CN216594755U - Optical assembly of hot and wet method flue gas measuring instrument and air chamber thereof - Google Patents
Optical assembly of hot and wet method flue gas measuring instrument and air chamber thereof Download PDFInfo
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- CN216594755U CN216594755U CN202120291421.XU CN202120291421U CN216594755U CN 216594755 U CN216594755 U CN 216594755U CN 202120291421 U CN202120291421 U CN 202120291421U CN 216594755 U CN216594755 U CN 216594755U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model provides an optical component of a hot and wet flue gas measuring instrument and an air chamber thereof. The rear end of the air chamber is provided with a convergent lens, and the front end of the air chamber is provided with a conical lens and a pyramid prism. The conical lens has axial symmetry, so that after a light path is debugged, the reflector group or the transmitting optical fiber and the receiving optical fiber are randomly rotated, the received light energy cannot be influenced, the debugging and the maintenance are more convenient, and the stability is higher; the multi-core optical fiber can be adopted to realize simultaneous measurement of multiple light paths, so that the received light energy is greatly improved, and the utilization rate of the air chamber is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, and particularly relates to an optical assembly of a heat and humidity flue gas measuring instrument and a gas chamber thereof.
Background
At present, the monitoring of the emission of the flue gas requires measuring SO in the flue gas2、NO、NO2And the concentration of the pollutants can be measured by adopting an ultraviolet absorption method. The ultraviolet absorption method is generally used for measuring the pollutant concentration in the flue gas by a hot wet method and a cold dry method. The hot wet method does not need dehumidification, and can avoid SO in the condensation process2、NH3The components which are easy to dissolve in water are dissolved and lost, and the air chamber can be arranged in the sampling tube to be designed into a structure integrating the sampling tube and the host machine, so that the portable smoke analyzer is convenient to carry, and is more suitable for portable smoke analyzers. However, the existing thermal-wet method ultraviolet flue gas analyzer generally has the problem of short maintenance period, and the whole air chamber needs to be disassembled during maintenance so as to wipe and maintain the optical system, so that the maintenance difficulty is high.
Application No.: 201921429518.1, the name is: the patent document of 'a high stability gas measurement gas chamber and its measuring instrument' provides a high stability gas chamber, the light path of this gas chamber is made up of collimating lens, specially designed pyramid prism, the launching optic fibre and receiving optic fibre adopt Y-shaped optic fibre, the light that the launching optic fibre sent can enter the receiving optic fibre after the light path, the light path stability is high. However, in the optical path, when the plane formed by the axes of the transmitting optical fiber and the receiving optical fiber and the special reflecting surface of the pyramid prism are at a specific angle, the receiving optical fiber can well receive the reflected light energy. Therefore, the debugging and the maintenance have certain difficulty, and meanwhile, the light path only can adopt two-core Y-shaped optical fibers.
Application No.: 201921429975.0, the name is: the patent document of 'an air chamber with stable light path system and a measuring instrument thereof' provides a high-stability air chamber, wherein the light path of the air chamber consists of a collimating lens, a double-wedge-shaped lens and a pyramid prism, a transmitting optical fiber and a receiving optical fiber adopt Y-shaped optical fibers, the light emitted by the transmitting optical fiber can enter the receiving optical fiber after passing through the light path, and the light path stability is high. However, in the optical path, when the plane formed by the axes of the transmitting optical fiber and the receiving optical fiber and the wedge-shaped section of the double-wedge-shaped lens are at a specific angle, the receiving optical fiber can well receive the reflected light energy. Therefore, the debugging and the maintenance have certain difficulty, and meanwhile, the light path only can adopt two-core Y-shaped optical fibers.
SUMMERY OF THE UTILITY MODEL
The utility model provides an optical component of a hot wet flue gas measuring instrument and an air chamber thereof, which solve the problems that the debugging and the maintenance of an optical path system of the existing hot wet flue gas analyzer are difficult and the multi-optical-path measurement cannot be carried out.
The optical component of the hot and wet method smoke measuring instrument comprises an incident mirror and a reflector set, wherein the incident mirror is a converging lens, and the reflector set comprises a conical lens and a pyramid prism. The incident mirror of the present invention refers to a mirror on which light emitted from a light source is first incident. The reflector group in the present invention refers to a lens that returns light emitted from an incident mirror to the incident mirror.
