CN107024502A - A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow - Google Patents
A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow Download PDFInfo
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- CN107024502A CN107024502A CN201610068617.6A CN201610068617A CN107024502A CN 107024502 A CN107024502 A CN 107024502A CN 201610068617 A CN201610068617 A CN 201610068617A CN 107024502 A CN107024502 A CN 107024502A
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- Prior art keywords
- resistance
- efferent duct
- coiled pipe
- concatenation
- respectively equipped
- Prior art date
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- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 description 8
- 239000012159 carrier gas Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow.The positive and negative electrode of working power, which connects to be provided with the metal base that zero-regulator resistor is connected with metal base two respectively, is respectively equipped with heater resistance, left efferent duct, right efferent duct are respectively equipped with the upside of two metal bases, left coiled pipe and right coiled pipe are respectively fixed with the downside of two metal bases, fixed resistance, zero-regulator resistor, the side a and b connection of fixed resistance difference power supply output after concatenation, the heater resistance of concatenation is respectively equipped with two metal bases, the side a and b that the heater resistance end of concatenation is exported with power supply respectively is connected.Compared with prior art：The original cost using device can be significantly less than in cost by introducing the heated filament of new technology, and because the application of coil can substantially reduce disturbance of the original air-flow to heated filament, reduce the spoilage of heated filament.
Description
Technical field
A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow of the present invention, the diffusible hydrogen being related to point
Technical field is analysed, the detection of trace gas constituent content can be detected in the environment of relative loose
Device.
Background technology
Current conductance cell is mostly using thermistor as detection unit, and it is narrow to there is detection range,
Poor linearity and big etc. not enough by external environment influence, at the same parts it is expensive etc. it is unfavorable because
Element, deposits and wants to bring certain unfavorable factor to promoting the use of a large area, particularly trace member
The detection of element, the precision surveyed under low discharge condition is by the defect being greatly affected.
The content of the invention
It is an object of the invention to overcome drawbacks described above, to above-mentioned deficiency, subversive change is made
Enter, not only reduce cost, it is often more important that the technology has been performed into the big stream of ultimate attainment one kind
The low disturbance constant temperature trace thermal conductivity detector (TCD) of amount.
What its technology was realized in：Including fixed resistance, zero-regulator resistor, fixed resistance, heat
Silk resistance, left coiled pipe, right coiled pipe, heater resistance, working voltage source, left efferent duct,
Right efferent duct, metal base, it is characterised in that：The positive and negative electrode of working power connects tune respectively
It is provided with the metal base that zero resistance is connected with metal base two and is respectively equipped with heater resistance, two gold medals
It is respectively equipped with the downside of left efferent duct, right efferent duct, two metal bases and fixes respectively on the upside of category pedestal
There are the fixed resistance after left coiled pipe and right coiled pipe, concatenation, zero-regulator resistor, fixed resistance point
The heated filament electricity of concatenation is respectively equipped with the side a and b connection of other power supply output, two metal bases
Resistance, the side a and b that the heater resistance end of concatenation is exported with power supply respectively is connected.
Implementing obvious advantage and effect after the technology is：Introduce the heated filament meeting of new patented technology
The original cost using device is significantly less than in cost, and because the application of coil can be big
Disturbance of the original air-flow to heated filament is reduced greatly, reduces the spoilage of heated filament.
Brief description of the drawings
Fig. 1 is structural representation of the invention,
Wherein, 1- fixed resistances, 2- zero-regulator resistors, 3- fixed resistances, 4- heater resistances, 5-
The right coiled pipe of left coiled pipe, 6-, 7- heater resistances, 8- working powers, the left efferent ducts of 9-, 10-
Right efferent duct, 11- metal bases.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described：
See accompanying drawing 1, the positive and negative electrode of working power 8 connects zero-regulator resistor 2 and Metal Substrate respectively
Provided with heater resistance 4 is respectively equipped with 11 liang of connected metal bases 11 of seat, electric bridge is constituted,
The upside of two metal base 11 is respectively equipped with left efferent duct 9, right efferent duct 10, two metal bases
11 downside be respectively fixed with the fixed resistance 1 after left coiled pipe 5 and right coiled pipe 6, concatenation,
Zero-regulator resistor 2, the side a and b connection of the difference power supply output of fixed resistance 3, two Metal Substrates
Heater resistance 7 is respectively equipped with seat 11 and heater resistance 4 is concatenated, the heated filament electricity of concatenation
Side a and b of the 7 left heater resistance right-hand members respectively with power supply output is hindered to be connected.
