CN210071648U - Triple optical path air chamber and gas detection equipment - Google Patents
Triple optical path air chamber and gas detection equipment Download PDFInfo
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- CN210071648U CN210071648U CN201920822390.9U CN201920822390U CN210071648U CN 210071648 U CN210071648 U CN 210071648U CN 201920822390 U CN201920822390 U CN 201920822390U CN 210071648 U CN210071648 U CN 210071648U
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Abstract
The utility model provides a triple optical path air chamber and gaseous check out test set, including light source, air chamber body and spectrum appearance, a through-hole is respectively established at air chamber body both ends, installs coaxial arrangement, concave surface in the through-hole towards the first concave surface speculum and the second concave surface speculum of air chamber, and two concave surface speculum centers are provided with logical unthreaded hole, air chamber body one side is provided with rectangular shape opening, installs the apron on the opening, the light source is installed to air chamber one end, and the emission point of light source is located the focus of second concave surface speculum, and the spectrum appearance is installed to the air chamber other end, and the photic point of spectrum appearance is located the focus of first concave surface speculum. The utility model has simple optical structure and high stability; the same volume of the air chamber realizes 3 times of optical path effect, and the air chamber has small relative volume and long optical path. The detachable cover plate is arranged on the air chamber, so that the inner surface of the reflector can be detached for simple wiping, the light path does not need to be corrected again, and the maintenance difficulty of the equipment is reduced.
Description
Technical Field
The utility model belongs to gaseous check out test set field especially relates to a triple optical path air chamber and gaseous check out test set.
Background
The optical absorption method is increasingly applied to the detection of each gaseous component of gas, and the detection equipment used by the method mainly comprises a light source, a gas chamber and a photoelectric detector. The longer the optical path of the light emitted by the light source in the gas to be detected passes through, the more remarkable the obtained signal is, and the lower the detection limit is, the higher the detection precision is. However, the increase of the optical path often brings the increase of the volume of the air chamber, and limits the use of the pollutant detection instrument, especially the long-optical-path air chamber on the portable detection instrument, so that the optical path is increased by adopting a mode of turning back and forth through light rays in many existing gas pollutant detection instruments. In order to ensure that the optical signal received by the photoelectric detector is strong enough, an additional convergence device is required, but the complexity of the structure of the air chamber is increased, and the optical stability of the air chamber is reduced.
The utility model discloses an application number 201620712634.4 proposes an optical absorption cell, and it makes the optical path increase 1 times optical path through once reflecting, but the volume is great, and air chamber optical utilization is low to emergent light needs to be connected to the spectrum appearance through optic fibre.
The utility model discloses a utility model patent application number 201520057478.8 provides a gas absorption cell, has adopted 4 prisms to make the structure of 5 times optical path that light was turned back, and although the optical path is longer, light does not overlap, and this absorption cell optics utilization ratio is low, and is bulky. The collimation requirement for the light is high since there is no reconvergence during the propagation of the light, and once the prism inner walls are contaminated, it is difficult to wipe.
SUMMERY OF THE UTILITY MODEL
The utility model discloses air chamber volume to current gas detection equipment is great relatively, and the optical distance is shorter relatively, and the optical lens piece is not convenient for clean's technical problem, provides an optical stability height, the triple optical distance air chamber and the gaseous check out test set of being convenient for clean.
In order to achieve the above object, the utility model discloses a technical scheme be:
the utility model provides a triple optical path air chamber, includes the air chamber body, a through-hole is respectively established at air chamber body both ends, installs coaxial arrangement, concave surface in the through-hole towards the first concave surface speculum and the second concave surface speculum of air chamber, and first concave surface speculum and second concave surface speculum center are provided with logical unthreaded hole, air chamber body one side is provided with rectangular shape opening, installs the apron on the opening.
Preferably, the cover plate is provided with a light adjusting hole, a light intensity adjusting device is installed in the light adjusting hole, the light intensity adjusting device comprises a light blocking sheet located in the air chamber, and a fixing seat capable of rotating in the light adjusting hole is connected to the lower portion of the light blocking sheet.
