CN219870967U - High-stability gas measurement air chamber and measuring instrument thereof - Google Patents
High-stability gas measurement air chamber and measuring instrument thereof Download PDFInfo
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- CN219870967U CN219870967U CN202320881396.XU CN202320881396U CN219870967U CN 219870967 U CN219870967 U CN 219870967U CN 202320881396 U CN202320881396 U CN 202320881396U CN 219870967 U CN219870967 U CN 219870967U
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- inner tube
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- optical fiber
- filter element
- end flange
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- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 14
- 239000003546 flue gas Substances 0.000 abstract description 14
- 239000007789 gas Substances 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000005070 sampling Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 239000006059 cover glass Substances 0.000 description 3
- 230000002572 peristaltic effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to the technical field of flue gas detection, in particular to a gas measurement air chamber with high stability and a measuring instrument thereof, which comprises a vacuum heat insulation tube, an inner tube arranged in the vacuum heat insulation tube, an inner tube front end flange and an inner tube rear end flange welded at two ends of the inner tube, wherein a pyramid prism is arranged in the inner tube front end flange, one side of the inner tube rear end flange is connected with a Y-shaped optical fiber, a dual-optical axis collimating lens is arranged in the inner tube rear end flange, the dual-optical axis collimating lens is formed by bonding two half collimating lenses, the distance between optical axes of the two half collimating lenses is equal to the distance between fiber cores of the Y-shaped optical fiber, and the distance from the end part of the Y-shaped optical fiber to the dual-optical axis collimating lens is equal to the focal length of the dual-optical axis collimating lens. The position of the light returned to the receiving optical fiber by the air chamber is determined by the parameters of the optical parts, is basically not affected by assembly, has low assembly difficulty and has high stability.
Description
Technical Field
The utility model relates to the technical field of flue gas detection, in particular to a gas measurement air chamber with high stability and a measuring instrument thereof.
Background
At present, SO in flue gas needs to be measured in flue gas emission monitoring 2 、NO、NO 2 And the concentration of the pollutants can be measured by an ultraviolet absorption method. The concentration of pollutants in flue gas is measured by a common ultraviolet absorption method, namely a hot wet method and a cold dry method. Wherein the hot wet method does not need dehumidification, and can avoid SO in the condensation process 2 、NH 3 The components which are easy to dissolve in water are dissolved and lost, and the air chamber can be arranged in the sampling tube, so that the structure of integrating the sampling tube and the host is designed, and the portable smoke analyzer is convenient to carry, and is more suitable for portable smoke analysis. However, in the method of measuring the smoke components by the hot wet method, the air chamber is often in the process of repeatedly and alternately changing from the ambient temperature to over 120 ℃, and the requirement of high stability is provided for the stability of the light path of the air chamber. The air chamber structure of the current hot wet flue gas analyzer generally has the defect of poor stability, the optical signal received by the photoelectric sensor is influenced by the air chamber structure to a large extent, when the air chamber structure is slightly deformed, the received optical energy is greatly changed, the reliability of the hot wet flue gas measurement mode is seriously influenced, the air chamber is positioned in a sampling tube, the defect of high difficulty in maintenance process also exists, and after the air chamber is detached from the sampling tube, the air chamber can be wiped and maintained, and the light path is required to be readjusted after the completion. Therefore, the current hot wet flue gas analyzer has the defects of short maintenance period and high maintenance difficulty.
Chinese patent No.: 201921429975.0, patent name: the scheme of using the wedge-shaped mirror and the right angle pyramid in the patent turns the light path, and the defect is that the pyramid component needs to be adjusted to a fixed angle to sample proper light intensity, and the pyramid needs to be rotated to an original angle after each debugging, so that the maintenance difficulty is increased; the optical surface is increased and the light intensity collection efficiency is reduced.
Chinese patent No.: 201921429518.1, patent name: the patent of the high-stability gas measurement air chamber and the measuring instrument thereof uses a non-right angle pyramid rotary light path, wherein the defect is that the pyramid needs to be adjusted to a fixed angle to sample proper light intensity, and the pyramid needs to be rotated to an original angle after each debugging, so that the maintenance difficulty is increased.