Described heater resistance 7 and heater resistance 4 carry the pottery of wire casing using heat-resisting real core appearance
Porcelain winds around heated filament the structure of its surrounding.
See accompanying drawing 1, during work, receive control system instruction, working power 8 is powered, electric bridge
Work, by bridge balance, has different thermal conductivities based on gas with various, heated filament has electricity
Hinder the characteristic varied with temperature, when there is a constant dc by conductance cell, heater resistance 7
It is heated, the heat that gas is entered in metal base 11 by left coiled pipe 6, right coiled pipe 5
Pond is led, because the conduction of heat of carrier gas makes a part of heat of heated filament by left efferent duct 9, the right side
Efferent duct 10, a part of gas are output, and another part is transmitted to conductance cell.When heated filament is produced
Heat and dissipated heat when reaching balance, hot-wire temperature just stablizes in certain numerical value.Conductance cell
It is maintained within the temperature range of setting；Detector effectively overcomes disturbance of the large flow-rate gas stream to heated filament
And the influence of the additive factor produced；Add simultaneously at entrance (cold conditions) place of carrier gas and sample gas
Enter coiled pipe preheating, control temperature sets temperature identical with system, it is to avoid the temperature difference is influenceed to heated filament
Impact and dew condensation phenomenon generation, not only avoid impact of the cold conditions air-flow to heated filament, more have
Effect improves the accuracy and sensitivity of detection.
After gas is exported by left efferent duct 9, right efferent duct 10, due to carrier gas and to be measured group
Divide the thermal conductivity of binary mixture different with the thermal conductivity of pure carrier gas, heat dispersal situations in measuring cell
Thus change, make to generate difference in reference cell and measuring cell hole between heater resistance value,
Electric bridge disequilibrium, detector has voltage signal output.The concentration of component to be measured is bigger in carrier gas,
Heat conductivity of gas changes more notable in measuring cell, and temperature and resistance value change also more notable, electricity
Press signal stronger.The voltage signal now exported is directly proportional to the concentration of sample, and this is exactly hot
Lead the quantitative basis of detector.Temperature measurement and control system is added in conductance cell simultaneously, if
Pond body is maintained at the temperature of setting after constant temperature degree, it is ensured that temperature it is constant.So as to overcome big stream
Measure the disturbance to heated filament.
Claims (1)
1. a kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow, including fixed resistance, zero-regulator resistor,
Fixed resistance, heater resistance, left coiled pipe, right coiled pipe, heater resistance, working voltage source,
Left efferent duct, right efferent duct, metal base, it is characterised in that：The positive and negative electrode of working power
It is provided with the metal base that connection zero-regulator resistor is connected with metal base two respectively and is respectively equipped with heat
Left efferent duct, right efferent duct, two metal bases are respectively equipped with the upside of silk resistance, two metal bases
Downside be respectively fixed with the fixed resistance after left coiled pipe and right coiled pipe, concatenation, zero-regulator resistor,
String is respectively equipped with the side a and b connection of fixed resistance difference power supply output, two metal bases
