CN105675463B - Gas sample inlet for atmosphere detection equipment - Google Patents

Gas sample inlet for atmosphere detection equipment Download PDF

Info

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
Authority
CN
China
Prior art keywords
opening
gas
light
atmosphere
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610053208.9A
Other languages
Chinese (zh)
Other versions
CN105675463A (en
Inventor
张大伟
刘保献
王莉华
陈添
安欣欣
姜南
马腾飞
周一鸣
孙磊
曹阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER
Original Assignee
BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER filed Critical BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENTER
Priority to CN201610053208.9A priority Critical patent/CN105675463B/en
Publication of CN105675463A publication Critical patent/CN105675463A/en
Application granted granted Critical
Publication of CN105675463B publication Critical patent/CN105675463B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • G01N2015/0693Investigating concentration of particle suspensions by optical means, e.g. by integrated nephelometry

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

Gas sample inlet for atmosphere detection equipment
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.
CN201610053208.9A 2016-01-27 2016-01-27 Gas sample inlet for atmosphere detection equipment Active CN105675463B (en)

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

Family

ID=56303182

Family Applications (1)

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

Country Status (1)

Country Link
CN (1) CN105675463B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107305178A (en) * 2016-04-20 2017-10-31 华邦电子股份有限公司 Particle sensing device further and the electronic equipment with particle sensing device further

Citations (1)

* Cited by examiner, † Cited by third party
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN105675463A (en) 2016-06-15

Similar Documents

Publication Publication Date Title
KR101408513B1 (en) Beta-ray soot concentration direct readout monitor and method for determining effective sample
CN106769744A (en) A kind of vehicle-mounted laser dust sensor
CN205958420U (en) Light scattering particulate matter concentration detection device
CN1418358A (en) Improvements relating to smoke detectors particularly ducted smoke detectors
CN206399778U (en) Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit
CN105675463B (en) Gas sample inlet for atmosphere detection equipment
CN104964891B (en) The detection method and sampling apparatus and sample devices of particle concentration free of cleaning
CN201788149U (en) Light scattering type particulate matter on-line monitor with humidity correcting function
CN106290089A (en) A kind of high-precision miniaturization particulate matter sensors
CN206440577U (en) Dust investigating
CN205352903U (en) A gaseous introduction port for atmosphere check out test set
CN205941332U (en) Water chlorophyll concentration normal position detection device
CN205080028U (en) Particle detection device
CN105259166B (en) Formaldehyde examination device and detection method
CN207300816U (en) A kind of particulate matter sensors based on pulsed laser deposition
CN205786211U (en) Particle analyte detection device in a kind of air
CN2887350Y (en) Air suction type fire disaster detector
CN206114476U (en) Measure sensor of fine particles concentration
CN206656939U (en) A kind of dust sensor rain cover
CN206656940U (en) A kind of vehicle-mounted laser dust sensor
CN205538575U (en) Light scattering formula aerosol concentration measurement appearance
CN205103166U (en) Formaldehyde testing device
CN204718931U (en) A kind of high-precision microminiaturized particulate matter sensors
CN204758441U (en) Gaseous buffer of laser particle dust counter
CN106680171A (en) Rainproof cover of dust sensor

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant