CN207689211U - Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system - Google Patents
Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system Download PDFInfo
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- CN207689211U CN207689211U CN201721894437.XU CN201721894437U CN207689211U CN 207689211 U CN207689211 U CN 207689211U CN 201721894437 U CN201721894437 U CN 201721894437U CN 207689211 U CN207689211 U CN 207689211U
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- 238000005070 sampling Methods 0.000 title claims abstract description 156
- 239000013618 particulate matter Substances 0.000 title claims abstract description 72
- 239000000356 contaminant Substances 0.000 title claims abstract description 14
- 230000001052 transient effect Effects 0.000 claims abstract description 7
- 239000012855 volatile organic compound Substances 0.000 claims description 44
- 239000012895 dilution Substances 0.000 claims description 8
- 238000010790 dilution Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 16
- 239000005416 organic matter Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
In order to solve the technical issues of offline method of sampling of existing time segment can not reflect discharge characteristics of the vehicle under various operating modes, the utility model provides a kind of motor-vehicle tail-gas particulate matter can be used for real road on-road emission test and volatile organic contaminant divided working status sampling system.The utility model is by being arranged multiple parallel sampling channels, the keying of sampling channel is controlled according to transient state speed/exhaust flow using divided working status sampling controller, to realize that the divided working status synchronized sampling of volatile organic matter, particulate matter and semi-volatile organic matter, sampled result can reflect discharge characteristics of the vehicle under different operating modes well.The utility model is applied widely, can flexibly set the quantity of corresponding acquisition channel and the speed/range of flow in each channel, to meet different testing requirements.
Description
Technical field
The utility model belongs to environment supervision instrument technical field, and being related to a kind of motor-vehicle tail-gas particulate matter and volatility has
Machine pollutant divided working status sampling system.
Background technology
Recently as the increase of vehicle guaranteeding organic quantity, vehicular emission is increasingly becoming the main source of air pollution.Machine
The organic matter (such as polycyclic aromatic hydrocarbon) that a large amount of solid phases and gas phase are contained in the pollutant of Motor Car Institute discharge, it is strong to seriously endanger human body
Health.For better management and control vehicular emission, need to carry out a large amount of testing research work.Traditionally, motor vehicle (or engine)
Simulation test is carried out mainly on laboratory bench.Existing discharge standard requires nothing more than laboratory bench test and carries out motor-driven vehicle
The time segment of aerated particle object (PM) samples offline, and to volatile organic matter (VOCs) and semi-volatile organic matter (SVOCs)
It there is no measurement request.In addition, although laboratory bench test is easy to control measurement condition, test result repeatability is preferable, by
It is complicated and changeable in the real road operating mode of motor vehicle, it is likely to occur discharge in actual use and is sharply increased, thus test
Room engine bench test can not reflect the true horizon that vehicle discharges on real road.
Therefore, real road on-road emission test gradually becomes one of the main stream approach of vehicular emission test, in the world
There are a large amount of researchs for using carring method measurement vehicle in real road gaseous pollutant discharge characteristics.However, PM, SVOCs and
The organic matter sampled measurements of the different phases such as VOCs are still the difficult point of carried on vehicle emission test correlative study, and reason is existing
There is the offline method of sampling of time segment that can not precisely reflect discharge characteristics of the vehicle under various operating modes.
Utility model content
It can not reflect discharge characteristics of the vehicle under various operating modes to solve the offline method of sampling of existing time segment
Technical problem, the utility model provide a kind of motor-vehicle tail-gas particulate matter can be used for real road on-road emission test and volatility
Organic pollution divided working status sampling system.