Preferably, the converging lens is a double-curvature convex lens.
The utility model also provides a gas chamber of the heat and humidity flue gas measuring instrument, wherein the rear end of the gas chamber is provided with a convergent lens, and the front end of the gas chamber is provided with a conical lens and a pyramid prism.
Preferably, the rear end of the air chamber is connected with an air chamber seat, and the convergent lens is arranged in the air chamber seat.
Preferably, the transmitting optical fiber and the receiving optical fiber are single-core double-ended optical fibers.
Preferably, the transmitting optical fiber and the receiving optical fiber are multi-core double-ended optical fibers, and the structure of the multi-core double-ended optical fiber is that one end of the multi-core double-ended optical fiber is a single core and serves as a receiving end, and the other end of the multi-core double-ended optical fiber is a multi-core ring-shaped distribution and serves as a transmitting end.
Preferably, the transmitting fiber and the receiving fiber are multicore multi-head fibers, the multicore multi-head fibers at least have two pairs of transmitting ends and receiving ends, and the fiber cores at the common end of the multicore multi-head fibers are distributed in an axisymmetric manner.
Preferably, the light emitting and receiving optical fibers are fixed on the air chamber base through an optical fiber sliding base.
Preferably, the front end of the air chamber is connected with a prism seat body, and a conical lens and a pyramid prism are arranged in the prism seat body.
The utility model has the beneficial effects that:
(1) because the conical lens has axial symmetry, after the light path is debugged, the reflector group or the transmitting optical fiber and the receiving optical fiber are randomly rotated, so that the received light energy cannot be influenced, the debugging and the maintenance are more convenient, and the stability is higher;
(2) the multi-core multi-head optical fiber can be adopted, each group of 2 optical fibers with axial symmetry can be used as transmitting and receiving optical fibers, and light with different wave bands can be independently adopted for simultaneous measurement, so that simultaneous measurement of multiple light paths is realized, and the utilization rate of the air chamber is greatly improved;
(3) the multi-core double-ended optical fiber can be adopted, the center is set as the receiving optical fiber, and the plurality of transmitting optical fibers are annularly distributed around the receiving optical fiber, so that the reflected light of the plurality of optical fibers can be concentrated on the receiving optical fiber, the energy of received light is greatly improved, and the optical fiber receiving device is suitable for occasions where the received light is weak.
Drawings
FIG. 1 is a schematic diagram of the optical path principle of the optical assembly of the present invention;
FIG. 2 is a schematic view of the overall structure of the hot wet flue gas measurement chamber of the present invention;
FIG. 3 is a schematic view of the optical fiber sliding seat according to the present invention;
FIG. 4 is a cross-sectional view of the air chamber seat of the present invention;
FIG. 5 is a schematic structural diagram of a prism base according to the present invention;
FIG. 6 is a schematic structural view of a transmitting optical fiber and a receiving optical fiber according to a second embodiment;
FIG. 7 is a schematic structural diagram of a second receiving fiber II according to an embodiment;
FIG. 8 is a schematic structural diagram of a second emission fiber I according to an embodiment;
FIG. 9 is a schematic structural diagram of a transmitting fiber and a receiving fiber according to a third embodiment.
The attached drawings are marked as follows:
1. the device comprises a converging lens, 2, a conical lens, 3, a pyramid prism, 4, an air chamber, 5, an air chamber seat, 6, a prism seat body, 7, an optical fiber sliding seat, 8, a moisture content detection unit, 9, a secondary filter element cylinder, 10, a sealing plug, 11, a filter element pressing cap, 12, a primary filter element, 13, a pressing ring, 14, an O-shaped ring, 50 and a fixing screw hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and should not be construed as limiting the scope of the utility model.
Examples
Referring to fig. 1, the optical assembly of the thermo-wet flue gas measuring instrument of the present embodiment includes an incident mirror and a reflector set, wherein the incident mirror is a converging lens 1, and the reflector set includes a conical lens 2 and a pyramid prism 3. The converging lens 1 is preferably a double-curvature convex lens.
