CN206411087U - Nitrogen continuous feeding device and auto parts and components VOC test devices - Google Patents

Abstract

The utility model provides a kind of nitrogen continuous feeding device and auto parts and components VOC test devices, the auto parts and components VOC test devices 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 outside of the environmental chamber, the exhaust extractor is provided with some waste gas discharge ports, the bulkhead of the environmental chamber is equipped with some conduits, it is the test cavity volume for placing sampler bag inside the environmental chamber, one end of the conduit is the sampler bag connection end for JA(junction ambient) cabin internal sample bag, the other end of the conduit is the external connection end for connecting the nitrogen output port or the waste gas discharge port.The test device can improve the efficiency of auto parts and components VOC testing experiments, advantageously reduce experimentation cost, and can reduce the discharge of workplace high-temperature harmful gas, can improve the working environment of staff.

Description

Nitrogen continuous feeding device and auto parts and components VOC test devices

Technical field

The utility model is related to automotive field, more particularly to a kind of nitrogen continuous feeding device and auto parts and components VOC are surveyed Trial assembly is put.

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 production Product competitiveness.

Pocket type method is the main research meanses that auto parts and components VOC is tested, and 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 It is filled with the nitrogen of prescribed volume, process of the test and sampler bag is positioned over walk-in type environmental chamber progress heated baking, heating is completed Air sample therein is gathered from sampler bag afterwards to be tested and analyzed.However, the test for auto parts and components VOC is tried at present Test and generally there are problems with：

(1) at present in auto parts and components VOC testing experiment 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 Exemplified by 2000L VOC sampler bags, auto parts and components are enclosed after 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, nitrogen 1800L need to be used by rushing single 2000L VOC and washing sampler bag；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 exemplified 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 2000L VOC sampler bags need to consume 3 bottles of nitrogen.And be generally all using single nitrogen cylinder supply at present Mode, it is impossible to realize the continuous supply of nitrogen, causes usually to need to change nitrogen cylinder, nitrogen cylinder changes time-consuming and inconvenience, often Occur nitrogen supply (NS) deficiency and the phenomenon interrupted occur.

(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 The inside that sample bag nitrogen filling needs the sampler bag that will be equipped with parts to transfer to walk-in type environmental chamber after finishing, this process Many people's careful operations are needed, test efficiency can be also reduced.

(3) it is filled with nitrogen and auto parts and components often occurs in transfer process and scrape for 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 members, 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, testing crew is seriously endangered 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, such gas of Long Term Contact, 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 can be also again introduced into walk-in type environmental chamber in the workplace discharge where environmental chamber, Walk-in type environmental chamber is polluted, 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 Experiment can not be carried out when background is beyond standard requirement；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 certain walk-in type environmental chamber of table 1

(6) at present, air cleaning unit can be arranged in test requirements document, cabin to meet walk-in type environmental chamber background concn, Background concn in cabin is reduced by the absorption of activated carbon, but the high-temp waste gas after off-test is discharged in workplace and laid equal stress on It is new to enter after walk-in type environmental chamber, activated carbon inside walk-in type environmental chamber can be made to accelerate to consume 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.

Utility model content

In order to solve the above technical problems, one of the purpose of this utility model is to provide a kind of nitrogen continuous feeding device, The nitrogen continuous feeding device can be during auto parts and components VOC testing experiments, it is to avoid showing for nitrogen supply (NS) interruption occur As being conducive to lifting test efficiency.

The nitrogen continuous feeding device that the utility model is proposed include conveying main pipeline, at least two nitrogen supply sources with And some nitrogen outputs are in charge of, each nitrogen supply source is connected with the conveying main pipeline respectively, each nitrogen output It is in charge of and is connected respectively with the conveying main pipeline, the pipe port that the nitrogen output is in charge of constitutes nitrogen output port.

Optionally, it is connected between each nitrogen supply source and the conveying main pipeline by transfer 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 utility model is to provide a kind of auto parts and components VOC tests Device, the test device can lift the efficiency of testing experiment, advantageously reduce experimentation cost, and be conducive to improving building ring Border.

