CN106706855A - Nitrogen continuous supply device, automobile part VOC testing device and testing method - Google Patents
Nitrogen continuous supply device, automobile part VOC testing device and testing method Download PDFInfo
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- CN106706855A CN106706855A CN201611258566.XA CN201611258566A CN106706855A CN 106706855 A CN106706855 A CN 106706855A CN 201611258566 A CN201611258566 A CN 201611258566A CN 106706855 A CN106706855 A CN 106706855A
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- nitrogen
- sampler bag
- auto parts
- waste gas
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 440
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 220
- 238000012360 testing method Methods 0.000 title claims abstract description 82
- 239000007789 gas Substances 0.000 claims abstract description 56
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 230000007613 environmental effect Effects 0.000 claims description 90
- 239000002912 waste gas Substances 0.000 claims description 69
- 238000012546 transfer Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000010998 test method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 abstract description 22
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009931 harmful effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000012855 volatile organic compound Substances 0.000 description 45
- 229920001296 polysiloxane Polymers 0.000 description 29
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 230000000505 pernicious effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- STNJBCKSHOAVAJ-UHFFFAOYSA-N Methacrolein Chemical compound CC(=C)C=O STNJBCKSHOAVAJ-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 108010066057 cabin-1 Proteins 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- HORQAOAYAYGIBM-UHFFFAOYSA-N 2,4-dinitrophenylhydrazine Chemical compound NNC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O HORQAOAYAYGIBM-UHFFFAOYSA-N 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G01N33/0011—Sample conditioning
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
-
- 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
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0047—Organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a nitrogen continuous supply device, an automobile part VOC testing device and a testing method. The automobile part VOC testing device comprises an environment chamber, an exhaust emission device and the nitrogen continuous supply device, wherein both the nitrogen continuous supply device and the exhaust emission device are arranged outside the environment chamber; the exhaust emission device is provided with a plurality of exhaust emission end openings; a plurality of ducts penetrate through the wall of the environment chamber; a testing containing chamber used for laying a sampling bag is arranged inside the environment chamber; one end of each duct serves as a sampling bag connecting end used for being connected with the sampling bag inside the environment chamber; the other end of the duct serves as an external connecting end used for being connected with an nitrogen output end opening or the exhaust emission end opening. The testing device and the testing method can improve the efficiency of an automobile part VOC testing experiment, is beneficial to the reduction of the testing cost, can further reduce the emission of high-temperature harmful gas in a working place, and can improve the work environment of workers.
Description
Technical field
The present invention relates to automotive field, more particularly to a kind of nitrogen continuous feeding device, auto parts and components VOC test devices
And method of testing.
Background technology
With the raising of Public environmental attitude, in-vehicle air pollution problem is increasingly closed by consumer and environmental administration
Note and attention, and the source of in-vehicle air pollution is mainly the volatile organic matter that interior trim parts and material are discharged
(Volatile Organic Compounds, abbreviation VOC).At present, automobile main frame maker, parts manufacturer and material supplier
Input extensive work carries out VOC researchs and control, so that in-car VOC meets laws and regulations requirement and environment inside car quality is possessed product
Product competitiveness.
Pocket type method is the main research meanses of auto parts and components VOC experiments, is entered using pocket type method more than current internal vapor depot
Row auto parts and components VOC is tested.Using polyvinyl fluoride sampler bag, parts are fitted into polyvinyl fluoride sampler bag, in sampler bag
The nitrogen of prescribed volume is filled with, sampler bag is positioned over into walk-in type environmental chamber in process of the test carries out heated baking, and heating is completed
Air sample therein is gathered from sampler bag afterwards to be tested and analyzed.However, the test examination for auto parts and components VOC at present
Test and generally there are problems with：
(1) at present in the testing experiment of auto parts and components VOC generally all using the plenum system of single nitrogen cylinder, and due to
The usage amount of nitrogen is huge, is easily caused the insufficient supply of nitrogen and has a strong impact on test efficiency.It is of different sizes according to parts,
The sampler bag specification selected in auto parts and components VOC experiments has 50L, 100L, 200L, 500L, 1000L and 2000L etc., 1000L
And 2000L sampler bag frequency of usage highests, so as to need to use a large amount of nitrogen in auto parts and components VOC processs of the test.With single
As a example by 2000L VOC sampler bags, after auto parts and components enclose sampler bag, need at normal temperatures be purged with nitrogen 3 times, nitrogen is poured every time
Tolerance is the 30% of sampler bag volume, that is, rushing single 2000L VOC and wash sampler bag need to use nitrogen 1800L；After the completion of flushing, again
The nitrogen of sampler bag volume 50% is poured, i.e., is filled using 1000L nitrogen；Thus, test preparatory stage, single 2000L
VOC sampler bags just need to consume 2800L nitrogen；And experimental stage, if 6 sampler bags are heated in walk-in type environmental chamber simultaneously, with 6
Calculated as a example by individual 2000L VOC sampler bags, need to consume 16800L nitrogen altogether.General single nitrogen cylinder can the supply of nitrogen 6000L,
In single test, 6 2000LVOC sampler bags need to consume 3 bottles of nitrogen.And supplied using single nitrogen cylinder
Mode, it is impossible to realize the continuous supply of nitrogen, causes usually to need to change nitrogen cylinder, and nitrogen cylinder changes time-consuming and inconvenience, often
There is the phenomenon that nitrogen supply (NS) is not enough and appearance is interrupted.