The technical solution of the utility model is：
Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system, including control host；Its is special
Place is：Further include the equal offline sampling instruments of divided working status VOCs, the divided working status PM and SVOCs being connected with the control host offline
Sampling instrument；
The offline sampling instruments of divided working status VOCs include the first divided working status sampling controller and multiple parallel arrangement of VOCs
Sampling channel；
The first divided working status sampling controller is for obtaining transient state speed/exhaust flow, according to acquired information control
Make the keying of the VOCs sampling channels；
The arrival end of each VOCs sampling channels passes through the tail of the first divided working status sampling controller and sampling system front end
Gas dilution system is connected to, and the outlet end of each VOCs sampling channels is respectively connected with VOCs vacuum sample cans；Each VOCs samplings are logical
The flow control valve being connected with the control host is additionally provided on road；
The offline sampling instruments of divided working status PM and SVOCs include the pre- clasfficiator of particulate matter, the second divided working status sampling controller,
And multiple parallel arrangement of PM and SVOCs sampling channels；
The second divided working status sampling controller is for obtaining transient state speed/exhaust flow, according to acquired information control
Make the keying of the PM and SVOCs sampling channels；
The arrival end of each PM and SVOCs sampling channels is pre- by the second divided working status sampling controller and the particulate matter
The outlet end of clasfficiator is connected to, and the arrival end of the pre- clasfficiator of particulate matter is connected to the tail gas dilution system of sampling system front end, institute
Have PM and SVOCs sampling channels exit be both provided with vacuum air pump or all PM and SVOCs sampling channels outlet converge at
Same pipeline is provided with vacuum air pump on the pipeline；The vacuum air pump is connected with the control host；
Be additionally provided on each PM and SVOCs sampling channels PM and SVOCs sampling units and with the control host phase
Flow controller even, and between the pre- clasfficiator of the particulate matter and vacuum air pump；
The first divided working status sampling controller and the second divided working status sampling controller are connected with the control host.
Further, the pressure sensing being connected with the control host is additionally provided on each PM and SVOCs sampling channels
Device.
Further, all PM and SVOCs sampling units are all disposed in temperature control box；The temperature control box is led with the control
Machine is connected.
Further, the sample lines of the VOCs sampling channels use polyfluortetraethylene pipe.
Further, the sample lines of the PM and SVOCs sampling channels use carbon fiber pipe.
Further, the cut diameter of the pre- clasfficiator of the particulate matter is 2.5 μm.
Further, there are three the VOCs sampling channels, three low speed, middling speed, high speed speed sections are corresponded to respectively, or
Basic, normal, high three exhaust flow sections are corresponded to respectively；There are three PM the and SVOCs sampling channels, correspond to respectively low speed, middling speed,
Three speed sections at a high speed, or basic, normal, high three exhaust flow sections are corresponded to respectively.
Further, PM the and SVOCs sampling units include that particle sampling is housed along what airflow direction was set gradually
The filter membrane bracket of filter membrane and the SVOCs filter core cylinders equipped with PUF.
Further, the control host has human-computer interaction function.
The utility model has the advantages that：
The utility model realizes volatile organic matter (VOCs), particulate matter (PM) and half volatile in motor-vehicle tail-gas
The divided working status synchronized sampling of organic matter (SVOCs), sampled result can reflect discharge characteristics of the vehicle under different operating modes well.
The utility model is applied widely, can flexibly set the quantity of corresponding acquisition channel and the speed/stream in each channel
Range is measured, to meet different testing requirements.
Description of the drawings
Fig. 1 is the utility model embodiment schematic diagram.
Reference sign：
The offline sampling instruments of 1- divided working status VOCs, 11-VOCs vacuum sample cans, 12- flow control valves, 13- sample lines,
14- the first divided working status sampling controllers；
The offline sampling instrument of 2- divided working status PM and SVOCs, 21- vacuum air pumps, 22- flow controllers, 23- sample lines, 24-
Pressure sensor, 25-PM and SVOCs sampling units, 251- filter membrane brackets, 252-SVOCs filter core cylinders, 26- temperature control boxs, 27-
Two divided working status sampling controllers, the pre- clasfficiator of 28- particulate matters；
3- ancillary equipments, 4- control host.
Specific implementation mode
Explanation is further explained to the utility model below in conjunction with attached drawing.