The tapered lens 2 and the corner cube 3 used in the present embodiment are not described in the prior art, but the optical principle thereof can be referred to patent document No. 201910813875.6. Referring to fig. 1, incident light emitted from an end of an emitting optical fiber i passes through a converging lens 1 and then becomes parallel light forming an included angle with a main optical axis of the converging lens 1, that is, light rays of a light group a and a light group b are parallel to each other, and after passing through a conical lens 2, the parallel light is parallel to the main optical axis of the converging lens 1 and enters a pyramid prism 3. The main optical axis of the conical lens 2 is coaxial with that of the pyramid prism 3, but is not coaxial with that of the converging lens 1, the emergent light reflected by the pyramid prism 3 deflects 180 degrees with the incident light, and then enters the conical lens 2, the light reflected by the conical lens 2 deflects towards the main optical axis of the conical lens 2, but the incident light and the reflected light of the conical lens 2 are not necessarily in an axisymmetric state, the light reflected by the conical lens 2 is converged to the end part of the receiving optical fiber II through the converging lens 1, namely, the light group c is the light reflected by the light group a, the light group d is the light reflected by the light group b, and the light of the light group c and the light of the light group d are finally converged to the receiving optical fiber II.
The vertex angle of the conical lens 2 still satisfies the formula
Wherein, the center distance between the transmitting optical fiber I and the receiving optical fiber II is LFiberThe focal length of the converging lens 1 is f', and n is the refractive index of the conical lens 2.
As a preferable implementation mode of the embodiment, the transmitting optical fiber I and the receiving optical fiber II adopt a single-core multi-head optical fiber, namely a Y-shaped optical fiber, which is also an optical fiber commonly used in an optical path system in the prior art.
As shown in fig. 2, the present embodiment further provides an air chamber of a thermal wet flue gas measuring instrument, the rear end of the air chamber 4 is connected to an air chamber base 5, and the collecting lens 1 is disposed in the air chamber base 5. The front end of the air chamber 4 is connected with a prism seat body 6, and a conical lens 2 and a pyramid prism 3 are arranged in the prism seat body 6.
In a preferred embodiment of this embodiment, the air chamber seat 5 is connected to an optical fiber sliding seat 7, and the optical fiber sliding seat 7 is connected to the transmitting optical fiber i and the receiving optical fiber ii. The structure of the optical fiber sliding seat 7 is as shown in fig. 3, referring to fig. 4, 4 fixing screw holes 50 are formed in the air chamber seat 5, and the optical fiber sliding seat 7 is adjusted and fixed in six dimensions, namely, up, down, left, right, front, back, and rear, by inserting screws into the fixing screw holes 50 to abut against the optical fiber sliding seat 7. The air chamber seat 5 is also connected with a moisture content detection unit 8. As can be seen from fig. 2, the moisture content measuring unit 8 and the fiber slide mount 7 are connected to different chambers of the air cell mount 5, which ensures the accuracy of the moisture content measurement.
Referring to fig. 5, the prism holder body 6 and the air chamber 4 of the present embodiment are detachably connected, an external thread is provided on the outside of the prism holder body 6, and an internal thread is provided inside the air chamber 4, so that the prism holder body 6 is screwed to the air chamber 4. One side of the prism seat body 6 is connected with a secondary filter element cylinder 9, the end part of the secondary filter element cylinder is sealed by a sealing plug 10, and the end part of the secondary filter element cylinder 9 is connected with a primary filter element 12 by a filter element pressing cap 11. The secondary filter element cartridge 8 is also removable. In order to fix the reflector group in the prism base body 6, a pressing ring 13 is arranged on one side of the conical lens 2, which is in contact with the prism base body 6, and an O-shaped ring 14 is arranged between the conical lens 2 and the pressing ring 13, so that abrasion of the lens is prevented.
Example two
Referring to fig. 6 to 8, the present embodiment is different from the first embodiment in that: the transmitting optical fiber I and the receiving optical fiber II adopt multi-core double-ended optical fibers, one end of each multi-core double-ended optical fiber is a single core serving as a receiving end, namely the receiving optical fiber II, and the other end of each multi-core double-ended optical fiber is a multi-core annular distribution serving as a transmitting end, namely the transmitting optical fiber I. The reflected light of a plurality of transmitting optical fibers I can be concentrated on the receiving optical fiber II, so that the energy of received light is greatly improved, and the optical fiber receiving device is suitable for occasions where the received light is weak.
