CN213275345U - Single-gas-path multi-gas monitoring gas absorption pool - Google Patents
Single-gas-path multi-gas monitoring gas absorption pool Download PDFInfo
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- CN213275345U CN213275345U CN202022220010.XU CN202022220010U CN213275345U CN 213275345 U CN213275345 U CN 213275345U CN 202022220010 U CN202022220010 U CN 202022220010U CN 213275345 U CN213275345 U CN 213275345U
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Abstract
The utility model discloses a gaseous absorption cell of many gas monitoring of single gas circuit, including sealed casing, have air inlet and gas outlet, a plurality of groups multiple reflection pond, the setting is in sealed casing, and every group multiple reflection pond includes a slice speculum one and a slice speculum two, wherein, is equipped with into unthreaded hole and light-emitting hole on the speculum two, and a plurality of optical fiber flange heads set up on sealed casing lateral wall to be located the multiple reflection pond one end outside, be used for with laser instrument or photoelectric detector optical connection. And two ends of the incident optical fiber are respectively connected with the light inlet and the optical fiber flange head, and two ends of the emergent optical fiber are respectively connected with the light outlet and the optical fiber flange head, wherein different coatings are coated on different reflectors I and reflectors II, so that the purpose of multi-gas monitoring is realized. The absorption cell is based on a laser spectrum technology, six gas absorption cells are formed by using six groups of reflectors, so that simultaneous detection of multiple gases can be realized and met, and the requirements of small volume and low cost are met.
Description
Technical Field
The utility model relates to a gas monitoring device field, concretely relates to gaseous absorption cell of many gas monitoring of single gas circuit.
Background
In some special production application scenes, various flammable and toxic dangerous gases are often generated, and online detection and analysis of the gases are one of key technologies essential for operation, safety and monitoring in the special scenes, and play an important early warning role in reducing accidents such as gas explosion and the like and ensuring safe production.
At present, most of multi-gas monitoring instruments are laser detection instruments or electrochemical instruments, and the two types of monitoring instruments have the defects, an absorption cell of the laser gas monitoring instrument can only monitor one gas generally, if multiple gases are monitored simultaneously, a plurality of gas absorption cells are required to be configured, the volume of the instrument is correspondingly increased, and meanwhile, a plurality of air suction pumps are required to be configured, so that the instrument cost is increased;
the long-time consistency and accuracy of the electrochemical sensor cannot be guaranteed in sensitivity and output concentration, the electrochemical sensor is seriously misaligned in a humid environment, in addition, the electrochemical sensor can only monitor one gas, multi-gas monitoring cannot be realized, the special requirement of multi-gas monitoring requirements cannot be met, and the cost of purchasing the electrochemical sensor of multiple gases is doubled.
SUMMERY OF THE UTILITY MODEL
For overcoming prior art's defect, the utility model aims to provide a gaseous absorption cell of many gas monitoring of single gas circuit to solve many gaseous detection, instrument volume reasonable and this three problem of instrument cost.
Therefore, the utility model provides a gaseous absorption cell of many gas monitoring of single gas circuit, including sealed casing, have air inlet and gas outlet, a plurality of groups multiple reflection pond sets up in the sealed casing, every group the multiple reflection pond includes a slice speculum one and a slice speculum two, wherein, be equipped with into unthreaded hole and light-emitting hole on the speculum two, a plurality of optical fiber flange heads set up on the sealed casing lateral wall, and be located the multiple reflection pond one end outside for be connected with laser instrument or photoelectric detector optic fibre.
The optical fiber comprises an incident optical fiber, two ends of the incident optical fiber are respectively connected with the light inlet and the optical fiber flange head, and an emergent optical fiber, two ends of the emergent optical fiber are respectively connected with the light outlet and the optical fiber flange head, wherein different coatings are coated on the first reflecting mirror and the second reflecting mirror in different groups of multiple reflecting pools, so that the purpose of multi-gas monitoring is achieved.
Furthermore, six groups of multiple reflection pools are arranged, and the six groups of multiple reflection pools are arranged in parallel.
Furthermore, a connecting column for fixing the first reflecting mirror and the second reflecting mirror is arranged between the first reflecting mirror and the second reflecting mirror.
Furthermore, the middle part of the first reflector and the middle part of the second reflector are respectively provided with a connecting hole matched with the connecting column.
Furthermore, a rubber pad used for fixing the connecting column is arranged in the sealing shell.
Furthermore, an air outlet valve is arranged at the air outlet of the sealing shell, and an air inlet valve is arranged at the air inlet of the sealing shell.