The heater resistance connect, the side a and b that the heater resistance end of concatenation is exported with power supply respectively is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610068617.6A CN107024502A (en) | 2016-02-01 | 2016-02-01 | A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610068617.6A CN107024502A (en) | 2016-02-01 | 2016-02-01 | A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107024502A true CN107024502A (en) | 2017-08-08 |
Family
ID=59524861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610068617.6A Pending CN107024502A (en) | 2016-02-01 | 2016-02-01 | A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107024502A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709133A (en) * | 2017-10-25 | 2019-05-03 | 天津市业洪检测技术发展有限公司 | A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow |
| CN117434193A (en) * | 2023-12-20 | 2024-01-23 | 福建省巨颖高能新材料有限公司 | High-sensitivity TCD detector for corrosive gas |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR937257A (en) * | 1946-12-05 | 1948-08-12 | Improvement in gas analysis methods and apparatus for implementing this method | |
| GB872259A (en) * | 1958-10-08 | 1961-07-05 | Perkin Elmer Corp | Improvements relating to gas chromatography |
| FR1349254A (en) * | 1962-11-06 | 1964-01-17 | Leeds & Northrup Co | Fluid analysis device |
| CN1323380A (en) * | 1998-10-16 | 2001-11-21 | 丹尼尔工业公司 | Improved integrated valve design for gas chromatograph |
| CN101813658A (en) * | 2010-03-08 | 2010-08-25 | 北京纳克分析仪器有限公司 | Thermal conductivity detector of a pair of thermal resistors |
| CN201838411U (en) * | 2010-09-30 | 2011-05-18 | 常州市南方电器元件厂有限公司 | Aluminum housed resistor |
| CN102730622A (en) * | 2011-04-01 | 2012-10-17 | 中国科学院电子学研究所 | Integrated chip of micro thermal conductive detector and manufacturing method for same |
| CN203205163U (en) * | 2013-04-24 | 2013-09-18 | 上海德程汇斯电气有限公司 | Brake resistor adopting ceramic casing |
| CN203563216U (en) * | 2013-11-15 | 2014-04-23 | 北京京杰锐思技术开发有限公司 | Anti-corrosion resistance wire heating rod |
| CN205388582U (en) * | 2016-02-01 | 2016-07-20 | 上海景瑞阳实业有限公司 | Large -traffic low disturbance constant temperature trace thermal conductivity detector |
-
2016
- 2016-02-01 CN CN201610068617.6A patent/CN107024502A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR937257A (en) * | 1946-12-05 | 1948-08-12 | Improvement in gas analysis methods and apparatus for implementing this method | |
| GB872259A (en) * | 1958-10-08 | 1961-07-05 | Perkin Elmer Corp | Improvements relating to gas chromatography |
| FR1349254A (en) * | 1962-11-06 | 1964-01-17 | Leeds & Northrup Co | Fluid analysis device |
| CN1323380A (en) * | 1998-10-16 | 2001-11-21 | 丹尼尔工业公司 | Improved integrated valve design for gas chromatograph |
| CN101813658A (en) * | 2010-03-08 | 2010-08-25 | 北京纳克分析仪器有限公司 | Thermal conductivity detector of a pair of thermal resistors |
| CN201838411U (en) * | 2010-09-30 | 2011-05-18 | 常州市南方电器元件厂有限公司 | Aluminum housed resistor |
| CN102730622A (en) * | 2011-04-01 | 2012-10-17 | 中国科学院电子学研究所 | Integrated chip of micro thermal conductive detector and manufacturing method for same |
| CN203205163U (en) * | 2013-04-24 | 2013-09-18 | 上海德程汇斯电气有限公司 | Brake resistor adopting ceramic casing |
| CN203563216U (en) * | 2013-11-15 | 2014-04-23 | 北京京杰锐思技术开发有限公司 | Anti-corrosion resistance wire heating rod |
| CN205388582U (en) * | 2016-02-01 | 2016-07-20 | 上海景瑞阳实业有限公司 | Large -traffic low disturbance constant temperature trace thermal conductivity detector |
Non-Patent Citations (2)
| Title |
|---|
| 刘影等: "气相色谱热导检测器的信号测量与电源电路研究", 《现代仪器》, no. 02, 30 April 2007 (2007-04-30), pages 36 - 38 * |
| 庄稼 等: "测量仪表与自动化", 四川科学技术出版社, pages: 531 - 532 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709133A (en) * | 2017-10-25 | 2019-05-03 | 天津市业洪检测技术发展有限公司 | A kind of low disturbance constant temperature trace thermal conductivity detector (TCD) of big flow |
| CN117434193A (en) * | 2023-12-20 | 2024-01-23 | 福建省巨颖高能新材料有限公司 | High-sensitivity TCD detector for corrosive gas |
| CN117434193B (en) * | 2023-12-20 | 2024-03-01 | 福建省巨颖高能新材料有限公司 | High-sensitivity TCD detector for corrosive gas |
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