CN105675463B - Gas sample inlet for atmosphere detection equipment - Google Patents
Gas sample inlet for atmosphere detection equipment Download PDFInfo
- Publication number
- CN105675463B CN105675463B CN201610053208.9A CN201610053208A CN105675463B CN 105675463 B CN105675463 B CN 105675463B CN 201610053208 A CN201610053208 A CN 201610053208A CN 105675463 B CN105675463 B CN 105675463B
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- Prior art keywords
- gas inlet
- atmosphere
- gas
- light
- hollow shell
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000011358 absorbing material Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 241000238631 Hexapoda Species 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000000149 argon plasma sintering Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 241000255925 Diptera Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005250 beta ray Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G01N15/075—
Abstract
The invention provides a gas injection port for atmosphere detection equipment, which comprises a hollow shell, a shielding body and a tube body, wherein the hollow shell is respectively provided with a top opening and a bottom opening, the shielding body is embedded in the hollow shell and stretches across a light path between the top opening and the bottom opening, one end of the tube body is connected with the top opening of the hollow shell, and the other end of the tube body is connected with an optical detector of the atmosphere detection equipment. The invention can prevent light, rain and insects and improve the accuracy of gas detection.
Description
Technical Field
The invention belongs to the field of atmospheric measurement, and particularly relates to a gas injection port for atmospheric detection equipment.
Background
At present, methods for measuring mass concentration of atmospheric particulates at home and abroad mainly comprise an off-line filter membrane weighing method, an on-line beta-ray method, a micro-oscillation balance method and the like. The filter membrane weighing method is the internationally recognized quality and concentration detection reference method for the atmospheric particulates at present, and has the defects of time and labor waste and poor timeliness. The beta-ray method and the micro-oscillation balance method can realize real-time and automatic monitoring, and have the defects of high production cost, large equipment volume and inapplicability to outdoor flow measurement and dense point distribution. The light scattering particle sensor based on the Mie light scattering theory is recently favored by people due to the advantages of low cost, low power consumption, miniaturization, small maintenance amount and the like.
The particle detector based on the Mie light scattering theory is an optical chamber, a sensor of the particle detector is an optical sensor, and in order to enable detection to be more accurate, the interference of stray light on the optical chamber needs to be eliminated, and an air path needs to be shortened as much as possible.
A gaseous introduction port among the prior art is connected with the detector through a small segment straight tube, and the sample connection is equipped with fly net and rain-proof cap, however, rain-proof cap has certain shading effect, but the shading is incomplete, and because sample connection and pipeline do not adopt special extinction material, has partial scattering and reflection parasitic light to get into the light room and disturb the detection.
Another kind of gas introduction port among the prior art, gas gets into gas detection equipment through the introduction port after, reaches the detector through a section longer lightproof gas circuit to get rid of miscellaneous light such as natural light and disturb optical sensor and detect, however, this kind of gas introduction port gas circuit is longer, and probably has bending, turning, leads to particulate matter in the sampling gas to lose easily, thereby influences and detects the accuracy.
disclosure of Invention
Technical problem to be solved
The invention aims to provide a gas injection port, which is used for detecting pollutants such as atmospheric particulates and the like, can prevent light, rain and insects, and simultaneously improves the gas detection accuracy.
(II) technical scheme
The invention provides a gas injection port for atmosphere detection equipment, wherein the atmosphere detection equipment is provided with a detector, and the gas injection port comprises:
The hollow shell is respectively provided with a top opening and a bottom opening, and the bottom opening and the top opening form a light path;
The shielding body is embedded in the hollow shell and spans across the light path;
And one end of the pipe body is connected with the top opening of the hollow shell, and the other end of the pipe body is connected with the detector.
(III) advantageous effects
The invention has the following advantages:
1. The shielding body crosses a light path from the bottom opening to the top opening to block direct light, and the hollow shell is made of light absorption materials and absorbs reflected light, so that external light cannot enter the top opening and cannot reach the optical detector through the tube body to improve the gas detection accuracy;
2. the tube body is directly connected with the detector, so that a sampling gas path is shortened, and detection errors are further reduced;
3. The bottom opening is downward, so that rainwater cannot enter the sample inlet under the action of gravity, and the rain-proof function is realized;
4. The bottom opening is provided with a filter screen which has the insect prevention function.
Drawings
Fig. 1 is a gas injection port for an atmosphere detection device according to an embodiment of the present invention.
Detailed Description
The invention provides a gas injection port for atmosphere detection equipment, which comprises a hollow shell, a shielding body and a tube body, wherein the hollow shell is respectively provided with a top opening and a bottom opening, the shielding body is embedded in the hollow shell and stretches across a light path between the top opening and the bottom opening, one end of the tube body is connected with the top opening of the hollow shell, and the other end of the tube body is connected with an optical detector of the atmosphere detection equipment. The invention can prevent light, rain and insects and improve the accuracy of gas detection.
According to one embodiment of the present invention, a gas inlet for an atmosphere detection device, wherein the atmosphere detection device has a detector, the gas inlet comprises: the hollow shell is respectively provided with a top opening and a bottom opening, and the bottom opening and the top opening form a light path; the shielding body is embedded in the hollow shell and spans across the light path; and one end of the pipe body is connected with the top opening of the hollow shell, and the other end of the pipe body is connected with the detector. According to the above embodiment, gas and light enter from the bottom opening of the hollow housing, wherein, since the light travels in a straight line, the light is blocked by the shielding body after entering the hollow housing and cannot reach the top opening of the hollow housing, but when the gas meets the shielding body, the gas bypasses the shielding body and reaches the top opening of the hollow housing, so that only the gas reaching the detector is provided without external light; after the gas reaches the top opening, the gas can reach the detector through the tube body, and the detector can be an optical detector, and the optical detector utilizes the light scattering principle to detect the particulate matter in the gas, thereby measuring the particulate matter concentration in the atmosphere.
