CN211741050U - Variable-range gas-phase molecular absorption cell system and absorption spectrometer - Google Patents
Variable-range gas-phase molecular absorption cell system and absorption spectrometer Download PDFInfo
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- CN211741050U CN211741050U CN201922199033.4U CN201922199033U CN211741050U CN 211741050 U CN211741050 U CN 211741050U CN 201922199033 U CN201922199033 U CN 201922199033U CN 211741050 U CN211741050 U CN 211741050U
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Abstract
The utility model relates to a variable range gaseous phase molecule absorption cell system and absorption spectrometer, this absorption cell system are the extinction cell group of being built formation by a plurality of extinction cells, and a plurality of extinction cells are connected through the pipeline to set up switching-over valve and supporting pipeline in the pipeline, the realization is waited to examine the different extinction cell of gaseous entering, forms different optical path routes, compares with prior art, the utility model discloses can be applied to the sample determination of different concentrations, prevent that the measuring signal saturation that absorbance arouses from excessively arousing and the poor condition of the survey result degree of accuracy and the stability of extinction value excessively arousing, automatic optical path matching is realized in the control of different absorbance accessible switching-over valves, reduces the user and dilutes, the pretreatment work of concentrated sample, the work of the artifical extinction cell of changing of fungible tradition.
Description
Technical Field
The utility model relates to a detecting instrument field, concretely relates to variable range gaseous phase molecular absorption cell system and absorption spectrum appearance.
Background
When the existing gas-phase molecular absorption spectrometer detects gas to be detected, the gas to be detected is introduced into a quartz absorption cell, light rays penetrate through the absorption cell, and the absorbance of the gas to be detected is measured according to the Lambert beer law, so that the concentration of a sample is obtained.
Because the length of the light absorption cell is fixed, the optical path is kept unchanged in the measurement process, and different application requirements of high absorbance and low absorbance cannot be considered in a single optical path. For example, in the case of a high concentration sample, a long optical path absorbance cell may cause absorbance saturation; under the condition of low-concentration samples, the short absorption cell may cause low absorbance, and the detection signal is reduced, which all cause the deterioration of the linear fitting degree of the standard curve.
Some optical path adjustable gas absorption cells have been disclosed in the prior art, for example, patent CN105842167A discloses an optical path adjustable gas absorption cell, which adjusts the range and sensitivity of the device by changing the optical path of the gas absorption cell by adjusting the directions of two mirrors of the gas absorption cell. Patent CN 104155241a discloses a long-range optical absorption cell with adjustable optical path, which adopts an incident single spherical mirror and an emergent spherical mirror respectively located at an incident end and an emergent end to realize multiple reflection long optical path of incident light in the absorption cell, and realize quasi-continuous adjustment of the long optical path of the absorption cell.
However, the above structures all need very precise optical adjustment structures, and in the actual engineering process, a large optical path fluctuation is introduced by a fine adjustment deviation, which results in unreliability of data quality, if the structure needs to be accurately controlled, a control structure and a maintenance mechanism with high difficulty are required, so that the realization difficulty is high, the manufacturing cost is high, and the optical path adjustment effect cannot be achieved simply through valve bank control.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem and providing a variable range gaseous phase molecular absorption cell system and absorption spectrometer to solve the problem that exists among the prior art, realize the many optical distances automatic switch-over under the different applied scenes, the test is more accurate, operates simplyr.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a variable range gaseous phase molecule absorption cell system, this absorption cell system is the extinction pond group of forming is built by a plurality of extinction ponds, and a plurality of extinction ponds pass through the pipeline and connect to set up switching-over valve and supporting pipeline in the pipeline, realize waiting to examine gas and get into different extinction ponds, form different optical path routes.
Further, the light absorption cell comprises an absorption cell body, the absorption cell body is provided with an air inlet end, an air outlet end and an air chamber, the air inlet end and the air outlet end are located at two ends of the absorption cell body, the air chamber is communicated with the air inlet end and the air outlet end, and the air chamber is used for containing a gas to be detected;
the pipelines are respectively connected with the gas inlet end and the gas outlet end of the absorption cell body, and the reversing valve is arranged in the pipelines so that gas to be detected passes through a single absorption cell;
alternatively, the gas to be detected is passed through two or more absorption cells connected in series.