The auto parts and components VOC test devices that the utility model is proposed include environmental chamber, exhaust extractor and on The nitrogen continuous feeding device stated, the nitrogen continuous feeding device and the exhaust extractor may be contained within the environmental chamber Outside, the exhaust extractor is provided with some waste gas discharge ports, and the bulkhead of the environmental chamber is equipped with some conduits, institute It is the test cavity volume for placing sampler bag to state environmental chamber inside, and one end of the conduit is for JA(junction ambient) cabin internal sample The sampler bag connection end of bag, the other end of the conduit is for connecting the nitrogen output port or the waste gas discharge port External connection 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 is in charge of including the discharge of some waste gas, and the environmental chamber is provided with nacelle exhaust duct, Each waste gas discharge is in charge of to be 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, in addition to 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.

Implement the utility model embodiment, have the advantages that：

Nitrogen continuous feeding device of the present utility model includes at least two nitrogen supply sources, and each nitrogen supply source point Be not connected with conveying main pipeline and form parallel connection structure, be in charge of by the output of each nitrogen export nitrogen afterwards, then its The mode of traditional single nitrogen cylinder supply is different from, on the one hand the supply of nitrogen can be made to be largely increased, the opposing party Face is when wherein some nitrogen supply source needs to be changed because of nitrogen deficiency, and other nitrogen supply sources still can be normal Work, so as to ensure the continuous supply of nitrogen, it is to avoid the situation of supply discontinuity occur because nitrogen supply (NS) is not enough, thus may be used The efficiency of lifting test.

Auto parts and components VOC test devices of the present utility model include nitrogen continuous feeding device, exhaust extractor with And environmental chamber, the nitrogen continuous feeding device and the exhaust extractor may be contained within the outside of the environmental chamber, described The bulkhead of environmental chamber is equipped with conduit, and the sampler bag that can be used for inside JA(junction ambient) cabin of sampler bag connection end of conduit, conduit External connection end can be used for connect the nitrogen output port, then the nitrogen continuous feeding device can be to being arranged in environmental chamber The sampler bag in portion carries out the continuous supply of nitrogen, can avoid in process of the test supply discontinuity occur because nitrogen supply (NS) is not enough Phenomenon, so as to lifting the efficiency of testing experiment, and realizes nitrogen because sampler bag can be placed directly within the inside of environmental chamber Gas is supplied, then after nitrogen filling is carried out to sampler bag, can be without sampler bag is retransferred into environmental chamber from the outside of environmental chamber Inside, so as to can further improve test efficiency.In addition, being entered using auto parts and components VOC test devices of the present utility model During row testing experiment, because that without again shifting sampler bag, then can also avoid shifting sampler bag during because of automobile zero The loss that part scratches sampler bag and brought, so that experimentation cost can also be reduced effectively.In addition, zero, automobile of the present utility model Part VOC test devices are due to including exhaust extractor, and the external connection end of conduit can also be used to connect the useless of exhaust extractor Gas discharge port, then waste gas produced by process of the test in sampler bag can by conduit and exhaust extractor from environmental chamber and Discharged in workplace where it, it is to avoid waste gas enters the workplace in environmental chamber and its place, thus can not only make Working environment is improved, it is to avoid the pernicious gas such as staff's suction toluene, ethylbenzene, additionally it is possible to carry on the back environmental chamber pernicious gas Scape concentration is controllable, and then the VOC experiment background concns in environmental chamber is met standard requirement for a long time；It is additionally, since waste gas It is to be discharged by the exhaust extractor, then waste gas can not be by charcoal absorption system in cabin, thus, it is possible to extend Environmental chamber service life, reduces cost of equipment maintenance.

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 attachment structure schematic diagram between nitrogen continuous feeding device, conduit and sampler bag described in the present embodiment.

Fig. 3 is the attachment structure schematic diagram between sampler bag, conduit and exhaust extractor described in the present embodiment.

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.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.