Preferably, the fixing seat comprises an L-shaped mounting plate, a stud and a bolt mounted below the stud, which are connected in sequence.
Preferably, the reflective surfaces of the first and second concave mirrors are located on convex surfaces.
Preferably, an O-ring is installed between the dimming hole and the stud.
The utility model also provides a gaseous check out test set, including foretell triple optical path air chamber, the light source is installed to air chamber one end, and the launching point of light source is located the focus of second concave surface speculum, and photoelectric sensor is installed to the air chamber other end, and photoelectric sensor's photic point is located the focus of first concave surface speculum.
Preferably, the first concave reflector and the first concave reflector comprise spherical lenses, and the outer surfaces of the spherical lenses except for the light through holes are coated with a reflecting layer.
Preferably, the light source is ultraviolet light.
Preferably, a gasket is arranged between the cover plate and the elongated opening.
Preferably, the cover plate is provided with an air inlet nozzle and an air outlet nozzle.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the two concave reflectors are respectively glued to two ends of the air chamber, so that the light is converged, the air chamber is sealed, the optical structure of the air chamber is simple, and the stability is high; the same volume of the air chamber realizes 3 times of optical path effect, and the air chamber has small relative volume and long optical path.
2. The reflecting layers of the two concave reflecting mirrors are positioned outside the air chamber and cannot be corroded by corrosive gas in the air chamber.
3. The detachable cover plate is arranged on the air chamber, so that the inner surface of the reflector can be detached for simple wiping, the light path does not need to be corrected again, and the maintenance difficulty of the equipment is reduced.
4. The light intensity adjusting device is arranged in the air chamber, so that the continuous adjustment from no light to the maximum light transmission amount can be realized, optical parts do not need to be adjusted during adjustment, and the adjustment is convenient and fast.
Drawings
FIG. 1 is a schematic view of the overall structure of the gas detection device of the present invention;
FIG. 2 is an exploded view of the gas detection apparatus of the present invention;
fig. 3 is a transverse sectional view of the gas detection apparatus of the present invention;
FIG. 4 is a schematic structural view of a light intensity adjusting device of the gas detecting apparatus of the present invention;
fig. 5 is a schematic structural diagram of the gas detection apparatus of the present invention.
In the above figures: 1. a light source; 11. a light source adapter plate; 2. a gas chamber body; 21. a left end plate; 211. a through hole; 22. a right end plate; 23. a top wall; 24. a front wall; 241. an opening; 25. a cover plate; 251. an air inlet nozzle; 252. an air outlet nozzle; 3. a spectrometer; 31. a spectrometer adapter plate; 4. a first concave mirror; 41. a light through hole; 42. a reflective layer; 5. a second concave reflector; 6. a light intensity adjusting device; 61. a light blocking sheet; 62. a fixed seat; 621. an L-shaped mounting plate; 622. a stud; 623. and (4) bolts.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.
In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", and the like, which describe the orientation, are used for descriptive purposes only and are not to be construed as limiting the present invention.
Example (b): as shown in fig. 1, a gas detection apparatus for detecting gaseous pollutants in a gas includes a light source 1, a triple optical path gas chamber, and a photoelectric sensor for receiving photoelectric signals, and a spectrometer 3 is used in this embodiment. The triple optical path gas chamber comprises a gas chamber body 2, wherein the gas chamber body 2 comprises a left end plate 21 and a right end plate 22 which are positioned at two ends in the length direction, and a top wall 23, a bottom wall, a front wall 24 and a rear wall which are connected with the left end plate 21 and the right end plate 22, so that a space for containing gas is formed, and the inner space of the embodiment is cylindrical. The left end plate 21 is provided with the light source 1 through the light source adapter plate 11, and the right end plate 22 is provided with the spectrometer 3 through the spectrometer adapter plate 31.
The front wall 24 is provided with a strip-shaped opening 241, the opening 241 is provided with a cover plate 25 through a screw, and the cover plate 25 is provided with an air inlet nozzle 251 and an air outlet nozzle 252. In order to ensure the sealing performance of the air chamber, a sealing strip is arranged between the opening 241 and the end cover.
