CN203758793U - VOC (Volatile Organic Compound) gas charging and sampling system - Google Patents
VOC (Volatile Organic Compound) gas charging and sampling system Download PDFInfo
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- CN203758793U CN203758793U CN201320894961.2U CN201320894961U CN203758793U CN 203758793 U CN203758793 U CN 203758793U CN 201320894961 U CN201320894961 U CN 201320894961U CN 203758793 U CN203758793 U CN 203758793U
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- sampler bag
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- sampling
- constant temperature
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Abstract
The utility model discloses a VOC (Volatile Organic Compound) gas charging and sampling system which comprises a control module, a gas charging module, a gas capturing module and a sampling module, wherein the gas capturing module is connected with the gas charging module and the sampling module, and the control module controls the gas charging module and the sampling module to work; the gas capturing module comprises at least one sampling bag, a constant temperature box is arranged outside the sampling bag, and a gas at constant temperature fills a space between the constant temperature box and the sampling bag. The VOC gas charging and sampling system disclosed by the utility model prevents gas from being affected by temperature, so that the test accuracy is high. During washing, the sampling bag is not broken. The detection is performed automatically without manual operation.
Description
Technical field
The utility model relates to a kind of gas sampling system, relates in particular to a kind of volatile organic matter (VOC) sampling system.
Background technology
At present, a lot of products such as all types of industries, the product for civilian use are all needed to carry out volatile organic matter test, in the test items such as gas composition analysis, smell test, first need to carry out VOC gas sampling.Traditional sampling system is achieved in that sample is placed in a sampler bag, inflated with nitrogen inside; Carry out the gas volume in calculating sampling bag by gas flow rate meter; Venting, makes gas flow through sample conduit, and calculates the volume of the employing pipe of flowing through by gas flow rate.Recently test by the content in VOC in calculating sampling conduit and the content of total gas.
Above-mentioned traditional sampling system there will be following problem: 1) gas temperature influence, and air pressure is unstable; Survey gas flow rate and survey volume, not accurate enough.2) when inflation, first to wash sampler bag, at this moment always with vacuum pump inflation, detect with gas flow rate meter, inaccurate, easily burst sack.3) sampling apparatus also exists as problem 1) the middle problem of describing.4) gas temperature in sampler bag is constant not, can not control sample conduit temperature, causes that gaseous sample condensation affects testing result.5) can not automatically complete sack cleaning, blanketing gas and gas sample collection program.
Utility model content
The technical matters that the utility model mainly solves is to provide a kind of VOC and fills gas production system, and its test accuracy is high; In when washing, can not burst sampler bag, automatic inflating, sampling, without manually.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: provide a kind of VOC to fill gas production system, it comprises control device, aerating device, gas capture devices and sampling apparatus; Wherein, gas capture devices is connected with aerating device and sampling apparatus, the work of control device control aerating device and sampling apparatus; Described gas capture devices comprises at least one sampler bag, and through clean and inflation after described at least one sampler bag be arranged in a constant temperature oven.
In preferred embodiment of the utility model, described control device is logic programmable controller.
In preferred embodiment of the utility model, described aerating device comprises the first vacuum pump, is arranged at the pressure switch of this first vacuum pump, is connected the first flow controller arranging with source of the gas, and is provided with the conduit of some communicating valves.
In preferred embodiment of the utility model, described the first vacuum pump is aspiration pump; First flow controller is gas mass flow controller; Communicating valve is solenoid valve, and conduit is Teflon or metal catheter.
In preferred embodiment of the utility model, described gas capture devices comprises the first sampler bag, the second sampler bag and some sample conduit, and the first sampler bag is all connected by the described conduit that is provided with some communicating valves with aerating device with the second sampler bag; The first sampler bag, the second sampler bag after aerating device cleans, inflates are the 3rd sampler bag, the 4th sampler bag, the 3rd sampler bag, the 4th sampler bag are all connected with sampling apparatus by sample conduit, and the 3rd sampler bag and the 4th sampler bag outer setting one constant temperature oven.
