CN208013063U - A kind of absorption pool structure for small-range ultraviolet difference gas analysis - Google Patents
A kind of absorption pool structure for small-range ultraviolet difference gas analysis Download PDFInfo
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- CN208013063U CN208013063U CN201820078967.5U CN201820078967U CN208013063U CN 208013063 U CN208013063 U CN 208013063U CN 201820078967 U CN201820078967 U CN 201820078967U CN 208013063 U CN208013063 U CN 208013063U
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Abstract
The utility model is related to a kind of absorption pool structures for small-range ultraviolet difference gas analysis, including the end cap between sealing shell side and cover board；It further include the triple reflection unit inside absorption cell, the unit includes the plus lens being set in incident optical internal end surface, is set to the reflector of the absorption cell internal face opposite with end cap position and is set to the intermediate reflecting spherical mirror of end cap internal face, and the incident beam of incident optical vertically injects plus lens and projected and received from the output optical fiber with the direction for being parallel to incident beam again after the triple reflection of triple reflection unit.The utility model makes light path increase to four times by way of triple reflection, is not increasing equipment instrument, is particularly suitable for the measurement of small-range gas concentration, measures more accurate；From resistance to deformation has structurally been ensured, is conducive to safeguard and debug；It is simple in structure, stablize and is unlikely to deform.
Description
Technical field
The utility model is related to gas analysis detection techniques, more particularly to one kind being used for small-range ultraviolet difference gas analysis
Absorption pool structure.
Background technology
At present both at home and abroad in gas analysis detection, ultraviolet difference absorption process principle is widely used, basic
It is strong by difference absorption spectrum based on principle is to be tested difference absorption spectrum feature of the gas in Uv and visible light wave band
Degree carrys out the concentration of inverting gas.
Absorption cell is the special container for multiplying the sample for carrying Optical characteristics to be carried out in laboratory, is mostly rectangular
Body is mostly made with the quartz material low to absorption of UV, some light splitting liquid baths for being used for visible light analysis are mostly
Cuboid.Dividing has two sides, i.e. optical surface, contact surface.
But since the equipment instrument size of gas analyzer should not further increase, especially length direction, Standard Machine
The size of case is relatively fixed, thus absorption cell size is restricted, and light path is also just restricted.
More accurate detection is carried out to polluted gas to realize, for environmentally friendly supervisory and management departments at different levels and relevant enterprise
More accurate real time data is provided, it is small that there is an urgent need to measurement ranges, measures more accurate, the environment measuring instrument more modernized.
Those skilled in the art analyze the defect of existing known technology, how to realize gas analysis small-range
Change, so that apparatus structure is stablized anti-deformation, and be easy to debug, be the direction that those skilled in the art persevere in one's efforts always.
In conclusion the present invention is exactly on the basis of existing known technology, in conjunction with the verification of practical application, to same skill
Product structure in art field proposes that the technical solution further researched and developed with designed, these technical solutions proposed are entirely capable of solving
Problem certainly of the existing technology, while being also beneficial to the solution of numerous technical problems of same technical field and developing skill
The expansibility of scheme.
Utility model content
For disadvantages described above, the utility model provides a kind of absorption cell knot for small-range ultraviolet difference gas analysis
Structure is not increasing equipment instrument, is further increasing light path, is particularly suitable for small-range gas concentration and more accurately surveys
Amount, while solving many deficiencies of the prior art.
To achieve the above object, the utility model uses following technical scheme：
A kind of absorption pool structure for small-range ultraviolet difference gas analysis, with what is be made of sealing shell and cover board
Pond body and the incident light entered inside the pond body by incident optical is made to be received by pond body the output optical fiber and be transferred to spectrum
Instrument is analyzed, and the absorption pool structure includes：
End cap between the sealing shell side and cover board, the end cover surface are arranged side by side two and are respectively used to connect
The optical fiber connecting hole of the incident optical, the output optical fiber；
Triple reflection unit inside the absorption cell, including the convergence being set in the incident optical internal end surface are saturating
Mirror, the reflector for being set to the absorption cell internal face opposite with the end cap position and it is set to the end cap internal face
The incident beam of intermediate reflecting spherical mirror, the incident optical vertically injects the plus lens and passes through the triple reflection
It projects and receives from the output optical fiber with the direction for being parallel to the incident beam again after the triple reflection of unit.
