CN104181015A - Novel automatic sampling system used in bag method - Google Patents
Novel automatic sampling system used in bag method Download PDFInfo
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- CN104181015A CN104181015A CN201410418010.7A CN201410418010A CN104181015A CN 104181015 A CN104181015 A CN 104181015A CN 201410418010 A CN201410418010 A CN 201410418010A CN 104181015 A CN104181015 A CN 104181015A
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Abstract
The invention discloses a novel automatic sampling system used in a bag method. The novel automatic sampling system comprises a sampling bin, a heating part arranged in the sampling bin, a compressed air electromagnetic valve, a vacuum pump, a vacuum valve, a nitrogen source, at least one gas charging and discharging device, at least one sampling device and a programmable logic controller (PLC). The bag method automatic sampling system can be used for evaluating and comparing volatile organic compound (VOC) data of different internal decoration products, so that the accuracy and the effectiveness of the data can be guaranteed, the error caused by manual operation can be avoided, and the efficiency of automatic sampling used in the bag method is improved.
Description
Technical field
The present invention relates to the automatic employing system of the method for testing-sack method to part volatile organic matter.
Background technology
The sampling chamber structure that sack method is used at present as shown in Figure 1, it comprises a warehouse 1, in sampling storehouse 1, be provided with constant temperature and humidity unit 2, air inlet fan 3, filtrator 4, on the top of warehouse 1, offer exhaust outlet 5 and air outlet 6, the outlet of air inlet fan 3 is connected with the outlet of filtrator 4, and the outlet of filtrator 4 is connected with air outlet 6.The sampling system using as shown in Figure 2, employing system comprises the sample sack 10 and the blank bag 20 that are arranged in sampling storehouse, on sample sack 10 and blank bag 20, be respectively arranged with two valves 11,12,21,22, valve 11 on sample sack 10 connects sampling pump 15 by Teflon pipe arrangement 13, TENAX trap tube 14, and the valve 12 on sample sack 10 connects sampling pump 18 by Teflon pipe arrangement 16, DNPH trap tube 17.Valve 21 on blank bag 20 connects sampling pump 25 by Teflon pipe arrangement 23, TENAX trap tube 24, and the valve 22 on blank bag 20 connects sampling pump 28 by Teflon pipe arrangement 26, DNPH trap tube 27.
The testing process of sack method is:
1) aging: start circulating-heating baking oven to 80 DEG C, after 8 hours (480min), stop heating (new sampler bag first the aging heat time be 72h, equitemperature drops to 40 DEG C and reopens chamber door again, in order to replace gas in case.
2) leak detection: stand-by sampler bag is placed in sampling storehouse (Fig. 1), sample is sealed in sampler bag, connects inflation, exhaust, sample lines, gas in sampler bag is evacuated with vacuum pump, observe its impermeability, air tightly in 5min can use.
3) clean: adjusting nitrogen flow rate with flowmeter is 25L/min, (2000L sack fills 600L or 1000L to be filled with its volume 30 or 50%, 100L sack fills 30L, according to Customer Standard require) high-purity nitrogen, again gas is extracted out with vacuum pump, repetitive operation 3 times, artificial about 3-4 hour consuming time.
3) inflation: to the high pure nitrogen (2000L sack fills 1000L, and 100L sack fills 50L, requires according to Customer Standard) that is filled with 50%, sampling storehouse temperature is made as to 65 DEG C, the setting test duration is 2h.
4) sampling: first extract 100mL left and right gas before sampling out, then Tenax pipe and DNPH pipe are connected on thief hatch, timer is mixed up to 15min.Open sampling pump switch and timer countdown simultaneously, start sampling.After 15min, immediately sampling pump is closed, stop sampling.2 Tenax pipes and 1 DNPH pipe, add up to sampling 30min consuming time (Fig. 2).The sample of adopting is tested respectively benzene homologues and aldehyde ketone material with TD-GC-MS and HPLC.
Sack method test both at home and abroad at present all relies on artificial sample, and artificial nitrogen flow of aerating air changes with environment temperature and storage pressure, causes flow rate fluctuation larger, thereby affects measuring accuracy; The flow range of sampling request is large (100mL/min～1000mL/min), and every Tenax pipe is different with the resistance of DNPH pipe, the more difficult stable control of accuracy error.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of novel sack method automatically to adopt system for the existing problem of automatic employing system of method of testing-sack method of existing part volatile organic matter, this sack method adopts system can tackle test and appraisal and the contrast of different interior products VOC data automatically, ensure accuracy and the validity of data, the deviation of avoiding manual operation to cause, improves the sack method efficiency of sampling automatically.