Further, the reversing valve is a three-way valve or a four-way valve.
Further, the reversing valve is an electromagnetic control valve.
Further, the plurality of light absorption cells have different optical lengths.
Further, a reflector component is arranged in the absorption pool system and used for changing the path of the incident light source.
Further, the absorption cell system comprises a first absorption cell, a second absorption cell, a first reversing valve and a second reversing valve,
the gas inlet ends of the first light absorption pool and the second light absorption pool are connected with a gas inlet pipe, and the first reversing valve is arranged on the gas inlet pipe, so that gas to be detected enters the first light absorption pool or the second light absorption pool respectively;
the gas outlet end of the first light absorption cell is communicated with the gas inlet end of the second light absorption cell through a first gas outlet pipe, and the second reversing valve is arranged on the first gas outlet pipe, so that the gas to be detected coming out of the first light absorption cell flows out or enters the second light absorption cell.
Further, the absorption cell system comprises a first absorption cell, a second absorption cell, a third absorption cell, a first reversing valve, a second reversing valve and a third reversing valve;
the gas inlet ends of the first light absorption pool, the second light absorption pool and the third light absorption pool are connected with a gas inlet pipe, and the first reversing valve is arranged on the gas inlet pipe, so that gas to be detected enters the first light absorption pool, the second light absorption pool or the third light absorption pool respectively;
the air outlet end of the first light absorption cell is communicated with the air inlet end of the second light absorption cell through a first air outlet pipe, the air outlet end of the second light absorption cell is communicated with the air inlet end of the third light absorption cell through a second air outlet pipe,
the second reversing valve is arranged on the first air outlet pipe, so that the gas to be detected from the first light absorption pool flows out or enters the second light absorption pool;
and the third reversing valve is arranged on the second air outlet pipe, so that the gas to be detected which flows out of the second light absorption pool flows out or enters the third light absorption pool.
The utility model provides an absorption spectrometer, includes foretell variable range gaseous phase molecule absorption cell system, still includes light source, lens group and spectral detection ware, the light of light source emission characteristic wavelength, the lens group is located between light source and absorption cell and the spectral detection ware for focus the collimation to the light source, the light that the absorption cell came out is received through the spectral detection ware.
Compared with the prior art, the utility model discloses a set up the connected mode of absorption cell, realize the component of variable range gaseous phase molecule absorption cell system, realize waiting to examine gaseous different light absorption cell that gets into through switching-over valve and supporting pipeline, produce different absorption signals, realize the survey to the different optical distances of height of low high different sample concentration, have following beneficial effect:
1. the light absorption cells with different optical paths can be applied to the measurement of samples with different concentrations, and the situations of measurement signal saturation caused by overhigh absorbance and measurement result accuracy and stability caused by overhigh absorbance value are prevented.
2. The automatic optical path matching can be realized by controlling different absorbances through the reversing valve, the pretreatment work of diluting and concentrating samples by a user is reduced, and the traditional work of manually replacing an absorption cell can be replaced.
3. The optical path adjusting effect can be achieved simply through valve group control, the realization difficulty is low, and the manufacturing cost is low.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1, the variable range gas phase molecular absorption cell system comprises a first absorption cell 300, a second absorption cell 400, a first reversing valve 700 and a second reversing valve 800, wherein the absorption cells have different optical paths. The gas inlet ends of the first light absorption cell 300 and the second light absorption cell 400 are connected with a gas inlet pipe 1100, and the first reversing valve 700 is arranged on the gas inlet pipe 1100, so that gas to be detected enters the first light absorption cell 300 or the second light absorption cell 400 respectively; the gas outlet end of the first light absorption cell 300 is communicated with the gas inlet end of the second light absorption cell 400 through a first gas outlet pipe 1200, and the second reversing valve 800 is arranged on the first gas outlet pipe 1200, so that the gas to be detected which is discharged from the first light absorption cell 300 flows out or enters the second light absorption cell 400.
The lens group 200 is arranged between the light source 100 and the absorption cell and between the absorption cell and the spectral detector 600, and is used for focusing and collimating the light source 100, and the light from the absorption cell is received by the spectral detector.
