CN213600576U - Large-optical-path laser gas absorption tank - Google Patents
Large-optical-path laser gas absorption tank Download PDFInfo
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- CN213600576U CN213600576U CN202022474962.4U CN202022474962U CN213600576U CN 213600576 U CN213600576 U CN 213600576U CN 202022474962 U CN202022474962 U CN 202022474962U CN 213600576 U CN213600576 U CN 213600576U
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- air chamber
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- absorption cell
- gas absorption
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Abstract
The utility model belongs to the technical field of gaseous check out test set. A large-optical-distance laser gas absorption cell comprises a gas chamber cylinder, a first mounting seat, a second mounting seat, a gas chamber column, a concave surface reflector, a plane reflector, a detector and an optical collimator, wherein the first mounting seat is arranged at a first end part of the gas chamber cylinder; the second mounting seat is arranged at the second end part of the air chamber cylinder; the air chamber column is arranged between the first mounting seat and the second mounting seat, and an air inlet hole and an air outlet hole which are communicated with the air chamber cylinder are respectively arranged on the first mounting seat and the second mounting seat; the concave reflector is arranged on the first mounting seat; the plane reflective mirror is arranged on the second mounting seat, and the plane reflective mirror and the concave reflective mirror are oppositely arranged; the detector is arranged on the first mounting seat; the optical collimator is arranged on the second mounting seat. This application has less size, great optical path through reasonable structural design, possesses higher detectivity and accuracy.
Description
Technical Field
The utility model belongs to the technical field of gaseous check out test set, concretely relates to big optical path laser gas absorption cell.
Background
In industry and life, various gases are generated, which are harmful to the environment or cause dangerous situations. The discovery and treatment of these gases requires accurate detection by the detection equipment. The laser gas detection equipment has the advantages of good accuracy, high sensitivity, strong anti-interference capability and the like.
However, the existing equipment is inconvenient to adjust, cannot correct the detection precision through temperature, has poor adaptability to the environment, can cause influence on the mirror precision by an assembly structure in the assembly process, and still needs to be further improved in the aspects of precision and interference resistance; in addition, in the prior art, the adjustment of the light source and the detector is constant, the structural connection is unreliable, the received signal is poor, and the sensitivity is low.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides a large-optical-path laser gas absorption cell which has a smaller size, a larger optical path and higher detection sensitivity and accuracy through reasonable structural design.
In order to realize the purpose, the adopted technical scheme is as follows:
a large optical path laser gas absorption cell comprising:
an air chamber cylinder;
a first mounting seat provided at a first end portion of the air chamber tube;
a second mounting seat arranged at a second end of the air chamber cylinder;
the air chamber column is arranged between the first mounting seat and the second mounting seat, and an air inlet hole and an air outlet hole which are communicated with the air chamber cylinder are respectively arranged on the first mounting seat and the second mounting seat;
a concave reflective mirror disposed on the first mount;
the plane reflector is arranged on the second mounting seat, and the plane reflector and the concave reflector are oppositely arranged;
a detector disposed on the first mount; and
an optical collimator disposed on the second mount.
According to the utility model discloses gaseous absorption cell of big optical path laser, preferably, the detector with between the first mount pad optical collimator with all be provided with two-dimentional adjusting unit between the second mount pad, two-dimentional adjusting unit includes:
the first adjusting plate is connected with the corresponding mounting seat through a first bolt, and a first strip-shaped adjusting hole corresponding to the first bolt is formed in the first adjusting plate; and
the second regulating plate, its with first regulating plate passes through second bolted connection be provided with on the second regulating plate with the second bar regulation hole that the second bolt corresponds, the setting of detector or the optics alignment ware that corresponds is in on the second regulating plate, first bar regulation hole with the regulation direction in second bar regulation hole is arranged perpendicularly.
According to the utility model discloses big optical path laser gas absorption cell, preferably, first regulating plate with be provided with first guide way and second guide way on the second regulating plate respectively, all be provided with the first guide post that corresponds with the first guide way that corresponds on first mount pad and second mount pad, still be provided with the second guide post that corresponds with the second guide way on the first regulating plate.