Disclosure of Invention
The utility model aims to provide an elliptical cylinder-shaped multiple reflection light enhancement device so as to solve the problems of unstable light path system and difficult debugging of the existing hot wet flue gas analyzer.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model relates to a gas measurement gas chamber with high stability, which comprises a vacuum heat insulation pipe, an inner pipe arranged in the vacuum heat insulation pipe, an inner pipe front end flange and an inner pipe rear end flange welded at two ends of the inner pipe, wherein a pyramid prism is arranged in the inner pipe front end flange, one side of the inner pipe rear end flange is connected with a Y-shaped optical fiber, and the utility model further improves the following steps on the basis of the prior art: the dual-optical-axis collimating lens is arranged in the flange at the rear end of the inner tube, the dual-optical-axis collimating lens is formed by bonding two half collimating lenses, the distance between the optical axes of the two half collimating lenses is equal to the distance between the cores of the emitting optical fiber 61 and the receiving optical fiber 62 of the Y-shaped optical fiber, and the distance from the end part of the Y-shaped optical fiber to the dual-optical-axis collimating lens is equal to the focal length of the dual-optical-axis collimating lens.
Preferably, the device further comprises an adjusting component for adjusting the pyramid prism, wherein the adjusting component is arranged inside the flange at the front end of the inner tube and comprises a fixed cylinder, a cylinder cover, a rubber mat and protective glass, the rubber mat is arranged in the cylinder cover, the cylinder cover is connected with the fixed cylinder, the pyramid prism is arranged in the fixed cylinder, one end of a reflecting surface is propped against the rubber mat, the incident surface of the pyramid prism is closely adjacent to the protective glass, and the protective glass is arranged at the bottom of the fixed cylinder.
Preferably, the other end of the inner pipe front end flange is welded with the outer pipe front end flange.
Preferably, the flue gas filter further comprises a primary filter element and a secondary filter element for filtering flue gas, wherein the secondary filter element is arranged in the flange at the front end of the inner tube, and the primary filter element is arranged in the flange at the front end of the outer tube in close proximity to the secondary filter element.
Preferably, the filter element pressing cap is further included, and the filter element pressing cap is fixed with the front end flange of the outer tube and supports the primary filter element and the secondary filter element.
Preferably, the collimating lens is fixed by a lens fixing cylinder at the rear end flange of the inner tube.
Preferably, the optical fiber connector also comprises an optical fiber connector, wherein one end of the optical fiber connector is sleeved outside the lens fixing cylinder, and the other end of the optical fiber connector extends out of the vacuum heat insulation pipe to be connected with the Y-shaped optical fiber.
Preferably, the device further comprises an air outlet nozzle which is fixed on the flange at the rear end of the inner tube and communicated with the inner part of the inner tube.
Preferably, an air guide groove is formed in the inner wall of the flange at the front end of the inner tube, and the air guide groove is communicated with the inner portion of the inner tube.
The utility model also provides a measuring instrument, which is provided with the air chamber.
Compared with the prior art, the utility model has the beneficial effects that:
the position of the light returned to the receiving optical fiber is determined by the parameters of the optical part, is basically not affected by assembly, has low assembly difficulty and high stability;
after the parameters of the Y-shaped optical fiber and the double-optical-axis collimating lens are determined, the optical path can be changed by changing the distance from the pyramid prism to the double-optical-axis collimating lens, other parameters are not required to be adjusted, and the universality is strong.
Drawings
FIG. 1 is a schematic diagram of a gas measurement chamber with high stability according to the present utility model;
FIG. 2 is a schematic view of the light path of the gas measuring chamber with high stability according to the present utility model;
FIG. 3 is a block diagram of a dual-axis collimating lens of the present utility model;
FIG. 4 is a block diagram of the front flange of the inner tube of the present utility model;
FIG. 5 is a block diagram of the rear end flange of the inner tube of the present utility model;
FIG. 6 is an external block diagram of the meter of the present utility model;
fig. 7 is a diagram showing the internal structure of the main chassis of the measuring instrument of the present utility model.
