CN108152433B - Gas chromatograph high temperature sampling device and gas chromatograph who has it - Google Patents
Gas chromatograph high temperature sampling device and gas chromatograph who has it Download PDFInfo
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- CN108152433B CN108152433B CN201711439283.XA CN201711439283A CN108152433B CN 108152433 B CN108152433 B CN 108152433B CN 201711439283 A CN201711439283 A CN 201711439283A CN 108152433 B CN108152433 B CN 108152433B
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- gas chromatograph
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
Abstract
The invention provides a high-temperature sample introduction device of a gas chromatograph and the gas chromatograph with the same, wherein the high-temperature sample introduction device of the gas chromatograph comprises: the device comprises a shell, a first cavity and a second cavity are defined in the shell and are arranged at intervals, two ends of the first cavity are closed, one end of the second cavity is opened, and the other end of the second cavity is closed; the first heat conducting piece is arranged in the first cavity and provided with a guide pin hole; the second heat conducting piece is arranged between the first cavity and the second cavity; the first heat insulation layer is arranged on the inner wall of the second chamber; and the heating member is arranged above the opening of the second chamber. According to the high-temperature sample introduction device of the gas chromatograph, disclosed by the embodiment of the invention, by utilizing the structure of combining the first cavity, the second cavity, the first heat-conducting piece and the second heat-conducting piece, a high-melting-point sample can be effectively prevented from being solidified in the sample introduction needle in the sample introduction process, and the analysis precision is improved.
Description
Technical Field
The invention relates to the technical field of gas chromatographs, in particular to a high-temperature sample injection device of a gas chromatograph and the gas chromatograph with the high-temperature sample injection device of the gas chromatograph.
Background
A gas chromatograph is usually used in the gas detection process, and some high-melting-point samples are solidified in a sample injection needle in the sample injection process, so that the analysis precision is reduced, the samples are not easy to clean, and the drugs are wasted. The high-temperature sampling device of the existing gas chromatograph usually adopts a metal heating block to directly heat, directly transmits heat to a guide pin hole, and has the defects that the temperature is difficult to control, the heating temperature is uneven, and the potential damage threat exists on a sampling needle.
Disclosure of Invention
In view of the above, the present invention provides a high temperature sample injection device for a gas chromatograph.
The invention also provides a gas chromatograph with the high-temperature sample injection device of the gas chromatograph.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to the embodiment of the first aspect of the invention, the high-temperature sample injection device for the gas chromatograph comprises: the device comprises a shell, a first cavity and a second cavity are defined in the shell and are arranged at intervals, two ends of the first cavity are closed, one end of the second cavity is opened, and the other end of the second cavity is closed; the first heat conducting piece is arranged in the first cavity and provided with a guide pin hole; a second heat transfer member disposed between the first chamber and the second chamber; the first heat insulation layer is arranged on the inner wall of the second chamber; a heating member disposed above the opening of the second chamber.
Further, the heating member includes: the heating device comprises a metal block, wherein at least one heating pipe is arranged in the metal block.
Furthermore, the metal block is formed into a ring-shaped member, a plurality of grooves are formed in the metal block and are arranged at equal intervals, openings of the grooves are formed towards one side far away from the second cavity, the heating pipe is arranged between every two adjacent grooves, a first through hole is formed in the bottom wall of each groove, a second heat insulation layer is arranged at one end, facing the second cavity, of the metal block, and the second heat insulation layer is arranged below the heating pipe.
Further, the heating element further includes: the third heat insulation layer is formed into a ring-shaped piece, the third heat insulation layer is arranged at the opening of the second cavity and is positioned below the heating element, and a plurality of second through holes penetrating through the third heat insulation layer in the thickness direction of the third heat insulation layer are formed in the third heat insulation layer.
Further, the second through hole is provided spaced apart from the heating pipe.
Further, a fourth heat insulation layer is arranged above the heating element.
Further, the high temperature sample injection device of the gas chromatograph further comprises: and the air exhaust device is arranged at the opening of the second chamber.
Further, the inner wall of the second heat-conducting member is provided with threads.
Further, the outer wall of the second heat-conducting member is provided with threads.
The gas chromatograph according to the second aspect of the embodiment of the invention comprises the high-temperature sample injection device of the gas chromatograph according to the embodiment.