Referring to Fig. 1, the present embodiment motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system, including
Host 4 is controlled, and the offline sampling instruments 1 of divided working status VOCs, the divided working status PM and SVOCs that are connected with control host 4 are adopted offline
Sample instrument 2；
The offline sampling instruments of divided working status VOCs 1 include the first divided working status sampling controller 14 and three being connected with control host 4
A parallel arrangement of VOCs sampling channels；Three VOCs sampling channels correspond to three low speed, middling speed, high speed speed sections respectively, or
Person corresponds to basic, normal, high three exhaust flow sections respectively；In other embodiments, it is possibility to have three or more VOCs samplings are logical
Road, corresponding speed section/exhaust flow section can be segmented according to actual samples demand；Since polyfluortetraethylene pipe can be born
Positive pressure 1.6Mpa, negative pressure 77Kpa, high temperature resistant, low temperature resistant (can in -60 DEG C~+260 DEG C normal use), have extremely excellent change
Stability is learned, reliable excellent corrosion resistance (to most of chemicals and solvent, shows inertia, energy strong alkali-acid resistance, water
With various organic solvents), therefore the material selection polytetrafluoroethylene (PTFE) of the sample lines 13 of the present embodiment VOCs sampling channels；
First divided working status sampling controller 14 is used to obtain transient state speed/exhaust flow from ancillary equipment 3, according to acquired
Information control three VOCs sampling channels open and close；The arrival end of each VOCs sampling channels passes through first division of labor
Condition sampling controller is connected to the outlet end of the tail gas dilution system positioned at sampling system front end, and each VOCs sampling channels go out
Mouth end is respectively connected with VOCs vacuum sample can 11；Environment is negative pressure relative to ambient pressure in the tank of VOCs vacuum sample can 11,
Sampling power can be provided；Be additionally provided on each VOCs sampling channels be connected with control host 4 be used to adjust sample streams
Measure the flow control valve 12 of size；Pressure gauge is mounted on each flow control valve 12, the pressure gauge and VOCs samplings are logical
The sample lines 13 in road are connected to；After VOCs vacuum sample can 11 is opened, is changed by pressure gauge registration, can check that VOCs is adopted
The air-tightness of sample channel sample pipeline；
Ancillary equipment 3 can be satellite navigation and location system, can be that the first divided working status sampling controller 14 provides real-time vehicle
Speed；It can also be automobile ECU digital independent equipment, can be that the first divided working status sampling controller 14 provides real-time speed/tail gas stream
Amount；It can also be existing portable car-mounted test system on the market, can be that the first divided working status sampling controller 14 provide in real time
Speed/exhaust flow；
When work, (it is not the part of the utility model, is existing instrument, due to motor-driven vehicle through tail gas dilution system
Gas Pollutant emission concentration is higher, so needing equal proportion to dilute before sampling) dilution after tail gas, it is offline from divided working status VOCs
Sampling instrument air inlet enters three VOCs sampling channels, and the VOCs in tail gas is collected by corresponding VOCs vacuum sample can 11, is realized
Three speeds/exhaust flow section acquires simultaneously.
The offline sampling instruments 2 of divided working status PM and SVOCs include the pre- clasfficiator 28 of particulate matter, with control host 4 be connected second
Divided working status sampling controller 27 and three parallel arrangement of PM and SVOCs sampling channels；Particulate matter is classified in advance in the present embodiment
The cut diameter of device 28 is 2.5 μm, and it is that 1 μm of particulate matter at least 99% (mass concentration) enters into and through it and goes out that can make grain size
Mouthful；Three PM and SVOCs sampling channels correspond to three low speed, middling speed, high speed speed sections respectively, or correspond to respectively basic, normal, high
Three exhaust flow sections.In other embodiments, it is possibility to have three or more PM and SVOCs sampling channels correspond to respectively
Speed section/exhaust flow section can be segmented according to actual samples demand；Since carbon fiber pipe intensity is high, corrosion-resistant, endurance, resists
Creep has many advantages, such as that conductive (antistatic absorption) property, coefficient of thermal expansion be small, energy-absorbing antidetonation, the present embodiment PM and SVOCs sampling
The material selection carbon fiber pipe of the sample lines 23 in channel；Wherein, the electric conductivity of carbon fiber pipe can prevent particulate matter from sampling
Electrostatic Absorption occurs when being transmitted in pipeline；
Second divided working status sampling controller 27 is used to obtain transient state speed/exhaust flow from ancillary equipment 3, according to acquired
Information control PM and SVOCs sampling channels open and close；The arrival end of each PM and SVOCs sampling channels is by the
The outlet end of the pre- clasfficiator of two divided working status sampling controllers and particulate matter 28 is connected to, the arrival end of the pre- clasfficiator of particulate matter 28 and position
It is connected in the outlet end of the tail gas dilution system of the utility model front end, all PM and SVOCs sampling channels outlets converge at same
One pipeline, the vacuum air pump 21 being connected with control host 4 is provided on the pipeline, and vacuum air pump 21 samples power for providing；
It is additionally provided with PM and SVOCs sampling units 25 on each PM and SVOCs sampling channels and what is be connected with control host 4 be used to adjust
The flow controller 22 of sampling flow size, PM and SVOCs sampling units 25 and flow controller 22 are located at particulate matter and are classified in advance
Between device 28 and vacuum air pump 21；Second divided working status sampling controller 27 is connected with control host 4；
Ancillary equipment 3 can be satellite navigation and location system, can be that the second divided working status sampling controller 27 provides real-time vehicle
Speed；It can also be automobile ECU digital independent equipment, can be that the second divided working status sampling controller 27 provides real-time speed/tail gas stream
Amount；It can also be existing portable car-mounted test system on the market, can be that the second divided working status sampling controller 27 provide in real time
Speed/exhaust flow；First divided working status sampling controller 14 and the second divided working status sampling controller 27 can also share a set of auxiliary
Help equipment 3.