EXAMPLE III
Referring to fig. 9, the difference between the present embodiment and the first and second embodiments is: the transmitting optical fiber I and the receiving optical fiber II adopt multi-core multi-head optical fibers, 4 heads are adopted in the embodiment, two pairs of transmitting ends and two pairs of receiving ends are arranged, fiber cores at the common ends of the multi-core multi-head optical fibers are distributed in an axisymmetric mode, and independent optical path measurement of 2 wave bands can be carried out.
Claims (8)
1. The utility model provides a hot wet method flue gas measuring apparatu optical component, includes incident mirror, speculum group, incident optical fiber, reflection optical fiber, the incident mirror is the convergent lens, its characterized in that: the reflector group comprises a conical lens and a pyramid prism, the conical lens is coaxial with the main optical axis of the pyramid prism, the conical lens is not coaxial with the main optical axis of the converging lens, and the apex angle of the conical lens meets the formula
Wherein the center distance between the transmitting optical fiber and the receiving optical fiber is LFiberThe focal length of the converging lens is f', and n is the refractive index of the conical lens.
2. The thermo-hygrometric flue gas measuring instrument optical assembly of claim 1, wherein: the converging lens is a double-curvature convex lens.
3. The utility model provides a hot wet flue gas measuring apparatu air chamber, the rear end of air chamber sets up convergent lens, its characterized in that: the rear end of the air chamber is connected with an air chamber seat, the convergent lens is arranged in the air chamber seat, the front end of the air chamber is connected with a prism seat body, and a conical lens and a pyramid prism are arranged in the prism seat body.
4. The thermo-hygrometric flue gas gauge plenum of claim 3, characterized in that: the air chamber seat is connected with the transmitting optical fiber and the receiving optical fiber.
5. The thermo-hygrometric flue gas gauge plenum of claim 4, characterized in that: the transmitting optical fiber and the receiving optical fiber adopt single-core double-ended optical fibers.
6. The thermo-hygrometric flue gas gauge plenum of claim 4, characterized in that: the transmitting optical fiber and the receiving optical fiber adopt multi-core double-ended optical fibers, and the structure of the multi-core double-ended optical fibers is that one end is a single core and serves as a receiving end, and the other end is a multi-core and annularly distributed and serves as a transmitting end.
7. The thermo-hygrometric flue gas gauge plenum of claim 4, characterized in that: the transmitting optical fiber and the receiving optical fiber adopt multi-core multi-head optical fibers, the multi-core multi-head optical fibers at least comprise two pairs of transmitting ends and receiving ends, and fiber cores at the common end of the multi-core multi-head optical fibers are distributed in an axisymmetric mode.
8. The thermo-hygrometric flue gas measuring instrument gas cell as claimed in any of claims 4 to 7, characterized in that: the transmitting light and the receiving optical fiber are fixed on the air chamber seat through the optical fiber sliding seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120291421.XU CN216594755U (en) | 2021-02-02 | 2021-02-02 | Optical assembly of hot and wet method flue gas measuring instrument and air chamber thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120291421.XU CN216594755U (en) | 2021-02-02 | 2021-02-02 | Optical assembly of hot and wet method flue gas measuring instrument and air chamber thereof |
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| CN216594755U true CN216594755U (en) | 2022-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877032A (en) * | 2022-12-08 | 2023-03-31 | 青岛众瑞智能仪器股份有限公司 | Method for detecting flue gas flow velocity by light interference scintillation method and novel flue gas flow velocity measuring instrument |
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2021
- 2021-02-02 CN CN202120291421.XU patent/CN216594755U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877032A (en) * | 2022-12-08 | 2023-03-31 | 青岛众瑞智能仪器股份有限公司 | Method for detecting flue gas flow velocity by light interference scintillation method and novel flue gas flow velocity measuring instrument |
| CN115877032B (en) * | 2022-12-08 | 2023-08-08 | 青岛众瑞智能仪器股份有限公司 | Method for detecting smoke flow velocity by optical interference scintillation method and smoke flow velocity measuring instrument |
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