Technical matters to be solved by this invention can be achieved through the following technical solutions:
Novel sack method adopts a system automatically, comprising:
One sampling storehouse, described sampling is provided with constant temperature and humidity unit, air inlet fan, filtrator in storehouse, offers exhaust outlet and air outlet on the wall of warehouse, and the outlet of air inlet fan is connected with the outlet of filtrator, and the outlet of filtrator 4 is connected with air outlet; It is characterized in that, also comprise:
Be arranged on the heater block in described sampling storehouse;
One compressed air electromagnetic valve;
One vacuum pump;
One vacuum valve, described vacuum valve is connected with described vacuum pump and is linked with described vacuum pump;
One nitrogen source of the gas;
At least one exhaust apparatus that fills; The described exhaust apparatus that fills comprises a by-pass valve control, an air inlet electromagnetic valve, an exhaust solenoid valve, one end of described by-pass valve control is provided with a pipe adapter so that sampler bag connects, and the other end of this by-pass valve control is connected with one end of one end of described air inlet electromagnetic valve and exhaust solenoid valve; The input end of vacuum pump and one end of described compressed air electromagnetic valve described in another termination of described exhaust solenoid valve, another termination pressurized air of described compressed air electromagnetic valve; Another termination nitrogen source of the gas of described air inlet electromagnetic valve;
At least one sampling apparatus, described sampling apparatus comprises volumetric flow of gas meter, gas flow control flowmeter, some FESTO solenoid valves, a pair of Tenax pipe, a pair of DNPH sampling pipe and vacuum diaphragm pump, a pair of Tenax pipe and a pair of DNPH sampling pipe are arranged in parallel, and the two ends at a pair of Tenax pipe and a pair of DNPH sampling pipe are connected in series respectively a FESTO solenoid valve, a pair of Tenax pipe is all connected with one end of described gas flow control flowmeter with four FESTO solenoid valves of a pair of DNPH sampling pipe one end, the other end of described gas flow control flowmeter is connected with one end of described volumetric flow of gas meter, the other end of described volumetric flow of gas meter is provided with pipe adapter so that the thief hatch of sampler bag connects, a pair of Tenax pipe is all connected with vacuum diaphragm pump with four FESTO solenoid valves of a pair of DNPH sampling pipe other end,
PLC controller, described PLC controller and described constant temperature and humidity unit, air inlet fan, heater block, compressed air electromagnetic valve, vacuum pump, vacuum valve, air inlet electromagnetic valve, exhaust solenoid valve, volumetric flow of gas meter, gas flow control flowmeter, some FESTO solenoid valves and vacuum diaphragm pump control linkage.
In a preferred embodiment of the invention, described by-pass valve control is arranged in described sampling storehouse, and its other end is connected to outside sampling storehouse and is connected with one end of described air inlet electromagnetic valve and one end of exhaust solenoid valve by pipeline.
Owing to having adopted technique scheme, compared with the automatic employing system of the present invention and existing sack method, tool has the following advantages:
1) the present invention arranges heating element in sampling in storehouse, and adopts the PLC controller control (automatic heating, temperature reaches automatic heat preserving after desired value) need not personnel control's operation, the invalid long stand-by period of saving personnel.
2) the present invention has realized Automatic Control aging, the four-stage of hunting leak, clean, sample.
3) the present invention by arranging volumetric flow of gas meter, gas flow control flowmeter in sampling apparatus, by test nitrogen gas volume and the method to flow control, realize big bag to 3 2000L and the pouch of 3 100L and inflated sampling simultaneously, improve sampling efficiency, sampling precision and stability and homogeneity are guaranteed, the deviation of avoiding personnel to operate, meets client's test request, for sack method foaming VOC full-automatic testing sampling system is initiated.
4) in the present invention, sampler bag automatic feeding pattern adopts respectively air inlet electromagnetic valve, compressed air electromagnetic valve and vent valve control open and stop, and has realized the automatic control in air feed and deflation course.Before venting, first automatically close air inlet electromagnetic valve, the exhaust of finding time of rear startup vacuum pump, is equipped with vacuum meter on pipeline, the vacuum values that is extracted into prior setting stops automatically, closes compression air supply air line solenoid valve and valve simultaneously, pregassing formula can guarantee to detect the degree of purity of gas.