Further include following any one for the additional structure of technical solutions of the utility model：
The reflector has at least two emitting modules；
Correspondingly, the emitting module includes that incident beam first reflection by the plus lens can be made to described
The primary event spherical mirror of intermediate reflecting spherical mirror and second of the reflected beams by the intermediate reflecting spherical mirror can be made
Finally realize third secondary reflection and by the triple reflection spherical mirror of the parallel injection of outgoing beam.
Correspondingly, the quantity of the intermediate reflecting spherical mirror increases accordingly with the increase of the reflection subassembly quantity
Add.
Further include following any one for the additional structure of technical solutions of the utility model：
The end face of the incident optical is on the focal plane of equal value of primary event spherical mirror and plus lens spectrum；
Correspondingly, the end face of the output optical fiber is on the focal plane of triple reflection spherical mirror.
For technical solutions of the utility model and the technical solution with any one additional structure, further include：
The cover board both sides open up intake interface, the outlet interface for inputting and being discharged for gas respectively, make to wait for test sample gas
It is full of closed absorption cell after intake interface inflow, is then exported again from outlet interface, to form a gas return path；
The triple reflection unit makes the measurement light path of small-range gas concentration be to measure light path using primary event component
Four times；
The sealing shell is mutually perpendicular to end cap, to make to wait for that the direction of test sample gas disengaging absorption cell goes out perpendicular to light beam
Enter the direction of absorption cell；
Preferably, the respective being disconnected between sealing shell of the end cap, cover board.
Absorption pool structure described in the utility model for small-range ultraviolet difference gas analysis has the beneficial effect that：
(1) have many advantages, such as that optical length, signal-to-noise ratio are high, light path is made to increase to four times by way of triple reflection,
In the case of not increasing equipment instrument, it is particularly suitable for the measurement of small-range gas concentration, is measured more accurate；
(2) it uses the end cap of being disconnected and incident optical is made to be set to the same face, the end face of incident optical with the output optical fiber
On the focal plane of equal value of primary event spherical mirror and plus lens spectrum, the end face of the output optical fiber is in triple reflection spherical surface
On the focal plane of mirror, this parameter designing is conducive to safeguard and debug from resistance to deformation has structurally been ensured；
(3) simple in structure, stablize and is unlikely to deform；
(4) by opening up the intake interface, the outlet interface that input and be discharged for gas respectively in cover board both sides, make to be measured
Sample gas is flowed into the intake interface implemented, and is riddled inside closed absorption cell, is then led again from the outlet interface implemented
Go out, to form a gas return path.
Description of the drawings
The utility model is described in further detail below according to attached drawing.
Fig. 1 is described in the utility model embodiment for signal inside the absorption cell of small-range ultraviolet difference gas analysis
Figure；
Fig. 2 is the side schematic view that small-range ultraviolet difference gas analysis is used for described in the utility model embodiment.
In figure：
1, incident optical；2, the output optical fiber；3, rubber seal I；4, plus lens；5, primary event spherical mirror；6, two
Secondary reflection spherical mirror；7, triple reflection spherical mirror；8, sealing shell；9, end cap；10, rubber seal II；11, outlet interface；
12, intake interface；13, cover board.
Specific implementation mode
Embodiment one
As shown in Figs. 1-2, the absorption for small-range ultraviolet difference gas analysis described in the utility model embodiment one
Pool structure, the purpose to be realized of the technical solution implemented are, solve to analyse the absorption cell knot used when detection when test sample qi leel
Structure leads to not meet applicable small-range ultraviolet difference due to can not effectively be improved on the basis of increasing own vol
The problem of gas, even and if increasing absorption cell its own volume and can not also make to be in the same side into, the output optical fiber in order to pacify
Dress safeguards, debugging, and therefore, the technical solution that the utility model is implemented includes the sealing shell 8 of pond body itself and its corresponding
Cover board 13.