Reference numerals illustrate:
the vacuum heat insulation tube 1, the inner tube 2, the inner tube front end flange 3, the inner tube rear end flange 4, the pyramid prism 5, the Y-shaped optical fiber 6, the transmitting optical fiber 61, the receiving optical fiber 62, the dual-optical axis collimating lens 7, the fixed cylinder 8, the cylinder cover 9, the rubber pad 10, the protective glass 11, the outer tube front end flange 12, the primary filter element 13, the secondary filter element 14, the filter element press cap 15, the lens fixed cylinder 16, the optical fiber connector 17, the air outlet nozzle 18, the first O-shaped ring 19, the second O-shaped ring 20, the third O-shaped ring 21, the primary filter element rubber pad 22, the rubber ring 23, the mainframe 24, the air chamber transfer tube 25, the sampling pump 26, the spectrometer 27, the industrial personal computer 28, the pulse xenon lamp 29, the electrochemical sensor assembly 30, the peristaltic pump 31, the condensation dewatering assembly 32 and the lower computer circuit board 33.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 and 3, the present utility model provides a technical solution:
the utility model provides a high gas measurement air chamber of stability, includes vacuum heat insulating tube 1, sets up at the inside inner tube 2 of vacuum heat insulating tube 1, inner tube 2 both ends welded inner tube front end flange 3, inner tube rear end flange 4, installs pyramid prism 5 in the inner tube front end flange 3, Y type optic fibre 6 is connected to inner tube rear end flange 4 one side, install two optical axis collimating lens 7 in the inner tube rear end flange 3, two optical axis collimating lens 7 are laminated by two half collimating lens and form, the distance between the optical axis of two half collimating lens equals the distance between the two optic fibre cores of emitting optic fibre 61 and receiving optic fibre 62 of Y type optic fibre 6, the tip of Y type optic fibre 6 equals the focus of two optical axis collimating lens 7 to the distance of two optical axis collimating lens 7. The inner pipe front end flange 3 is shown in fig. 4, the inner pipe front end flange 3 is provided with an air guide groove 31, the inner pipe rear end flange 4 is shown in fig. 5, and the inner pipe rear end flange 4 is provided with a set screw hole 41 and an air outlet hole 42. The distance between the cores of the emitting fiber 61 and the receiving fiber 62 of the Y-shaped optical fiber 6 of the present embodiment is 0.4mm, and thus the distance between the two optical axes of the two-optical axis collimator lens 7 is also 0.4mm.
Referring to fig. 2, the light emitted from the end of the emission fiber 61 is parallel after passing through the lower half of the double-axis collimator lens 7, and the two optical axes of the double-axis collimator lens 7 are the same as the distance between the cores of the Y-shaped fiber 6, so that the axes of the two optical cores of the Y-shaped fiber 6 are respectively overlapped with the two optical axes of the double-axis collimator lens 7, and the emission light is parallel after passing through the lower half of the double-axis collimator lens 7. The symmetry line of the double optical axis collimating lens 7 coincides with the optical axis of the pyramid prism 5, so that the parallel light incident on the pyramid prism 5 is reflected for 3 times inside the pyramid prism 5, and then is laterally moved upwards and deflected for 180 degrees to be emitted, and returns to the upper half part of the double optical axis collimating lens 7, and can be just converged to the end part of the receiving optical fiber 62 after passing through the double optical axis collimating lens 7. Since the distance between the returned parallel light converging position and the emission point is determined by the distance between the two optical axes of the two-optical axis collimator lens 7, when the air chamber is slightly deformed and the angle of the pyramid prism 5 is changed to some extent, the light energy received by the receiving optical fiber 62 is basically unchanged, and thus the stability is high. And, the distance from the pyramid prism 5 to the dual-optical axis collimating lens 7 can be set at will to obtain different optical paths.