According to the utility model discloses big optical path laser gas absorption cell, preferably, the both ends of air chamber post all be provided with the gas transmission passageway of inlet port and venthole intercommunication, just all be the gas pocket that a plurality of and corresponding gas transmission passageway intercommunication had been laid to the circumference on the lateral wall at air chamber post both ends.
According to the utility model discloses big optical path laser gas absorption cell, preferably, first mount pad with all be provided with the heavy groove of assembly on the second mount pad, concave surface reflector and plane reflector pass through silica gel to be fixed at the heavy inslot of assembly that corresponds.
According to the large optical path laser gas absorption cell of the present invention, preferably, the first mounting seat and the concave surface reflective mirror are provided with through holes corresponding to the detector; through holes corresponding to the optical calibrator are formed in the second mounting seat and the plane reflector;
and the first mounting seat and the through hole on the second mounting seat are provided with a light-transmitting mirror in a matching manner.
According to the utility model discloses big optical path laser gas absorption cell, preferably, an air chamber section of thick bamboo inner wall inlays and is equipped with the polytetrafluoroethylene inside lining, the upper portion of an air chamber section of thick bamboo is provided with the apron, the apron with an air chamber section of thick bamboo passes through bolted connection, just is in an air chamber section of thick bamboo with be provided with the sealing washer between the apron, an air chamber section of thick bamboo lower part is provided with the bottom plate.
According to the utility model discloses big optical path laser gas absorption cell, preferably, bottom plate, first mount pad, second mount pad, apron are the aluminum alloy material.
According to the utility model discloses big optical path laser gas absorption cell, preferably, the equal gilding in surface of concave surface reflector and plane reflector.
According to the utility model discloses big optical path laser gas absorption cell, preferably, still include the temperature detect sensor, be provided with the mounting hole on the air chamber section of thick bamboo lateral wall, the temperature detect sensor passes through the heat conduction glue to be fixed in the mounting hole.
By adopting the technical scheme, the beneficial effects are as follows:
this application has less size, great optical path through reasonable structural design, possesses higher detectivity and accuracy.
The inner wall of the air chamber cylinder is nested with the lining made of polytetrafluoroethylene, so that the corrosion resistance of the air chamber is improved, and the service life is prolonged; the gas chamber column in the gas chamber cylinder can reduce the gas volume, reduce the gas consumption, simultaneously make the gas flow more smooth and easy, improve detection efficiency.
The optical calibrator adjusts the unit through two dimensions and adjusts from top to bottom and from left to right, can satisfy the needs of adjusting in the certain limit to make the inside facula of air chamber even, and reach required optical path. The structure is convenient to adjust and stable and reliable to fix. The detector is also adjusted up, down, left and right through the two-dimensional adjusting unit, and the adjusting requirement in a certain range can be met. This application adjusts the detector position through this structural design, makes the signal intensity who receives the biggest, improve equipment's sensitivity.
The utility model provides two embedded temperature sensor on optical path pond air chamber section of thick bamboo wall, temperature sensor pass through the heat-conducting glue to be fixed downtheholely, detectable gas temperature to revise gas concentration detection precision through the temperature, improve the adaptability of detecting precision and instrument and equipment to temperature environment.
The utility model provides a speculum is fixed in the mount pad that corresponds through the silica gel that has the pliability, and with the metalwork direct contact not, can avoid applying the effort to the mirror, avoid the decline of mirror shape of face precision, effectively guarantee the instrument precision. Meanwhile, the influence of the difference of the expansion and contraction quantities of the metal and the mirror on the mirror, which is better than the temperature change, can be relieved, and the stability of the precision of the instrument at different temperatures is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.
Fig. 1 is a schematic perspective view of a large optical path laser gas absorption cell according to an embodiment of the present invention.
Fig. 2 is a second schematic perspective view of a large-optical-path laser gas absorption cell according to an embodiment of the present invention.
Fig. 3 is a schematic side view of a large optical path laser gas absorption cell according to an embodiment of the present invention.
Fig. 4 is a schematic view of the structure in the direction of a-a in fig. 3.