Referring to Fig. 1 to Fig. 3, a kind of auto parts and components VOC test devices are present embodiments provided, it includes nitrogen and continuously supplied To device 6, exhaust extractor 7 and walk-in type environmental chamber 1, the inside of walk-in type environmental chamber 1 is the survey for placing sampler bag 2 Cavity volume is tried, 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 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 Hold as 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 Carry out the filling of nitrogen, the nitrogen continuous feeding device 6 can avoid in process of the test supplying because nitrogen supply (NS) is not enough The phenomenon of interruption, the efficiency thus, it is possible to lift testing experiment, and on the other hand by the way that sampler bag 2 is placed directly within into walk-in type ring The inside in border cabin 1 realizes that nitrogen is supplied, then after nitrogen filling is carried out to sampler bag 2, can 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.Moreover, 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.In addition, working as the external connection end of conduit and exhaust extractor 7 Waste gas discharge port n when being connected, can pass through conduit in the waste gas produced by the inside of sampler bag 2 in process of the test and waste gas is arranged Go out device 7 to discharge 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 be by 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, available for connection 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 by transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 with above-mentioned conveying main pipeline 63 and forms in parallel connect 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 Each nitrogen supply source 611 of aspect can be used simultaneously, can also selectively be used, when wherein some nitrogen supply source 611 When nitrogen is not enough to be needed to be changed, other nitrogen supply sources 611 still can be with normal work, so as to ensure nitrogen Continuous supply, it is to avoid there is the situation of supply discontinuity because nitrogen supply (NS) is not enough, so can lifting test efficiency.In addition, (in the present embodiment, t is used as above-mentioned each transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 to 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 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 the high nitrogen cylinder of pressure 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, nitrogen table is applied to the pressure of control output nitrogen, and then adjustable 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 six nitrogen outputs and is in charge of 64, and six nitrogen outputs are in charge of 64 and are connected to conveying master It is connected on pipeline 63 and respectively with conveying main pipeline 63, 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 For six, i.e. c1, c2, c3, c4, c5, c6, it can realize that each nitrogen is defeated by six three-way pipes c1, c2, c3, c4, c5, the c6 Go out be in charge of 64 and conveying main pipeline 63 between connection and connect, certainly, in the utility model, nitrogen output be in charge of 64 with it is defeated Send the connected mode between main pipeline 63 can not be limited by the present embodiment, in other embodiments, nitrogen output be in charge of 64 with Between conveying main pipeline 63 connected modes such as welding can also be used to realize mutual connection；In addition, above-mentioned six nitrogen Output 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 As shown in figure 1, in the present embodiment, needle-valve d has 6, i.e. d1, d2, d3, d4, d5, d6, flowed with realizing to export for nitrogen The regulation of speed.

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 connect, arrow therein represents the outbound course of nitrogen；It is filled with during experiment for nitrogen is quantified in sampler bag 2, silicone tube 5 The part stretched out in outside walk-in type environmental chamber 1 can also connect gas flowmeter 3, and gas flowmeter 3 can be used for showing that nitrogen is When flow velocity and setting nitrogen output flow velocity, and available for display nitrogen export immediately volume and setting nitrogen output volume.