(2) at present, the nitrogen filling for sampler bag is typically all to be carried out in the outside of walk-in type environmental chamber, so as to adopt
Sample bag nitrogen filling needs the sampler bag that will be equipped with parts to transfer to the inside of walk-in type environmental chamber after finishing, this process
Many people's careful operations are needed, test efficiency can be also reduced.
(3) often generation auto parts and components are scraped in transfer process to be filled with nitrogen and the sampler bag equipped with auto parts and components
The phenomenon of broken sampler bag, and single 2000L VOC sampler bags cost is thousands of units, the consumption of sampler bag cause experimentation cost compared with
It is high.
(4) a large amount of high-temp waste gas produced in testing experiment at present are all in workplace discharge so that operating environment
Badly, serious harm testing crew is healthy.According to auto parts and components VOC test requirements documents, the VOC sampler bags equipped with parts
Heating-up temperature is 65 DEG C, and gaseous aldehyde sample 6L is gathered with DNPH pipes after the completion of heating, and benezene material gas is gathered with TNAX pipes
Sample 12L, after the completion of sampling, residue 982L high-temperature gases are discharged as waste gas in each sampler bag.Result of the test shows, toasts
Auto parts and components afterwards can give out that benzene, toluene, ethylbenzene, dimethylbenzene, styrene, formaldehyde, acetaldehyde, methacrylaldehyde etc. are a large amount of poisonous to be had
Evil gas, Long Term Contact such gas, it may appear that the symptom, severe patient such as dizzy, headache, nauseous, weak, throat and eyes discomfort
Respiratory system, nervous system equivalent damage can be caused, or even leukaemia etc. can be induced.
(5) if high-temp waste gas are discharged in the workplace where environmental chamber, can also be again introduced into walk-in type environmental chamber,
Pollution walk-in type environmental chamber, auto parts and components VOC is tested background concn has the risk existed beyond normal concentration requirement, does
Disturb result of the test accuracy.Auto parts and components VOC experiments need to be monitored to walk-in type environmental chamber and test site background, in cabin
Background beyond standard require when experiment can not carry out；Required in auto parts and components VOC testing standards, environmental background concentration need to expire
Foot：Toluene≤20ug/m3, formaldehyde≤20ug/m3；By taking background monitoring result in certain cabin as an example (as shown in table 1), toluene surpasses
About 4 times of mark, about 6 times of formaldehyde need to walk-in type environmental chamber be aerated purified treatment in one's power to test site.
Background monitoring result in table 1 certain walk-in type environmental chamber
(6) at present, to make walk-in type environmental chamber background concn meet test requirements document, air cleaning unit can be arranged in cabin,
Background concn reduction in cabin is made by the absorption of activated carbon, but the high-temp waste gas after off-test are in workplace, and discharge is laid equal stress on
It is new into after walk-in type environmental chamber walk-in type environmental chamber inside activated carbon to be made to accelerate consumption and gradually fail, cause walk-in type
Environmental chamber service life shortens；And the replacing of walk-in type environmental chamber air cleaning unit is related to section structure, maintenance cost is high.
The content of the invention
In order to solve the above technical problems, an object of the present invention is to provide a kind of nitrogen continuous feeding device, the nitrogen
Gas continuous feeding device can be during auto parts and components VOC testing experiments, it is to avoid the phenomenon of nitrogen supply (NS) interruption occur, have
Beneficial to lifting test efficiency.
If nitrogen continuous feeding device proposed by the invention include conveying main pipeline, at least two nitrogen supply sources and
Dry nitrogen output is in charge of, and each nitrogen supply source is connected with the conveying main pipeline respectively, and each nitrogen output is in charge of
It is connected with the conveying main pipeline respectively, the pipe port that the nitrogen output is in charge of constitutes nitrogen output port.
Optionally, it is connected by transfer pipeline between each nitrogen supply source and the conveying main pipeline, and
Check-valves and pressure-reducing valve are equipped with each transfer pipeline.
Optionally, the needle-valve for being equipped with and flow velocity being exported for adjusting nitrogen is in charge of in each nitrogen output.
In order to solve the above technical problems, another object of the present invention is to provide a kind of auto parts and components VOC test devices,
The test device can lift the efficiency of testing experiment, advantageously reduce experimentation cost, and be conducive to improving working environment.
Auto parts and components VOC test devices proposed by the invention include environmental chamber, exhaust extractor and above-mentioned
Nitrogen continuous feeding device, the nitrogen continuous feeding device and the exhaust extractor may be contained within the outer of the environmental chamber
Portion, the exhaust extractor is provided with some waste gas discharge ports, and the bulkhead of the environmental chamber is equipped with some conduits, the ring
It is the test cavity volume for placing sampler bag inside the cabin of border, one end of the conduit is for JA(junction ambient) cabin internal sample bag
Sampler bag connection end, the other end of the conduit is for connecting the outer of the nitrogen output port or the waste gas discharge port
Connect end.
Optionally, the bulkhead of the environmental chamber is provided with some thieff hatch, and the conduit is arranged in the thieff hatch.
