CN110987812A - Gas chamber structure of ultralow-concentration gas analyzer - Google Patents
Gas chamber structure of ultralow-concentration gas analyzer Download PDFInfo
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- CN110987812A CN110987812A CN201911313690.5A CN201911313690A CN110987812A CN 110987812 A CN110987812 A CN 110987812A CN 201911313690 A CN201911313690 A CN 201911313690A CN 110987812 A CN110987812 A CN 110987812A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
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Abstract
The invention discloses an air chamber structure of an ultra-low concentration gas analyzer, which comprises an air chamber shell and a top cover, wherein the top cover is connected with an opening at the top of the air chamber shell in a threaded sealing manner, the air chamber shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with a one-way valve, the air chamber shell is internally provided with a filter screen which is coaxial with the air chamber shell, so that a gas inspection area is formed in the central area of the filter screen, the filter screen is arranged in the air chamber shell in an extruding manner, the gas inspection area is internally provided with a laser emitting assembly and a laser receiving assembly, and the laser emitting assembly and the laser receiving assembly are positioned in the axial direction of the gas: the gas that enters into in the gaseous inspection district can be filtered in advance, and its velocity of flow can slow down moreover, helps guaranteeing gaseous stability, is convenient for detect, and the mounting means of filter screen adopts the extruded mode of pretension spring simultaneously, and it is comparatively convenient to install and dismantle.
Description
Technical Field
The invention relates to the technical field of gas analysis, in particular to a gas chamber structure of an ultralow-concentration gas analyzer.
Background
Along with the development of industry, more and more industrial waste gas needs to be handled, and people also pay more and more attention to environmental protection simultaneously, and in the testing process of industrial waste gas, in order to guarantee the accuracy of analysis testing data, it is very important to filter the dust in the industrial waste gas. TDLAS chinese translation is: tunable semiconductor laser absorption spectroscopy. In measuring the concentration of a gas by the TDLAS measurement method, an incident laser beam whose wavelength is modulated by a current at a certain frequency f is introduced into a measurement gas chamber containing one or more target gases to be analyzed, and the optical power of a transmitted laser beam which has passed through the gas and returned is detected by an opto-electronic sensor of a gas sensor measurement apparatus, and the gas to be measured may contain a plurality of gas components each having an absorption characteristic of a specific wavelength. Therefore, when the incident laser beam having the specific frequency f is introduced into the gas to be measured, the incident laser beam is strongly absorbed in the vicinity of the specific frequency f of the target gas component of the gas to be measured, and the intensity of the absorption of the incident laser beam by the target gas component is obtained.
At present ultralow concentration gas analysis technical field, contain the impurity of many big granules in the gas sample, it has certain reflex action to incident laser, has the influence to the gas analysis result, consequently, this application provides an ultralow concentration gas analysis appearance gas chamber structure.
Disclosure of Invention
The invention aims to provide a gas chamber structure of an ultra-low concentration gas analyzer, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an ultralow concentration gas analysis appearance air chamber structure, includes air chamber shell and screw thread sealing connection and is in air chamber shell open-top's top cap, be equipped with air inlet and gas outlet on the air chamber shell, just all install the check valve on air inlet and the gas outlet, still be equipped with rather than coaxial filter screen in the air chamber shell, make the central zone of filter screen forms gaseous inspection area, the filter screen extrusion is installed in the air chamber shell, still be equipped with laser emission subassembly and laser receiving assembly in the gaseous inspection area, laser emission subassembly and laser receiving assembly are in on the axis direction in gaseous inspection area.
As a further scheme of the invention: the bottom of air chamber shell is equipped with the receiving assembly installing port, laser receiving assembly screw thread sealing connection be in on the receiving assembly installing port.
As a still further scheme of the invention: and sealing rings are arranged between the top cover and the air chamber shell, between the laser receiving assembly and the receiving assembly mounting port.
As a still further scheme of the invention: and an anti-adsorption film is plated on the bottom plane of the air chamber shell.
As a still further scheme of the invention: the air chamber shell is internally provided with a gland, the gland is provided with a tongue-and-groove matched with an opening at the top of the filter screen, a pre-tightening spring is arranged between the gland and the top cover, two ends of the pre-tightening spring respectively abut against the gland and the top cover, the gland and the top cover are respectively provided with a spring positioning ring for positioning the pre-tightening spring, and the laser emission assembly is arranged on the gland through a mounting seat.
