CN210690501U - Sample introduction device of gas chromatograph - Google Patents
Sample introduction device of gas chromatograph Download PDFInfo
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- CN210690501U CN210690501U CN201921480394.XU CN201921480394U CN210690501U CN 210690501 U CN210690501 U CN 210690501U CN 201921480394 U CN201921480394 U CN 201921480394U CN 210690501 U CN210690501 U CN 210690501U
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Abstract
The utility model provides a sample feeding device of a gas chromatograph, which comprises a gas carrying cylinder, a vaporizing device and a detection chromatograph, the gas-carrying bottle is connected with the vaporizing device through a gas-carrying pipe, the vaporizing device is connected with the detection chromatograph through a gas inlet pipe, the vaporizing device comprises a high-temperature heater and a sample processing chamber arranged in the high-temperature heater, the gas carrying pipe is communicated with the sample processing chamber, a sample cylinder is arranged in the sample processing chamber, the sample cylinder divides the interior of the sample processing chamber into an air inlet cavity and a sample cavity which are communicated, a filter screen is arranged in the sample cavity, asbestos is arranged on the filter screen, a sealing cover is arranged at the top of the sample cavity and comprises a cover body, the cover body is in threaded connection with the sample cavity, a high-temperature-resistant sealing piece is arranged at the center of the cover body, and a connecting pipe is further arranged at the center of the high-temperature sealing piece. The utility model discloses be provided with vapourizing unit for carry out the pretreatment, convenient to use to the sample.
Description
Technical Field
The utility model relates to a detect technical field, concretely relates to gas chromatograph sampling device.
Background
The gas chromatograph is an important analysis and detection instrument, is widely applied to a plurality of fields of food detection, environmental monitoring, petrochemical industry, medicine and health and the like, and has the principle that gaseous molecules of a sample are mixed with carrier gas molecules and then are separated and detected through a chromatographic column. If the sample to be measured is liquid or contains a small amount of liquid substances, the sample needs to be pretreated, the pretreatment effect of the sample has a large influence on the analysis result, and even the gas inlet pipeline can be blocked, so that the sample feeding failure is caused. Therefore, a sample introduction device for a gas chromatograph is urgently needed to solve the existing problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gas chromatograph sampling device to prior art not enough.
The utility model provides a following technical scheme:
a sample introduction device of a gas chromatograph comprises a gas carrying cylinder, a vaporizing device and a detection chromatograph, wherein the gas carrying cylinder is connected with the vaporizing device through a gas carrying pipe, the vaporizing device is connected with the detection chromatograph through a gas inlet pipe, a filter is arranged on the gas inlet pipe, the vaporizing device comprises a high-temperature heater and a sample processing chamber arranged in the high-temperature heater, the gas carrying pipe is communicated with the sample processing chamber, a sample barrel is arranged in the sample processing chamber, the sample barrel divides the interior of the sample processing chamber into a gas inlet cavity and a sample cavity, the gas inlet cavity is communicated with the sample cavity, a filter screen is arranged in the sample cavity, asbestos is arranged on the filter screen, a sealing cover is arranged at the top of the sample cavity and comprises a cover body, the cover body is in threaded connection with the sample cavity, and a high-temperature resistant sealing element is arranged at, and a connecting pipe is also arranged at the center of the high-temperature sealing element.
Preferably, the gas-carrying cylinder is connected with a pressure gauge, and a safety valve, a mass flow controller and a rotameter are sequentially arranged between the gas-carrying cylinder and the vaporizing device.
Preferably, the gas carrying pipe is connected with the upper end of the sample processing chamber, and the gas carrying pipe is communicated with the gas inlet cavity.
Preferably, the top end and the bottom end of the high-temperature sealing element are respectively provided with an upper clamping block and a lower clamping block, the top end and the bottom end of the center of the cover body are provided with an upper clamping groove and a lower clamping groove, the upper clamping block is clamped into the upper clamping groove, and the lower clamping block is clamped into the lower clamping groove.
Preferably, a circular-ring-shaped stop block is arranged in the sample cavity, a sealing gasket is further arranged between the stop block and the high-temperature sealing element, and a convex block is arranged on the outer wall of the connecting pipe and located below the sealing gasket.
Preferably, the intake pipe with the connecting pipe links to each other, the intake pipe with the outer wall winding of filter has the electric heating area, the electric heating area with be equipped with the thermocouple between the intake pipe, the electric heating area with the thermocouple all links to each other with temperature controller.
Preferably, the detection chromatogram is also connected with an air outlet pipe, and the air outlet pipe is also wound in the electric heating belt.
Preferably, the outlet end of the air outlet pipe is connected with a water bottle, the water bottle is further connected with an air outlet pipe, the outlet of the air outlet pipe is located below the liquid level in the water bottle, and the inlet of the air outlet pipe is located above the liquid level in the water bottle.
Preferably, a bypass pipe is connected between the carrier gas pipe and the gas inlet pipe.