Fig. 5 is a schematic view of the structure in the direction B-B in fig. 4.
Number in the figure:
100 is an air chamber cylinder, 101 is an assembly sink groove, 102 is silica gel, 103 is a cover plate, 104 is a sealing ring, 105 is a polytetrafluoroethylene lining, and 106 is a bottom plate;
210 is a first mounting seat, 211 is a concave reflector, 212 is an air inlet, 213 is a transparent mirror, and 214 is a detector; 220 is a second mounting seat, 221 is a plane reflector, 222 is an air outlet hole, and 223 is an optical collimator; 230 is a two-dimensional adjusting unit, 231 is a first adjusting plate, 232 is a second adjusting plate, 233 is a first strip-shaped adjusting hole, and 234 is a second guide groove;
300 is an air chamber column, 301 is an air transmission channel, and 302 is an air hole.
Detailed Description
Illustrative aspects of embodiments of the invention are described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the invention are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art.
In the description of the present invention, it should be understood that the terms "first" and "second" are used to describe various elements of the invention, and are not intended to limit any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience in describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.
Referring to fig. 1 to 5, the present application discloses a large optical path laser gas absorption cell, which includes a gas chamber cylinder 100, a first mounting seat 210, a second mounting seat 220, a gas chamber column 300, a concave reflective mirror 211, a planar reflective mirror 221, a detector 214 and an optical collimator 223, wherein the first mounting seat 210 is disposed at a first end of the gas chamber cylinder 100; the second mount 220 is disposed at a second end of the air cell cartridge 100; the air chamber column 300 is arranged between the first mounting seat 210 and the second mounting seat 220, and the first mounting seat 210 and the second mounting seat 220 are respectively provided with an air inlet hole 212 and an air outlet hole 222 communicated with the air chamber cylinder 100; the concave optical reflector 211 is disposed on the first mount 210; the plane reflective mirror 221 is arranged on the second mounting seat 220, and the plane reflective mirror 221 and the concave reflective mirror 211 are oppositely arranged; the probe 214 is disposed on the first mount 210; an optical collimator 223 is disposed on the second mount 220.
Preferably, in the present application, two-dimensional adjusting units 230 are disposed between the detector 214 and the first mounting base 210, and between the optical collimator 223 and the second mounting base 220, each two-dimensional adjusting unit 230 includes a first adjusting plate 231 and a second adjusting plate 232, the first adjusting plate 231 is connected with the corresponding mounting base through a first bolt, and a first strip-shaped adjusting hole 233 corresponding to the first bolt is disposed on the first adjusting plate 231; the second adjusting plate is connected with the first adjusting plate through a second bolt, a second strip-shaped adjusting hole corresponding to the second bolt is formed in the second adjusting plate, a corresponding detector or an optical collimator is arranged on the second adjusting plate, and the adjusting directions of the first strip-shaped adjusting hole and the second strip-shaped adjusting hole are perpendicular to each other. Further, a first guide groove and a second guide groove 234 are respectively arranged on the first adjusting plate and the second adjusting plate, a first guide post corresponding to the corresponding first guide groove is arranged on each of the first mounting seat and the second mounting seat, and a second guide post corresponding to the second guide groove is arranged on the first adjusting plate. According to the structure, the first adjusting plate can be adjusted left and right relative to the mounting seat, the second adjusting plate can be adjusted up and down relative to the first adjusting plate, so that two-dimensional adjustment is achieved, the detector or the optical collimator is arranged on the second adjusting plate, therefore, the detector or the optical collimator can be adjusted up and down and left and right along with the second adjusting plate, and therefore flexibility and fixing stability of overall adjustment are met. The optical calibrator adjusts the unit through two dimensions and adjusts from top to bottom and from left to right, can satisfy the needs of adjusting in the certain limit to make the inside facula of air chamber even, and reach required optical path. The structure is convenient to adjust and stable and reliable to fix. The detector is also adjusted up, down, left and right through the two-dimensional adjusting unit, and the adjusting requirement in a certain range can be met. This application adjusts the detector position through this structural design, makes the signal intensity who receives the biggest, improve equipment's sensitivity.