As a still further scheme of the invention: the bottom of air chamber shell is equipped with and is used for right the filter screen spacing collar that the filter screen advances line location.
As a still further scheme of the invention: the air chamber shell is detachably connected with the mounting angle code.
As a still further scheme of the invention: the bottom of the air chamber shell is provided with a plurality of parallel mounting rails, and one of the mounting corner connectors is provided with a channel which is matched with the mounting rails in the direction.
Compared with the prior art, the invention has the beneficial effects that: the gas that enters into in the gaseous test zone can be filtered in advance, and its velocity of flow can slow down moreover, helps guaranteeing gaseous stability, is convenient for detect, and the mounting means of filter screen adopts pretension spring extruded mode simultaneously, and it is comparatively convenient to install and dismantle, and its overall structure is also comparatively simple, convenient operation.
Drawings
Fig. 1 is a schematic view of the internal structure of a gas cell structure of an ultra-low concentration gas analyzer.
Fig. 2 is a schematic structural diagram of a gas cell structure of an ultra-low concentration gas analyzer.
FIG. 3 is a schematic structural diagram of an installation corner brace in an ultra-low concentration gas analyzer gas chamber structure.
In the figure: 1-air chamber shell, 2-top cover, 3-pre-tightening spring, 4-spring positioning ring, 5-gland, 6-mounting seat, 7-laser emission component, 8-filter screen, 9-gas inspection zone, 10-air inlet, 11-air outlet, 12-mounting corner connector, 13-receiving component mounting opening, 14-laser receiving component, 15-mounting rail, 16-filter screen limiting ring and 17-sealing ring.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Example 1
Referring to fig. 1 to 3, in the embodiment of the invention, an air chamber structure of an ultra-low concentration gas analyzer includes an air chamber housing 1 and a top cover 2 connected to an opening at the top of the air chamber housing 1 in a sealing manner through a thread, the air chamber housing 1 is provided with an air inlet 10 and an air outlet 11, the air inlet 10 and the air outlet 11 are both provided with a one-way valve, the air chamber housing 1 is further provided with a filter screen 8 coaxial with the air chamber housing, a gas inspection area 9 is formed in a central area of the filter screen 8, the filter screen 8 is mounted in the air chamber housing 1 in an extruding manner, the gas inspection area 9 is further provided with a laser emitting assembly 7 and a laser receiving assembly 14, and the laser emitting assembly 7 and the laser receiving assembly 14 are located in an axial direction of the.
In practical application of the embodiment of the invention, the gas entering the gas inspection area 9 can be filtered in advance, the flow rate can be reduced, the stability of the gas is ensured, the detection is convenient, and meanwhile, the installation mode of the filter screen 8 adopts an extrusion mode, so that the installation and the disassembly are more convenient.
Specifically, the bottom of the air chamber shell 1 is provided with a receiving component mounting opening 13, and the laser receiving component 14 is connected to the receiving component mounting opening 13 in a threaded sealing manner. More specifically, sealing rings 17 are arranged between the top cover 2 and the air chamber shell 1, between the laser receiving assembly 14 and the receiving assembly mounting opening 13.
In order to prevent the loss of the laser beam, the bottom plane of the gas chamber shell 1 is plated with an anti-adsorption film.
Example 2
Referring to fig. 1 to 3, in the air chamber structure of the ultra-low concentration gas analyzer in the embodiment of the present invention, for the installation manner of the filter screen 8, a gland 5 is disposed in the air chamber housing 1, a tongue-and-groove matched with the top opening of the filter screen 8 is disposed on the gland 5, a pre-tightening spring 3 is disposed between the gland 5 and the top cover 2, two ends of the pre-tightening spring 3 respectively abut against the gland 5 and the top cover 2, spring positioning rings 4 for positioning the pre-tightening spring 3 are disposed on the gland 5 and the top cover 2, and the laser emission assembly 7 is installed on the gland 5 through an installation seat 6.
Further, the bottom of air chamber shell 1 is equipped with and is used for right the filter screen spacing collar 16 that filter screen 8 advances line location, through mutually supporting of filter screen spacing collar 16 and gland 5, can be convenient right filter screen 8 advances line location installation and dismantlement, when needs are dismantled, only need unscrew top cap 2, then take out gland 5, filter screen 8 etc. in proper order can, it is very convenient.
Example 3
Referring to fig. 1 to 3, in the embodiment of the present invention, an air chamber structure of an ultra-low concentration gas analyzer further includes an installation corner brace 12 for installing the air chamber housing 1, and the air chamber housing 1 is detachably connected to the installation corner brace 12.