5) in sampling apparatus, adopt FESTO solenoid valve (VZWD-L-M22C-M-G14-20-V-1P) and vacuum diaphragm pump (8R11101011048) for controlling the synchronized sampling in sampling pipe (100ml/min-1000ml/min) flow range, reduce installation space and estimated cost, guaranteed reliability and the comparability of image data.
Brief description of the drawings
Fig. 1 is the structure diagram in existing sampling storehouse.
Fig. 2 is the structure diagram of existing sampling apparatus.
Fig. 3 fills exhauster structure schematic diagram in sack method of the present invention employing system automatically.
Fig. 4 is the sampling apparatus structural representation in sack method of the present invention employing system automatically.
Fig. 5 is that sack method of the present invention adopts system aging schematic flow sheet automatically.
Fig. 6 is sack method of the present invention employing system automatically leak detection schematic flow sheet.
Fig. 7 is that sack method of the present invention adopts system cleaning process schematic diagram automatically.
Fig. 8 is sack method of the present invention employing system automatically leak detection sampling schematic flow sheet.
Embodiment
Referring to Fig. 3 and Fig. 4, the novel sack method providing in figure adopts system automatically, comprise a sampling storehouse 100, sampling is provided with constant temperature and humidity unit, air inlet fan, filtrator in storehouse 100, on the wall of warehouse, offer exhaust outlet and air outlet, the outlet of air inlet fan is connected with the outlet of filtrator, and the outlet of filtrator 4 is connected (above not shown, can referring to Fig. 1) with air outlet; Heater block (not shown) in sampling storehouse 100.Heater block by the control of PLC controller, is realized automatic heating, and temperature reaches automatic heat preserving after desired value, need not personnel control's operation, and the invalid long stand-by period of saving personnel.
Novel sack method employing system automatically this comprise compressed air electromagnetic valve 200, vacuum pump 300, vacuum valve 400, the nitrogen source of the gas that is made up of multiple nitrogen cylinders 510 500, three groups fill exhaust apparatus, three groups of sampling apparatuses and a PLC controller.
Every group is filled exhaust apparatus and comprises a by-pass valve control 610, an air inlet electromagnetic valve 620, an exhaust solenoid valve 630, by-pass valve control 610 is arranged in sampling storehouse 100, its one end is provided with a pipe adapter so that sampler bag connects, and the other end is connected to outside sampling storehouse 100 and is connected with one end of air inlet electromagnetic valve 620 and one end of exhaust solenoid valve 630 by pipeline; The input end of another termination vacuum pump 300 of exhaust solenoid valve 630 and one end of compressed air electromagnetic valve 200, another termination pressurized air of compressed air electromagnetic valve 200; Another termination nitrogen source of the gas 500 of air inlet electromagnetic valve; Vacuum valve 400 is connected with the output terminal of vacuum pump 300 and is linked with vacuum pump 300.
Referring to Fig. 2, every group of sampling apparatus comprises volumetric flow of gas meter 710,720,8 FESTO solenoid valves of gas flow control flowmeter 731,732,733,734,735,736,737,738, a pair of Tenax pipe 741,742, a pair of DNPH sampling pipe 751,752 and vacuum diaphragm pump 760.
A pair of Tenax pipe 741, 742 and a pair of DNPH sampling pipe 751, 752 are arranged in parallel, and at a pair of Tenax pipe 751, 752 and a pair of DNPH sampling pipe 751, 752 two ends are connected in series respectively a FESTO solenoid valve 731, 732, 733, 734, 735, 736, 737, 738, a pair of Tenax pipe 751, 752 and a pair of DNPH sampling pipe 751, four FESTO solenoid valves 731 of 752 one end, 732, 733, 734 are all connected with one end of gas flow control flowmeter 720, the other end of gas flow control flowmeter 720 is connected with one end of volumetric flow of gas meter 710, the other end of volumetric flow of gas meter 710 is provided with pipe adapter so that the thief hatch of sampler bag connects, a pair of Tenax pipe 751,752 is all connected with vacuum diaphragm pump 760 with four FESTO solenoid valves 735,736,737,738 of a pair of DNPH sampling pipe 751,752 other ends,
PLC controller and constant temperature and humidity unit, air inlet fan, heater block, compressed air electromagnetic valve 200, vacuum pump 300, vacuum valve 400, air inlet electromagnetic valve 620, exhaust solenoid valve 630, volumetric flow of gas meter 710, gas flow control flowmeter 720,8 FESTO solenoid valves 731,732,733,734,735,736,737,738 and vacuum diaphragm pump 760 control linkages.