The pond body structure of above-mentioned setting is further analyzed：
8 section of sealing shell implemented is L-shaped structure, and corresponding cover board 13 is set as the horizontal direction sealing top of pond body
Plate, the sealing shell 8 further include being set between sealing shell 8 and cover board 13 and for the end cap 9 of end part seal, and the end
Lid 9 in the direction of the width seals a side of pond body, and sealing means, which can be used, to be in contact in end cap 9 with sealing shell 8
Internal face appropriate position add rubber seal I3, the internal face appropriate position that cover board 13 is in contact with sealing shell 8
Add rubber seal II10；
Correspondingly, 9 surface of end cap implemented is arranged two optical fiber connecting holes arranged side by side, outside the optical fiber connecting hole implemented
Portion corresponding position is separately connected successively for making incident ray enter the incident optical 1 of absorption cell, for making emergent ray
The output optical fiber 2 for drawing absorption cell, to make the interconnecting piece concentrated setting of incident optical 1, the output optical fiber 2 respectively with absorption pond body
In the same side of absorption cell, i.e. 9 surface of end cap solves traditional incident section, exit portion is respectively at the same absorption cell
Not ipsilateral and causing safeguard with when debugging caused by it is inconvenient；
Correspondingly, 13 both sides of cover board implemented open up respectively to be inputted and the intake interface 12 of discharge, outlet for gas
Interface 11 makes to wait for that test sample gas is flowed into the intake interface 12 implemented, riddles inside closed absorption cell, then again from it is real
The outlet interface 11 applied exports, to form a gas return path, it can be seen that, the utility model by by intake interface 12 with go out
Gas interface 11 is set to 8 surface of the same sealing shell, incident optical 1, the output optical fiber 2 respectively with the interconnecting piece collection that absorbs pond body
In be set to 9 surface of the same end cap, meanwhile, the sealing shell 8 implemented is mutually perpendicular to end cap 9, to make to wait for test sample gas
The direction for passing in and out absorption cell comes in and goes out the direction of absorption cell perpendicular to light, and the accuracy of test sample headroom is waited for make light penetrate
It is further promoted, is conducive to the precision for tentatively improving detection.
Further, the setting of light path inside the pond body of above-mentioned setting is further analyzed：
Light triple reflection mode is arranged through inside the absorption cell body implemented makes light path increase four times greater triple reflection list
Member is particularly suitable for the measurement of small-range gas concentration, significantly increases light in order to not increase equipment instrument
Journey, especially suitable for causing instrument to fix, store because increasing tool length or measuring situations such as not meeting optical instrument standard.
For the triple reflection unit embodiment implemented, it is embodied as：
The setting of incident section that the incident optical 1 implemented is in inside absorption cell can make light enter concentration pond in come together in
The plus lens 4 of incident section, and 4 setting direction of plus lens falls in incident optical and sealing shell 8, and is implemented
Internal reflection body is fixedly mounted in the opposite absorption cell internal face of 9 installation site of end cap, and there are two the internal reflection body tools implemented
Spherical mirror arranged side by side, i.e. primary event spherical mirror 5, triple reflection spherical mirror 7,5 position of primary event spherical mirror therein
The central point of central point and plus lens 4 is on same straight line, 7 place-centric point of triple reflection spherical mirror therein and outgoing
The exit portion central point of optical fiber 2 is on same straight line；
Correspondingly, peace is fixed at the 9 internal face medium position of end cap opposite with above-mentioned implemented internal reflection body position
Independent secondary reflecting sphere mirror 6 is filled, and on spatial position, the secondary reflecting sphere mirror 6 implemented is in primary event
Between spherical mirror 5 and triple reflection spherical mirror 7；
To sum up setting it is found that by be rationally arranged plus lens 4, primary event spherical mirror 5, secondary reflecting sphere mirror 6 with
And the relative position of triple reflection spherical mirror 7, enter after the incident light that incident optical 1 is loaded into can be made to pass through plus lens 4 to be measured
5 surface of primary event spherical mirror is got in sample headroom, then passes through secondary reflecting sphere mirror 6, triple reflection spherical mirror 7 successively again
It reflects to increase light path, meanwhile, the end face for 1 incident section of incident optical implemented is in primary event spherical mirror 5 and converges thoroughly
On the focal plane of equal value of 4 spectrum of mirror, the end face of 2 exit portion of the output optical fiber is on the focal plane of triple reflection spherical mirror 7, finally
Spectrometer analysis is received by the output optical fiber 2 and is transferred to, absorption spectrum is reduced compared to original background spectrum, then with specific
Algorithm Analysis calculates the concentration for measuring gas.
