CN107843467A - Suitable for the jetting type gas sensing system and method for safety inspection - Google Patents
Suitable for the jetting type gas sensing system and method for safety inspection Download PDFInfo
- Publication number
- CN107843467A CN107843467A CN201711138746.9A CN201711138746A CN107843467A CN 107843467 A CN107843467 A CN 107843467A CN 201711138746 A CN201711138746 A CN 201711138746A CN 107843467 A CN107843467 A CN 107843467A
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- Prior art keywords
- gas
- post
- air
- safety inspection
- nozzle
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Links
- 238000007689 inspection Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000005532 trapping Effects 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 230000006698 induction Effects 0.000 claims 6
- 239000004744 fabric Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000010304 firing Methods 0.000 abstract description 2
- 231100001261 hazardous Toxicity 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 66
- 238000002156 mixing Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000037230 mobility Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000012364 Peperomia pellucida Nutrition 0.000 description 1
- 240000007711 Peperomia pellucida Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
- G01N2001/242—Injectors or ejectors
Abstract
The invention discloses a kind of jetting type gas sensing system and method suitable for safety inspection, belong to field of gas detection.The system mainly includes the gentle physical examination of air-supply post and surveys post two parts composition, it is characterised in that：Gas is in the presence of pressure fan, sprayed by the jet nozzle being arranged on ajutage, the gas for driving the gentle physical examination of air-supply post to survey among post, gas trapping mouth is flowed in the lump, when gas is reached near trapping mouth, enter detector by induced draft blower withdraws, then from the bottom discharge of gas detection post, when containing gas to be detected in the gas that the gentle physical examination of post of blowing is surveyed between post, detector can send sound and light alarm.Special jet nozzle is installed on system air-supply post, ensures that gas supply air system far firing range, gas blend strong, reliability height, suitable for the detection of bus station, subway station, high ferro station, airport and the intensive occasion hazardous gas of other staff.
Description
Technical field
The present invention devises a kind of jetting type gas sensing system suitable for safety inspection, belongs to field of gas detection.
Background technology
The occasion population mobilities such as station, subway station, high ferro station, airport, movie theatre are big, densely populated place, the peace of these occasions
Full detection requirement is higher.In order to prevent criminal from carrying inflammable and explosive gas（Liquid）Body or toxic and harmful gas enter these
Close, it is necessary to safety monitoring is carried out to the personnel for entering these occasions, prevents toxic and harmful gas or liquid triggers security incident,
People's lives and properties are brought about great losses.
Be advantageous to carry out the personnel for carrying toxic and harmful gas or liquid in densely populated place occasion installation gas detecting instrument
Investigation, but majority of gas detector can only pinpoint detection in the market, and measurement range is limited, divides gas detecting instrument to arrange less
Air-supply and blower unit, but flow field tissue is unreasonable, and to carry the mixed gas of toxic and harmful gas can not enter test side, shadow
Gas detection reliability has been rung, therefore has been necessary to design the gas-detecting device that a kind of air supply mode is reasonable, detection reliability is high.
The content of the invention
It is an object of the invention to propose a kind of far firing range, gas blending is strong, reliability is high is applied to safety inspection
Jetting type gas sensing system and method.
A kind of jetting type gas sensing system suitable for safety inspection, it is characterised in that：The system is gentle by air-supply post
Post two parts composition is surveyed in physical examination；Air inlet wherein is disposed with the shell of air-supply post bottom, is disposed with from bottom to top inside post of blowing
Pressure fan and ajutage；Wherein ajutage is arranged vertically, and jet nozzle is provided with ajutage；Wherein outside gas detection post bottom
Shell is disposed with air outlet, and air-introduced machine and induced duct are disposed with from top to bottom inside gas detection post；Wherein induced duct is arranged vertically,
Gas trapping mouth is installed on induced duct, is also equipped with detector；Wherein jet nozzle outlet is relative with gas trapping mouth
Arrangement.
