CN218445111U - Long-optical-path gas absorption cell with adjustable optical path - Google Patents
Long-optical-path gas absorption cell with adjustable optical path Download PDFInfo
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- CN218445111U CN218445111U CN202221448647.7U CN202221448647U CN218445111U CN 218445111 U CN218445111 U CN 218445111U CN 202221448647 U CN202221448647 U CN 202221448647U CN 218445111 U CN218445111 U CN 218445111U
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Abstract
The utility model belongs to the technical field of exhaust gas monitoring equipment, a long optical path gas absorption cell with adjustable light path is provided, long optical path gas absorption cell with adjustable light path includes the shell, the both ends of shell are provided with lens unit and speculum unit respectively, be connected with optic fibre input interface, optic fibre output interface and lens inclination regulator on the lens unit, the both ends of shell still are provided with the gas circuit interface respectively. The utility model discloses in be provided with lens inclination regulator, can adjust the inclination of lens to can adjust the light path, ensure that light can accurately incide the optical fiber output interface, solve the problem that the current gaseous absorption cell manual assembly of long light journey and the debugging lens degree of difficulty are big.
Description
Technical Field
The utility model belongs to exhaust-gas monitoring equipment field especially relates to a long light gas absorption pond with adjustable light path.
Background
With the development of industry, more and more occasions require real-time measurement and analysis of on-site environmental gas, and monitoring gas mainly comprises SO2, NO2 and the like. The components such as SO2, NO2, etc. in the exhaust gas are generally monitored by an ultraviolet spectrometer. The absorption cell light path structure of present ultraviolet spectrum analyzer mainly adopts the single light path of turning back, and this light path optical distance is shorter, and gas is insufficient to the absorption of ultraviolet light, only is applicable to the higher operating mode of gas concentration that awaits measuring, can't be applicable to the gas monitoring of ultralow range. Other long-optical-path air chambers such as a White pool, a Herriott pool, a CMR pool and the like adopt a method of reflecting light beams by an optical element for multiple times to improve the optical path, but the requirements on the processing precision and the fixing precision of a fixing piece of the optical element are extremely high, and the debugging difficulty is extremely high.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the utility model is to provide a long optical path gas absorption cell with adjustable light path has solved the current assembly of long optical path gas absorption cell and has debugged the big problem of the lens degree of difficulty.
The utility model adopts the following technical scheme:
the long-optical-path gas absorption cell with the adjustable optical path comprises a shell, wherein a lens unit and a reflector unit are respectively arranged at two ends of the shell, an optical fiber input interface, an optical fiber output interface and a lens inclination angle adjuster are connected to the lens unit, and gas path interfaces are respectively arranged at two ends of the shell.
Further, the lens unit includes the lens end cover, lens inclination angle regulator has two and all installs on the lens end cover, two all be connected with focal length adjustment ware on the lens inclination angle regulator, optic fibre input interface and optic fibre output interface connect respectively on two focal length adjustment ware, two still install ultraviolet incident lens and ultraviolet outgoing lens on the lens inclination angle regulator respectively, still install the ultraviolet reflection level crossing on the lens end cover.
Furthermore, the reflector unit comprises a reflector end cover, and two ultraviolet reflection concave mirrors are mounted on the ultraviolet reflector end cover.
Further, it has two circular shape jacks, two to open on the lens end cover lens inclination angle adjuster inserts respectively in two jacks, lens inclination angle adjuster inserts the one end of jack and forms the arc outstanding face, the jack bottom form with arc outstanding face complex concave surface, arc outstanding face is equipped with circular silica gel sealing washer with the concave surface junction, ultraviolet incident lens and ultraviolet emergent lens are installed respectively two in the mounting groove on the arc outstanding face.
Furthermore, the joints of the lens end cover and the shell, and the joints of the reflector end cover and the shell are provided with square silica gel sealing rings.
Furthermore, the air path interface is a universal barb type elbow.
Furthermore, the bottom of the shell is provided with a heating piece patch with gum.
Furthermore, a plurality of waist-shaped holes are formed in the lens inclination angle adjuster, stud screws penetrate through the waist-shaped holes and are screwed into the lens end cover.
The utility model has the advantages that:
1. the angle of the optical element in the long-optical-path gas absorption cell with the adjustable optical path can be adjusted through the lens angle adjuster, the influence of the position error of the optical element in the ultraviolet curing process on the optical path is avoided, and the assembling and debugging difficulty is effectively reduced.
2. The long-optical-path gas absorption cell with the adjustable optical path solves the problem that the existing long-optical-path gas absorption cell has high processing precision requirement, and reduces the production cost of the long-optical-path gas absorption cell.
3. The long-optical-path gas absorption cell with the adjustable optical path effectively improves the performance consistency of the batch long-optical-path gas absorption cell.
Drawings
Fig. 1 is a schematic view of a three-dimensional structure of a long optical path gas absorption cell provided by the present invention.
Fig. 2 is a sectional view of the long optical path gas absorption cell provided by the present invention.
Fig. 3 is an exploded view of a part of the structure of the long optical path gas absorption cell provided by the present invention.
Detailed Description
In order to make the patent objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Only portions related to the embodiments of the present invention are shown for convenience of explanation.
It is shown in combination with fig. 1 that long optical path gas absorption cell with adjustable light path includes shell 1, be provided with in the recess of shell 1 bottom and take gum heating plate subsides 2, shell 1 passes through gas absorption cell fixed block 3 to be fixed at quick-witted incasement, the both ends of shell 1 are provided with lens unit 4 and speculum unit 5 respectively, be connected with optic fibre input interface 6, optic fibre output interface 7 and lens inclination regulator 8 on the lens unit 4, the both ends of shell 1 still are provided with gas circuit interface 9 respectively, gas circuit interface 9 is universal barb formula elbow.
Light emitted by an ultraviolet light source enters the lens unit through the optical fiber input interface, the light enters the reflector unit after being refracted by the lens unit, the reflector unit reflects the light back to the lens unit, the light is output to the optical fiber from the optical fiber output interface, and the light enters analytical instruments such as a spectrometer after being transmitted by the optical fiber. The inclination angle of the lens can be changed by operating the lens inclination angle adjuster, so that the light path is changed, and the optical fiber can be ensured to be accurately incident to the optical fiber output interface. And gas enters the interior of the shell from one of the gas circuit interfaces and then is discharged out of the shell from the other gas circuit interface. The air passage interface is a universal barb type elbow, and the installation is simple and convenient.
Combine shown in fig. 2 and 3, as a preferred structure, lens unit 4 includes lens end cover 41, lens inclination angle regulator 8 has two and all installs on lens end cover 41, two 8 all are connected with focal length adjuster 42 on the lens inclination angle regulator, optical fiber input interface 6 and optical fiber output interface 7 are connected respectively on two focal length adjuster 42, two still install ultraviolet incident lens 43 and ultraviolet outgoing lens 44 on the lens inclination angle regulator 8 respectively, still install ultraviolet reflection level crossing 45 on the lens end cover 41. The reflector unit 5 includes a reflector end cap 51, and two ultraviolet reflecting concave mirrors 52 are mounted on the ultraviolet reflector end cap 51. The lens unit and the reflector unit are provided with a plurality of lenses and reflectors, and after light rays are refracted by the lenses and reflected by the reflectors, the light path is greatly prolonged.
Combine fig. 2 and fig. 3 to show, as a preferred structure, it has two circular shape jacks 411, two to open on the lens end cover 41 lens inclination regulator 8 inserts respectively in two jacks 411, the one end that lens inclination regulator 8 inserted jack 411 forms the arc protruding face, jack 411 bottom form with arc protruding face complex concave surface, arc protruding face is equipped with circular silica gel sealing washer 11 with the concave surface junction, ultraviolet incident lens 43 and ultraviolet outgoing lens 44 are installed respectively two in the mounting groove on the arc protruding face. The joints of the lens end cover 41 and the reflector end cover 51 with the shell 1 are both provided with square silica gel sealing rings 12. The arc-shaped protruding surface on the lens inclination angle adjuster is matched with the concave surface at the bottom of the jack, so that abrasion between the lens inclination angle adjuster and the lens end cover can be effectively avoided. The setting of circular silica gel sealing washer can avoid this long optical path gas absorption cell inside direct and on-the-spot operating mode air contact, is polluted by dust or other harmful substance in the operating mode air, ensures this long optical path gas absorption cell gas tightness. The square silica gel sealing ring is arranged and is also used for keeping the air tightness of the long-optical-path gas absorption pool.
The lens end cover and the reflector end cover are fixed at two ends of the shell through screws. The two focal length regulators are respectively fixed on the inclination angle regulator through screw through holes on the side edge of the lens inclination angle regulator. The ultraviolet incident lens and the ultraviolet emergent lens are respectively fixed on the two inclination angle adjusters in a UV curing mode, the ultraviolet reflecting plane mirror is fixed on the lens end cover in a UV curing mode, and the two ultraviolet reflecting concave mirrors are fixed on the reflecting mirror end cover in a UV curing mode. Each part in the long-optical-path gas absorption cell is stably installed.
Referring to fig. 3, the two lens tilt angle adjusters are respectively provided with 3 hexagonal socket head screws 10, and the two lens tilt angle adjusters are correspondingly provided with waist-shaped holes 81, and the hexagonal socket head screws 10 are screwed into the lens end caps after passing through the corresponding waist-shaped holes, so as to realize compression of the lens tilt angle adjusters. The hexagonal prism head screws at different positions are screwed, the hexagonal prism head screws drive the lens inclination angle adjuster to incline, and the lens inclination angle adjuster drives the angle of the lens mounted on the lens inclination angle adjuster to change. The arrangement of the waist-shaped hole enlarges the inclinable angle range of the lens inclination angle adjuster, and avoids the mutual interference of other parts and the lens inclination angle adjuster when the required inclination angle of the lens inclination angle adjuster is larger, thereby influencing the air tightness of the long-optical-path gas absorption cell.