The technical scheme of the invention has the following beneficial effects:
according to the high-temperature sample introduction device of the gas chromatograph, the device combining the first heat conduction piece, the second heat conduction piece and the heating piece is adopted, so that the guide pin hole is heated, a high-melting-point sample is effectively prevented from being solidified in the sample introduction needle in the sample introduction process, and the analysis precision is improved.
Drawings
FIG. 1 is a cross-sectional view of a high temperature sample injection device of a gas chromatograph according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a high temperature sample injection device of a gas chromatograph according to yet another embodiment of the present invention;
fig. 3 is a partial structural schematic diagram of fig. 2.
Reference numerals:
a gas chromatograph high-temperature sample introduction device 100;
a housing 10; a first chamber 11; a second chamber 12; a guide pin hole 13;
a first heat-conductive member 20; a second heat-conductive member 30; a first insulating layer 40;
a heating member 50; a metal block 51; a second insulating layer 52; a third insulating layer 53; a fourth insulation layer 54; a through hole 55; a groove 56.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
First, the high temperature sample injection device 100 of the gas chromatograph according to the embodiment of the present invention will be described in detail with reference to the drawings.
As shown in fig. 1 to 3, a high temperature sample injection device 100 for a gas chromatograph according to an embodiment of the present invention includes: a housing 10, a first thermal-conductive member 20, a second thermal-conductive member 30, a first insulating layer 40, and a heating member 50.
Specifically, a first chamber 11 and a second chamber 12 are defined in the housing 10, the first chamber 11 and the second chamber 12 are spaced apart from each other, two ends of the first chamber 11 are closed, one end of the second chamber 12 is open, the other end of the second chamber 12 is closed, the first heat conduction member 20 is disposed in the first chamber 11, the first heat conduction member 20 is provided with a pin hole 13, the second heat conduction member 30 is disposed between the first chamber 11 and the second chamber 12, the first thermal insulation layer 40 is disposed on an inner wall of the second chamber 12, and the heating member 50 is disposed above the opening of the second chamber 12.
In other words, according to the high temperature sample injection device 100 for a gas chromatograph in an embodiment of the present invention, a first chamber 11 and a second chamber 12 are defined in a housing 10, the first chamber 11 and the second chamber 12 are disposed at a distance, a first heat conducting member 20 is disposed in the first chamber 11, a guide pin hole 13 is disposed on the first heat conducting member 20, sample injection can be achieved through the guide pin hole 13, the first chamber 11 and the second chamber 12 are formed in the housing 10 through a second heat conducting member 30, a heating member 50 is disposed above an opening of the second chamber 12 to achieve heating, heat enters the first chamber 11 through the second chamber 12 and the second heat conducting member 30, and heats the guide pin hole 13 through the first heat conducting member 20, and in order to prevent heat loss and damage of heat to other components of the gas chromatograph, a first thermal insulation layer 40 is disposed on an inner wall of the second chamber 12.
It should be noted that the second chamber 12 may be provided with heat insulation cotton to prevent heat dissipation and improve heat insulation effect.
Therefore, according to the high-temperature sample injection device 100 of the gas chromatograph in the embodiment of the invention, by adopting a device combining the first heat conduction member 20, the second heat conduction member 30, the first heat insulation layer 40 and the heating member 50, heat is provided by the heating member 50, and heat is transferred through the first heat conduction member 20 and the second heat conduction member 30, so that the heating of the guide pin hole 13 is realized, a high-melting-point sample is prevented from being solidified in the sample injection needle in the sample injection process, and the analysis accuracy is improved by improving the uniformity of heat.
According to an embodiment of the present invention, the heating member 50 includes: a metal block 51.
Specifically, at least one heating tube is provided within the metal block 51 to effect heating. It should be noted that the high-temperature sample introduction device 100 of the gas chromatograph according to the embodiment of the present invention may further include a temperature sensor, a control system, and a display screen, where the temperature sensor is connected to the control system and the display screen, and the number of the temperature sensors may be multiple, and the temperature sensors may be connected to the heating element 50, and may also be disposed in the first chamber 11 and/or the second chamber 12, so that the temperature may be rapidly adjusted, and the analysis accuracy and the repeatability may be improved.