Optionally, the nitrogen output port and the waste gas discharge port may be contained within the outer wall of the environmental chamber, and
The nitrogen output port is corresponded with the thieff hatch, and the waste gas discharge port is also corresponded with the thieff hatch.
Optionally, the exhaust extractor includes that the discharge of some waste gas is in charge of, and the environmental chamber is provided with nacelle exhaust duct,
Each waste gas is discharged to be in charge of and communicated with the nacelle exhaust duct respectively, and the pipe port composition that waste gas discharge is in charge of is described
Waste gas discharge port.
Optionally, the valve being provided with for controlling off-gas flows to be opened and closed is in charge of in each waste gas discharge.
Optionally, also including gas sampling device, the gas sampling device is arranged at the outside of the environmental chamber, and institute
Stating gas sampling device can be connected by pipeline with the external connection end of the conduit.
Auto parts and components VOC test devices of the invention are related to a kind of auto parts and components VOC method of testings, including following step
Suddenly：
S1, the inside of environmental chamber will be placed in built with the sampler bag of auto parts and components, and the sampler bag is connected to leads
The sampler bag connection end of pipe；
S2, nitrogen flushing is carried out to sampler bag：The external connection end of conduit is connected with nitrogen output port, makes nitrogen continuous
Feedway is filled with nitrogen to sampler bag by conduit, and then nitrogen output port is separated with the external connection end of conduit, then will lead
The external connection end of pipe is connected with waste gas discharge port, the nitrogen in sampler bag is discharged by exhaust extractor；
S3, nitrogen is poured again to the sampler bag after nitrogen is rinsed；
S4, the sampler bag equipped with auto parts and components and filled with nitrogen is heated by the temperature in set environment cabin；
S5, sample collection and test analysis are carried out to the gas in sampler bag by the external connection end of conduit；
S6, the external connection end of conduit is connected with waste gas discharge port, the waste gas in sampler bag is discharged by waste gas and fill
Put discharge.
Further, in step s 2, the number of times that the nitrogen is rinsed is set to three times, and is filled with the nitrogen of sampler bag every time
Volume be the 30% of sampler bag volume.
Further, in step s3, the volume for being filled with the nitrogen of sampler bag is the 50% of sampler bag volume.
Further, in step s 4, the temperature setting of the environmental chamber is 65 DEG C, and the time of heating is set as
120min。
Further, in step s 5, first by the external connection end of the conduit and the gas sampling being arranged on outside environmental chamber
Equipment is connected, then carries out sample collection and test analysis to the gas in sampler bag by the gas sampling device.
Implement the embodiment of the present invention, have the advantages that：
Nitrogen continuous feeding device of the invention include at least two nitrogen supply sources, and each nitrogen supply source respectively with
Conveying main pipeline is connected and forms parallel connection structure, is in charge of by the output of each nitrogen exports nitrogen afterwards, then its difference
In the mode that traditional single nitrogen cylinder is supplied, the supply of nitrogen on the one hand can be made to be largely increased, on the other hand worked as
When wherein some nitrogen supply source needs to be changed because nitrogen is not enough, other nitrogen supply sources still can normal work
Make such that it is able to ensure the continuous supply of nitrogen, it is to avoid the situation of supply discontinuity occur because of nitrogen supply (NS) deficiency, thus can carry
Rise the efficiency of experiment.
Auto parts and components VOC test devices of the invention include nitrogen continuous feeding device, exhaust extractor and ring
Border cabin, the nitrogen continuous feeding device and the exhaust extractor may be contained within the outside of the environmental chamber, the environment
The bulkhead in cabin is equipped with conduit, and conduit the sampler bag that can be used for inside JA(junction ambient) cabin of sampler bag connection end, conduit it is outer
Connect end to can be used to connect the nitrogen output port, then the nitrogen continuous feeding device can be to being arranged on inside environmental chamber
Sampler bag carries out the continuous supply of nitrogen, can avoid showing for supply discontinuity occur because of nitrogen supply (NS) deficiency in process of the test
As such that it is able to lift the efficiency of testing experiment, and the inside of environmental chamber can be placed directly within due to sampler bag and realize nitrogen
Supply, then after nitrogen filling is carried out to sampler bag, can be without sampler bag be retransferred into environmental chamber from the outside of environmental chamber
Inside, so as to can further improve test efficiency.In addition, being tested using auto parts and components VOC test devices of the invention
During experiment, because transfer sampler bag without shifting to sampler bag again, then can also be avoided during because auto parts and components are drawn
The loss broken sampler bag and bring, so as to experimentation cost can also be reduced effectively.Additionally, auto parts and components VOC tests of the invention
Device is due to including exhaust extractor, and the external connection end of conduit can also be used to connect the waste gas outlet side of exhaust extractor
Mouthful, then waste gas produced in sampler bag in process of the test can be by conduit and exhaust extractor from environmental chamber and its place
In workplace discharge, it is to avoid waste gas enter environmental chamber in and its place workplace, thus can not only make working environment
Improved, it is to avoid staff's suction toluene, the pernicious gas such as ethylbenzene, additionally it is possible to make the environmental chamber pernicious gas background concn can
Control, and then the VOC experiment background concns in environmental chamber is met standard requirement for a long time；It is by institute to be additionally, since waste gas
State exhaust extractor to be discharged, then waste gas can not be made by charcoal absorption system in cabin thus, it is possible to extend environmental chamber
With the life-span, cost of equipment maintenance is reduced.