The absorption pool structure for small-range ultraviolet difference gas analysis described in the utility model embodiment one, solves
Traditional rectangular absorption cell and on the basis of conventional suction pond design with multiple reflections unit absorption cell scheme when it is existing
Problem, for example, when the improved absorption cells of some previous are implemented, using speculum is arranged at incident light source, firstly for
The setting of the speculum is to need to have certain angle, each multiple reflections mirror is then set gradually again, in pond body
The installation site and angle of each minute surface have certain strict demand, and cannot achieve incident and outgoing and be in the same face,
And wait for that test sample gas passes in and out and be in the same face, this brings not small in installation, debugging and progress adaptability measurement work in real time
Trouble.
Embodiment two
As shown in Figs. 1-2, the absorption for small-range ultraviolet difference gas analysis described in the utility model embodiment two
Pool structure, on the basis of embodiment one, the present embodiment two is equivalent to one of embodiment one deformation, the technical issues of solving with
Embodiment one is identical, the technical solution adopted is that realized on the basis of not only triple reflection unit is set, in practical survey
In amount demand, it can be implemented according to different measurement demands, for example, being no less than two spherical surfaces in the setting of internal reflection body surface face
Mirror and each spherical mirror is vertical with incident optical is rationally arranged the position of these spherical mirrors and is equipped in 9 middle part of end cap
No less than one spherical mirror, keep the distance between each two adjacent spherical mirror equal, then so that incident optical is injected again
Multiple reflections are carried out by the spherical mirror of each position successively later, ultimately form the light beam for being parallel to the output optical fiber 2.
In addition, other technological means that the utility model embodiment two is implemented, can refer to embodiment one or on its basis
On be improved, details are not described herein again.
In the description of this specification, if there is term " embodiment one ", " the present embodiment ", " specific implementation " equal descriptions meaning
Refer to particular features, structures, materials, or characteristics described in conjunction with this embodiment or example and is contained in the utility model or invention extremely
In few one embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical reality
Apply example or example；Moreover, described particular features, structures, materials, or characteristics can in any one or more embodiments or
It is combined in a proper manner in example.
In the description of this specification, term " connection ", " installation ", " fixation ", " setting ", " having " etc. do broad sense reason
Solution, for example, " connection " may be a fixed connection or pass through intermediate module on the basis of not influencing parts relationship with technique effect
Indirectly carry out, can also be integrally connected or part connect, such as herewith example situation for those of ordinary skills,
Concrete meaning of the above-mentioned term in the utility model or invention can be understood as the case may be.
The above-mentioned description to embodiment is for the ease of those skilled in the art it will be appreciated that and using this
Case technology, person skilled in the art obviously can make various modifications to these examples easily, and described herein one
As principle be applied in other embodiments without having to go through creative labor.Therefore, this case is not limited to above example, for
The modification of several situations below, all should be in the protection domain of this case：1. based on technical solutions of the utility model and tying
The new technical solution that existing common knowledge is implemented is closed, technique effect is not departing from this caused by the new technical solution
Except utility model technique effect, for example, the skill of position and combination multiple reflections unit that incident optical, the output optical fiber are arranged
Art scheme is applied to other gas analysis detection fields；2. using known technology to the Partial Feature of technical solutions of the utility model
Equivalence replacement, generated technique effect is identical as the utility model technique effect, for example, to end cap seal assembly, optical fiber
Model etc. carries out equivalence replacement and does not generate other technique effects；3. being carried out based on technical solutions of the utility model can
It expands, except the substantive content of the technical solution after expansion is without departing from technical solutions of the utility model；4. new using this practicality
Equivalent transformation made by type specification and accompanying drawing content, is directly or indirectly used in other related technical areas.