In this embodiment, the two ends of the air chamber column 300 are respectively provided with an air transmission channel 301 communicated with the air inlet hole 212 and the air outlet hole 222, and the side walls of the two ends of the air chamber column 300 are respectively provided with a plurality of air holes 302 communicated with the corresponding air transmission channels 301 in a circumferential manner.
The first mounting base 210 and the second mounting base 220 are respectively provided with an assembly sinking groove 101, and the concave reflective mirror 211 and the planar reflective mirror 221 are fixed in the corresponding assembly sinking grooves 101 through the silica gel 102.
Through holes corresponding to the detector are arranged on the first mounting seat 210 and the concave reflective mirror 211; through holes corresponding to the optical calibrator are formed in the second mounting seat and the plane reflector; the through holes of the first and second mounting seats 210 and 220 are provided with light-transmitting mirrors 213 in a matching manner.
The inner wall of the air chamber cylinder 100 is embedded with a polytetrafluoroethylene lining 105, the upper part of the air chamber cylinder is provided with a cover plate 103, the cover plate 103 is connected with the air chamber cylinder 100 through bolts, a sealing ring 104 is arranged between the air chamber cylinder 100 and the cover plate 103, and the lower part of the air chamber cylinder 100 is provided with a bottom plate 106. The inner wall of the air chamber cylinder is nested with the lining made of polytetrafluoroethylene, so that the corrosion resistance of the air chamber is improved, and the service life is prolonged; the gas chamber column in the gas chamber cylinder can reduce the gas volume, reduce the gas consumption, simultaneously make the gas flow more smooth and easy, improve detection efficiency.
The bottom plate 106, the first mounting seat 210, the second mounting seat 220, and the cover plate 103 are all made of aluminum alloy. The surfaces of the concave mirror 211 and the planar mirror 221 are both gold plated.
The temperature detection device further comprises a temperature detection sensor, wherein a mounting hole is formed in the side wall of the air chamber cylinder 100, and the temperature detection sensor is fixed in the mounting hole through heat-conducting glue. This application is through embedded temperature sensor on air chamber section of thick bamboo wall, and temperature sensor passes through the heat-conducting glue to be fixed downtheholely, detectable gas temperature to revise gas concentration detection precision through the temperature, improve the adaptability of detecting precision and instrument and equipment to temperature environment.
The utility model provides a speculum is fixed in the mount pad that corresponds through the silica gel that has the pliability, and with the metalwork direct contact not, can avoid applying the effort to the mirror, avoid the decline of mirror shape of face precision, effectively guarantee the instrument precision. Meanwhile, the influence of the difference of the expansion and contraction quantities of the metal and the mirror on the mirror, which is better than the temperature change, can be relieved, and the stability of the precision of the instrument at different temperatures is improved.
One end is the plane reflector in the air chamber section of thick bamboo of this application, and other one end is the concave surface reflector, and the surface all is gilded. The laser emitted by the light source enters the light chamber cylinder through the optical collimator, hits the concave surface reflector, is reflected to the plane reflector through the reflecting surface with a certain curvature, and is reflected back to the concave surface reflector again. So as to form a light line network with uniform circumference in the air chamber cylinder by the reciprocating reflection. The larger the number of reflections, the larger the optical path length and the higher the detection sensitivity. The air enters from the air inlet hole, passes through the channel, enters the air chamber cavity and is discharged from the air outlet hole. During the period, the laser continuously and repeatedly passes through the gas, absorption peaks are formed in corresponding spectral bands, and the concentration of the corresponding gas is obtained through data processing.
While the preferred embodiments for carrying out the invention have been described in detail, it should be understood that they have been presented by way of example only, and not limitation as to the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art, which modifications are within the scope of the present invention.
Claims (10)
1. A large optical path laser gas absorption cell, comprising:
an air chamber cylinder;
a first mounting seat provided at a first end portion of the air chamber tube;
a second mounting seat arranged at a second end of the air chamber cylinder;
the air chamber column is arranged between the first mounting seat and the second mounting seat, and an air inlet hole and an air outlet hole which are communicated with the air chamber cylinder are respectively arranged on the first mounting seat and the second mounting seat;
a concave reflective mirror disposed on the first mount;
the plane reflector is arranged on the second mounting seat, and the plane reflector and the concave reflector are oppositely arranged;
a detector disposed on the first mount; and
an optical collimator disposed on the second mount.
2. The long-optical-distance laser gas absorption cell according to claim 1, wherein two-dimensional adjusting units are arranged between the detector and the first mounting seat and between the optical collimator and the second mounting seat, and each two-dimensional adjusting unit comprises:
the first adjusting plate is connected with the corresponding mounting seat through a first bolt, and a first strip-shaped adjusting hole corresponding to the first bolt is formed in the first adjusting plate; and
the second regulating plate, its with first regulating plate passes through second bolted connection be provided with on the second regulating plate with the second bar regulation hole that the second bolt corresponds, the setting of detector or the optics alignment ware that corresponds is in on the second regulating plate, first bar regulation hole with the regulation direction in second bar regulation hole is arranged perpendicularly.
3. The large optical path laser gas absorption cell according to claim 2, wherein the first adjustment plate and the second adjustment plate are respectively provided with a first guide groove and a second guide groove, the first mounting seat and the second mounting seat are respectively provided with a first guide post corresponding to the corresponding first guide groove, and the first adjustment plate is further provided with a second guide post corresponding to the second guide groove.
4. The macro-optical path laser gas absorption cell according to claim 1, wherein gas transmission channels communicated with the gas inlet holes and the gas outlet holes are respectively arranged at two ends of the gas chamber column, and a plurality of gas holes communicated with the corresponding gas transmission channels are respectively circumferentially arranged on the side walls at two ends of the gas chamber column.
5. The long-optical-distance laser gas absorption cell according to claim 1, wherein the first mounting seat and the second mounting seat are respectively provided with an assembly sinking groove, and the concave surface reflective mirror and the plane reflective mirror are fixed in the corresponding assembly sinking grooves through silica gel.
6. The large optical path laser gas absorption cell according to claim 1, wherein the first mounting seat and the concave reflective mirror are provided with through holes corresponding to the detector; through holes corresponding to the optical calibrator are formed in the second mounting seat and the plane reflector;
and the first mounting seat and the through hole on the second mounting seat are provided with a light-transmitting mirror in a matching manner.
7. The long-optical-distance laser gas absorption cell as claimed in claim 1, wherein a polytetrafluoroethylene lining is embedded in the inner wall of the air chamber cylinder, a cover plate is arranged at the upper part of the air chamber cylinder, the cover plate is connected with the air chamber cylinder through a bolt, a sealing ring is arranged between the air chamber cylinder and the cover plate, and a bottom plate is arranged at the lower part of the air chamber cylinder.
8. The long-optical-distance laser gas absorption cell according to claim 7, wherein the base plate, the first mounting seat, the second mounting seat and the cover plate are all made of aluminum alloy.
9. The macro laser gas absorption cell of claim 1 wherein the surfaces of the concave mirror and the planar mirror are both gold plated.
10. The long-optical-distance laser gas absorption cell as claimed in claim 1, further comprising a temperature detection sensor, wherein a mounting hole is formed in a side wall of the gas chamber cylinder, and the temperature detection sensor is fixed in the mounting hole through a heat-conducting adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474962.4U CN213600576U (en) | 2020-10-31 | 2020-10-31 | Large-optical-path laser gas absorption tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474962.4U CN213600576U (en) | 2020-10-31 | 2020-10-31 | Large-optical-path laser gas absorption tank |
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| Publication Number | Publication Date |
|---|---|
| CN213600576U true CN213600576U (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022474962.4U Active CN213600576U (en) | 2020-10-31 | 2020-10-31 | Large-optical-path laser gas absorption tank |
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|---|---|
| CN (1) | CN213600576U (en) |
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2020
- 2020-10-31 CN CN202022474962.4U patent/CN213600576U/en active Active
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