Furthermore, an isolation sealing plate is arranged in the sealed shell and divides the sealed shell into an isolation cavity and a closed gas absorption cavity, wherein the multiple reflection pool is positioned in the gas absorption cavity.
Further, the incident optical fiber and the emergent optical fiber penetrate through the isolation sealing plate and are connected with the isolation sealing plate in a sealing mode.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a many gas monitoring of single gas circuit gas absorption cell is based on laser spectrum technique, uses a design of six speculum of group to form six gas absorption cells, and whole absorption cell size is little, can realize and satisfy many gaseous surveys simultaneously, small and with low costs requirement.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of the single-gas-path multi-gas monitoring gas absorption cell of the present invention.
Description of the reference numerals
1. An air outlet valve; 2. sealing the housing; 3. an incident optical fiber; 4. a rubber pad; 5. a first reflecting mirror; 6. connecting columns; 7. an intake valve; 8. an isolation seal plate; 9. an optical fiber flange head; 10. and a second reflecting mirror.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 shows some embodiments according to the invention.
As shown in figure 1, a gaseous absorption cell of many gas monitoring of single gas circuit, including aluminium system and sealed casing 2, set up air inlet and gas outlet on sealed casing 2 lateral wall, be provided with six groups of multiple reflection ponds in the sealed casing 2, six groups of multiple reflection ponds set up side by side, and every group multiple reflection pond all includes a slice speculum 5 and a slice speculum two 10, and both parallel arrangement each other can form the laser reflection return circuit.
The first reflecting mirror and the second reflecting mirror are both high-reflectivity lenses, and different coatings are coated on the first reflecting mirror 5 and the second reflecting mirror 10 in each group of multiple reflecting pools and are used for detecting different types of gas concentrations.
Specifically, connecting holes are respectively formed in the middle parts of the first reflector 5 and the second reflector 10, the connecting column 6 is inserted into the middle of each connecting hole, and the first reflector 5 and the second reflector 10 are connected into a whole through the connecting column 6, so that the absorption optical path with the set length can be achieved.
As shown in fig. 1, a cylindrical surface of the second reflector 10 is provided with a light inlet and a light outlet, an incident optical fiber 3 is disposed in the light inlet, and an outgoing optical fiber is disposed in the light outlet, and after the incident optical fiber 3 and the outgoing optical fiber are mounted to the second reflector 10 and optical path adjustment is performed, the incident optical fiber 3 and the outgoing optical fiber are fixedly connected to the second reflector 10 through glue.
As shown in fig. 1, a plurality of optical fiber flange heads 9 are arranged on the side wall of the sealed housing 2, the incident optical fiber 3 in the second reflector 10 is connected with one optical fiber flange head, the emergent optical fiber is also connected with one optical fiber flange head 9, and the optical fiber flange head 9 is connected with a laser or a photoelectric detector in the gas detection device through an optical fiber to complete the gas concentration detection.
Specifically, an air inlet and an air outlet on the side wall of the sealing shell 2 are respectively connected with an air outlet valve 1 and an air inlet valve 7, and the air inlet valve 7 and the air outlet valve 1 are connected with the sealing shell 2 and then close the valves, and can be opened at any time during starting.
Specifically, the sealing shell 2 is further internally provided with a rubber pad 4 for fixing the connecting column 6, the rubber pad 4 is placed in the sealing shell after the first reflector 5 and the second reflector 10 in the sealing shell 2 and the optical fibers are well placed, then the aluminum metal plate on the uppermost layer is covered, and the sealing is completed by fixing with screws.
Wherein, the utility model discloses a gaseous absorption cell of many gas monitoring of single gas circuit has carried out sealed design, and 2 sizes of whole seal shell are very little, and concrete length 230 millimeters, wide 140 millimeters, high 45 millimeters, metal thickness 6 millimeters, and the absorption optical path of speculum 5 and speculum two 10 is 3 meters in each group's multiple reflection pond, satisfies the requirement of surveying six kinds of gases simultaneously.
In some embodiments, an isolation sealing plate 8 is disposed inside the sealed housing 2, the isolation sealing plate 8 is disposed outside the second reflector 10, and the incident optical fiber 3 and the outgoing optical fiber connected to the second reflector 10 may respectively pass through the isolation sealing plate 8 and be connected to the fiber flange head 9.
Wherein, incident optical fiber 3 and the aperture that jets out optical fiber and pass isolation sealing plate 8 are sealed with AB glue filling to can cut apart into gas absorption chamber and isolation chamber with seal housing 2, make the gas absorption chamber at multireflection cell place keep leakproofness and light-proofness, avoid the condition emergence that light leak and gas leakage appear in the testing process, improve gaseous detection device's the degree of accuracy.