PM and SVOCs sampling units 25 include the filter membrane support equipped with particle sampling filter membrane set gradually along airflow direction
Frame 251 and SVOCs filter core cylinders 252 equipped with PUF；
In view of gas, solid phase SVOCs can change the distributed mutually of SVOCs with the variation of temperature, (such as gas phase SVOCs turns
Become solid phase SOVCs), therefore, the present embodiment by divided working status PM and SVOCs three sampling channels of offline sampling instrument PM and
SVOCs sampling units 25 are all disposed in the temperature control box 26 being connected with control host 4, and SVOCs is acquired list by temperature control box 26
Temperature is constant within a certain range in member, changes the phase point of SVOCs with the variation of temperature after sampling to avoid SVOCs
Cloth.Furthermore it is also possible to by changing the temperature in temperature control box 26, influence of the different sample temperatures to SVOCs sampled results is studied.
In order to realize the leak detection function of sampling system, prevent sample gas from losing, the present embodiment is also sampled in each PM and SVOCs
It may be contained within the connected pressure sensor 24 of control host 4 on channel；Before sampling, sample lines air-tightness can be first checked.
When work, vacuum air pump 21 extracts tail gas with constant flow rate, and tail gas is from the offline sampling instrument of divided working status PM and SVOCs 2
Air inlet enters three PM and SVOCs sampling channels, and the PM less than 2.5 μm in tail gas is by the pre- clasfficiator 28 of particulate matter from tail gas
In separate, be trapped on the particle sampling filter membrane of known quality, and SVOCs is fitted with the SVOCs filter core cylinders 252 of PUF
It collects, to realize three speeds/exhaust flow section PM particulate matters, SVOCs synchronized samplings.
In addition, the present embodiment control host 4 has touch display screen, and it is mounted with controlling of sampling software, there is man-machine friendship
Mutual function can be instructed by touch display screen input sample thereon, such as sampling timing, delay sampling, timing sampling, inquiry
Sampled data etc.；Also sample introduction sequence, trigger parameter etc. can be set to realize divided working status controlling of sampling by controlling host.
Claims (9)
1. motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system, including control host (4)；Its feature
It is：Further include it is equal with it is described control host (4) be connected the offline sampling instruments of divided working status VOCs (1), divided working status PM and SVOCs from
Line sampling instrument (2)；
The offline sampling instruments of divided working status VOCs (1) include the first divided working status sampling controller (14) and multiple parallel arrangement of
VOCs sampling channels；
The first divided working status sampling controller (14) is for obtaining transient state speed/exhaust flow, according to acquired information control
Make the keying of the VOCs sampling channels；
The arrival end of each VOCs sampling channels passes through the tail of the first divided working status sampling controller (14) and sampling system front end
Gas dilution system is connected to, and the outlet end of each VOCs sampling channels is respectively connected with VOCs vacuum sample can (11)；Each VOCs is adopted
The flow control valve (12) being connected with the control host (4) is both provided on sample channel；
The offline sampling instruments of divided working status PM and SVOCs (2) include the pre- clasfficiator of particulate matter (28), the second divided working status controlling of sampling
Device (27) and multiple parallel arrangement of PM and SVOCs sampling channels；
The second divided working status sampling controller (27) is for obtaining transient state speed/exhaust flow, according to acquired information control
Make the keying of the PM and SVOCs sampling channels；
The arrival end of each PM and SVOCs sampling channels is pre- by the second divided working status sampling controller (27) and the particulate matter
The outlet end of clasfficiator (28) is connected to, the arrival end of the pre- clasfficiator of particulate matter (28) and the tail gas dilution system of sampling system front end
Connection, all PM and SVOCs sampling channels exit is both provided with vacuum air pump (21) or all PM and SVOCs samplings are logical
Road outlet converges at same pipeline, and vacuum air pump (21) is provided on the pipeline；The vacuum air pump (21) and the control
Host (4) is connected；
Be additionally provided on each PM and SVOCs sampling channels PM and SVOCs sampling units (25) and with the control host (4)
Connected flow controller (22), and between the pre- clasfficiator of the particulate matter (28) and vacuum air pump (21)；
The first divided working status sampling controller (14) and the second divided working status sampling controller (27) with the control host (4)
It is connected.