Auto parts and components VOC method of testings of the invention are carried out based on above-mentioned auto parts and components VOC test devices, then also can
The efficiency of testing experiment is enough improved, and can also be reduced experimentation cost and be improved working environment.
Brief description of the drawings
Fig. 1 is the structural representation of the auto parts and components VOC test devices described in the present embodiment.
Fig. 2 is the nitrogen continuous feeding device described in the present embodiment, the attachment structure schematic diagram between conduit and sampler bag.
Fig. 3 is the sampler bag described in the present embodiment, the attachment structure schematic diagram between conduit and exhaust extractor.
Description of reference numerals：
1- walk-in type environmental chambers, 11- blast pipes, 12- nacelle exhaust ducts, 13- thieff hatch, 2- sampler bags, 3- gas flows
Meter, 4- vavuum pumps, 5- silicone tubes, 6- nitrogen continuous feeding devices, 61- Nitrogen source gases modules, 611, nitrogen supply source, 62- nitrogen
Gas output module, 63, conveying main pipeline, 64, nitrogen output be in charge of, 7, exhaust extractor；a、a1、a2、a3、a4、a5、a6、
A7, a8, a9- check-valves, b, b1, b2, b3, b4, b5, b6, b7, b8, b9- pressure-reducing valve, c, c1, c2, c3, c4, c5, c6- threeway
Pipe, d, d1, d2, d3, d4, d5, d6- needle-valve, e, e1, e2, e3, e4, e5, e6- ball valve, m, m1, m2, m3, m4, m5, m6- nitrogen
Output port, n, n1, n2, n3, n4, n5, n6- waste gas discharge port, p, p1, p2, p3, p4, p5, p6- waste gas discharge is in charge of, t,
T1, t2, t3, t4, t5, t6, t7, t8, t9- transfer pipeline.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1 to Fig. 3, a kind of auto parts and components VOC test devices are present embodiments provided, it includes that nitrogen is continuously supplied
It is the survey for placing sampler bag 2 inside walk-in type environmental chamber 1 to device 6, exhaust extractor 7 and walk-in type environmental chamber 1
Examination cavity volume, nitrogen continuous feeding device 6 and exhaust extractor 7 may be contained within the outside of walk-in type environmental chamber 1, and nitrogen is continuously supplied
Nitrogen output port m is provided with to device 6, exhaust extractor 7 is provided with waste gas discharge port n；The bulkhead of walk-in type environmental chamber 1 is worn
Be provided with conduit, one end of conduit is the sampler bag connection end for connecting the internal sample of walk-in type environmental chamber 1 bag, conduit it is another
End is the external connection end for connecting nitrogen output port m or waste gas discharge port n.Therefore, on the one hand, when by the external connection end of conduit
When being connected with the nitrogen output port m of nitrogen feedway 6, nitrogen continuous feeding device 6 can be by conduit to sampler bag 2
The filling of nitrogen is carried out, the nitrogen continuous feeding device 6 can avoid occurring supply because nitrogen supply (NS) is not enough in process of the test
The phenomenon of interruption, the efficiency thus, it is possible to lift testing experiment, and on the other hand it is placed directly within walk-in type ring by by sampler bag 2
The inside in border cabin 1 is supplied realizing nitrogen, then after nitrogen filling is carried out to sampler bag 2, can be without by sampler bag 2 from walk-in type
The outside of environmental chamber 1 retransfers the inside into walk-in type environmental chamber 1 to be tested, then can further improve auto parts and components
The efficiency of VOC testing experiments.And, when carrying out testing experiment using the auto parts and components VOC test devices of the present embodiment, because of nothing
Above-mentioned transfer need to be carried out to sampler bag 2 again, then can also avoid transfer sampler bag 2 during because auto parts and components scratch sampling
Bag 2 and the loss that brings, thus can also effectively reduce experimentation cost.Additionally, working as the external connection end of conduit and exhaust extractor 7
Waste gas discharge port n when being connected, can be arranged by conduit and waste gas in the waste gas produced by the inside of sampler bag 2 in process of the test
Go out device 7 to be discharged from the workplace where walk-in type environmental chamber 1 and the walk-in type environmental chamber 1, then can not only make work
Improved as environment, it is to avoid the pernicious gas such as staff's suction toluene, ethylbenzene, additionally it is possible to make having for walk-in type environmental chamber 1
Evil gas background concn is controllable, so enable the VOC in walk-in type environmental chamber 1 test background concn meet standard for a long time will
Ask；Again because waste gas is discharged by exhaust extractor 7, then waste gas can not pass through the work inside walk-in type environmental chamber 1
Property charcoal adsorption system, the service life thus, it is possible to extend walk-in type environmental chamber 1, reduce cost of equipment maintenance.