For convenient installation and maintenance of optical components, as a preferred implementation manner of this embodiment, still include the adjusting part that is used for adjusting the pyramid prism, adjusting part sets up inside inner tube front end flange 3, including fixed section of thick bamboo 8, cover 9, cushion 10, protection glass 11, cushion 10 sets up in cover 9, cover 9 connects fixed section of thick bamboo 8, pyramid prism 5 sets up in fixed section of thick bamboo 8, and reflection face one end withstands cushion 10, the incident surface next-door neighbour protection glass 11 of pyramid prism 5, protection glass 11 sets up in fixed section of thick bamboo 8 bottom.
Further in order to increase the air tightness of the adjusting component, the cylinder cover 9 is sleeved with a first O-shaped ring 19, so that the cylinder cover 9 and the fixed cylinder 8 are tightly combined. In order to protect the corner cube 5 and the cover glass 11, a second O-ring 20 and a third O-ring 21 are provided on the contact surface of the corner cube 5 and the cover glass 11 and the contact surface of the cover glass 11 and the fixing tube 8, respectively.
The other end of the inner pipe front end flange 3 of the air chamber of the embodiment is welded with the outer pipe front end flange 12. In order to ensure that the flue gas is effectively filtered and the measurement accuracy is ensured, as a preferred implementation manner of the embodiment, the flue gas filter further comprises a primary filter element 13 and a secondary filter element 14 for filtering the flue gas, wherein the secondary filter element 14 is arranged in the inner pipe front end flange 3, and the primary filter element 13 is arranged in the outer pipe front end flange 12 in close proximity to the secondary filter element 14. The primary filter element 11 is a stainless steel sintered filter element, and the secondary filter 12 is a polytetrafluoroethylene filter element.
In order to facilitate the disassembly of the primary filter element 11 and the secondary filter element 12, as a preferred implementation of the embodiment, the filter element pressing cap 15 is further included, and the filter element pressing cap 15 is fixed with the outer tube front end flange 12 against the primary filter element 13 and the secondary filter element 14. In order to increase the air tightness of the air chamber, a first-stage filter element rubber pad 22 can be arranged between the first-stage filter element 11 and the filter element pressing cap 15. When the pyramid prism 5 needs maintenance, only the filter element pressing cap 15 needs to be detached, the primary filter element 11 and the secondary filter element 12 are taken out, and the whole air chamber does not need to be detached.
In the present embodiment, the collimating lens 5 is fixed by the lens fixing cylinder 16 at the rear end flange 4 of the inner tube. The optical fiber connector 17 is sleeved outside the lens fixing cylinder 16 at one end, and one end of the optical fiber connector 17 extends out of the vacuum heat insulation tube 1 to be connected with the Y-shaped optical fiber 6. The air outlet nozzle 18 is fixed on the inner pipe rear end flange 4, and the air outlet nozzle 17 is communicated with the air outlet hole 42 of the inner pipe rear end flange 4. The fiber optic connector 16 is secured by a set screw passing through set screw hole 41 in inner tube rear end flange 4. The inner tube rear end flange 4 is sleeved with a rubber ring 23.
An air guide groove 31 is formed in the inner wall of the inner pipe front end flange 3, and the air guide groove 31 is communicated with the inner part of the inner pipe 2.
Referring to fig. 6 and 7, the present embodiment further provides a measuring instrument, the measuring instrument has a main chassis 24, an air chamber transfer tube 25 is installed on the main chassis 24, the air chamber transfer tube 25 is connected with the air chamber of the present embodiment, and a handle, a display screen, a power interface and a data interface are disposed on the main chassis 24. The inside of the main case 24 is provided with a sampling pump 26, a spectrometer 27, an industrial personal computer 28, a pulse xenon lamp 29, an electrochemical sensor assembly 30, a peristaltic pump 31, a condensation water removal assembly 32 and a lower computer circuit board 33. Other structures outside the measuring instrument degassing chamber are all in the prior art, and the connection relation is not repeated.