According to one embodiment of the present invention, a filter screen is disposed at the bottom opening of the hollow casing, so that when air enters from the bottom opening, larger suspended substances such as mosquitoes and catkins can be filtered.
According to one embodiment of the invention, after entering the hollow shell from the entrance bottom opening, light can be blocked not only by the blocking object, but also reflected on the hollow shell, which can cause the light to enter the detector.
according to an embodiment of the present invention, the hollow housing and the tube are integrally formed to prevent air leakage and light leakage from interfering with detection.
according to an embodiment of the present invention, the hollow shell may be formed in various shapes such as a hollow sphere, a hollow cube, etc., and preferably, the hollow shell may be a hollow sphere in consideration of gas circulation performance. Correspondingly, the shielding body can be made into various shapes, such as a sphere, a cube, and the like, and the spherical shape is preferably adopted in consideration of the gas circulation performance.
According to one embodiment of the invention, the tube body is a straight tube, so that the gas path is prevented from being long, and no bending or corner exists, so that the loss of particles in the sampling gas is avoided.
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 specific embodiments and the accompanying drawings.
Fig. 1 is a gas injection port for an atmosphere detection device according to an embodiment of the present invention, as shown in fig. 1, the gas injection port is a sleeve ball structure, and is composed of an external hollow sphere with an upper opening and a lower opening and an internal complete sphere, and a downward opening diameter of the external sphere is smaller than a diameter of the internal sphere. The gas injection port is formed by light absorption materials at one time, no gap exists on the outer surface, and the appearance is basically spherical. The lower opening of the external sphere is an air inlet, and is provided with a filter screen, so that the insect prevention function is realized; the upper opening is connected with the gas path and directly reaches the optical sensor. The sleeve-shaped spherical structure allows gas to enter the sensor from the annular spherical gap and prevents light from directly irradiating the optical sensor, and the light-absorbing material can effectively prevent reflected light from entering the optical sensor. The air enters the sampling opening from the lower part of the sampling opening through the filter screen, and larger suspended matters such as mosquitoes, catkins and the like are intercepted outside the filter screen. After entering the sampling port, the airflow enters the straight pipe connecting the sphere and the optical detector through the annular spherical gap and then enters the optical detector. Light rays enter the sampling port from the lower part of the sampling port in an irradiating mode, direct light rays are intercepted after irradiating the inner ball body, scattered light rays are absorbed after reaching any part inside the sampling port, reflected light cannot be generated and enter the optical detector, and therefore the light-proof function is achieved. Because the opening of the sampling port is downward, rainwater cannot enter the sampling port under the action of gravity, so that the sampling port has a rainproof function.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A gas inlet for an atmosphere detection apparatus, wherein the atmosphere detection apparatus has a detector, characterized in that the gas inlet comprises:
The hollow shell is respectively provided with a top opening and a bottom opening, and the bottom opening forms a light path to the top opening;
the shielding body is embedded in the hollow shell and stretches across the light path, and the size of the shielding body is larger than that of the bottom opening;
And one end of the pipe body is connected with the top opening of the hollow shell, and the other end of the pipe body is connected with the detector.
2. the gas inlet for the atmosphere detecting equipment according to claim 1, wherein a filter screen is disposed at the bottom opening of the hollow housing.
3. The gas inlet for the atmosphere detecting device according to claim 1, wherein the hollow housing is made of a light absorbing material.
4. The gas inlet for the atmosphere detecting device according to claim 1, wherein the hollow housing is integrally formed with the tube body.
5. The gas inlet for the atmosphere detecting device according to claim 1, wherein the hollow housing is a hollow sphere.
6. The gas inlet for the atmosphere detecting device according to claim 1, wherein the shielding body is a sphere.
7. The gas inlet for the atmosphere detecting equipment according to claim 1, wherein the pipe body is a straight pipe.
8. The gas inlet for the atmosphere detection apparatus according to claim 1, wherein the detector is an optical detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053208.9A CN105675463B (en) | 2016-01-27 | 2016-01-27 | Gas sample inlet for atmosphere detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053208.9A CN105675463B (en) | 2016-01-27 | 2016-01-27 | Gas sample inlet for atmosphere detection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105675463A CN105675463A (en) | 2016-06-15 |
| CN105675463B true CN105675463B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610053208.9A Active CN105675463B (en) | 2016-01-27 | 2016-01-27 | Gas sample inlet for atmosphere detection equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107305178B (en) * | 2016-04-20 | 2022-04-05 | 华邦电子股份有限公司 | Particle sensing device and electronic apparatus having the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205352903U (en) * | 2016-01-27 | 2016-06-29 | 北京市环境保护监测中心 | A gaseous introduction port for atmosphere check out test set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5545144B2 (en) * | 2010-09-14 | 2014-07-09 | セイコーエプソン株式会社 | Optical device unit and detection apparatus |
| JP5640592B2 (en) * | 2010-09-14 | 2014-12-17 | セイコーエプソン株式会社 | Optical device unit and detection apparatus |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205352903U (en) * | 2016-01-27 | 2016-06-29 | 北京市环境保护监测中心 | A gaseous introduction port for atmosphere check out test set |
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| CN105675463A (en) | 2016-06-15 |
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