Wherein, the conduit of the present embodiment is silicone tube 5, and it can conveniently be connected, and the sampler bag 2 of the present embodiment includes
There is valve sleeve, can be used to connect silicone tube 5.Referring to Fig. 1 and Fig. 2, the nitrogen continuous feeding device 6 of the present embodiment includes nitrogen
Gas source module 61 and nitrogen output module 62, by conveying main pipeline 63 between Nitrogen source gases module 61 and nitrogen output module 62
It is connected.In the present embodiment, Nitrogen source gases module 61 includes nine nitrogen supply sources 611,611 points of nine nitrogen supply sources
It is not connected with above-mentioned conveying main pipeline 63 by transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 and forms in parallel company
Binding structure, specifically, nitrogen cylinder of the nitrogen supply source 611 for filling nitrogen, thus, is different from traditional single nitrogen cylinder supply
Mode, the present embodiment can make the supply of nitrogen be largely increased by the one side of nitrogen continuous feeding device 6, another
Aspect each nitrogen supply source 611 can be used simultaneously, it is also possible to which selectivity is used, when wherein some nitrogen supply source 611
When needing to be changed because nitrogen is not enough, other nitrogen supply sources 611 still can be with normal work such that it is able to ensure nitrogen
Continuous supply, it is to avoid because nitrogen supply (NS) deficiency there is the situation of supply discontinuity, and then can lifting test efficiency.Additionally,
(in the present embodiment, t is used as above-mentioned each transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 for above-mentioned each transfer pipeline t
Unified mark) on be designed with check-valves a and pressure-reducing valve b so that as shown in figure 1, check-valves a be provided with nine, i.e. a1, a2, a3,
A4, a5, a6, a7, a8, a9, pressure-reducing valve also are provided with nine, i.e. b1, b2, b3, b4, b5, b6, b7, b8, b9, above-mentioned check-valves a1,
A2, a3, a4, a5, a6, a7, a8, a9 are used to limit nitrogen reflux, can prevent nitrogen feed pressure from pressure nitrogen cylinder high
In low nitrogen cylinder, it is to avoid each stream of nitrogen gas is interfered with each other in output procedure, it is ensured that each transfer pipeline t1, t2, t3, t4, t5,
Nitrogen output can be carried out simultaneously in t6, t7, t8, t9, and pressure-reducing valve b1, b2, b3, b4, b5, b6, b7, b8, b9 are respectively provided with two
Nitrogen table, a nitrogen table is applied to the pressure of controlled output nitrogen, and then can adjust nitrogen output flow velocity, and another nitrogen
Table remaining nitrogen pressure suitable for monitoring nitrogen cylinder, and then can interpolate that remaining nitrogen amount in nitrogen cylinder.In the present embodiment,
Above-mentioned nitrogen output module 62 includes that six nitrogen outputs are in charge of 64, and six nitrogen outputs are in charge of 64 and are connected to conveying master
It is connected with conveying main pipeline 63 on pipeline 63 and respectively, and the output of each nitrogen is in charge of 64 pipe port and constitutes above-mentioned nitrogen
Output port m, as shown in figure 1, nitrogen output port m is altogether six, i.e. m1, m2, m3, m4, m5, m6, specifically, each nitrogen is defeated
Go out to be in charge of and connection is realized by three-way pipe c between 64 and conveying main pipeline 63, as shown in figure 1, the three-way pipe c of the present embodiment is total to
It is six, i.e. c1, c2, c3, c4, c5, c6, can realizes that each nitrogen is defeated by six three-way pipes c1, c2, c3, c4, c5, the c6
Go out to be in charge of 64 and convey the connection between main pipeline 63 and connect, certainly, in the present invention, nitrogen output is in charge of 64 and is led with conveying
Connected mode between pipeline 63 can not be limited by the present embodiment, and in other embodiments, nitrogen output is in charge of 64 with conveying
Mutual connection can also be realized between main pipeline 63 using connected modes such as welding；Additionally, above-mentioned six nitrogen output
It is in charge of 64 on the outer wall of walk-in type environmental chamber 1, and the output of each nitrogen is in charge of 64 and is equipped with needle-valve d, so that also such as Fig. 1
Shown, in the present embodiment, needle-valve d has 6, i.e. d1, d2, d3, d4, d5, d6, to realize being exported for nitrogen the tune of flow velocity
Section.
As shown in Fig. 2 the Fig. 2 shows that single sampler bag 2 is connected by silicone tube 5 with nitrogen continuous feeding device 6
The situation for connecing, arrow therein represents the outbound course of nitrogen；It is that nitrogen is quantitatively filled with sampler bag 2 during experiment, silicone tube 5
Stretching out in the part outside walk-in type environmental chamber 1 can also connect gas flowmeter 3, and gas flowmeter 3 can be used to show nitrogen i.e.
When flow velocity and setting nitrogen output flow velocity, and can be used for show nitrogen export immediately volume and setting nitrogen output volume.
It is pointed out that the valve body of the check-valves a of the present embodiment is stainless steel, and its inside nominal diameter is DN8；It is defeated
Main pipeline and transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 is sent to be stainless steel tube, and the nominal of conveying main pipeline is led to
Footpath is DN15, and the inside nominal diameter of transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 is DN8；And three-way pipe c1, c2,
C3, c4, c5, c6 are equal tee, and material is stainless steel；The valve body of needle-valve d1, d2, d3, d4, d5, d6 uses stainless steel
Material, inside nominal diameter is DN15.
In addition, referring to Fig. 1, the bulkhead of the walk-in type environmental chamber 1 of the present embodiment is provided with six will be stepped into environmental chamber 1
The thieff hatch 13 that portion is communicated with the outside, each thieff hatch 13 can wear above-mentioned silicone tube 5；And above-mentioned six nitrogen output
Nitrogen output port m1, m2, m3, m4, m5, the m6 and six thieff hatch 13 for being in charge of 64 are corresponded respectively.As shown in figure 1,
The top of walk-in type environmental chamber 1 is additionally provided with blast pipe 11.
