CN211348070U

CN211348070U - High-precision gas chromatograph

Info

Publication number: CN211348070U
Application number: CN201922260716.6U
Authority: CN
Inventors: 吴卫; 竭友; 李佳佳
Original assignee: Farmach Tianjin Pharmaceutical Technology Co ltd
Current assignee: Tianjin Haoyi Pharmaceutical Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-25
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a high accuracy gas chromatograph, including box and intake pipe, one side below of box is provided with the intake pipe, the intake pipe is kept away from the fixed intercommunication of one end of box and is had the carrier gas source, the one end that the intake pipe is close to the box outside is provided with the relief pressure valve, the one end that is close to the box of intake pipe passes box fixedly connected with carrier gas drying tube, the first connecting pipe of one end fixedly connected with of intake pipe is kept away from to the carrier gas drying tube, the one end fixedly connected with gas flow rate controller of carrier gas drying tube is kept away from to first connecting pipe, the one end fixedly connected with second connecting pipe of first connecting pipe is kept away from to the gas flow rate controller, the one end fixedly connected with vaporizer of gas flow rate controller is. The utility model discloses in, accessible microcomputer real time control is by the gasification of the different components of detected thing and the temperature when gas separation, prevents to appear the phenomenon of desublimation and lead to the inaccurate phenomenon of measuring result by the detected thing, has improved the detection precision of device.

Description

High-precision gas chromatograph

Technical Field

The utility model relates to a chromatograph technical field especially relates to a high accuracy gas chromatograph.

Background

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. Can be used for analyzing heat-stable organic matters with boiling point not more than 500 ℃ in soil, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like

However, the current gas chromatograph generally has poor temperature control, and the measurement accuracy is not high when measuring some complex mixtures.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a high-precision gas chromatograph.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a high-precision gas chromatograph comprises a box body and an air inlet pipe, wherein the air inlet pipe is arranged below one side of the box body, one end, far away from the box body, of the air inlet pipe is fixedly communicated with a carrier gas source, one end, near the outer side of the box body, of the air inlet pipe is provided with a pressure reducing valve, one end, near the box body, of the air inlet pipe penetrates through a carrier gas drying pipe fixedly connected with the box body, one end, far away from the air inlet pipe, of the carrier gas drying pipe is fixedly connected with a first connecting pipe, one end, far away from the carrier gas drying pipe, of the first connecting pipe is fixedly connected with a gas flow rate controller, one end, far away from the first connecting pipe, of the second connecting pipe is fixedly connected with a gasification chamber, a sample inlet pipe is arranged above one end, near the second connecting pipe, of the gasification, the one end fixedly connected with third connecting pipe of second connecting pipe is kept away from to the vaporizer, the inside below fixedly connected with accuse temperature case of box, the third connecting pipe passes accuse temperature case fixedly connected with annular chromatographic column, the inboard of annular chromatographic column is provided with accuse temperature post, the gas outlet of annular chromatographic column passes accuse temperature case fixedly connected with insulating tube, the fixed intercommunication of one end that accuse temperature case was kept away from to the insulating tube has the detector, the one end fixedly connected with blast pipe of insulating tube is kept away from to the detector, the box is kept away from intake pipe place one side below and is provided with the computer, the computer top is provided with the keyboard, the computer top is provided with the display in keyboard one side.

As a further description of the above technical solution:

the vaporizer includes inner tube and zone of heating, the outside of inner tube is provided with the zone of heating, the zone of heating outside is provided with the insulating layer, one side that the inside below of inner tube is close to the third connecting pipe is provided with vaporizer temperature sensor.

As a further description of the above technical solution:

one end of the sampling pipe close to the gasification chamber is communicated with the inner pipe of the gasification chamber.

As a further description of the above technical solution:

and a temperature control box temperature sensor is arranged on one side of the temperature control box below the annular chromatographic column.

As a further description of the above technical solution:

and the middle part of the sampling pipe is provided with a one-way valve.

As a further description of the above technical solution:

the gas flow rate controller, the gasification chamber, the temperature control column, the temperature control box temperature sensor, the detector, the keyboard and the display are all connected with the microcomputer in an electric control mode.