It is pointed out that the check-valves a of the present embodiment valve body is stainless steel, and its inside nominal diameter is DN8；It is defeated It is stainless steel tube to send main pipeline and transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9, and the nominal of conveying main pipeline is led to Footpath is DN15, and transfer pipeline t1, t2, t3, t4, t5, t6, t7, t8, t9 inside nominal diameter are DN8；And three-way pipe c1, c2, C3, c4, c5, c6 are equal tee, and material is stainless steel；Needle-valve d1, d2, d3, d4, d5, d6 valve body use 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 will be stepped into environmental chamber 1 provided with six 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, which is in charge of, can be designated generally as p), and walk-in type environmental chamber 1 is provided with cabin by 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 p pipe port composition 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 each inside of sampler bag 2 can P1, p2, p3, p4, p5, p6 are in charge of by the discharge of each waste gas of exhaust extractor 7 and discharge walk-in type environmental chamber 1 and its place Workplace, thus, waste gas enter 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 is poisonous and harmful without sucking benzene, toluene, ethylbenzene, dimethylbenzene, styrene, formaldehyde, acetaldehyde, methacrylaldehyde etc. again Gas, can be improved working environment, and because the waste gas of discharge will not be in re-enter walk-in type environmental chamber 1 Portion, then make it that the pernicious gas background concn of walk-in type environmental chamber 1 is controllable, and VOC experiment background concns can meet standard for a long time will Ask；After the exhaust extractor of the present embodiment, a continuous month background concn to walk-in type environmental chamber 1 is monitored, As a 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 active in cabin Charcoal adsorption system, can extend the service life of walk-in type environmental chamber 1, reduce cost of equipment maintenance.In addition, above-mentioned each waste gas discharge Be in charge of p1, p2, p3, p4, p5, p6 be 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 realize the control 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 carrying out waste gas discharge, 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 for extracting 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 p and its waste gas discharge port n quantity, above-mentioned thieff hatch 13 and corresponding silicone tube 5 is in charge of in above-mentioned waste gas discharge is all provided with For six, however, the quantity of above-mentioned each part in the utility model can not be limited by the present embodiment, such as, in other realities Apply in example, the quantity of these parts can be set to one or more, and in such embodiments, the annexation of each part can With it is similar in the present embodiment, here is omitted.In addition, a pair of above-mentioned nitrogen output port m and above-mentioned thieff hatch 13 1 Should, above-mentioned waste gas discharge port n is also corresponded with above-mentioned thieff hatch 13, thereby, it is possible to facilitate the external connection end and nitrogen of silicone tube 5 Connection between gas output port m or waste gas discharge port n.In addition, in the present embodiment, the quantity of above-mentioned nitrogen cylinder is nine It is individual, general 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, the nitrogen supply of 19 2000L sampler bags 2 can be met simultaneously；Certainly, in the utility model, nitrogen supply source 611 Quantity do not limited by the present embodiment equally, and its quantity can carry out the quantity of the auto parts and components of testing experiment as needed And the quantity of corresponding sampler bag 2, volume carry out reasonable set, however, the continuous supply to ensure nitrogen is not to occur The situation that nitrogen supply (NS) is interrupted, in other embodiments, the quantity of nitrogen supply source 611 should be set at least two, and each nitrogen Supply source 611 also realizes above-mentioned parallel connection with conveying main pipeline 63 respectively.

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 sampler bag 2 built with auto parts and components is placed in the inside of walk-in type environmental chamber 1, and makes auto parts and components Exposure or the one side that is satisfied the needs of consumers in vehicle of auto parts and components upward, 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 for stretching 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 for disconnecting silicone tube 5 and gas flowmeter 3, and disconnect external connection end and the output of above-mentioned nitrogen of silicone tube 5 Port m connection；

S4, the part for stretching 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 three nitrogen flushing for sampler bag 2；

S6, the part for stretching 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 and the nitrogen output port m of nitrogen continuous feeding device 6 are again coupled to, and 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 for being again off silicone tube 5 and gas flowmeter 3, and disconnect the external connection end and above-mentioned nitrogen of silicone tube 5 Output port m connection；

S8, by setting the temperature in walk-in type environmental chamber 1 sampler bag 2 equipped with auto parts and components and filled with nitrogen is entered 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 pass through this Gas sampling device carries out sample collection and test analysis to the gas in sampler bag 2；

S10, the gas in sampler bag 2 are carried out after sample collection, and 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 external connection end of silicone tube 5 and the waste gas discharge port n phases of 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 for the operation of each auto parts and components and corresponding each grade of sampler bag 2 also according to the above method.Wherein, above-mentioned test Used gas flowmeter 3 is used to show the instant flow velocity of nitrogen and setting nitrogen output flow velocity in test method, and for showing Show that nitrogen exports volume and setting nitrogen output volume immediately, quantitatively controlled with the quantity delivered to nitrogen, and vavuum pump 4 is used In extracting the gas in sampler bag 2 out, its speed of exhaust can be set to 60L/min.In addition, in the present embodiment, on above-mentioned nitrogen Output port m, the connection of waste gas discharge port n and gas sampling device respectively between the external connection end of silicone tube 5 can pass through 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, without carrying out above-mentioned plug again, so can more facilitate operation.

It should be appreciated that various information are described in the utility model using term " first ", " second " etc., but these Information should not necessarily be limited by these terms, and these terms are only used for same type of information being distinguished from each other out.For example, not departing from this In the case of utility model scope, " first " information can also be referred to as " second " information, similar, and " second " information can also It is referred to as " first " information.

Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of the utility model principle is not departed from, some improvement and deformation can also be made, these improve and become Shape is also considered as protection domain of the present utility model.

Claims (9)

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 respectively with the conveying main pipeline, 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 between conveying main pipeline by transfer 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, which is in charge of, to be 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 for 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 is set 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 pass through pipeline and the conduit External connection end connection.