The method of the described jetting type gas sensing system suitable for safety inspection, it is characterised in that：Gas is being blown
In the presence of machine, sprayed by the jet nozzle being arranged on ajutage, the gas for driving the gentle physical examination of air-supply post to survey among post,
Gas trapping mouth is flowed in the lump, when gas is reached near trapping mouth, is entered detector by induced draft blower withdraws, is then passed through
Air-introduced machine is from the air outlet discharge of gas detection post bottom, when containing gas to be detected in the gas that the gentle physical examination of air-supply post is surveyed between post
During body, detector sends sound and light alarm.
The jetting type gas sensing system suitable for safety inspection, it is characterised in that：The jet nozzle and gas
Mouth is trapped, jet nozzle and gas trapping mouth number are equal, in pairs arrangement.
The jetting type gas sensing system suitable for safety inspection, it is characterised in that：The jet nozzle to be multiple,
Gas trapping mouth is one；All jet nozzles export equal face gas trapping mouth.
The jetting type gas sensing system suitable for safety inspection, it is characterised in that：The jet nozzle is tapered
Square nozzle or tapering type side turn the petal nozzle of circle or tapered flaring side turns the petal nozzle of circle.
The jetting type blower fan and air draught type gas sensing system suitable for safety inspection, it is characterised in that：Gas is caught
Ji Kou is tapering type trapping mouth.
The jetting type blower fan and air draught type gas sensing system suitable for safety inspection, it is characterised in that：Air-supply post
The profile that post is surveyed in gentle physical examination is cylinder, is prismatic.
The present invention arranges multiple special jet nozzles on air-supply post, ensure that gas detects while range is improved
Gas blending around system is abundant；Gas trapping mouth on gas detection post is designed to tapered fashion, the suction of gas suction side
Wind area is larger, increases gas trapping amount, ensure that the gas homomergic flow after blending crosses detector, gas detection is reliable
Property it is high.Especially suitable for the occasion population mobilities such as station, subway station, high ferro station, airport, movie theatre are big, densely populated place occasion has
The detection of malicious pernicious gas or liquid.
Brief description of the drawings
Fig. 1 is nozzle and the man-to-man jetting type gas sensing system suitable for safety inspection of gas trapping mouth；
Fig. 2 is nozzle and the many-to-one jetting type gas sensing system suitable for safety inspection of gas trapping mouth；
Fig. 3 is tapered square nozzle diagram, wherein（a）Tapered square nozzle graphics,（b）Tapered square nozzle side view,（c）
The front view in tapered square nozzle exit；
Fig. 4 is that tapered side turns the petal nozzle diagram of circle, wherein（a）Tapered side turns the petal nozzle graphics of circle,（b）Tapered side
Turn the petal nozzle side view of circle,（c）Tapered side turns the front view of the petal nozzle exit of circle；
Fig. 5 is that tapered flaring side turns the petal nozzle diagram of circle, wherein（a）Tapered flaring side turns the petal nozzle graphics of circle,
（b）Tapered flaring side turns the petal nozzle side view of circle,（c）Tapered flaring side turns the front view of the petal nozzle exit of circle；
Fig. 6 square nozzle exit flow field contoured velocity figures
The tapered square nozzle exit flow field contoured velocity figures of Fig. 7
The tapered sides of Fig. 8 turn the petal jet expansion flow field velocity isogram of circle
The tapered flaring sides of Fig. 9 turn the petal jet expansion flow field velocity isogram of circle
Label title in figure：1- air inlets, 2- pressure fan, 3- jet nozzles, 4- gas trappings mouth, 5- air-introduced machines, 6- air outlets,
7- detectors, 8- air-supplies post, 9- gases detection post, 10- ajutages, 11- induced ducts
Specific implementation method
Below in conjunction with the accompanying drawings 1 and accompanying drawing 2 introduce jetting type blower fan and air draught type gas sensing system suitable for safety inspection
Method of work：Gas is sprayed in the presence of pressure fan 2 by the jet nozzle 3 being arranged on ajutage 10, drives air-supply post
The gas that 8 gentle physical examinations are surveyed among post 9, flows to gas trapping mouth 4 in the lump, when gas is reached near trapping mouth 4, by air-introduced machine
5 are drawn into detector 7, then detect the bottom air outlet 6 of post 9 from gas by air-introduced machine 5 and discharge, when air-supply post is gentle
When containing gas to be detected in the gas that physical examination is surveyed between post, detector 7 sends sound and light alarm.