The utility model discloses following beneficial effect has:

1. the utility model discloses accessible microcomputer real time control is by the temperature when the gasification of the different components of detected thing and gas separation, appears to appear being detected the thing and appearing the phenomenon of desublimation and leading to the inaccurate phenomenon of measuring result, has improved the detection precision of device.

2. The utility model discloses be provided with the carrier gas drying tube, can purify and dry the carrier gas, improve the purity of carrier gas, prevented because the impure coarse condition that leads to the measuring result of carrier gas, improved the measurement accuracy of device.

3. The utility model discloses be provided with gas flow rate controller, the cooperation relief pressure valve has guaranteed that the pressure and the velocity of flow of carrier gas are stable, has improved the detection precision of device.

Drawings

Fig. 1 is a front cross-sectional view of a high-precision gas chromatograph according to the present invention;

fig. 2 is a top view of a high-precision gas chromatograph according to the present invention;

fig. 3 is a schematic view of the internal structure of the gasification chamber according to the present invention.

Illustration of the drawings:

1. a box body; 2. an air inlet pipe; 3. a pressure reducing valve; 4. a carrier gas drying tube; 5. a carrier gas source; 6. a first connecting pipe; 7. a gas flow rate controller; 8. a second connecting pipe; 9. a gasification chamber; 10. a sample injector; 11. A sample inlet pipe; 12. a one-way valve; 13. a third connecting pipe; 14. a temperature control box; 15. an annular chromatography column; 16. A temperature control column; 17. a temperature control box temperature sensor; 18. a heat preservation pipe; 19. a detector; 20. an exhaust pipe; 21. a microcomputer; 22. a keyboard; 23. a display; 901. an inner tube; 902. a heating layer; 903. a thermal insulation layer; 904. a gasification chamber temperature sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides an embodiment: a high-precision gas chromatograph comprises a box body 1 and an air inlet pipe 2, wherein the air inlet pipe 2 is arranged below one side of the box body 1, one end, far away from the box body 1, of the air inlet pipe 2 is fixedly communicated with a carrier gas source 5 for providing carrier gas, one end, near the outer side of the box body 1, of the air inlet pipe 2 is provided with a pressure reducing valve 3 for reducing pressure, one end, near the box body 1, of the air inlet pipe 2 penetrates through a carrier gas drying pipe 4 fixedly connected with the box body 1 for purifying and drying the carrier gas, one end, far away from the air inlet pipe 2, of the carrier gas drying pipe 4 is fixedly connected with a first connecting pipe 6, one end, far away from the carrier gas drying pipe 4, of the first connecting pipe 6 is fixedly connected with a gas flow rate controller 7 for controlling the flow rate and pressure of the carrier gas, one end, far away from the first connecting, a sample feeding pipe 11 is arranged above one end of the gasification chamber 9 close to the second connecting pipe 8, one end of the sample feeding pipe 11 far away from the gasification chamber 9 is fixedly communicated with a sample injector 10, one end of the gasification chamber 9 far away from the second connecting pipe 8 is fixedly connected with a third connecting pipe 13, a temperature control box 14 is fixedly connected with the lower part in the box body 1 and used for keeping the temperature of an annular chromatographic column 15 and preventing the measured sample from desublimation, the third connecting pipe 13 passes through the temperature control box 14 and is fixedly connected with the annular chromatographic column 15, a temperature control column 16 is arranged on the inner side of the annular chromatographic column 15 and used for controlling the temperature of the detected sample, a heat preservation pipe 18 is fixedly connected with the temperature control box 14 through the gas outlet of the annular chromatographic column 15, a detector 19 is fixedly communicated with one end of the heat preservation pipe 18 far away from the temperature control box 14 and used for detecting the sample data, an exhaust pipe 20 is fixedly connected with one end of the detector 19 far away from the, a keyboard 22 is provided above the microcomputer 21 for inputting data, and a display 23 is provided above the microcomputer 21 on the side of the keyboard 22.