The ultraviolet incident lens and the ultraviolet emergent lens are both 2 degrees inclined along the counterclockwise direction, one ultraviolet reflecting concave mirror is 1.5 degrees inclined along the counterclockwise direction, and the ultraviolet reflecting plane mirror and the other ultraviolet reflecting concave mirror have no inclination angle, so that a main light spot of incident light can be incident to the output end of the optical fiber after passing through the optical system.
The light path of the long-optical-path gas absorption cell with the adjustable light path is as follows: light emitted from an ultraviolet light source is focused by an ultraviolet incidence lens through an optical fiber input interface on one focal length adjuster, enters the long-optical-path gas absorption cell, sequentially passes through one ultraviolet reflection concave mirror, an ultraviolet reflection plane mirror and another ultraviolet reflection concave mirror, is focused by an ultraviolet emergent lens, enters optical fibers from an optical fiber output interface on the other focal length adjuster, and enters analytical devices such as a spectrometer after being transmitted by the optical fibers.
In conclusion: the utility model provides a long light journey gaseous absorption cell not only can effectively reduce the manufacturing cost and the degree of difficulty of long light journey gaseous absorption cell, and installation error has reduced the debugging degree of difficulty to the influence of long light journey gaseous absorption cell uniformity in the artifical installation of reduction that also can be very big, has also improved the performance uniformity and the measuring accuracy of final ultraviolet spectroscopy analysis appearance complete machine.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a gaseous absorption cell of long light journey with adjustable light path, its characterized in that, which comprises an outer shell, the both ends of shell are provided with lens unit and speculum unit respectively, be connected with optic fibre input interface, optic fibre output interface and lens inclination regulator on the lens unit, the both ends of shell still are provided with the gas circuit interface respectively, the lens unit includes the lens end cover, lens inclination regulator has two and all installs on the lens end cover, two all be connected with the focus regulator on the lens inclination regulator, optic fibre input interface and optic fibre output interface connect respectively on two focus regulators, two still install ultraviolet incident lens and ultraviolet outgoing lens on the lens inclination regulator respectively, still install ultraviolet reflection level crossing on the lens end cover.
2. The optical path adjustable long optical path gas absorption cell according to claim 1, wherein the optical path adjustable long optical path gas absorption cell is characterized in that
The reflecting mirror unit comprises a reflecting mirror end cover, and two ultraviolet reflecting concave mirrors are mounted on the reflecting mirror end cover.
3. The optical path adjustable long optical path gas absorption cell according to claim 2, wherein the optical path adjustable long optical path gas absorption cell is characterized in that
Two circular insertion holes are formed in the lens end cover, and the two lens inclination angle regulators are respectively inserted into the two insertion holes
In the hole, one end of the lens inclination angle regulator inserted into the jack forms an arc-shaped protruding surface, and the bottom of the jack is provided with a groove
A concave surface matched with the arc-shaped protruding surface is formed, and a circular silica gel seal is arranged at the joint of the arc-shaped protruding surface and the concave surface
The ultraviolet incident lens and the ultraviolet emergent lens are respectively arranged on the two arc-shaped protruding surfaces
And (6) loading in the groove.
4. The optical path adjustable long optical path gas absorption cell according to claim 1, wherein the optical path adjustable long optical path gas absorption cell is characterized in that
And square silica gel sealing rings are arranged at the joints of the lens end cover and the shell and the joints of the reflector end cover and the shell.
5. The optical path adjustable long optical path gas absorption cell according to claim 1, wherein the optical path adjustable long optical path gas absorption cell
The air passage interface is a universal barb type elbow.
6. The optical path adjustable long optical path gas absorption cell according to claim 5, wherein the optical path adjustable long optical path gas absorption cell is characterized in that
The bottom of the shell is provided with a heating piece patch with gum.
7. The optical path adjustable long optical path gas absorption cell according to claim 3, wherein
The lens inclination angle regulator is provided with a plurality of waist-shaped holes, and stud screws are inserted into the waist-shaped holes and screwed into the lens end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221448647.7U CN218445111U (en) | 2022-06-11 | 2022-06-11 | Long-optical-path gas absorption cell with adjustable optical path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221448647.7U CN218445111U (en) | 2022-06-11 | 2022-06-11 | Long-optical-path gas absorption cell with adjustable optical path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218445111U true CN218445111U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221448647.7U Active CN218445111U (en) | 2022-06-11 | 2022-06-11 | Long-optical-path gas absorption cell with adjustable optical path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218445111U (en) |
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2022
- 2022-06-11 CN CN202221448647.7U patent/CN218445111U/en active Active
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