When the measuring instrument of the embodiment works, the sampling pump 26 works, so that smoke enters the inner tube 2 from the air guide groove 31 of the front end flange 3 of the inner tube after two-stage filtration of the filter element press cap 15 at the end part of the air chamber through the first-stage filter element 11 and the second-stage filter element 12, the air chamber is discharged from the air outlet nozzle 18 through the air outlet hole 42 of the rear end flange 4 of the inner tube, the air outlet nozzle 18 is connected with the condensation water removing component 32 in the main machine box 24 through a hose, the condensation water generated by the condensation water removing component 32 enters the peristaltic pump 31 through the hose and is discharged, and the smoke after water removal enters the sampling pump and then enters the electrochemical sensor component 30 through the hose and is finally discharged through the air guide pipe communicated with the electrochemical sensor component 30.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a gas measurement air chamber that stability is high, includes vacuum heat insulating tube, sets up at the inside inner tube of vacuum heat insulating tube, inner tube both ends welded inner tube front end flange, inner tube rear end flange, installs the pyramid prism in the inner tube front end flange, Y type optic fibre, its characterized in that are connected to inner tube rear end flange one side: the dual-optical-axis collimating lens is mounted in the flange at the rear end of the inner tube and is formed by bonding two half collimating lenses, the distance between the optical axes of the two half collimating lenses is equal to the distance between the fiber cores of the emitting optical fiber and the receiving optical fiber of the Y-shaped optical fiber, and the distance from the end part of the Y-shaped optical fiber to the dual-optical-axis collimating lens is equal to the focal length of the dual-optical-axis collimating lens.
2. The high stability gas measurement cell of claim 1, wherein: still including the adjusting part that is used for adjusting pyramid prism, adjusting part sets up inside the inner tube front end flange, including fixed section of thick bamboo, cover, cushion, protection glass, the cushion sets up in the cover, the cover is connected fixed section of thick bamboo, pyramid prism sets up in fixed section of thick bamboo, and the cushion is withstood to reflecting surface one end, pyramid prism's incident surface next-door neighbour protection glass, protection glass sets up in fixed section of thick bamboo bottom.
3. The high stability gas measurement cell of claim 1, wherein: and the other end of the inner pipe front end flange is welded with the outer pipe front end flange.
4. A gas measurement cell of high stability according to claim 3, wherein: the smoke filter is characterized by further comprising a primary filter element and a secondary filter element which are used for filtering smoke, wherein the secondary filter element is arranged in the flange at the front end of the inner tube, and the primary filter element is arranged in the flange at the front end of the outer tube in close proximity to the secondary filter element.
5. The high stability gas measurement cell of claim 4, wherein: the filter element pressing cap is used for supporting the primary filter element and the secondary filter element and is fixed with the flange at the front end of the outer tube.
6. The high stability gas measurement cell of claim 1, wherein: the collimating lens is fixed by the lens fixing cylinder at the rear flange of the inner tube.
7. The high stability gas measurement cell of claim 6, wherein: the vacuum heat insulation tube is characterized by further comprising an optical fiber connector, one end of the optical fiber connector is sleeved outside the lens fixing tube, and one end of the optical fiber connector extends out of the vacuum heat insulation tube to be connected with the Y-shaped optical fiber.
8. The high stability gas measurement cell of claim 1, wherein: the air outlet nozzle is fixed on the flange at the rear end of the inner tube and is communicated with the inside of the inner tube.
9. The high stability gas measurement cell of claim 1, wherein: the inner wall of the flange at the front end of the inner tube is provided with an air guide groove which is communicated with the inside of the inner tube.
10. A meter, characterized in that: the meter is provided with a gas cell according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320881396.XU CN219870967U (en) | 2023-04-19 | 2023-04-19 | High-stability gas measurement air chamber and measuring instrument thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320881396.XU CN219870967U (en) | 2023-04-19 | 2023-04-19 | High-stability gas measurement air chamber and measuring instrument thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219870967U true CN219870967U (en) | 2023-10-20 |
Family
ID=88320014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320881396.XU Active CN219870967U (en) | 2023-04-19 | 2023-04-19 | High-stability gas measurement air chamber and measuring instrument thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219870967U (en) |
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2023
- 2023-04-19 CN CN202320881396.XU patent/CN219870967U/en active Active
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