As shown in fig. 2-4, two ends of the air chamber body 2 are respectively provided with a through hole 211, the inner diameter of the through hole is larger than the inner diameter of the air chamber, a first concave reflector 4 and a second concave reflector 5 which are coaxially arranged and have concave surfaces facing the air chamber are glued in the through hole 211, and the centers of the first concave reflector 4 and the second concave reflector 5 are provided with light through holes 41. The first concave reflecting mirror 4 and the first concave reflecting mirror 4 comprise spherical lenses, and the outer surfaces of the spherical lenses except for the light passing holes 41 are coated with a reflecting layer 42. The light through hole 41 is formed by only coating the reflecting layer 42 and leaving a blank, or a small hole is formed by etching after the reflecting layer is completely coated, and the glass carrier of the concave reflector does not need to be punched through, so that the processing is convenient. The light source 1 selects ultraviolet light, the emission point of the light source 1 is positioned on the focus of the second concave reflecting mirror 5, and the light receiving point of the spectrometer 3 is positioned on the focus of the first concave reflecting mirror 4.
The two concave reflectors are respectively glued to two ends of the air chamber, so that the function of converging light rays is achieved. But also has the function of sealing the air chamber, and the air chamber has simple optical structure and high stability. The reflective layers 42 of the two concave mirrors are located outside the gas chamber and are not attacked by the corrosive gas in the gas chamber. If because the gas that awaits measuring contains the material that can pollute the light path, make the concave surface pollution of concave surface speculum cause the light loss rate too big, removable apron 25 carries out simply to clean the speculum inner surface, need not to proofread and correct the light path again, has reduced the maintenance degree of difficulty of equipment.
The cover plate 25 is further provided with a dimming hole, the dimming hole is internally provided with a light intensity adjusting device 6, and an O-shaped ring is arranged between the dimming hole and the stud 622 to ensure the sealing of the air chamber. The light intensity adjusting device 6 comprises a light blocking sheet 61 positioned in the air chamber, and a fixed seat 62 capable of rotating in the dimming hole is connected below the light blocking sheet 61. The light barrier 61 is of small thickness, less than one fifth of the cross-sectional dimension of the chamber. The light blocking sheet 61 may be adhered to the fixing base 62, or may be welded. The fixing base 62 of this embodiment includes an L-shaped mounting plate 621, a stud 622, and a bolt 623 connected in sequence. The light blocking sheet 61 is mounted on one surface of the L-shaped mounting plate 621 by a screw, a stud 622 is screwed on the other surface of the L-shaped mounting plate 621, and a bolt 623 is screwed on the lower end of the stud 622. When the light blocking sheet 61 is used, the light blocking sheet 61 extends into the air chamber, the fixing seat 62 is installed in a hole in the side wall of the air chamber, the L-shaped mounting plate 621 is located in the side wall of the air chamber, the L-shaped mounting plate 621 and the bolt 623 are clamped on the side wall of the air chamber, and the tightness of the light blocking sheet 61 can be adjusted by adjusting the position of the bolt 623. In order to facilitate the adjustment of the angle of the light blocking plate 61, a notch is formed in the lower surface of the stud 622, and the stud 622 can be rotated by inserting a sheet-like tool such as a screwdriver into the notch, thereby changing the angle of the light blocking plate 61.
When the plane of the light-blocking sheet 61 is parallel to the optical axis of the gas cell, the light-blocking sheet 61 blocks little light energy; after the fixing seat 62 is rotated, the plane of the light blocking sheet 61 is no longer parallel to the optical axis in the air chamber, and the light blocking section is gradually increased along with the increase of the angle until the light energy passing through the plane of the light blocking sheet 61 is the minimum when the plane is perpendicular to the optical axis. When the size of the light blocking sheet 61 is large enough, the light blocking sheet can be continuously adjusted from no light to the maximum light transmission amount, and optical parts do not need to be adjusted during adjustment, so that the light blocking sheet is convenient and quick.