During the specific test, the gas to be tested enters the gas inlet pipe 1100 through the first reversing valve 700, the first reversing valve 700 can adopt a three-way electromagnetic valve, through valve control, the gas to be detected can independently enter the first light absorption cell 300 or independently pass through the second light absorption cell 400, the gas to be detected after passing through the first light absorption cell 300 enters the first gas outlet pipe 1200, and the gas to be detected which is discharged from the first light absorption cell 300 can directly flow out or enter the second light absorption cell 400 again through the control of the second reversing valve 800, namely, the first absorption cell 300 and the second absorption cell 400 are used simultaneously, so that the measurement of high, medium and low optical paths of low, medium and high different sample concentrations can be realized, and the measurement of different optical paths of different sample concentrations can be realized by using the first absorption cell 300 or the second absorption cell 400 alone or by using the first absorption cell 300 and the second absorption cell 400 simultaneously.
Example 2
On the basis of the embodiment 1, one light absorption cell and one reversing valve are added, namely, a third light absorption cell 500 and a third reversing valve 900 are added.
As shown in fig. 2, the absorption cell system includes a first absorption cell 300, a second absorption cell 400, a third absorption cell 500, a first direction valve 700, a second direction valve 800, and a third direction valve 900; the air inlet ends of the first light absorption cell 300, the second light absorption cell 400 and the third light absorption cell 500 are connected with an air inlet pipe 1100, and the first reversing valve 700 is arranged on the air inlet pipe 1100, so that the gas to be detected enters the first light absorption cell 300, the second light absorption cell 400 or the third light absorption cell 500 respectively;
the gas outlet end of the first light absorption cell 300 is communicated with the gas inlet end of the second light absorption cell 400 through a first gas outlet pipe 1200, the gas outlet end of the second light absorption cell 400 is communicated with the gas inlet end of the third light absorption cell 500 through a second gas outlet pipe 1300, and the second reversing valve 800 is arranged on the first gas outlet pipe 1200, so that the gas to be detected which is discharged from the first light absorption cell 300 flows out or enters the second light absorption cell 400; the third reversing valve 900 is disposed on the second outlet pipe 1300, so that the gas to be detected from the second light absorption cell 400 flows out or enters the third light absorption cell 500.
During specific testing, gas to be tested enters the gas inlet pipe 1100 through the first reversing valve 700, the first reversing valve 700 can adopt a four-way electromagnetic valve, and the gas to be tested can respectively and independently enter the first light absorption pool 300, the second light absorption pool 400 or the third light absorption pool 500 through valve control.
The gas to be detected after passing through the first light absorption cell 300 enters the first air outlet pipe 1200, and the gas to be detected which is discharged from the first light absorption cell 300 can directly flow out or enter the second light absorption cell 400 through the control of the second reversing valve 800, namely, the gas passes through the first light absorption cell 300 and the second light absorption cell 400 at the same time;
the gas to be detected after passing through the second light absorption cell 400 enters the second air outlet pipe 1300, and the gas to be detected coming out of the second light absorption cell 400 can directly flow out or enter the third light absorption cell 500 under the control of the third reversing valve 900, namely, simultaneously passes through the first light absorption cell 300, the second light absorption cell 400 and the third light absorption cell 500.
Thus, the measurement of different optical paths for different sample concentrations can be realized through the first light absorption cell 300, the second light absorption cell 400 and the third light absorption cell 500 independently, or through the first light absorption cell 300 and the second light absorption cell 400 simultaneously and through the third light absorption cell 500 simultaneously.
In addition, a reflector assembly 1000 is provided in the absorption cell system to change the path of the incident light source, which in turn reduces the arrangement space of the absorption cell.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. The utility model provides a variable range gaseous phase molecule absorption cell system which characterized in that, this absorption cell system is the extinction pond group that forms by a plurality of extinction ponds structure, and a plurality of extinction ponds pass through the pipeline and connect to set up switching-over valve and supporting pipeline in the pipeline, realize waiting to examine gas and get into different extinction ponds, form different optical path routes.
