes transparent material's syringe ration holder, syringe ration holder includes the holder body, the holder body on be provided with and be used for inserting the fixed orifices that inlays the syringe, the holder body of fixed orifices one side be divided two parts, just two parts between connect the locking through locking mechanism, the holder body of fixed orifices opposite side on be provided with and be used for inserting the through-hole of inlaying fixed regulation pole.
The locking mechanism comprises a locking screw and a locking nut which are in threaded connection with each other, the locking screw penetrates through a locking hole in the holder body to be connected with the locking nut, and an anti-skid gasket is further arranged on the inner side of the locking nut.
The adjusting rod is L-shaped, the vertical part of the adjusting rod is arranged in the through hole and is fixed through the fastening nut group, and the horizontal part of the adjusting rod is positioned above the fixing hole and is used for limiting the extraction amplitude of the injector.
The nut group comprises two groups of fastening nuts, and the fastening nuts are respectively positioned on the adjusting rods above and below the clamp seat body.
The adjusting rod is provided with external threads which are meshed with the internal threads on the inner wall of the through hole.
The utility model provides a beneficial effect that technical scheme brought is:
1. accurate quantification and good repeatability:
through the utility model discloses analysis repeatability to the sample is good, and its 7 relative standard deviation RSD values of needle can be controlled and be being less than or equal to 0.5%, is far less than national standard's 3.0%, can not bring inevitable deviation because of the reason of reading, different people's reason!
2. The leakproofness is good:
the sealing part of the injector adopts the imported silicone grease, which has excellent inertia, can not adsorb certain components in a standard product or a sample, can not release any gas, and can not cause system pollution; meanwhile, a liquid film is formed, so that the gas in the injector is always in a closed state and cannot be polluted.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram (before sampling) of a gas sampling device of a chromatograph according to the present invention;
fig. 2 is a schematic structural diagram of a gas sampling device of a chromatograph according to the present invention (after sampling);
fig. 3 is a schematic structural view of the injector quantitative holder of the chromatograph gas sampling device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1-3, a chromatograph gas sampling device comprises a transparent injector quantitative holder 1, the injector quantitative holder 1 comprises a holder body 11, the holder body 11 is provided with a fixing hole 12 for inserting and embedding an injector 2, the holder body 11 on one side of the fixing hole 12 is divided into two parts 13, the two parts 13 are connected and locked by a locking mechanism, and the holder body 11 on the other side of the fixing hole 12 is provided with a through hole 14 for inserting and embedding a fixing and adjusting rod 3.
The locking mechanism of this embodiment includes locking screw 4 and lock nut 5 of mutual spiro union, locking screw 4 pass locking hole 15 on the holder body 11 is connected lock nut 5, 5 inboards of lock nut still be provided with anti-skidding gasket 6.
The adjusting rod 3 in this embodiment is L-shaped, the vertical part of the adjusting rod is installed in the through hole 14 and fixed by the fastening nut set, and the horizontal part of the adjusting rod is located above the fixing hole 12 and used for limiting the drawing amplitude of the injector 2.
The nut group comprises two groups of fastening nuts 16, and the fastening nuts 16 are respectively positioned on the adjusting rod 3 above and below the holder body 11.
The adjustment rod 3 in this embodiment is provided with an external thread which is in mutual engagement with an internal thread in the inner wall of the through hole 14.
When the chromatograph gas sampling device of the embodiment is used, the chromatograph gas sampling device comprises the following steps:
1. fixing the injector:
the injector 2 is inserted into a fixing hole 12 with the diameter of 8.5 of the injector quantitative holder 1, and the position is properly centered; then, a locking screw 4 is sleeved with an anti-skid gasket 6 and penetrates through a locking hole 15 of the syringe quantitative clamping seat 1, and the other end of the syringe quantitative clamping seat is backed with a locking nut 5 and is slightly tightened with strength;
2. fixing an adjusting rod:
screwing the adjusting rod 3 into a fastening nut 16 to the uppermost end, then screwing the adjusting rod 3 into a fixing hole 12 of the quantitative holder 1 of the injector, sequentially penetrating a flat pad and an elastic pad at the lower end of the adjusting rod 3, tightening the fastening nut 16 tightly, and only needing to use strength slightly;
3. syringe volume quantification:
the quantitative holder 1 of the syringe is made of acrylic transparent material, when quantification is needed, a push rod of the syringe 2 is drawn to corresponding scales, then the upper edge or the lower edge of the quantitative holder 1 of the syringe is aligned, a locking screw 4 at a locking hole 15 is tightly screwed by a screwdriver, then an adjusting rod 3 is adjusted, the horizontal part of the adjusting rod 3 is aligned with the top end of the push rod of the syringe 2, finally fastening nuts 16 above and below the adjusting rod 3 are tightened, and the purpose of taking the label gas or the sample gas at each time is achieved only by pushing the push rod of the syringe to the top end.
The utility model discloses can realize accurate ration, eliminate the people and observe the different analysis result deviations that lead to of scale mark, different operating personnel use the utility model discloses a device carries out the sample operation, and the data result that obtains is unanimous.
The utility model provides an injector is special syringe, and its push rod outside is the dull polish surface, and the internal surface of syringe also is the dull polish face, adopts the special import silicone grease of chromatogram (the splendid WS-201SP of inertia) coating simultaneously, just so forms the one deck liquid film between push rod and inner wall, can not exert an influence to the sample that will analyze, but has played fabulous sealed effect.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The utility model provides a chromatograph gas sampling device, includes transparent material's syringe ration holder, its characterized in that, syringe ration holder include the holder body, the holder body on be provided with and be used for inserting the fixed orifices of inlaying the syringe, the holder body of fixed orifices one side be divided two parts, just two parts between connect the locking through locking mechanism, the holder body of fixed orifices opposite side on be provided with and be used for inserting the through-hole of inlaying fixed regulation pole.
2. A chromatograph gas sampling device according to claim 1, wherein the locking mechanism comprises a locking screw and a locking nut that are screwed with each other, the locking screw passes through a locking hole on the holder body and is connected with the locking nut, and an anti-slip gasket is further disposed inside the locking nut.
3. A chromatograph gas sampling device according to claim 1, wherein said adjustment rod is L-shaped, with a vertical portion thereof mounted in said through hole and fixed thereto by a set of fastening nuts, and a horizontal portion thereof located above said fixing hole for limiting the withdrawal amplitude of said injector.
4. A chromatograph gas sampling device according to claim 3, wherein said nut set comprises two sets of fastening nuts, said fastening nuts being located on said adjustment rod above and below said cartridge body, respectively.
5. A chromatograph gas sampling device according to claim 1 or 3, wherein the adjustment rod is provided with external threads that engage with internal threads on the inner wall of the through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120594807.8U CN214585159U (en) | 2021-03-24 | 2021-03-24 | Gas sampling device of chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120594807.8U CN214585159U (en) | 2021-03-24 | 2021-03-24 | Gas sampling device of chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214585159U true CN214585159U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120594807.8U Active CN214585159U (en) | 2021-03-24 | 2021-03-24 | Gas sampling device of chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214585159U (en) |
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2021
- 2021-03-24 CN CN202120594807.8U patent/CN214585159U/en active Active
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