Referring to Fig. 5, sack method of the present invention adopts system aging process to be automatically: need aging sampler bag put into sampling storehouse and its blow vent is connected by flexible pipe with the pipe adapter on by-pass valve control, and open by-pass valve control.Then select aging mode and selection to need the number of aging sampler bag present position by the operation interface on PLC controller, after choosing, press aging start button, aging program starts, and PLC controller, by the heating element circulating-heating sampling storehouse to 80 DEG C in sampling storehouse, stops heating after 8 hours, when equitemperature drops to 40 DEG C, open door, each state playback, ageing process finishes.If sampler bag is aging qualified, enter leak detection program.
Referring to Fig. 6, aging qualified after, the operation interface by PLC controller is selected leak detection pattern and is selected the number of the sampler bag present position that needs leak detection, after choosing, presses leak detection start button.PLC controller detects compressed air electromagnetic valve, whether air inlet electromagnetic valve closes, if if close and now without equipment and security alarm, PLC controller unlatching vacuum pump is opened exhaust solenoid valve simultaneously and is bled, the timing one of bleeding arrives, detect vacuum tightness and judge whether to reach standard, as vacuum tightness does not reach standard, judge that this sampler bag is defective.If vacuum tightness reaches standard, sampler bag leak detection is qualified, each state playback, and leak detection process finishes.If sampler bag leak detection is qualified, enter cleaning procedure.
Participate in Fig. 7, after sampler bag cleaning is qualified, select cleaning model and selection to need the number of the sampler bag present position of cleaning by the operation interface on PLC controller, after choosing, press cleaning start button.PLC controller detects exhaust solenoid valve and whether compressed air electromagnetic valve closes, if if close and now without equipment and security alarm, detect sampler bag pressure and whether be greater than 2bar, if be not greater than 2bar, report to the police and return, if be greater than 2bar, PLC controller is opened air inlet electromagnetic valve and be filled with nitrogen in sampler bag, inflationtime one arrives, PLC controller cuts out air inlet electromagnetic valve and opens exhaust solenoid valve and exit, deflation time one arrives, PLC controller opens air inlet electromagnetic valve and cuts out exhaust solenoid valve and again inflate, if inflation times is greater than 3 times, cleaning procedure finishes, each state playback, preparation is sampled.If inflation times is less than 3 times, clean.
Referring to Fig. 8, after sampler bag cleans and finishes, take out sampler bag, sample is put into sampler bag sealing, then put in the lump sampling storehouse the thief hatch of sampler bag is connected with volumetric flow of gas meter together with blank sampler bag, blow vent is connected by flexible pipe with the pipe adapter on by-pass valve control and opens by-pass valve control.Select sampling pattern and the number of selecting the sampler bag present position that needs sampling by the operation interface on PLC controller, after choosing, by down-sampling start button.PLC controller starts the heating element of sampling in storehouse sampling storehouse is heated to 65 DEG C and be incubated 2 hours, close air inlet electromagnetic valve simultaneously, compressed air electromagnetic valve, exhaust solenoid valve, if now without equipment and security alarm, PLC controller starts vacuum diaphragm pump and starts the FESTO solenoid valve at a pair of Tenax pipe two ends simultaneously, a pair of Tenax pipe is sampled, in Tenax sampling pipe sampling process, PLC controller control gas flow control flowmeter switches Tenax pipe sampling flow, after the sampling of Tenax sampling pipe finishes, PLC controller cuts out the FESTO solenoid valve at a pair of Tenax pipe two ends and opens the FESTO solenoid valve at a pair of DNPH sampling pipe two ends, a pair of DNPH sampling pipe is sampled, in DNPH sampling pipe sampling process, PLC controller control gas flow control flowmeter switches DNPH pipe sampling flow, after the sampling of DNPH sampling pipe finishes.PLC controller starts compressed air electromagnetic valve, exhaust solenoid valve, in sampler bag, is filled with pure pressurized air, and the gas flow of PLC controller control simultaneously control flowmeter switching pressurized air flow is until sampled.
Sack method of the present invention adopts system and Pan Asia sack method to adopt result to compare automatically, proves that sack method of the present invention employing system is automatically completely reliably.Concrete data are as follows:
Sack method of the present invention adopts system and Pan Asia sack method automatically, and reliability and the comparability comparison result of image data gather in table 1 for the first time
Table 1
Sack method of the present invention adopts system and Pan Asia sack method automatically, and reliability and the comparability comparison result of image data gather in table 2 for the second time
Table 2
Sack method of the present invention adopts system and Pan Asia sack method automatically, and reliability and the comparability comparison result of image data gather in table 3 for the third time
Table 3
Claims (2)
1. novel sack method adopts a system automatically, comprising:
One sampling storehouse, described sampling is provided with constant temperature and humidity unit, air inlet fan, filtrator in storehouse, offers exhaust outlet and air outlet on the wall of warehouse, and the outlet of air inlet fan is connected with the outlet of filtrator, and the outlet of filtrator 4 is connected with air outlet; It is characterized in that, also comprise:
Be arranged on the heater block in described sampling storehouse;
One compressed air electromagnetic valve;
One vacuum pump;
One vacuum valve, described vacuum valve is connected with described vacuum pump and is linked with described vacuum pump;
One nitrogen source of the gas;
At least one exhaust apparatus that fills; The described exhaust apparatus that fills comprises a by-pass valve control, an air inlet electromagnetic valve, an exhaust solenoid valve, one end of described by-pass valve control is provided with a pipe adapter so that sampler bag connects, and the other end of this by-pass valve control is connected with one end of one end of described air inlet electromagnetic valve and exhaust solenoid valve; The input end of vacuum pump and one end of described compressed air electromagnetic valve described in another termination of described exhaust solenoid valve, another termination pressurized air of described compressed air electromagnetic valve; Another termination nitrogen source of the gas of described air inlet electromagnetic valve;
At least one sampling apparatus, described sampling apparatus comprises volumetric flow of gas meter, gas flow control flowmeter, some FESTO solenoid valves, a pair of Tenax pipe, a pair of DNPH sampling pipe and vacuum diaphragm pump, a pair of Tenax pipe and a pair of DNPH sampling pipe are arranged in parallel, and the two ends at a pair of Tenax pipe and a pair of DNPH sampling pipe are connected in series respectively a FESTO solenoid valve, a pair of Tenax pipe is all connected with one end of described gas flow control flowmeter with four FESTO solenoid valves of a pair of DNPH sampling pipe one end, the other end of described gas flow control flowmeter is connected with one end of described volumetric flow of gas meter, the other end of described volumetric flow of gas meter is provided with pipe adapter so that the thief hatch of sampler bag connects, a pair of Tenax pipe is all connected with vacuum diaphragm pump with four FESTO solenoid valves of a pair of DNPH sampling pipe other end,
PLC controller, described PLC controller and described constant temperature and humidity unit, air inlet fan, heater block, compressed air electromagnetic valve, vacuum pump, vacuum valve, air inlet electromagnetic valve, exhaust solenoid valve, volumetric flow of gas meter, gas flow control flowmeter, some FESTO solenoid valves and vacuum diaphragm pump control linkage.
2. novel sack method as claimed in claim 1 adopts system automatically, it is characterized in that, described by-pass valve control is arranged in described sampling storehouse, and its other end is connected to outside sampling storehouse and is connected with one end of described air inlet electromagnetic valve and one end of exhaust solenoid valve by pipeline.
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| CN106706855A (en) * | 2016-12-30 | 2017-05-24 | 广州汽车集团股份有限公司 | Nitrogen continuous supply device, automobile part VOC testing device and testing method |
| CN107796918A (en) * | 2017-10-13 | 2018-03-13 | 通标标准技术服务有限公司 | Automotive interior material VOC detection means |
| CN108051285A (en) * | 2017-12-15 | 2018-05-18 | 宁波环测实验器材有限公司 | A kind of sack method VOC pretreating devices and its application method |
| 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 |
| CN108344820A (en) * | 2018-03-07 | 2018-07-31 | 苏州艾驰博特检测科技有限公司 | A kind of detection method of down toy organic volatile |
| CN109500025A (en) * | 2018-10-16 | 2019-03-22 | 武汉聚合信环保科技有限公司 | A kind of automatic tank instrument and sample can cleaning method clearly |
| CN110146347A (en) * | 2019-06-05 | 2019-08-20 | 北京八方世纪科技有限公司 | A kind of Portable Automatic sampling and cleaning device |
| CN111505137A (en) * | 2020-04-23 | 2020-08-07 | 一汽奔腾轿车有限公司 | Method for testing harmful volatile matters of interior trim assembly of passenger car |
| CN111505136A (en) * | 2020-04-23 | 2020-08-07 | 一汽奔腾轿车有限公司 | Method for testing harmful volatile matters of non-metallic materials of passenger vehicle |
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