In preferred embodiment of the utility model, described constant temperature oven has automatic temperature-regulator, can make the temperature inside the box keep constant temperature.
In preferred embodiment of the utility model, described sampling apparatus comprises the second vacuum pump, the 3rd vacuum pump, surge flask, some flow controllers and some filtrators, be connected the sampling pipe interface that arranges with filtrator and higher than the thermal insulation casing of sample conduit periphery, be positioned at sample conduit and close on the constant temperature thief hatch of sampling pipe interface one end, be constant temperature region from constant temperature thief hatch to insulation can.
In preferred embodiment of the utility model, described the second vacuum pump is connected between constant temperature oven, thermal insulation casing and sample conduit, and for pumping the gas of described predetermined experimental temperature, constant temperature thief hatch is made by insulation material.
In preferred embodiment of the utility model, described the 3rd sampler bag and the 4th sampler bag are connected to multiple sampling pipe interfaces of sampling apparatus by being provided with the sample conduit of communicating valve; Sampling pipe interface is finally connected to surge flask and the 3rd vacuum pump by sample conduit via many groups of filtrators connected in series and flow controller.
In preferred embodiment of the utility model, described control device control realizes automation mechanized operation, comprises reservation sampling, timing sampling, multi-channel sampling, online discharge monitoring.
The beneficial effects of the utility model are: for making sampler bag constant temperature, at a sampler bag sheathed constant temperature oven more outward, and at the sample conduit of joining with a sampler bag sheathed thermal insulation casing more outward, the logical certain gas of temperature in constant temperature oven, be drawn out of by the space between thermal insulation casing and sample conduit, avoid gas to be subject to the impact of temperature, humidity, made test accuracy high.Moreover, at the first vacuum pump, one pressure switch is set, and controls by PLC, thereby in the time of washing, can not burst sampler bag.In addition, when input nitrogen, by detecting the mode of quality, adopt flow controller to control the volume of inflation.And sampling apparatus adopts flow controller too, test result is accurate.Finally, the utility model adopts PLC to control, and automatically detects, without manually.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing, wherein:
Fig. 1 is that the VOC of the utility model one preferred embodiment fills gas production system architecture schematic diagram.
In accompanying drawing, the mark of each parts is as follows: 10, control device; 11, aerating device; 12, gas capture devices; 13, sampling apparatus; 111, the first vacuum pump; 112, pressure switch; 114, first flow controller; 115, communicating valve; 117, conduit; 121, the first sampler bag; 122, the second sampler bag; 123, the 3rd sampler bag; 124, the 4th sampler bag; 125, constant temperature oven; 126, sample conduit; 128, communicating valve; 131, the second vacuum pump; 132, the 3rd vacuum pump; 133, surge flask; 134 flow controllers; 135, filtrator; 136, sampling pipe interface; 137, thermal insulation casing, 137, constant temperature thief hatch.
Embodiment
To the technical scheme in the utility model embodiment be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, the utility model provides a kind of VOC to fill gas production system, and it comprises control device 10, aerating device 11, gas capture devices 12 and sampling apparatus 13.Wherein, gas capture devices 12 is connected with aerating device 11 and sampling apparatus 13.In the present embodiment, this control device 10 is logic programmable controller (PLC), and control device 10 is controlled the work of aerating device 11 and sampling apparatus 13.
Aerating device 11 comprises the first vacuum pump 111, is arranged at the pressure switch 112 of this first vacuum pump 111, is connected the first flow controller 114 arranging with source of the gas 113, and is provided with the conduit 117 of some communicating valves 115.In the present embodiment, source of the gas is nitrogen.The first vacuum pump 111 is aspiration pump; First flow controller 114 is gas mass flow controller; Communicating valve 115 is solenoid valve, and conduit 117 is Teflon or metal catheter.Adopt first flow controller 114 sampling flows, stability of flow accurately and avoid traditional suffered environment temperature of volumetric flow of gas meter, the measurement deviation of pressure; Automatically completing sampler bag cleans and blanketing gas.