Further, referring to Fig. 1 and Fig. 3, the auto parts and components VOC test devices of the present embodiment include exhaust extractor
7, exhaust extractor 7 is located at the outside of walk-in type environmental chamber 1, specifically, exhaust extractor 7 includes six waste gas discharges point
(in the present embodiment, waste gas discharge is in charge of can be designated generally as p), and walk-in type environmental chamber 1 is provided with cabin for pipe p1, p2, p3, p4, p5, p6
Body exhaust duct 12, the nacelle exhaust duct 12 leads to the outside of the place workplace of walk-in type environmental chamber 1, and each waste gas discharge is in charge of
P1, p2, p3, p4, p5, p6 are connected and are connected with nacelle exhaust duct 12 respectively, and the pipe port composition of p is in charge of in waste gas discharge
Waste gas discharge port n, as shown in figure 1, waste gas discharge port n has six, i.e. n1, n2, n3, n4, n5, n6, so that, when by silicon
When the external connection end of sebific duct 5 is connected with corresponding waste gas discharge port n, the waste gas in experiment produced by the inside of each sampler bag 2 can
Discharged by each waste gas of exhaust extractor 7 and be in charge of p1, p2, p3, p4, p5, p6 and discharge walk-in type environmental chamber 1 and its place
Workplace, thus, waste gas enters nacelle exhaust duct 12 by exhaust extractor 7, rather than enter walk-in type environmental chamber 1 and
(workplace includes the test site outside walk-in type environmental chamber 1 and the walk-in type environmental chamber 1 for workplace where it
Institute), then testing crew without sucking the poisonous and harmfuls such as benzene, toluene, ethylbenzene, dimethylbenzene, styrene, formaldehyde, acetaldehyde, methacrylaldehyde again
Gas, can be improved working environment, and because the waste gas discharged will not be in re-enter walk-in type environmental chamber 1
Portion, then cause that the pernicious gas background concn of walk-in type environmental chamber 1 is controllable, and VOC experiment background concns can for a long time meet standard will
Ask；After using the exhaust extractor of the present embodiment, a continuous month background concn to walk-in type environmental chamber 1 is monitored,
Result such as table 2, pernicious gas background concn is satisfied by standard limited value requirement in the cabin of walk-in type environmental chamber 1.
Background concn monitoring result in the continuous month walk-in type environmental chamber of table 2
On the other hand, because waste gas is discharged by the exhaust extractor 7, then waste gas is not by activity in cabin
Charcoal adsorption system, can extend the service life of walk-in type environmental chamber 1, reduce cost of equipment maintenance.Additionally, above-mentioned each waste gas discharge
Be in charge of p1, p2, p3, p4, p5, p6 located at walk-in type environmental chamber 1 outer wall, and each waste gas discharge be in charge of p1, p2, p3, p4,
P5, p6 are stainless steel tube, and inside nominal diameter is DN15；Each waste gas discharge is in charge of p and is equipped with ball valve e, as shown in figure 1, ball valve e
Six, i.e. e1, e2, e3, e4, e5, e6 are had accordingly, thus, it is possible to the control for realizing being opened and closed for off-gas flows；Wherein, ball
Valve e1, e2, e3, e4, e5, e6 are each attached to the outer wall of walk-in type environmental chamber 1, and its valve body material is stainless steel, and nominal is led to
Footpath is DN15.As shown in figure 3, Fig. 3 shows that single sampler bag 2 connects the structure of exhaust extractor 7 by silicone tube 5, its
In arrow represent the discharge direction of waste gas；Referring back to Fig. 3, when waste gas discharge is carried out, silicone tube 5 stretches out in walk-in type environment
Part outside cabin 1 can connect vavuum pump 4, and vavuum pump 4 can be used to extract the gas in sampler bag 2 out.
In the present embodiment, auto parts and components VOC test devices also include gas sampling device (not shown), gas
Sample devices is arranged at the outside of walk-in type environmental chamber 1, and gas sampling device can connect the external of above-mentioned silicone tube 5 by pipeline
End, so that, gas sampling device can gather the gaseous sample in sampler bag 2 by above-mentioned silicone tube 5, and can be to gaseous sample
Carry out test analysis.
It should be noted that in the present embodiment, above-mentioned nitrogen output be in charge of 64 and its nitrogen output port m quantity,
The quantity that the quantity, above-mentioned thieff hatch 13 and corresponding silicone tube 5 of p and its waste gas discharge port n are in charge of in above-mentioned waste gas discharge is all provided with
It is six, however, the quantity of the above-mentioned each part in the present invention can not be limited by the present embodiment, such as, in other embodiment
In, the quantity of these parts can be set to one or more, and in such embodiments, the annexation of each part can be with this
Similar in embodiment, here is omitted.Additionally, above-mentioned nitrogen output port m is corresponded with above-mentioned thieff hatch 13, on
State waste gas discharge port n also to be corresponded with above-mentioned thieff hatch 13, thereby, it is possible to facilitate the external connection end of silicone tube 5 defeated with nitrogen
Connection between exit port m or waste gas discharge port n.In addition, in the present embodiment, the quantity of above-mentioned nitrogen cylinder is nine, one
As each nitrogen cylinder can the supply of nitrogen 6000L, then the single of Nitrogen source gases module 61 of the present embodiment can be supplied to nitrogen 54000L, can
19 nitrogen supplies of 2000L sampler bags 2 are met simultaneously；Certainly, in the present invention, the quantity of nitrogen supply source 611 is not equally
Limited by the present embodiment, and its quantity can as needed carry out the quantity and corresponding sampler bag of the auto parts and components of testing experiment
2 quantity, volume carry out reasonable set, however, being not nitrogen supply (NS) occur to ensure the continuous supply of nitrogen to interrupt
Situation, in other embodiments, the quantity of nitrogen supply source 611 should be set at least two, and each nitrogen supply source 611 also divides
Above-mentioned parallel connection is not realized with conveying main pipeline 63.
The auto parts and components VOC test devices of the present embodiment are related to a kind of auto parts and components VOC method of testings, it include with
Lower step：
S1, the inside of walk-in type environmental chamber 1 will be placed in built with the sampler bag 2 of auto parts and components, and makes auto parts and components
Exposure or facing up of being satisfied the needs of consumers in vehicle of auto parts and components, then by the poly- second in the openend of sampler bag 2
Alkene sealing strip is sealed, then the sampler bag connection end of silicone tube 5 is connected with the upper valve sleeve of sampler bag 2；
S2, the part stretched out in silicone tube 5 outside walk-in type environmental chamber 1 connect gas flowmeter 3, and make silicone tube 5
External connection end be connected with the nitrogen output port m of nitrogen continuous feeding device 6, then pass through nitrogen continuous feeding device 6
Silicone tube 5 is filled with nitrogen to sampler bag 2；Wherein, the volume for being filled with the nitrogen of sampler bag 2 is the 30% of the volume of sampler bag 2；
S3, the connection of silicone tube 5 and gas flowmeter 3 is disconnected, and disconnect the external connection end of silicone tube 5 and above-mentioned nitrogen is exported
The connection of port m；
S4, the part stretched out in silicone tube 5 outside walk-in type environmental chamber 1 are connected with vavuum pump 4, and by silicone tube 5
External connection end is connected with the waste gas discharge port n of exhaust extractor 7, then makes exhaust extractor 7 by the nitrogen in sampler bag 2
Gas is discharged；
S5, repeat step S2-S4 tri- times, that is, realize being rinsed for three nitrogen of sampler bag 2；
S6, the part stretched out in silicone tube 5 outside walk-in type environmental chamber 1 are connected with gas flowmeter 3, and make silicon again
The external connection end of sebific duct 5 is again coupled to the nitrogen output port m of nitrogen continuous feeding device 6, nitrogen is continuously supplied dress
Put 6 pairs of sampler bags 2 and be filled with nitrogen again；Wherein, the volume for being filled with the nitrogen of sampler bag 2 is the 50% of the volume of sampler bag 2；
S7, the connection of silicone tube 5 and gas flowmeter 3 is again off, and disconnects the external connection end and above-mentioned nitrogen of silicone tube 5
The connection of output port m；
S8, the sampler bag 2 equipped with auto parts and components and filled with nitrogen is entered by setting the temperature in walk-in type environmental chamber 1
Row heating；Wherein, the temperature in walk-in type environmental chamber 1 sets 65 DEG C, and the time of heating is set as 120min；
After the completion of S9, heating, gas sampling device is connected by pipeline with the external connection end of silicone tube 5, and by this
Gas sampling device carries out sample collection and test analysis to the gas in sampler bag 2；
After S10, the gas in sampler bag 2 carry out sample collection, silicone tube 5 is stretched out in into walk-in type environmental chamber again
Part outside 1 is connected with vavuum pump 4, and by the waste gas discharge port n phases of the external connection end of silicone tube 5 and exhaust extractor 7
Connection, is then discharged the waste gas in sampler bag 2 by exhaust extractor 7 and nacelle exhaust duct 12.
The auto parts and components VOC test devices of the present embodiment can carry out VOC testing experiments to six auto parts and components simultaneously,
And carried out also according to the above method for the operation of each auto parts and components and the corresponding grade of each sampler bag 2.Wherein, above-mentioned test
Gas flowmeter 3 used in test method is used to show the instant flow velocity of nitrogen and sets nitrogen output flow velocity, and for showing
Show that nitrogen exports volume and setting nitrogen output volume immediately, quantitative control is carried out with the quantity delivered to nitrogen, and vavuum pump 4 is used
Gas in sampler bag 2 is extracted out, its speed of exhaust can be set to 60L/min.In addition, in the present embodiment, on above-mentioned nitrogen
Output port m, waste gas discharge port n and gas sampling device can pass through with the connection between the external connection end of silicone tube 5 respectively
Pluggable mode is carried out；Herein it is noted that exist control air flow direction four-way switching valve technical conditions under, Ke Yi
The external connection end of above-mentioned silicone tube 5 sets four-way switching valve, then again by the nitrogen output port m of nitrogen continuous feeding device 6, useless
Gas discharge port n and gas sampling device connect the four-way switching valve in the external connection end of silicone tube 5 respectively, it is possible thereby to pass through institute
State four-way switching valve to realize the control of air flow direction, and without carrying out above-mentioned plug again, so can more facilitate operation.
