CN202013344U - Thermal conductivity detector - Google Patents
Thermal conductivity detector Download PDFInfo
- Publication number
- CN202013344U CN202013344U CN2011200677574U CN201120067757U CN202013344U CN 202013344 U CN202013344 U CN 202013344U CN 2011200677574 U CN2011200677574 U CN 2011200677574U CN 201120067757 U CN201120067757 U CN 201120067757U CN 202013344 U CN202013344 U CN 202013344U
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- thermal conductivity
- housing
- conductivity detector
- detection cell
- utility
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Abstract
The utility model discloses a thermal conductivity detector which comprises a shell body, a detection pool arranged inside the shell body and a hot top fixedly connected above the shell body, wherein the shell body is filled with thermal insulation material which is wrapped on the detection pool, air inlets and air outlets are respectively communicated with the detection pool and are arranged all around the shell body, the hot top is composed of a top shell and a thermal insulation material filled inside the top shell, and the top shell is in a double-layer vacuum structure. The utility model has the advantage that the thermal conductivity detector is not affected by the change of the external environment temperature, thereby guaranteeing the stability and the accuracy of the detecting result.
Description
Technical field
The utility model belongs to the gas chromatographic detection Instrument technology field, relates in particular to a kind of thermal conductivity detector (TCD).
Background technology
Thermal conductivity detector (TCD) is the most frequently used a kind of detecting device of vapor-phase chromatography.In order to guarantee detection accuracy, must guarantee that detection cell is not disturbed by ambient temperature, existing for this reason thermal conductivity detector (TCD) is installed in detection cell in the housing of fill insulant material usually, and a side that contacts with the external world is provided with hot top, and this hot top is made of cap shell and the insulation material that is filled in the cap shell.This hot top has been arranged, reduced the influence of ambient temperature detection cell.But, find that in actual application the variation of ambient temperature still can impact detection cell more or less, for example the switching of air-conditioning or fan is and causes Monitoring Data that certain fluctuation is arranged.By analysis, this is main because hot top has been made an entity, and the variation meeting of ambient temperature passes to detection cell with conduction pattern, thereby has influenced the stability and the accuracy of testing result.
The utility model content
Technical problem to be solved in the utility model provides a kind of thermal conductivity detector (TCD) that is not subjected to the ambient temperature variable effect, to overcome the defective that prior art exists.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of thermal conductivity detector (TCD), it includes housing, be positioned at the detection cell of housing, be fixedly connected on the hot top of housing top, be filled with the insulation material that wraps detection cell in the described housing, also have air intake opening and the gas outlet that is communicated with detection cell around the described housing respectively, described hot top is made of cap shell and the insulation material that is filled in the cap shell, and it is characterized in that: described cap shell is the double-layer vacuum structure.
In the utility model, the cap shell is designed to the double-layer vacuum structure, intercepted the conduction of temperature, even make that just ambient temperature changes, this temperature variation also can not be delivered to the detection cell of enclosure interior by the cap shell of vacuum structure, thereby guaranteed that detection cell is in the testing environment of a constant temperature all the time, and then guaranteed the stable and accurate of detection cell testing result.Therefore, the utlity model has the advantage that is not subjected to the ambient temperature variable effect.
Description of drawings
Be elaborated below in conjunction with the drawings and specific embodiments the utility model:
The outer inner structure synoptic diagram of the present utility model of Fig. 1;
Fig. 2 is an external structure stereographic map of the present utility model.
Embodiment
As depicted in figs. 1 and 2, thermal conductivity detector (TCD) of the present utility model comprises housing 100, detection cell 200, hot top 300.
Wherein, housing 100 is a square structure, detection cell 200 is installed in the housing 100, is filled with the insulation material (not shown) in housing 100, and it is the testing environment that detection cell 200 is created a constant temperature as the first road insulation measure that insulation material wraps detection cell 200.Have two gas outlets 101 respectively in the left and right sides of housing 100, have two air intake openings 102 in the bottom of housing 100, these air intake openings 102,101 equal communication with detection ponds 200, gas outlet.
In actual application, housing 100 and detection cell 200 are to be embedded in the equipment, and top one side need be positioned at outside the equipment, in order further to have avoided the influence of ambient temperature to detection cell 200, connects the hot top 300 of a circle in the upper fixed of housing 100.This hot top 300 is made of cap shell 301 and the insulation material (also not shown among the figure) that is filled in the cap shell 301, and wherein in the utility model, cap shell 301 is the double-layer vacuum structure.After being provided with hot top 300, insulation material in it can play further insulation effect to detection cell, more crucial is, by cap shell 301 is designed to the double-layer vacuum structure, the conduction that has completely cut off temperature, even ambient temperature changes to some extent, this variation can not be transmitted on the detection cell 200 of housing 100 inside yet.Find through aim at this thermal conductivity detector (TCD) check with a fan, detect data and do not fluctuate.
Therefore, in sum, thermal conductivity detector (TCD) of the present utility model has the advantage that is not subjected to the ambient temperature variable effect, thereby has guaranteed the stable and accurate of testing result.
But, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (1)
1. thermal conductivity detector (TCD), it includes housing, be positioned at the detection cell of housing, be fixedly connected on the hot top of housing top, be filled with the insulation material that wraps detection cell in the described housing, also have air intake opening and the gas outlet that is communicated with detection cell around the described housing respectively, described hot top is made of cap shell and the insulation material that is filled in the cap shell, and it is characterized in that: described cap shell is the double-layer vacuum structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200677574U CN202013344U (en) | 2011-03-15 | 2011-03-15 | Thermal conductivity detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200677574U CN202013344U (en) | 2011-03-15 | 2011-03-15 | Thermal conductivity detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202013344U true CN202013344U (en) | 2011-10-19 |
Family
ID=44783961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200677574U Expired - Lifetime CN202013344U (en) | 2011-03-15 | 2011-03-15 | Thermal conductivity detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202013344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512916A (en) * | 2012-06-29 | 2014-01-15 | 重庆凌卡分析仪器有限公司 | High-stability thermal conductance type gas sensor |
| CN104828771A (en) * | 2015-03-16 | 2015-08-12 | 中国科学院电子学研究所 | Micro thermal conductivity detector with integrated filtering structure and manufacturing method |
-
2011
- 2011-03-15 CN CN2011200677574U patent/CN202013344U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512916A (en) * | 2012-06-29 | 2014-01-15 | 重庆凌卡分析仪器有限公司 | High-stability thermal conductance type gas sensor |
| CN103512916B (en) * | 2012-06-29 | 2016-02-17 | 重庆凌卡分析仪器有限公司 | A kind of high stable thermal conductivity gas sensor |
| CN104828771A (en) * | 2015-03-16 | 2015-08-12 | 中国科学院电子学研究所 | Micro thermal conductivity detector with integrated filtering structure and manufacturing method |
| CN104828771B (en) * | 2015-03-16 | 2016-05-11 | 中国科学院电子学研究所 | A kind of miniature thermal conductivity detector (TCD) and preparation method of integrated filtration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111019 |