Gas capture devices 12 comprises some sampler bags, and in the present embodiment, gas capture devices 12 comprises the first sampler bag 121, the second sampler bag 122, but in the utility model, the quantity of sampler bag is not limited to this.The first sampler bag 121 is connected by described communicating valve 115 with aerating device 10 with the second sampler bag 122.The first sampler bag 121 and the second sampler bag 122 outsides are environment temperature.Described aerating device 11 automatically completes cleaning and the blanketing gas of the first sampler bag 121, the second sampler bag 122 under the control of control device 10.Adopt first flow controller 114 sampling flows, stability of flow accurately and avoid traditional suffered environment temperature of volumetric flow of gas meter, the measurement deviation of pressure.
The first sampler bag 121 and the second sampler bag 122 after cleaning and inflating are the 3rd sampler bag 123 and the 4th sampler bag 124.The 3rd sampler bag 123 is all connected with sampling apparatus 13 by the sample conduit 126 that is provided with communicating valve 128 with the 4th sampler bag 124.The 3rd sampler bag 123 and the 4th sampler bag 124 outer setting one constant temperature ovens 125, and constant temperature oven 125 has automatic temperature-regulator, can make the temperature inside the box keep constant temperature.
Described first to fourth sampler bag 121,122,123,124 is fluoroplastic sampler bag, each sampler bag includes attaching type sealing strip, stop valve (not shown), the valve of stop valve adopts conical design, can directly directly be connected with conduit 117 or sample conduit 126.Fluoride plastic bag is high temperature resistant, and chemical stability is good, and attaching type sealing strip is convenient to the test of solid exemplar.Sampling apparatus 13 comprises the second vacuum pump 131, the 3rd vacuum pump 132, surge flask 133, some flow controllers 134 and some filtrators 135, be connected the sampling pipe interface 136 arranging with filtrator 135, be located at sample conduit 126 peripheries thermal insulation casing 137, be positioned at sample conduit 126 and close on the constant temperature thief hatch 138 of sampling pipe interface 136 one end.Wherein, flow controller 134 is gas mass flow controller, adopts gas mass flow controller sampling flow, and stability of flow accurately and avoid traditional suffered environment temperature of volumetric flow of gas meter, the measurement deviation of pressure.Moreover, be not subject to the drag effects of sample conduit 126, if traditional sampling pump sampling resistance too conference take out motionless phenomenon, VOC described in the utility model fills gas production system and there will not be this phenomenon.
The above-mentioned communicating valve 128 that is located at sample conduit 126 is solenoid valve, and sample conduit 126 is Teflon or metal catheter.Thermal insulation casing 137 is connected with constant temperature oven 125, and the air of extracting out from constant temperature oven 125 is to thermal insulation casing 137, and make sample conduit 126 inside is also temperature constant state always.The second vacuum pump 131 is connected in the space between constant temperature oven 125, thermal insulation casing 137 and sample conduit 126, for pumping the gas of described predetermined experimental temperature.Constant temperature thief hatch 138 is made by insulation material.When the second vacuum pump 131 starts, the gas of constant temperature oven 125 is by the thermal insulation casing 137 constant temperature thief hatch 138 of flowing through, ensure the gas of constant temperature oven 125 and the gas communication of constant temperature thief hatch 138, sample conduit 126 temperature in this region will approach the temperature (being experimental temperature) of constant temperature oven 125, realize sample conduit 126 temperature consistent with experimental temperature, keep constant temperature thief hatch to communicate with constant temperature oven by the mode of the circulation of bleeding, avoid the condensation of experimental gas sample, reduce experimental bias.