The gasification chamber 9 comprises an inner tube 901 and a heating layer 902, the outer side of the inner tube 901 is provided with the heating layer 902, the outer side of the heating layer 902 is provided with a heat insulation layer 903, one side of the lower part of the inner tube 901 close to a third connecting tube 13 is provided with a gasification chamber temperature sensor 904, one end of a sample inlet tube 11 close to the gasification chamber 9 is communicated with the inner part of the inner tube 901 of the gasification chamber 9, a temperature control box 14 is provided with a temperature control box temperature sensor 17 at one side of the lower part of an annular chromatographic column 15, the middle part of the sample inlet tube 11 is provided with a one-way valve 12, a gas flow rate controller 7, the gasification chamber 9, a temperature control column 16, the temperature control box temperature sensor 17, a detector 19, a keyboard 22 and a display 23 are all electrically connected with a microcomputer 21, the utility model can control the temperature of gasification and gas separation of different, the detection precision of the device is improved.

The working principle is as follows: the utility model discloses during the use, carrier gas in carrier gas source 5 gets into 4 dry purifications of carrier gas drying tube through intake pipe 2 after 3 decompression of relief pressure valve, 7 control flow rate and pressure of rethread first connecting pipe 6 entering gas flow rate controller, rethread second connecting pipe 8 gets into vaporizer 9, sample injector 10 injects the sample into vaporizer 9 through sample inlet pipe 11, it separates through third connecting pipe 13 entering annular chromatographic column 15 along with the carrier gas after 9 gasifications by vaporizer again, it detects to get into detector 19 through insulating tube 18 afterwards, the detector will detect data and send for microcomputer 21, show from display screen 23 after data analysis.

Finally, it should be noted that: 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 and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a high accuracy gas chromatograph, includes box (1) and intake pipe (2), its characterized in that: an air inlet pipe (2) is arranged below one side of the box body (1), one end, far away from the box body (1), of the air inlet pipe (2) is fixedly communicated with a carrier gas source (5), one end, close to the outer side of the box body (1), of the air inlet pipe (2) is provided with a pressure reducing valve (3), one end, close to the box body (1), of the air inlet pipe (2) penetrates through the box body (1) and is fixedly connected with a carrier gas drying pipe (4), one end, far away from the air inlet pipe (2), of the carrier gas drying pipe (4) of the air inlet pipe (2, a sample feeding pipe (11) is arranged above one end, close to the second connecting pipe (8), of the gasification chamber (9), a sample injector (10) is fixedly communicated with one end, far away from the gasification chamber (9), of the sample feeding pipe (11), a third connecting pipe (13) is fixedly connected with one end, far away from the second connecting pipe (8), of the gasification chamber (9), a temperature control box (14) is fixedly connected with the inner lower part of the box body (1), the third connecting pipe (13) penetrates through the temperature control box (14) and is fixedly connected with an annular chromatographic column (15), a temperature control column (16) is arranged on the inner side of the annular chromatographic column (15), a heat insulation pipe (18) is fixedly connected with an air outlet of the annular chromatographic column (15) and penetrates through the temperature control box (14), a detector (19) is fixedly communicated with one end, far away from the temperature control box (14), of the heat insulation pipe (18) and is fixedly connected with an exhaust pipe (20), the air inlet pipe (2) is far away from the box body (1), a microcomputer (21) is arranged below one side of the box body (1), a keyboard (22) is arranged above the microcomputer (21), and a display (23) is arranged on one side of the keyboard (22) above the microcomputer (21).

2. A high accuracy gas chromatograph according to claim 1, wherein: the gasification chamber (9) comprises an inner pipe (901) and a heating layer (902), the heating layer (902) is arranged on the outer side of the inner pipe (901), a heat insulation layer (903) is arranged on the outer side of the heating layer (902), and a gasification chamber temperature sensor (904) is arranged on one side, close to the third connecting pipe (13), of the lower portion of the inner part of the inner pipe (901).

3. A high accuracy gas chromatograph according to claim 1, wherein: one end of the sampling pipe (11) close to the gasification chamber (9) is communicated with the inside of an inner pipe (901) of the gasification chamber (9).

4. A high accuracy gas chromatograph according to claim 1, wherein: and a temperature control box temperature sensor (17) is arranged on one side of the temperature control box (14) below the annular chromatographic column (15).

5. A high accuracy gas chromatograph according to claim 1, wherein: the middle part of the sampling pipe (11) is provided with a one-way valve (12).

6. A high accuracy gas chromatograph according to claim 1, wherein: the gas flow rate controller (7), the gasification chamber (9), the temperature control column (16), the temperature control box temperature sensor (17), the detector (19), the keyboard (22) and the display (23) are all in electric control connection with the microcomputer (21).