Claims (9)
1. a kind of absorption pool structure for small-range ultraviolet difference gas analysis has the pond being made of sealing shell and cover board
Body and the incident light entered inside the pond body by incident optical is made to be received by pond body the output optical fiber and be transferred to spectrometer
Analysis, which is characterized in that the absorption pool structure includes：
End cap between the sealing shell side and cover board, the end cover surface are arranged side by side two and are respectively used to described in connection
The optical fiber connecting hole of incident optical, the output optical fiber；
Triple reflection unit inside the absorption cell, including be set in the incident optical internal end surface plus lens,
It is set to the reflector of the absorption cell internal face opposite with the end cap position and is set to the centre of the end cap internal face
The incident beam of reflecting spherical mirror, the incident optical vertically injects the plus lens and passes through the triple reflection unit
Triple reflection after project and receive from the output optical fiber with the direction for being parallel to the incident beam again.
2. the absorption pool structure according to claim 1 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
Stating reflector has at least two emitting modules.
3. the absorption pool structure according to claim 2 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
It includes that incident beam first reflection by the plus lens can be made to the intermediate reflecting spherical mirror to state emitting module
Primary event spherical mirror and can make second of the reflected beams by the intermediate reflecting spherical mirror finally realize third time it is anti-
It penetrates and by the triple reflection spherical mirror of the parallel injection of outgoing beam.
4. the absorption pool structure according to claim 1 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
The end face for stating incident optical is on the focal plane of equal value of primary event spherical mirror and plus lens spectrum.
5. the absorption pool structure according to claim 4 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
The end face for stating the output optical fiber is on the focal plane of triple reflection spherical mirror.
6. the absorption pool structure of small-range ultraviolet difference gas analysis is used for according to claim 1-5 any one of them, it is special
Sign is：The cover board both sides open up intake interface, the outlet interface for inputting and being discharged for gas respectively, make to wait for that test sample gas exists
Intake interface is full of closed absorption cell after flowing into, and is then exported again from outlet interface, to form a gas return path.
7. the absorption pool structure according to claim 6 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
Stating triple reflection unit makes the light path that measures of small-range gas concentration be measure light path using primary event component four times.
8. the absorption pool structure according to claim 1 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
It states sealing shell to be mutually perpendicular to end cap, to make to wait for that test sample gas passes in and out the direction of absorption cell perpendicular to light beam discrepancy absorption cell
Direction.
9. the absorption pool structure according to claim 1 for small-range ultraviolet difference gas analysis, it is characterised in that：Institute
State end cap, the cover board respectively being disconnected between sealing shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078967.5U CN208013063U (en) | 2018-01-17 | 2018-01-17 | A kind of absorption pool structure for small-range ultraviolet difference gas analysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078967.5U CN208013063U (en) | 2018-01-17 | 2018-01-17 | A kind of absorption pool structure for small-range ultraviolet difference gas analysis |
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| Publication Number | Publication Date |
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| CN208013063U true CN208013063U (en) | 2018-10-26 |
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| CN201820078967.5U Active CN208013063U (en) | 2018-01-17 | 2018-01-17 | A kind of absorption pool structure for small-range ultraviolet difference gas analysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687048A (en) * | 2019-09-25 | 2020-01-14 | 安徽理工大学 | Novel multi-element annular plane mirror optical multi-pass absorption cell |
-
2018
- 2018-01-17 CN CN201820078967.5U patent/CN208013063U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687048A (en) * | 2019-09-25 | 2020-01-14 | 安徽理工大学 | Novel multi-element annular plane mirror optical multi-pass absorption cell |
| CN110687048B (en) * | 2019-09-25 | 2022-01-11 | 安徽理工大学 | Multi-element annular plane mirror optical multi-pass absorption pool |
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