The utility model has the advantages that:
the utility model is provided with a vaporizing device for pretreating samples, is convenient to use and does not need to change the detection chromatogram; in the use process of the utility model, the injector pierces the high-temperature sealing element and the sealing gasket to inject the sample to the asbestos, the sample is vaporized in the sample cavity, the carrier gas is mixed with the gaseous molecules of the sample, and then the mixture enters the air inlet pipe through the connecting pipe, and the detection is carried out by utilizing the detection chromatogram, wherein the arrangement of the sample cylinder is helpful to prolong the retention time of the carrier gas in the sample processing chamber; the air inlet pipe and the air outlet pipe of the utility model are wound with electric heating belts, and the temperature is controlled by the temperature controller and the thermocouple, so that the gaseous molecules are prevented from condensing before entering the detection chromatogram and after flowing out of the detection chromatogram, and further the pipeline is prevented from being blocked; the utility model discloses an outlet duct is connected with the water-jug, through the bubble condition in the water-jug, can judge the gas circuit condition.
Drawings
The accompanying drawings are included to provide a further understanding and description of the invention.
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural view of the vaporization apparatus of the present invention.
Labeled as: 1. a gas-carrying cylinder; 2. a vaporization device; 3. detecting the chromatogram; 4. a carrier gas pipe; 5. an air inlet pipe; 6. a filter; 7. a high temperature heater; 8. a sample cartridge; 9. an air inlet cavity; 10. a sample chamber; 11. filtering with a screen; 12. asbestos; 13. a cover body; 14. a high temperature resistant seal; 15. a connecting pipe; 16. a pressure gauge; 17. a safety valve; 18. a mass flow controller; 19. a rotameter; 20. an upper clamping block; 21. a lower clamping block; 22. a bypass pipe; 23. a stopper; 24. a gasket; 25. a bump; 26. an electrical heating belt; 27. a thermocouple; 28. a temperature controller; 29. an air outlet pipe; 30. a water bottle; 31. and (4) exhausting the gas.
Detailed Description
As shown in fig. 1 and 2, a sample introduction device of a gas chromatograph comprises a gas carrying cylinder 1, a vaporizing device 2 and a detection chromatograph 3, wherein the gas carrying cylinder 1 is connected with the vaporizing device 2 through a gas carrying pipe 4, the vaporizing device 2 is connected with the detection chromatograph 3 through a gas inlet pipe 5, and a bypass pipe is connected between the gas carrying pipe 4 and the gas inlet pipe 5. The gas carrying bottle 1 is connected with a pressure gauge 16, a safety valve 17, a mass flow controller 18 and a rotor flow meter 19 are sequentially arranged between the gas carrying bottle 1 and the vaporizing device 2, the mass flow controller 18 plays a role in controlling gas flow, and the rotor flow meter 19 plays a role in monitoring gas flow.
The vaporizing device 2 comprises a high-temperature heater 7 and a sample processing chamber arranged in the high-temperature heater 7, a sample barrel 8 is arranged in the sample processing chamber, the sample barrel 8 divides the interior of the sample processing chamber into an air inlet cavity 9 and a sample cavity 10, a gas carrying pipe 4 is connected with the upper end of the sample processing chamber, the gas carrying pipe 4 is communicated with the air inlet cavity 9, and the air inlet cavity 9 is communicated with the sample cavity 10. Be equipped with filter screen 11 in the sample chamber 10, be equipped with asbestos 12 on the filter screen 11, sample chamber 10 top is equipped with the closing cap, and the closing cap includes lid 13, lid 13 and sample chamber 10 threaded connection, and lid 13 center department is equipped with high temperature resistant sealing member 14, and high temperature sealing member's center department still is equipped with connecting pipe 15. The top and the bottom of high temperature seal spare are equipped with fixture block 20 and lower fixture block 21 respectively, and the top and the bottom of the center department of lid 13 are equipped with draw-in groove and lower draw-in groove, go up in the draw-in groove is gone into to fixture block 20 card, and lower fixture block 21 card is gone into down in the draw-in groove, are equipped with annular dog 23 in the sample chamber 10, still are equipped with sealed pad 24 between dog 23 and the high temperature seal spare, and the outer wall that is located sealed below connecting pipe 15 of pad 24 is equipped with lug 25.
The air inlet pipe 5 is connected with the connecting pipe 15, the filter 6 is arranged on the air inlet pipe 5, the outer walls of the air inlet pipe 5 and the filter 6 are wound with an electric heating belt 26, a thermocouple 27 is arranged between the electric heating belt 26 and the air inlet pipe 5, and the electric heating belt 26 and the thermocouple 27 are both connected with a temperature controller 28. The detection chromatogram 3 is also connected with an air outlet pipe 29, and the air outlet pipe 29 is also wound in the electric heating belt 26. The outlet end of the air outlet pipe 29 is connected with a water bottle 30, the water bottle 30 is also connected with an air outlet pipe 31, the outlet of the air outlet pipe 29 is positioned below the liquid level in the water bottle 30, and the inlet of the air outlet pipe 31 is positioned above the liquid level in the water bottle 30.