Special jet nozzle is installed on air-supply post upcast ventilation pipe, that is, improves air-supply range, in turn ensure that gas detection system
The blending of system ambient gas is abundant, realizes whole gas detecting system high reliability.
Experimental verification
Numerical Experiment is the powerful of Study of Fluid flowing, and many research institutions are in a new construction or new technology beforehand research
Stage all can carry out numerical simulation study to the new construction or new technology.Obtained by Numerical Experiment method validation：This hair
Bright designed nozzle has farther range, stronger gas mixing capacity relative to traditional square nozzle.Numerical simulation
Following setting is done in research to boundary condition：Nozzle inlet uses speed import, inlet velocity 6m/s, with the market money gas
The air supply velocity of detecting system is identical；Consider beyond jet expansion flow of fluid, reference pressure 1atm in 1 cubic space；Nozzle
Wall is arranged to smooth without sliding wall.
1 cubic metre of fluid space middle section velocity field beyond jet expansion is analyzed, obtained result such as Fig. 6-Fig. 9
It is shown.The mixing capacity of each jet expansion fluid is considered using flow velocity 1m/s as border, it is equivalent as the velocity field shown in Fig. 6-Fig. 9
The mixing capacity that line chart can be seen that three kinds of new type nozzle outlet fluids is all higher than conventional square nozzle, new type nozzle convection current
The Involving velocity of fluid is all higher than convention square nozzle in.From the point of view of velocity amplitude, convention square nozzle core flow velocity is 2m/s,
Tapered square nozzle outlet core flow rate is more than 9m/s, and tapered side turns to justify petal nozzle core flow velocity and is more than 11m/s, it is tapered gradually
Expansion side turns the petal nozzle core flow velocity of circle and is more than 3m/s, it can thus be appreciated that the practical range of three kinds of new type nozzles is all higher than tradition side
Shape nozzle.
Claims (7)
- A kind of 1. jetting type gas sensing system suitable for safety inspection, it is characterised in that：The system is by air-supply post（8）Post is surveyed in gentle physical examination（9）Two parts form；Wherein blow post（8）Air inlet is disposed with the shell of bottom（1）, post of blowing（8）Inside is disposed with pressure fan from bottom to top （2）And ajutage（10）；Wherein ajutage（10）It is arranged vertically, ajutage（10）On jet nozzle is installed（3）；Wherein gas detection post（9）Bottom shell is disposed with air outlet（6）, gas detection post（9）Inside is disposed with from top to bottom Air-introduced machine（5）And induced duct（11）；Wherein induced duct（11）It is arranged vertically, induced duct（11）On gas trapping mouth is installed（4）, It is also equipped with detector（7）；Wherein jet nozzle（3）Outlet and gas trapping mouth（4）It is positioned opposite.
- 2. the induction system according to claim 1 suitable for safety inspection, it is characterised in that：The jet nozzle（3）With gas trapping mouth（4）, jet nozzle（3）With gas trapping mouth（4）Number is equal, paired cloth Put.
- 3. the induction system according to claim 1 suitable for safety inspection, it is characterised in that：The jet nozzle（3）To be multiple, gas trapping mouth（4）For one；All jet nozzles（3）Equal face gas is exported to catch Ji Kou（4）.
- 4. the induction system according to claim 1 suitable for safety inspection, it is characterised in that：The jet nozzle（3）Turn the petal nozzle of circle for tapered square nozzle or tapering type side or tapered flaring side turns circle flower Lobed nozzle.
- 5. the induction system according to claim 1 suitable for safety inspection, it is characterised in that：The gas trapping mouth（4）For tapering type trapping mouth.
- 6. the induction system according to claim 1 suitable for safety inspection, it is characterised in that：Air-supply post（8）Post is surveyed in gentle physical examination（9）Profile be cylinder, be prismatic.