According to an embodiment of the present invention, the metal block 51 may be formed as a ring-shaped member, the metal block 51 is disposed above the opening of the second chamber 12, the center line of the first chamber 11 and the center line of the metal block 51 may be located on a straight line, the metal block 51 may be provided with a plurality of grooves 56 arranged at intervals, the openings of the grooves 56 are opened toward a side away from the second chamber 12, a heating pipe is disposed between adjacent grooves 56, the bottom wall of the groove 56 is provided with a through hole 55, and one end of the metal block 51 facing the second chamber 12 is provided with a second heat insulation layer 52, specifically, the second heat insulation layer 52 is disposed below the heating pipe.
According to yet another embodiment of the present invention, the heating member 50 further includes: a third insulating layer 53.
Specifically, the third heat insulation layer 53 may be formed as a ring, the third heat insulation layer 53 may be disposed at an opening of the second chamber 12 and below the heating member 50, and a plurality of through holes 55 penetrating in a thickness direction of the third heat insulation layer 53 are provided, and heat enters the second chamber 12 through the through holes 55.
Optionally, the through hole 55 is arranged spaced apart from the heating tube.
According to one embodiment of the invention, a fourth layer of insulation 54 may be provided over the heating element 50.
In some embodiments of the present invention, the high temperature sample injection device 100 of the gas chromatograph further comprises: the air extracting device can be arranged at the opening of the second chamber 12, and the hot air can be conveyed into the second chamber 12 through the through hole 55 by the air extracting device.
According to one embodiment of the invention, the inner wall of the second heat-conducting member 30 is provided with a screw thread.
Further, the outer wall of the second heat-conducting member 30 is provided with threads, and it should be noted that, the pitch of the threads on the inner wall of the second heat-conducting member 30 and/or the outer wall of the second heat-conducting member 30 is gradually decreased from one end of the second chamber 12 to the other end of the second chamber 12.
In summary, according to the high-temperature sample injection device 100 of the gas chromatograph in the embodiment of the present invention, the temperature can be effectively and rapidly adjusted, and the high melting point sample is prevented from being solidified in the sample injection needle during the sample injection process, so that the analysis accuracy and the repeatability are improved.
The gas chromatograph according to the second aspect of the present invention includes the gas chromatograph high temperature sample injection device 100 according to the above-mentioned embodiment, and since the gas chromatograph high temperature sample injection device 100 according to the embodiment of the present invention has the above-mentioned technical effects, the gas chromatograph according to the embodiment of the present invention also has the corresponding technical effects, that is, the high melting point sample can be effectively prevented from being solidified in the injection needle during the injection process, so that the analysis accuracy is improved.
Other structures and operations of the gas chromatograph according to embodiments of the present invention are understood and readily implemented by those skilled in the art, and therefore will not be described in detail. While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a gas chromatograph high temperature sampling device which characterized in that includes:
the device comprises a shell, a first cavity and a second cavity are defined in the shell and are arranged at intervals, two ends of the first cavity are closed, one end of the second cavity is opened, and the other end of the second cavity is closed;
the first heat conducting piece is arranged in the first cavity and provided with a guide pin hole;
a second heat transfer member disposed between the first chamber and the second chamber;
the first heat insulation layer is arranged on the inner wall of the second chamber;
a heating member disposed over the opening of the second chamber;
the heating member includes: the heating device comprises a metal block, wherein at least one heating pipe is arranged in the metal block;
the metal block is formed into a ring-shaped piece, a plurality of grooves which are arranged at equal intervals are formed in the metal block, the opening of each groove is opened towards one side far away from the second cavity, the heating pipe is arranged between every two adjacent grooves, a first through hole is formed in the bottom wall of each groove, a second heat insulation layer is arranged at one end, facing the second cavity, of the metal block, and the second heat insulation layer is arranged below the heating pipe.
2. The high temperature sample introduction device for a gas chromatograph of claim 1, wherein the heating element further comprises:
the third heat insulation layer is formed into a ring-shaped piece, the third heat insulation layer is arranged at the opening of the second cavity and is positioned below the heating element, and a plurality of second through holes penetrating through the third heat insulation layer in the thickness direction of the third heat insulation layer are formed in the third heat insulation layer.
3. The high temperature sample introduction device for gas chromatograph of claim 2, wherein the second through hole is spaced apart from the heating tube.