When the light source 1 adopts a pulse light source 1 such as a pulse xenon lamp, the phenomenon that the energy of emergent light is too high to cause saturation distortion of the spectrometer 3 often occurs, and the light flux can be changed by rotating the light adjusting device, so that the energy of the emergent light of the air chamber is in the dynamic range of the spectrometer 3.
As shown in fig. 5, light emitted from the light source 1 passes through the light hole at the center of the first concave mirror 4 and irradiates the second concave mirror 5, becomes parallel light and returns to irradiate the first concave mirror 4, becomes converged light and irradiates the light hole at the center of the second concave mirror 5, and then exits to the entrance slit of the spectrometer 3 and is received by the spectrometer 3. The same volume of the air chamber realizes 3 times of optical path effect, and the air chamber has small relative volume and long optical path; the whole optical system does not need to use optical fibers, has a compact structure, improves the stability of an optical path and reduces the cost.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A triple optical path gas cell, characterized by: including the air chamber body, a through-hole is respectively established at air chamber body both ends, installs coaxial arrangement, concave surface in the through-hole towards the first concave surface speculum and the second concave surface speculum of air chamber, and first concave surface speculum and second concave surface speculum center are provided with logical unthreaded hole, air chamber body a side is provided with rectangular shape opening, installs the apron on the opening.
2. The triple optical path gas cell of claim 1, wherein: the cover plate is provided with a light adjusting hole, a light intensity adjusting device is installed in the light adjusting hole, the light intensity adjusting device comprises a light blocking sheet located in the air chamber, and a fixing seat capable of rotating in the light adjusting hole is connected below the light blocking sheet.
3. The triple optical path gas cell of claim 2, wherein: the fixing seat comprises an L-shaped mounting plate, a stud and a bolt arranged below the stud, wherein the L-shaped mounting plate and the stud are sequentially connected.
4. The triple optical path gas cell of claim 1, wherein: the reflecting surfaces of the first concave reflecting mirror and the second concave reflecting mirror are positioned on the convex surface.
5. The triple optical path gas cell of claim 2, wherein: and an O-shaped ring is arranged between the dimming hole and the stud.
6. A gas detection apparatus, characterized by: the triple optical path gas cell of any one of claims 1 to 5, wherein a light source is arranged at one end of the gas cell, the emission point of the light source is positioned at the focus of the second concave reflector, a photoelectric sensor is arranged at the other end of the gas cell, and the light receiving point of the photoelectric sensor is positioned at the focus of the first concave reflector.
7. The gas detection apparatus according to claim 6, characterized in that: the first concave reflector and the first concave reflector comprise spherical lenses, and the outer surfaces of the spherical lenses except the light through holes are coated with reflecting layers.
8. The gas detection apparatus according to claim 6, characterized in that: the light source is ultraviolet light.
9. The gas detection apparatus according to claim 6, characterized in that: and a sealing gasket is arranged between the cover plate and the strip-shaped opening.
10. The gas detection apparatus according to claim 6, characterized in that: and the cover plate is provided with an air inlet nozzle and an air outlet nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822390.9U CN210071648U (en) | 2019-06-03 | 2019-06-03 | Triple optical path air chamber and gas detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822390.9U CN210071648U (en) | 2019-06-03 | 2019-06-03 | Triple optical path air chamber and gas detection equipment |
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| Publication Number | Publication Date |
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| CN210071648U true CN210071648U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920822390.9U Active CN210071648U (en) | 2019-06-03 | 2019-06-03 | Triple optical path air chamber and gas detection equipment |
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| CN (1) | CN210071648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062290A (en) * | 2021-11-30 | 2022-02-18 | 青岛崂应海纳光电环保集团有限公司 | Long-optical-path air chamber optical path detection method and device |
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2019
- 2019-06-03 CN CN201920822390.9U patent/CN210071648U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062290A (en) * | 2021-11-30 | 2022-02-18 | 青岛崂应海纳光电环保集团有限公司 | Long-optical-path air chamber optical path detection method and device |
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Address after: 266000 No. 1, Yueyang Road, Chengyang District, Qingdao City, Shandong Patentee after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 266000 No. 1, Yueyang Road, Chengyang District, Qingdao City, Shandong Patentee before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |