CN208888009U - Vacuum sampling box - Google Patents
Vacuum sampling box Download PDFInfo
- Publication number
- CN208888009U CN208888009U CN201821586885.8U CN201821586885U CN208888009U CN 208888009 U CN208888009 U CN 208888009U CN 201821586885 U CN201821586885 U CN 201821586885U CN 208888009 U CN208888009 U CN 208888009U
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- vacuum
- vacuum pump
- sampling
- sampling box
- cabinet
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- 238000005070 sampling Methods 0.000 title claims abstract description 73
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims 1
- 238000012864 cross contamination Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a vacuum sampling box, which comprises a box body; a vacuum pump installed in the case for creating a vacuum environment in the case; the sampling switch is used for controlling the starting and stopping of the vacuum pump; the sampling bag is communicated with the gas inlet through a sampling pipe, is communicated with a gas environment with preset pressure and is used for containing a gas sample; the first three-way valve is respectively communicated with an external air source and the sampling bag; and one inlet end of the second three-way valve is communicated with the outlet end of the first three-way valve, the other inlet end of the second three-way valve is communicated with the inside of the box body, and the outlet end of the second three-way valve is connected with the vacuum pump. The vacuum pump of above-mentioned vacuum sampling case is placed in the box in, can reduce the whole volume of device from this, and portable adopts the passive sampling mode of negative pressure simultaneously, avoids cross contamination to can wash in advance the sampling bag, get rid of the foreign gas in the sampling bag, with the reduction to the pollution degree of gas sample, make its concentration level that can truly reflect the sample.
Description
Technical field
The utility model relates to sample detection technical field more particularly to a kind of vacuum sampling boxes.
Background technique
Volatile organic compounds (VolatileOrganicCompounds, VOCs), refer to high vapour pressure and
The organic compound of steam easy to form under room temperature and normal pressure.VOCs is many kinds of, from a wealth of sources, including organic solvent, fuel
Such as gasoline and diesel oil, petroleum distillate, aerosol spray tank propellant, refrigerant, responsibility product, additives of pigments and other permitted
Multiplexing industry and the consumer goods also include the natural source VOCs of plant Spontaneous release.
The sample mode of atmospheric volatile organic compound usually has actively sampling and passive sampling two major classes.Actively sample
It needs to pressurize using electromagnetic pump and is filled with sample gas into sampling apparatus, there are the hidden danger such as absorption and pollution, meanwhile, this kind sampling
In device, the electromagnetic pump is generally external, not readily portable, and increases the overall volume of device；Passive sampling generally uses
The mode of negative pressure sampling maintains a certain constant-quality flow velocity by using flow controller.But in above two sample mode,
Prewashed associated components setting is not carried out to sampler bag, therefore it causes to cause most due to there are other impurities in sampler bag
Whole testing result inaccuracy, cannot really reflect the concentration level of sample.
Utility model content
In view of the foregoing drawbacks, the utility model provides a kind of vacuum sampling box, and vacuum pump is built in cabinet, thus
Device overall volume can be reduced, it is easy to carry, while using negative pressure passive sampling mode, avoid cross contamination, and can be to adopting
Sample bag carries out prerinse, excludes the foreign gas in sampler bag, can be really anti-to reduce the pollution level to gaseous sample
Reflect the concentration level of sample.
The technical solution that the utility model is proposed with regard to above-mentioned technical problem is as follows:
A kind of vacuum sampling box, including cabinet are provided, and offers air inlet and gas outlet on the cabinet；
Vacuum pump is mounted in the cabinet, for the exhaust pipe by being connected to the gas outlet by the cabinet
Interior air is discharged from gas outlet, to cause vacuum environment in the cabinet；
Sampling switch is arranged in the surface of the cabinet, and is electrically connected with the vacuum pump, for controlling the vacuum
The start and stop of pump；
Sampler bag is placed in the cabinet, and is connected to air inlet by sampling pipe, and be connected to predetermined pressure
Gaseous environment, for accommodating the gaseous sample of the gaseous environment acquisition from described with predetermined pressure；
First triple valve, with two entrances end and one outlet end, and two arrival ends be respectively communicated with external air source and
Sampler bag；
And second triple valve, with two entrances end and one outlet end；One input end of second triple valve
It is connected to the outlet end of first triple valve, another input end is connected to the box house, and outlet end connects the vacuum pump.
Preferably, the cabinet includes: main body, and the air inlet is provided with the side of the main body with gas outlet；With
And the case lid being detachably connected with the main body.
Preferably, the case lid is to offer transparent windows on transparent material or the case lid.
Preferably, the vacuum sampling box further include: be set to the flow that the case is intracorporal, is connected to the vacuum pump
Regulating valve.
Preferably, the vacuum sampling box further include: the first valve switch being connect with first triple valve, Yi Jiyu
Second valve switch of the second triple valve connection.
Preferably, the vacuum sampling box further include: outlet end and the institute of first triple valve is arranged in filter
It states between an input end of the second triple valve, for flowing out to from sampler bag, and the gas entered in vacuum pump is filtered.
Preferably, the vacuum sampling box further include: pressure gauge is set to the body surfaces of the cabinet, and with institute
Box house connection is stated, for showing the pressure value of the box house.
Preferably, the vacuum sampling box further include: cleaning switch is set on the cabinet, and with the vacuum
Pump electrical connection, for controlling the start and stop of the vacuum pump.
Preferably, the vacuum sampling box further include: power supply is set to the box house, and connects the vacuum
Pump, for powering for the vacuum pump.
Preferably, the sampling pipe is made of polytetrafluoroethylene material, diameter 2-4mm.
In the vacuum sampling box of the utility model, vacuum pump is built in cabinet, thus can reduce device overall volume,
It is easy to carry, while negative pressure passive sampling mode is used, cross contamination is avoided, and prerinse can be carried out to sampler bag, excluded
Foreign gas in sampler bag can really reflect the concentration level of sample to reduce the pollution level to gaseous sample.
Detailed description of the invention
Fig. 1 is the overall structure figure of vacuum sampling box in the utility model embodiment one；
Fig. 2 is the structural exploded view of vacuum sampling box in the utility model embodiment one；
Pneumatic diagram when Fig. 3 is vacuum sampling box sampling in the utility model embodiment one；
Fig. 4 is that vacuum sampling box carries out testing structure connection diagram when leaking program in the utility model embodiment one；
Structure connection diagram when Fig. 5 is vacuum sampling box progress pre-cleaning recipes in the utility model embodiment one.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
Embodiment one:
As shown in Figs. 1-2, a kind of vacuum sampling box for gaseous sample sampling is present embodiments provided comprising:
Cabinet offers air inlet 1 and gas outlet 2 thereon；Specifically, the cabinet includes main body 3, the air inlet 1
The side of the main body 3 is provided with gas outlet 2；And the case of (such as hinged, snapping) is detachably connected with the main body 3
Lid 4, the case lid 4 have closed inner space after connecting with main body 3；Meanwhile box house situation in order to facilitate observation of, it is described
Case lid 4 is preferably to offer transparent windows on transparent material (such as transparent plastic is made) or the case lid 4；
Mounting plate 5 is movably arranged on inside the main body 3 of the cabinet；
Vacuum pump 6 is mounted on the mounting plate 5, (such as the exhaust pipe 18 by being connected to the gas outlet 2
Shown in Fig. 3) the intracorporal air of the case is discharged from gas outlet 2, to cause vacuum environment in the cabinet；Preferably, it is
The exhaust flow rate of vacuum pump 6 when vacuumizing is controlled, be connected to the vacuum pump 6, flow velocity is additionally provided in the cabinet and adjusts model
Enclose the flow control valve 17 (as shown in Figure 3) for 1.5-2L/min；
Power supply 7 is mounted on the mounting plate 5 of the box house, connects the vacuum pump 6, for being the vacuum
6 power supply of pump；Preferably, the power supply 7 is rechargeable lithium battery, is thus convenient for carrying out sampling behaviour at any time under the environment such as field
Make, and easy to carry；
Sampling switch 8 is arranged in 4 surface of case lid of the cabinet, and is electrically connected with the vacuum pump 6, for controlling
The start and stop of the vacuum pump 6；
Support component is arranged in inside the main body 3 of the cabinet；In the present embodiment, the support component includes: support
Plate 9, and it is connected at least one stabilizer blade 10 (preferably 4) of 9 lower surface of support plate；The stabilizer blade 10 and the peace
Removably connection (such as clamping, screw/bolt connection, snapping) of loading board 5, is erected at the peace for the support plate 9 with this
5 top of loading board；
Sampler bag 11 is placed in the support plate 9 of the support component, and is connected to air inlet 1 by sampling pipe 12, into
One step passes through the gaseous environment (such as atmospheric environment) that the connection of air inlet 1 has predetermined pressure, for accommodating from described with predetermined
The gaseous sample of the gaseous environment acquisition of pressure；Preferably, the sampling pipe 12 is made of polytetrafluoroethylene material, and diameter is
2-4mm (preferably 3.175mm), to prevent from sampling process causing finally to survey due to sampling pipe 12 adsorbs gaseous sample
The excessive defect of the gas concentration deviation obtained.
In use, starting the vacuum pump 6, by the intracorporal gas of case as shown in figure 3, trigger the sampling switch 8
(shown in the dotted arrow in Fig. 3) is discharged by flow control valve 17, exhaust pipe 18 and gas outlet 2, causes vacuum, is had pre-
If gaseous sample (as described in solid arrow in Fig. 3) in the gaseous environment (such as atmospheric environment) of constant-pressure under subnormal ambient into
Enter into the intracorporal sampler bag 11 of the case and store, realize the passive acquisition of gas, to avoid in the prior art, adding by pump
It presses to and there are problems that cross contamination and absorption when being filled with sample gas in sampling apparatus；Meanwhile the vacuum pump in the present embodiment
It is small in size, it is light-weight, it is built-in in the cabinet, convenient for being integrally carried, transporting together with cabinet, it is applicable in and makees on site
Industry.
Further, such as Fig. 1, shown in 4, the vacuum sampling box further include: pressure gauge 14；All have two entrances end and
First triple valve 13 and the second triple valve 15, the first valve switch (not shown), second valve switch at one outlet end (do not show
Out), cleaning switch 16 and filter 19；
Wherein, the first valve switch is connect with first triple valve 13, for controlling in first triple valve 13 not
With the opening and closing of access；First triple valve, 13 liang of arrival ends are respectively communicated with external air source and sampler bag 11；Second valve switch
It is connect with second triple valve 15, for controlling the opening and closing of different accesses in second triple valve 15；Second threeway
One input end of valve 15 is connected to the outlet end of first triple valve 13, and another input end is connected to by the flow control valve 17
The box house, outlet end connect the vacuum pump 6；
The cleaning switch 16 is set on the case lid 4 of the cabinet, and is electrically connected with the vacuum pump 6, for controlling
The start and stop of the vacuum pump 6；The filter 19 be arranged in first triple valve 13 outlet end and second triple valve
Between 15 input end, for flowing out to from sampler bag 11, and the gas entered in vacuum pump 6 is filtered, and prevents corruption
The substance of corrosion enters in the vacuum pump 6, damages to vacuum pump 6；
The pressure gauge 14 is set to 3 surface of main body of the cabinet, and is connected to the box house, for showing
State the pressure value of box house.
In use, passing through first valve switch and closing the first triple valve 13 as shown in figure 4, close the vacuum pump 6
It is connected to the input end of the external air source, opens the outlet end of first triple valve 13 (i.e. in Fig. 4, in the first triple valve 13
The part of filled black) and the connection sampler bag 11 input end (i.e. in Fig. 4, the portion of 13 bend of the first triple valve filling
Point) formed access；Meanwhile first triple valve 13 is connected to by second valve switch the second triple valve 15 of closing and is gone out
The input end at mouthful end, open second triple valve 15 outlet end (i.e. in Fig. 4, the portion of 15 bend of the second triple valve filling
Point) be connected to by flow control valve 17 box house input end (i.e. in Fig. 4, filled black in the second triple valve 15
Part) formed access；The reading of recording manometer 14 is P1 at this time, waits the predetermined time, and after 2min, record is pressed again
The reading of power table 14 is P2, if the value of P1-P2/P1 is less than or equal to preset value (such as 0.02), then it is assumed that cabinet is air tight, then may be used
To enter next operating procedure (pre-cleaning process described as follows), the above are testing for box house to leak through journey.
It further, is to remind personnel in time note that the vacuum sampling box further includes that calculator (does not show in gas leakage
Out) and alarm (such as combined aural and visual alarm is not shown)；The calculator is mounted on the mounting plate plate 5, is separately connected institute
It states pressure gauge 14 and the alarm of the tank surface is set, for recording first triple valve 13 and the second threeway
First reading P1 of the access of valve 15 pressure gauge 14 when opening, and record predetermined time (such as 2min) is afterwards pressure gauge 14
Second reading P2, and whether the value for calculating P1-P2/P1 is less than or equal to preset value (such as 0.02), if the value of P1-P2/P1 is less than
Or being equal to preset value, then the calculator generates alarm signal, and sends it to the alarm, and the alarm generates leakage
Gas standby signal (such as sound, light) thus reminds personnel inspection device in time, prevents next step by gas leakage effect.
Completion test leakage it is above-mentioned test leak through journey after, as shown in figure 5, by first valve switch close the first triple valve 13
It is connected to the input end of the external air source, opens the outlet end of first triple valve 13 (i.e. in Fig. 5, in the first triple valve 13
The part of filled black) and the connection sampler bag 11 input end (i.e. in Fig. 5, the portion of 13 bend of the first triple valve filling
Point) formed access；Meanwhile it being closed by second valve switch and the box house is connected to by flow control valve 17
Input end, open the second triple valve 15 be connected to 13 outlet end of the first triple valve input end (i.e. in Fig. 5, the second triple valve
The part of filled black in 15) be connected to the vacuum pump 6 outlet end (i.e. in Fig. 5,15 bend of the second triple valve filling
Part) formed access, the gas for then pressing the cleaning switch 16 to start the vacuum pump 6, in the sampler bag 11
(i.e. in Fig. 5 shown in solid arrow) passes sequentially through access, the filter 19, the first triple valve 13 that first triple valve 13 is opened
The access of opening flows into the vacuum pump 6, and is discharged by the vacuum pump 6 by exhaust pipe 18, gas outlet 2, repeats above-mentioned
Process 3 times or more, the pre-cleaning process of the sampler bag 11 is completed with this, thus arranges the foreign gas in sampler bag 11 completely
It removes, reduces subsequent measurement error, guarantee the concentration level for really reflecting sample.
In conclusion realizing the passive sampling of gas in the vacuum sampling box of the application using vacuum pump, avoid intersecting dirty
Dye, at the same built in vacuum pump, it is thus easy to carry and transport, reduce the overall weight of device, is suitble to field operation；Pass through simultaneously
The setting of triple valve checks whether there is gas leakage in sampler bag, and to implementing prerinse in sampler bag, and it is dense thus to reduce sample
Spend measurement error.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of vacuum sampling box, including cabinet, and air inlet and gas outlet are offered on the cabinet；It is characterized in that, institute
State vacuum sampling box further include:
Vacuum pump is mounted in the cabinet, for the exhaust pipe by being connected to the gas outlet that the case is intracorporal
Air is discharged from gas outlet, to cause vacuum environment in the cabinet；
Sampling switch is arranged in the surface of the cabinet, and is electrically connected with the vacuum pump, for controlling the vacuum pump
Start and stop；
Sampler bag is placed in the cabinet, and is connected to air inlet by sampling pipe, and be connected to the gas with predetermined pressure
Environment, for accommodating the gaseous sample of the gaseous environment acquisition from described with predetermined pressure；
First triple valve, with two entrances end and one outlet end, and two arrival ends are respectively communicated with external air source and sampling
Bag；
And second triple valve, with two entrances end and one outlet end；One input end of second triple valve is connected to
The outlet end of first triple valve, another input end are connected to the box house, and outlet end connects the vacuum pump.
2. vacuum sampling box as described in claim 1, which is characterized in that the cabinet includes: main body, the air inlet with go out
Port is provided with the side of the main body；And the case lid being detachably connected with the main body.
3. vacuum sampling box as claimed in claim 2, which is characterized in that the case lid is to open on transparent material or the case lid
Equipped with transparent windows.
4. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: be set to described
The flow control valve that case is intracorporal, is connected to the vacuum pump.
5. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: with described first
First valve switch of triple valve connection, and the second valve switch being connect with second triple valve.
6. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: filter is set
It sets between the outlet end of first triple valve and an input end of second triple valve, for being flowed to from sampler bag
Out, and the gas into vacuum pump is filtered.
7. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: pressure gauge is set
The body surfaces of the cabinet are placed in, and are connected to the box house, for showing the pressure value of the box house.
8. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: cleaning switch,
It is set on the cabinet, and is electrically connected with the vacuum pump, for controlling the start and stop of the vacuum pump.
9. vacuum sampling box as described in claim 1, which is characterized in that the vacuum sampling box further include: power supply, setting
In the box house, and the vacuum pump is connected, for powering for the vacuum pump.
10. such as the described in any item vacuum sampling boxes of claim 1-9, which is characterized in that the sampling pipe uses polytetrafluoroethyl-ne
Alkene material is made, diameter 2-4mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018211927429 | 2018-07-26 | ||
| CN201821192742 | 2018-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208888009U true CN208888009U (en) | 2019-05-21 |
Family
ID=66514299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821586885.8U Active CN208888009U (en) | 2018-07-26 | 2018-09-28 | Vacuum sampling box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208888009U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN116202829A (en) * | 2023-03-15 | 2023-06-02 | 南通科瑞环境科技有限公司 | Automatic change and gather and use vacuum box |
-
2018
- 2018-09-28 CN CN201821586885.8U patent/CN208888009U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN116202829A (en) * | 2023-03-15 | 2023-06-02 | 南通科瑞环境科技有限公司 | Automatic change and gather and use vacuum box |
| CN116202829B (en) * | 2023-03-15 | 2023-11-10 | 南通科瑞环境科技有限公司 | Automatic change and gather and use vacuum box |
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