4. The high temperature sample introduction device for a gas chromatograph according to claim 3, wherein a fourth heat insulation layer is disposed above the heating member.
5. The high temperature sample introduction device for a gas chromatograph of claim 1, further comprising:
and the air exhaust device is arranged at the opening of the second chamber.
6. The high temperature sample introduction device for gas chromatograph of claim 1, wherein an inner wall of the second heat conducting member is threaded.
7. The high temperature sample introduction device for gas chromatograph of claim 6, wherein an outer wall of the second heat conducting member is threaded.
8. A gas chromatograph comprising the high temperature sample injection apparatus of a gas chromatograph according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711439283.XA CN108152433B (en) | 2017-12-25 | 2017-12-25 | Gas chromatograph high temperature sampling device and gas chromatograph who has it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711439283.XA CN108152433B (en) | 2017-12-25 | 2017-12-25 | Gas chromatograph high temperature sampling device and gas chromatograph who has it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108152433A CN108152433A (en) | 2018-06-12 |
| CN108152433B true CN108152433B (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711439283.XA Active CN108152433B (en) | 2017-12-25 | 2017-12-25 | Gas chromatograph high temperature sampling device and gas chromatograph who has it |
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| Country | Link |
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| CN (1) | CN108152433B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089935U (en) * | 1991-05-31 | 1991-12-04 | 洛阳有色金属加工设计研究院 | Aluminium melt refining device |
| CN2281538Y (en) * | 1997-02-17 | 1998-05-13 | 北京市北分仪器工艺技术公司 | Gas chromatographic sample filler |
| CN2814247Y (en) * | 2005-06-30 | 2006-09-06 | 黄永年 | Electric fluid heating device |
| CN102706382A (en) * | 2012-04-28 | 2012-10-03 | 深圳大学 | Incubator |
| CN203117185U (en) * | 2013-02-19 | 2013-08-07 | 北京伊士通新材料发展有限公司 | Container for detecting gas |
| CN205941483U (en) * | 2016-08-24 | 2017-02-08 | 东莞市杉杉电池材料有限公司 | Gas chromatograph high temperature sampling device |
| CN206096048U (en) * | 2016-10-11 | 2017-04-12 | 云南环绿环境检测技术有限公司 | Gas chromatograph |
| CN206258324U (en) * | 2016-11-18 | 2017-06-16 | 盐城工学院 | A kind of heater and heating monitoring device |
-
2017
- 2017-12-25 CN CN201711439283.XA patent/CN108152433B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089935U (en) * | 1991-05-31 | 1991-12-04 | 洛阳有色金属加工设计研究院 | Aluminium melt refining device |
| CN2281538Y (en) * | 1997-02-17 | 1998-05-13 | 北京市北分仪器工艺技术公司 | Gas chromatographic sample filler |
| CN2814247Y (en) * | 2005-06-30 | 2006-09-06 | 黄永年 | Electric fluid heating device |
| CN102706382A (en) * | 2012-04-28 | 2012-10-03 | 深圳大学 | Incubator |
| CN203117185U (en) * | 2013-02-19 | 2013-08-07 | 北京伊士通新材料发展有限公司 | Container for detecting gas |
| CN205941483U (en) * | 2016-08-24 | 2017-02-08 | 东莞市杉杉电池材料有限公司 | Gas chromatograph high temperature sampling device |
| CN206096048U (en) * | 2016-10-11 | 2017-04-12 | 云南环绿环境检测技术有限公司 | Gas chromatograph |
| CN206258324U (en) * | 2016-11-18 | 2017-06-16 | 盐城工学院 | A kind of heater and heating monitoring device |
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| CN108152433A (en) | 2018-06-12 |
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Effective date of registration: 20200819 Address after: Room 333 (3 / F), building 1, No. 11, Deshengmenwai street, Xicheng District, Beijing 100120 Applicant after: BEIJING GAO MAI KE INSTRUMENT S & T Co.,Ltd. Address before: 528200 3A, No. seven, No. 97, South Nanhai District, Nanhai District, Foshan, Guangdong Province, South Nanhai Road, north of the South China Sea Avenue, No. seven Applicant before: FOSHAN ZHONGHUAN ENVIRONMENTAL TESTING CENTER |
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