Specifically, the bottom of air chamber shell 1 is equipped with a plurality of parallel installation rails 15, be equipped with on one of them face of installation angle sign indicating number 12 with installation rail 15 is to the complex channel, and air chamber shell 1 can realize sliding fit with installation angle sign indicating number 12 promptly, and when practical application, can exert damping on the fitting surface between them, guarantees the damping effect, prevents the problem that drops easily between the two.
The embodiment of the invention provides an air chamber structure of an ultra-low concentration gas analyzer, gas entering a gas inspection area 9 can be filtered in advance, the flow rate can be reduced, the stability of the gas is ensured, the detection is convenient, meanwhile, the installation mode of a filter screen 8 adopts a mode of extruding a pre-tightening spring 3, the installation and the disassembly are convenient, the integral structure is simple, and the operation is convenient.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A gas chamber structure of an ultra-low concentration gas analyzer comprises a gas chamber shell (1) and a top cover (2) which is connected with an opening at the top of the gas chamber shell (1) in a thread sealing way, it is characterized in that the air chamber shell (1) is provided with an air inlet (10) and an air outlet (11), and the air inlet (10) and the air outlet (11) are both provided with one-way valves, a filter screen (8) coaxial with the air chamber shell (1) is also arranged in the air chamber shell, so that the central area of the sieve (8) forms a gas inspection zone (9), the filter screen (8) is arranged in the air chamber shell (1) in an extruding way, a laser emitting component (7) and a laser receiving component (14) are also arranged in the gas inspection area (9), the laser emitting assembly (7) and the laser receiving assembly (14) are arranged in the axial direction of the gas inspection area (9).
2. The ultra-low concentration gas analyzer gas cell structure according to claim 1, wherein the bottom of the gas cell housing (1) is provided with a receiving assembly mounting opening (13), and the laser receiving assembly (14) is screwed and sealed on the receiving assembly mounting opening (13).
3. The gas chamber structure of the ultra-low concentration gas analyzer according to claim 2, wherein sealing rings (17) are arranged between the top cover (2) and the gas chamber shell (1), between the laser receiving assembly (14) and the receiving assembly mounting port (13).
4. A gas cell structure of ultra-low concentration gas analyzer in accordance with claim 1, 2 or 3, wherein the bottom plane of the gas cell housing (1) is plated with an anti-adsorption film.
5. The air chamber structure of the ultra-low concentration gas analyzer according to claim 4, wherein a gland (5) is arranged in the air chamber housing (1), a tongue-and-groove matched with the top opening of the filter screen (8) is arranged on the gland (5), a pre-tightening spring (3) is arranged between the gland (5) and the top cover (2), two ends of the pre-tightening spring (3) are respectively abutted against the gland (5) and the top cover (2), spring positioning rings (4) for positioning the pre-tightening spring (3) are arranged on the gland (5) and the top cover (2), and the laser emitting assembly (7) is mounted on the gland (5) through a mounting seat (6).
6. An ultra-low concentration gas analyzer gas chamber structure according to claim 5, characterized in that the bottom of the gas chamber housing (1) is provided with a screen spacing ring (16) for positioning the screen (8).
7. An ultra low concentration gas analyzer gas cell structure according to claim 1 or 2 or 3 or 5 or 6, further comprising a mounting corner bracket (12) for mounting the gas cell housing (1), wherein the gas cell housing (1) is detachably connected with the mounting corner bracket (12).
8. An ultra-low concentration gas analyzer gas cell structure according to claim 7, characterized in that the bottom of the gas cell housing (1) is provided with a plurality of parallel mounting rails (15), and one of the faces of the mounting corner bracket (12) is provided with a groove which is matched with the mounting rails (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313690.5A CN110987812A (en) | 2019-12-19 | 2019-12-19 | Gas chamber structure of ultralow-concentration gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313690.5A CN110987812A (en) | 2019-12-19 | 2019-12-19 | Gas chamber structure of ultralow-concentration gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110987812A true CN110987812A (en) | 2020-04-10 |
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ID=70095757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911313690.5A Pending CN110987812A (en) | 2019-12-19 | 2019-12-19 | Gas chamber structure of ultralow-concentration gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110987812A (en) |
-
2019
- 2019-12-19 CN CN201911313690.5A patent/CN110987812A/en active Pending
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Application publication date: 20200410 |
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| WD01 | Invention patent application deemed withdrawn after publication |