2. motor-vehicle tail-gas particulate matter according to claim 1 and volatile organic contaminant divided working status sampling system,
It is characterized in that：The pressure sensor being connected with the control host (4) is additionally provided on each PM and SVOCs sampling channels
(24)。
3. motor-vehicle tail-gas particulate matter according to claim 2 and volatile organic contaminant divided working status sampling system,
It is characterized in that：All PM and SVOCs sampling units (25) are all disposed in temperature control box (26)；The temperature control box (26) and the control
Host (4) processed is connected.
4. motor-vehicle tail-gas particulate matter according to claim 3 and volatile organic contaminant divided working status sampling system,
It is characterized in that：The sample lines (13) of the VOCs sampling channels use polyfluortetraethylene pipe.
5. motor-vehicle tail-gas particulate matter according to claim 4 and volatile organic contaminant divided working status sampling system,
It is characterized in that：The sample lines (23) of the PM and SVOCs sampling channels use carbon fiber pipe.
6. motor-vehicle tail-gas particulate matter according to claim 5 and volatile organic contaminant divided working status sampling system,
It is characterized in that：The cut diameter of the pre- clasfficiator of particulate matter (28) is 2.5 μm.
7. according to any motor-vehicle tail-gas particulate matters of claim 1-6 and volatile organic contaminant divided working status sampling system
System, it is characterised in that：There are three the VOCs sampling channels, corresponds to three low speed, middling speed, high speed speed sections, Huo Zhefen respectively
Basic, normal, high three exhaust flow sections are not corresponded to；
There are three PM the and SVOCs sampling channels, corresponds to three low speed, middling speed, high speed speed sections respectively, or correspond to respectively
Basic, normal, high three exhaust flow sections.
8. according to any motor-vehicle tail-gas particulate matters of claim 1-6 and volatile organic contaminant divided working status sampling system
System, it is characterised in that：PM the and SVOCs sampling units (25) include that particle sampling is housed along what airflow direction was set gradually
The filter membrane bracket (251) of filter membrane and the SVOCs filter core cylinders (252) equipped with PUF.
9. motor-vehicle tail-gas particulate matter according to claim 1 and volatile organic contaminant divided working status sampling system,
It is characterized in that：The control host (4) has human-computer interaction function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721894437.XU CN207689211U (en) | 2017-12-28 | 2017-12-28 | Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721894437.XU CN207689211U (en) | 2017-12-28 | 2017-12-28 | Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system |
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| Publication Number | Publication Date |
|---|---|
| CN207689211U true CN207689211U (en) | 2018-08-03 |
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ID=62992892
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721894437.XU Withdrawn - After Issue CN207689211U (en) | 2017-12-28 | 2017-12-28 | Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system |
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| CN (1) | CN207689211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106887A (en) * | 2017-12-28 | 2018-06-01 | 清华大学 | Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system |
-
2017
- 2017-12-28 CN CN201721894437.XU patent/CN207689211U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106887A (en) * | 2017-12-28 | 2018-06-01 | 清华大学 | Motor-vehicle tail-gas particulate matter and volatile organic contaminant divided working status sampling system |
| CN108106887B (en) * | 2017-12-28 | 2024-04-09 | 清华大学 | System for sampling particulate matters and volatile organic pollutants in tail gas of motor vehicle according to working conditions |
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