It should be appreciated that various information are described in the present invention using term " first ", " second " etc., but these information
These terms are should not necessarily be limited by, these terms are only used for being distinguished from each other open same type of information.For example, not departing from the present invention
In the case of scope, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as
" first " information.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement and deformation can also be made, these are improved and deformation is also considered as
Protection scope of the present invention.
Claims (14)
1. a kind of nitrogen continuous feeding device, it is characterised in that if including conveying main pipeline, at least two nitrogen supply sources and
Dry nitrogen output is in charge of, and each nitrogen supply source is connected with the conveying main pipeline respectively, and each nitrogen output is in charge of
It is connected with the conveying main pipeline respectively, the pipe port that the nitrogen output is in charge of constitutes nitrogen output port.
2. nitrogen continuous feeding device according to claim 1, it is characterised in that each nitrogen supply source with it is described
It is connected by transfer pipeline between conveying main pipeline, and check-valves and pressure-reducing valve is equipped with each transfer pipeline.
3. nitrogen continuous feeding device according to claim 1, it is characterised in that each nitrogen output is in charge of and is all provided with
There is the needle-valve that flow velocity is exported for adjusting nitrogen.
4. a kind of auto parts and components VOC test devices, it is characterised in that including environmental chamber, exhaust extractor and such as right
It is required that the nitrogen continuous feeding device described in 1 to 3 any one, the nitrogen continuous feeding device and the exhaust extractor are equal
The outside of the environmental chamber is arranged at, the exhaust extractor is provided with some waste gas discharge ports, the bulkhead of the environmental chamber
Be equipped with some conduits, be the test cavity volume for placing sampler bag inside the environmental chamber, one end of the conduit be for
The sampler bag connection end of JA(junction ambient) cabin internal sample bag, the other end of the conduit is for connecting the nitrogen output port
Or the external connection end of the waste gas discharge port.
5. auto parts and components VOC test devices according to claim 4, it is characterised in that the bulkhead of the environmental chamber sets
There are some thieff hatch, the conduit is arranged in the thieff hatch.
6. auto parts and components VOC test devices according to claim 5, it is characterised in that the nitrogen output port and
The waste gas discharge port may be contained within the outer wall of the environmental chamber, and a pair of the nitrogen output port and the thieff hatch 1
Should, the waste gas discharge port is also corresponded with the thieff hatch.
7. auto parts and components VOC test devices according to claim 4, it is characterised in that the exhaust extractor bag
Include the discharge of some waste gas to be in charge of, the environmental chamber is provided with nacelle exhaust duct, each waste gas discharge be in charge of respectively with the nacelle
Exhaust duct is communicated, and the pipe port that waste gas discharge is in charge of constitutes the waste gas discharge port.
8. auto parts and components VOC test devices according to claim 7, it is characterised in that each waste gas discharge point
Pipe is provided with the valve for controlling off-gas flows to be opened and closed.
9. auto parts and components VOC test devices according to claim 4, it is characterised in that also including gas sampling device,
The gas sampling device is arranged at the outside of the environmental chamber, and the gas sampling device can be by pipeline and the conduit
External connection end connection.
10. the auto parts and components VOC test sides that auto parts and components VOC test devices described in a kind of use claim 4 to 9 are carried out
Method, it is characterised in that comprise the following steps：
S1, the inside of environmental chamber will be placed in built with the sampler bag of auto parts and components, and the sampler bag is connected to conduit
Sampler bag connection end；
S2, nitrogen flushing is carried out to sampler bag：The external connection end of conduit is connected with nitrogen output port, nitrogen is continuously supplied
Device is filled with nitrogen to sampler bag by conduit, and then nitrogen output port is separated with the external connection end of conduit, then by conduit
External connection end is connected with waste gas discharge port, the nitrogen in sampler bag is discharged by exhaust extractor；
S3, nitrogen is poured again to the sampler bag after nitrogen is rinsed；
S4, the sampler bag equipped with auto parts and components and filled with nitrogen is heated by the temperature in set environment cabin；
S5, sample collection and test analysis are carried out to the gas in sampler bag by the external connection end of conduit；
S6, the external connection end of conduit is connected with waste gas discharge port, the waste gas in sampler bag is arranged by exhaust extractor
Go out.
11. auto parts and components VOC method of testings according to claim 10, it is characterised in that in step s 2, the nitrogen
The number of times of gas flushing is set to three times, and the volume of the nitrogen for being filled with sampler bag every time is the 30% of sampler bag volume.
12. auto parts and components VOC method of testings according to claim 10, it is characterised in that in step s3, be filled with and adopt
The volume of the nitrogen of sample bag is the 50% of sampler bag volume.
13. auto parts and components VOC method of testings according to claim 10, it is characterised in that in step s 4, the ring
The temperature setting in border cabin is 65 DEG C, and the time of heating is set as 120min.
14. auto parts and components VOC method of testings according to claim 10, it is characterised in that in step s 5, first by institute
The external connection end for stating conduit is connected with the gas sampling device being arranged on outside environmental chamber, then by the gas sampling device pair
Gas in sampler bag carries out sample collection and test analysis.
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| CN108195634A (en) * | 2017-12-11 | 2018-06-22 | 北京汽车研究总院有限公司 | VOC sampler bag aging methods |
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