The utility model discloses a theory of operation and process of many gas monitoring gas absorption ponds of single gas circuit are as follows:
the whole absorption cell structure takes an aluminum sealed shell as a carrier, six groups of multiple reflection cells are horizontally placed in the shell, each multiple reflection cell comprises a first reflection mirror 5 and a second reflection mirror 10 which are arranged in parallel, one end of each second reflection mirror 10 is provided with a hole and is input in an optical fiber collimation mode, an external laser is connected with an optical fiber flange head 9, laser enters the second reflection mirror 10 through the incident optical fiber 3 and is reflected back and forth with the first reflection mirror 5, laser spots are finally focused on the optical fiber section of the other side of the second reflection mirror 10 after being absorbed by gas, the laser absorbed by the gas is transmitted to the optical fiber flange head 9 through the emergent optical fiber, and the optical fiber is connected with the optical fiber flange head to enable the laser to enter a photoelectric detector for further processing so as to finish the purpose of gas detection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A single-gas-path multi-gas monitoring gas absorption cell, comprising:
a sealed housing (2) having an air inlet and an air outlet,
a plurality of groups of multi-reflecting cells arranged in the sealed shell (2), wherein each group of multi-reflecting cells comprises a first reflecting mirror (5) and a second reflecting mirror (10), the second reflecting mirror (10) is provided with a light inlet and a light outlet,
a plurality of optical fiber flange heads (9) which are arranged on the side wall of the sealed shell (2), are positioned outside one end of the multi-reflection pool and are used for being connected with a laser or a photoelectric detector through optical fibers,
an incident optical fiber (3), both ends of the incident optical fiber (3) are respectively connected with the light inlet and the optical fiber flange head (9), an
The two ends of the ejection optical fiber are respectively connected with the light outlet and the optical fiber flange head (9),
different coatings are coated on the first reflecting mirror (5) and the second reflecting mirror (10) in different groups of multiple reflecting pools, so that the purpose of multi-gas monitoring is achieved.
2. The single-gas path multiple-gas monitoring gas absorption cell according to claim 1, wherein the multiple reflection cells are provided in six groups, and the six groups of multiple reflection cells are arranged in parallel with each other.
3. The single-gas path multi-gas monitoring gas absorption cell according to claim 1, wherein a connection column (6) for fixing the first reflector (5) and the second reflector (10) is arranged between the two reflectors.
4. The single-gas-path multi-gas monitoring gas absorption cell according to claim 3, wherein the middle part of the first reflector (5) and the middle part of the second reflector (10) are respectively provided with a connecting hole matched with the connecting column (6).
5. A single-gas path multiple-gas monitoring gas absorption cell according to claim 3, wherein a rubber gasket (4) for fixing the connecting column (6) is provided in the sealed housing (2).
6. The single-gas-path multi-gas monitoring gas absorption cell according to claim 1, wherein an air outlet valve (1) is arranged at an air outlet of the sealed housing (2), and an air inlet valve (7) is arranged at an air inlet of the sealed housing (2).
7. The single-gas path multiple-gas monitoring gas absorption cell according to claim 1, wherein an isolation sealing plate (8) is provided in the sealed housing (2), the isolation sealing plate (8) dividing the sealed housing (2) into an isolation chamber and a closed gas absorption chamber, wherein the multiple reflection cell is located in the gas absorption chamber.
8. The single-gas path multiple-gas monitoring gas absorption cell according to claim 7, wherein the incident optical fiber (3) and the exiting optical fiber penetrate through the isolation sealing plate (8) and are hermetically connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022220010.XU CN213275345U (en) | 2020-09-30 | 2020-09-30 | Single-gas-path multi-gas monitoring gas absorption pool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022220010.XU CN213275345U (en) | 2020-09-30 | 2020-09-30 | Single-gas-path multi-gas monitoring gas absorption pool |
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| CN213275345U true CN213275345U (en) | 2021-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047132A (en) * | 2022-01-11 | 2022-02-15 | 山东省科学院激光研究所 | Long-optical-path gas absorption cell for multi-gas detection |
| CN115452756A (en) * | 2022-09-26 | 2022-12-09 | 南瑞集团有限公司 | Sulfur hexafluoride decomposition component detection device |
-
2020
- 2020-09-30 CN CN202022220010.XU patent/CN213275345U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047132A (en) * | 2022-01-11 | 2022-02-15 | 山东省科学院激光研究所 | Long-optical-path gas absorption cell for multi-gas detection |
| CN115452756A (en) * | 2022-09-26 | 2022-12-09 | 南瑞集团有限公司 | Sulfur hexafluoride decomposition component detection device |
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