- 7. the method for the induction system according to claim 1 suitable for safety inspection, it is characterised in that：Gas is in pressure fan（2）In the presence of, by being arranged in ajutage（10）On jet nozzle（3）Spray, drive air-supply Post（8）Post is surveyed in gentle physical examination（9）Middle gas, flows to gas trapping mouth in the lump（4）, when gas reaches trapping mouth（4）Near When, by air-introduced machine（5）It is drawn into detector（7）, then pass through air-introduced machine（5）Post is detected from gas（9）Bottom air-out Mouthful（6）Discharge, when containing gas to be detected in the gas that the gentle physical examination of post of blowing is surveyed between post, detector（7）Send Sound and light alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711138746.9A CN107843467A (en) | 2017-11-16 | 2017-11-16 | Suitable for the jetting type gas sensing system and method for safety inspection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711138746.9A CN107843467A (en) | 2017-11-16 | 2017-11-16 | Suitable for the jetting type gas sensing system and method for safety inspection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107843467A true CN107843467A (en) | 2018-03-27 |
Family
ID=61679651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711138746.9A Pending CN107843467A (en) | 2017-11-16 | 2017-11-16 | Suitable for the jetting type gas sensing system and method for safety inspection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107843467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3570022A1 (en) * | 2018-05-16 | 2019-11-20 | Grib Co., Ltd. | Gas detection apparatus |
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|---|---|---|---|---|
| GB1319313A (en) * | 1969-06-20 | 1973-06-06 | Canadian Patents Dev | Method and apparatus for measuring the density of a fluid |
| CN2164927Y (en) * | 1993-09-06 | 1994-05-18 | 唐山钢铁(集团)公司 | Gas curtain type fume catcher |
| CN1131263A (en) * | 1995-01-23 | 1996-09-18 | 日本弗拉克特株式会社 | Blowing unit, ventilating method and ventilating system for parking area |
| CN101614721A (en) * | 2008-06-27 | 2009-12-30 | 同方威视技术股份有限公司 | Detect the pedestrains safety inspection door of drugs, explosive and metal |
| CN101936825A (en) * | 2009-06-30 | 2011-01-05 | 同方威视技术股份有限公司 | Jetted air collecting device and gate type pedestrian security inspection equipment using same |
| CN102165258A (en) * | 2008-09-29 | 2011-08-24 | 西门子公司 | Fuel nozzle |
| CN106391341A (en) * | 2016-09-07 | 2017-02-15 | 中国神华能源股份有限公司 | Nozzle and steam ejector |
| CN106525950A (en) * | 2016-02-01 | 2017-03-22 | 北京理工大学 | Mass spectrometric analysis safety check system |
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-
2017
- 2017-11-16 CN CN201711138746.9A patent/CN107843467A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
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| CN2164927Y (en) * | 1993-09-06 | 1994-05-18 | 唐山钢铁(集团)公司 | Gas curtain type fume catcher |
| CN1131263A (en) * | 1995-01-23 | 1996-09-18 | 日本弗拉克特株式会社 | Blowing unit, ventilating method and ventilating system for parking area |
| CN101614721A (en) * | 2008-06-27 | 2009-12-30 | 同方威视技术股份有限公司 | Detect the pedestrains safety inspection door of drugs, explosive and metal |
| CN102165258A (en) * | 2008-09-29 | 2011-08-24 | 西门子公司 | Fuel nozzle |
| CN101936825A (en) * | 2009-06-30 | 2011-01-05 | 同方威视技术股份有限公司 | Jetted air collecting device and gate type pedestrian security inspection equipment using same |
| CN106525950A (en) * | 2016-02-01 | 2017-03-22 | 北京理工大学 | Mass spectrometric analysis safety check system |
| CN106391341A (en) * | 2016-09-07 | 2017-02-15 | 中国神华能源股份有限公司 | Nozzle and steam ejector |
| CN106872557A (en) * | 2017-02-28 | 2017-06-20 | 苏州安益谱精密仪器有限公司 | Safe examination system, Ion transfer spectrum detection device and safety inspection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3570022A1 (en) * | 2018-05-16 | 2019-11-20 | Grib Co., Ltd. | Gas detection apparatus |
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Application publication date: 20180327 |
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