2. The variable-range gas-phase molecular absorption cell system according to claim 1, wherein the absorption cell comprises an absorption cell body, the absorption cell body is provided with a gas inlet end, a gas outlet end and a gas chamber, the gas inlet end and the gas outlet end are positioned at two ends of the absorption cell body, the gas chamber is communicated with the gas inlet end and the gas outlet end, and the gas chamber is used for accommodating a gas to be measured;
the pipelines are respectively connected with the gas inlet end and the gas outlet end of the absorption cell body, and the reversing valve is arranged in the pipelines so that gas to be detected passes through a single absorption cell;
alternatively, the gas to be detected is passed through two or more absorption cells connected in series.
3. The variable range vapor phase molecular absorption cell system of claim 2, wherein the directional valve is a three-way or four-way valve.
4. The variable range gas phase molecular absorption cell system of claim 3, wherein the directional control valve is an electromagnetic control valve.
5. The variable range gas phase molecular absorption cell system of claim 2, wherein the plurality of absorption cells have different optical lengths.
6. The variable range vapor phase molecular absorption cell system of claim 2, wherein a mirror assembly is provided in the absorption cell system to change the path of the incident light source.
7. The variable-range gas-phase molecular absorption cell system according to claim 2, wherein the absorption cell system comprises a first absorption cell (300), a second absorption cell (400), a first reversing valve (700) and a second reversing valve (800),
the gas inlet ends of the first light absorption cell (300) and the second light absorption cell (400) are connected with a gas inlet pipe (1100), and the first reversing valve (700) is arranged on the gas inlet pipe (1100) to enable gas to be detected to enter the first light absorption cell (300) or the second light absorption cell (400) respectively;
the gas outlet end of the first light absorption cell (300) is communicated with the gas inlet end of the second light absorption cell (400) through a first gas outlet pipe (1200), and the second reversing valve (800) is arranged on the first gas outlet pipe (1200), so that gas to be detected coming out of the first light absorption cell (300) flows out or enters the second light absorption cell (400).
8. The variable-range gas-phase molecular absorption cell system according to claim 2, wherein the absorption cell system comprises a first absorption cell (300), a second absorption cell (400), a third absorption cell (500), a first reversing valve (700), a second reversing valve (800) and a third reversing valve (900);
the gas inlet ends of the first light absorption cell (300), the second light absorption cell (400) and the third light absorption cell (500) are connected with a gas inlet pipe (1100), and the first reversing valve (700) is arranged on the gas inlet pipe (1100) so that gas to be detected enters the first light absorption cell (300), the second light absorption cell (400) or the third light absorption cell (500) respectively;
the air outlet end of the first light absorption cell (300) is communicated with the air inlet end of the second light absorption cell (400) through a first air outlet pipe (1200), the air outlet end of the second light absorption cell (400) is communicated with the air inlet end of the third light absorption cell (500) through a second air outlet pipe (1300),
the second reversing valve (800) is arranged on the first air outlet pipe (1200), so that the gas to be detected from the first light absorption cell (300) flows out or enters the second light absorption cell (400);
and the third reversing valve (900) is arranged on the second air outlet pipe (1300) so that the gas to be detected coming out of the second light absorption cell (400) flows out or enters the third light absorption cell (500).
9. An absorption spectrometer comprising a variable range gas phase molecular absorption cell system according to any of claims 1 to 8.
10. An absorption spectrometer according to claim 9, further comprising a light source (100), a lens assembly (200) and a spectroscopic detector (600),
the light source emits light with characteristic wavelength, the lens group is arranged between the light source and the absorption cell and between the absorption cell and the spectral detector and is used for focusing and collimating the light source, and the light emitted from the absorption cell is received by the spectral detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199033.4U CN211741050U (en) | 2019-12-10 | 2019-12-10 | Variable-range gas-phase molecular absorption cell system and absorption spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199033.4U CN211741050U (en) | 2019-12-10 | 2019-12-10 | Variable-range gas-phase molecular absorption cell system and absorption spectrometer |
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| CN211741050U true CN211741050U (en) | 2020-10-23 |
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| CN201922199033.4U Active CN211741050U (en) | 2019-12-10 | 2019-12-10 | Variable-range gas-phase molecular absorption cell system and absorption spectrometer |
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