The embodiment is provided with the vaporizing device 2 for pretreating a sample, is convenient to use and does not need to change the detection chromatogram 3; in the use process of the embodiment, a sample is injected onto asbestos 12 by puncturing a high-temperature sealing piece and a sealing gasket 24 through an injector, the sample is vaporized in a sample cavity 10, a carrier gas is mixed with gaseous molecules of the sample, then the mixture enters an air inlet pipe 5 through a connecting pipe 15, and then detection is carried out by using a detection chromatograph 3, wherein the arrangement of a sample cylinder 8 is helpful for prolonging the retention time of the carrier gas in a sample processing chamber; the air inlet pipe 5 and the air outlet pipe 29 of the embodiment are wound with the electric heating belt 26, and the temperature is controlled by the temperature controller 28 and the thermocouple 27, so that the gaseous molecules are prevented from being condensed before entering the detection chromatogram 3 and after flowing out of the detection chromatogram 3, and further the pipeline is prevented from being blocked; the air outlet pipe 29 of the present embodiment is connected with a water bottle 30, and the air path condition can be determined by the condition of air bubbles in the water bottle 30.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A sample introduction device of a gas chromatograph is characterized by comprising a gas carrying cylinder, a vaporizing device and a detection chromatograph, wherein the gas carrying cylinder is connected with the vaporizing device through a gas carrying pipe, the vaporizing device is connected with the detection chromatograph through a gas inlet pipe, a filter is arranged on the gas inlet pipe, the vaporizing device comprises a high-temperature heater and a sample processing chamber arranged in the high-temperature heater, the gas carrying pipe is communicated with the sample processing chamber, a sample barrel is arranged in the sample processing chamber, the sample barrel divides the interior of the sample processing chamber into a gas inlet cavity and a sample cavity, the gas inlet cavity is communicated with the sample cavity, a filter screen is arranged in the sample cavity, asbestos is arranged on the filter screen, a sealing cover is arranged at the top of the sample cavity and comprises a cover body, the cover body is in threaded connection with the sample cavity, and a high-temperature resistant sealing element is arranged at the, and a connecting pipe is also arranged at the center of the high-temperature sealing element.
2. The sample introduction device for a gas chromatograph according to claim 1, wherein a pressure gauge is connected to the gas cylinder, and a safety valve, a mass flow controller and a rotameter are sequentially arranged between the gas cylinder and the vaporizing device.
3. The sample injection apparatus for a gas chromatograph of claim 1, wherein the gas carrier tube is connected to an upper end of the sample processing chamber, and the gas carrier tube is in communication with the gas inlet chamber.
4. The sample injection apparatus for a gas chromatograph according to claim 1, wherein the top end and the bottom end of the high temperature sealing member are respectively provided with an upper clamping block and a lower clamping block, the top end and the bottom end at the center of the cover body are provided with an upper clamping groove and a lower clamping groove, the upper clamping block is clamped into the upper clamping groove, and the lower clamping block is clamped into the lower clamping groove.
5. The sample feeding device for gas chromatograph according to claim 1, wherein a circular stopper is disposed in the sample chamber, a gasket is disposed between the stopper and the high temperature sealing member, and a protrusion is disposed on an outer wall of the connecting pipe below the gasket.
6. The sample injection device for a gas chromatograph according to claim 1, wherein the air inlet pipe is connected to the connecting pipe, an electric heating belt is wound around the outer wall of the air inlet pipe and the outer wall of the filter, a thermocouple is arranged between the electric heating belt and the air inlet pipe, and both the electric heating belt and the thermocouple are connected to a temperature controller.
7. The sample introduction device for gas chromatograph according to claim 6, wherein the gas outlet pipe is further connected to the detection chromatograph, and the gas outlet pipe is also wound around the electric heating belt.
8. The sample injection device for a gas chromatograph according to claim 7, wherein a water bottle is connected to an outlet end of the gas outlet pipe, the water bottle is further connected to an exhaust pipe, an outlet of the gas outlet pipe is located below a liquid level in the water bottle, and an inlet of the exhaust pipe is located above the liquid level in the water bottle.
9. The sample injection device for a gas chromatograph according to claim 1, wherein a bypass pipe is connected between the carrier gas pipe and the gas inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480394.XU CN210690501U (en) | 2019-09-06 | 2019-09-06 | Sample introduction device of gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480394.XU CN210690501U (en) | 2019-09-06 | 2019-09-06 | Sample introduction device of gas chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210690501U true CN210690501U (en) | 2020-06-05 |
Family
ID=70900846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921480394.XU Active CN210690501U (en) | 2019-09-06 | 2019-09-06 | Sample introduction device of gas chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210690501U (en) |
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2019
- 2019-09-06 CN CN201921480394.XU patent/CN210690501U/en active Active
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