The 3rd sampler bag 123 and the 4th sampler bag 124 are connected to multiple thief hatchs 136 of sampling apparatus 13 by being provided with the sample conduit 126 of communicating valve 128.Thief hatch 136 is finally connected to surge flask 133 and the 3rd vacuum pump 132 by sample conduit 126 via many groups of filtrators 135 connected in series and flow controller 134.Wherein, in the present embodiment, every group of filtrator 135 connected in series and flow controller 134 are all connected to the thief hatch 136 of at least two diverse locations.Whole VOC fills gas production system and realizes the automation mechanized operations such as reservation sampling, timing sampling, multi-channel sampling, online discharge monitoring by PLC controller.In sum, compared to prior art, VOC described in the utility model fills gas production system for making sampler bag constant temperature, at a sampler bag sheathed constant temperature oven 125 more outward, and at the sample conduit of joining with a sampler bag sheathed thermal insulation casing 137 more outward, 125 gas in constant temperature oven, is drawn out of by the space between thermal insulation casing 137 and sample conduit 126, avoid gas to be subject to the impact of temperature, humidity, made test accuracy high.Moreover, at the first vacuum pump 111, a pressure switch 112 is set, and controls by PLC, thereby in the time of washing, can not burst sampler bag.In addition, when input nitrogen, by detecting the mode of quality, adopt flow controller to control the volume of inflation.And sampling apparatus adopts flow controller too, test result is accurate.Finally, automaton 10 of the present utility model adopts PLC to control, and automatically detects, and without manually, it can complete the related sack cleaning of experimentation, blanketing gas, gaseous sample capture program successively automatically to a sample; Also can carry out multiple sack cleanings, blanketing gas and gas sample collection program simultaneously.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. VOC fills a gas production system, it is characterized in that, comprises control module, inflator module, gas trapping module and sampling module; Wherein, gas trapping module is connected with inflator module and sampling module, the work of control module control inflator module and sampling module; Described gas trapping module comprises at least one sampler bag, and through clean and inflation after described at least one sampler bag be arranged in a constant temperature oven; Described inflator module comprises the first vacuum pump, is arranged at the pressure switch of this first vacuum pump, is connected the first flow controller arranging with source of the gas, and is provided with the conduit of some communicating valves; Described gas trapping module comprises the first sampler bag, the second sampler bag and some sample conduit, and the first sampler bag is all connected by the described conduit that is provided with some communicating valves with inflator module with the second sampler bag; The first sampler bag, the second sampler bag after inflator module is cleaned, inflated are the 3rd sampler bag, the 4th sampler bag, the 3rd sampler bag, the 4th sampler bag are all connected with sampling module by sample conduit, and the 3rd sampler bag and the 4th sampler bag outer setting one constant temperature oven.
2. VOC according to claim 1 fills gas production system, it is characterized in that, described control module is logic programmable controller.
3. VOC according to claim 1 fills gas production system, it is characterized in that, described the first vacuum pump is aspiration pump; First flow controller is gas mass flow controller; Communicating valve is solenoid valve, and conduit is Teflon or metal catheter.
4. VOC according to claim 1 fills gas production system, it is characterized in that, described constant temperature oven has automatic temperature-control module, can make the temperature inside the box keep constant temperature.
5. VOC according to claim 1 fills gas production system, it is characterized in that, described sampling module comprises the second vacuum pump, the 3rd vacuum pump, surge flask, some flow controllers and some filtrators, be connected the sampling pipe interface that arranges with filtrator and higher than the thermal insulation casing of sample conduit periphery, be positioned at sample conduit and close on the constant temperature thief hatch of sampling pipe interface one end, be constant temperature region from constant temperature thief hatch to insulation can.
6. VOC according to claim 5 fills gas production system, it is characterized in that, described the second vacuum pump is connected between constant temperature oven, thermal insulation casing and sample conduit, and for pumping the gas of described predetermined experimental temperature, constant temperature thief hatch is made by insulation material.
7. fill gas production system according to the VOC described in claim 1 or 5, it is characterized in that, described the 3rd sampler bag and the 4th sampler bag are connected to multiple sampling pipe interfaces of sampling module by being provided with the sample conduit of communicating valve; Sampling pipe interface is finally connected to surge flask and the 3rd vacuum pump by sample conduit via many groups of filtrators connected in series and flow controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320894961.2U CN203758793U (en) | 2013-12-31 | 2013-12-31 | VOC (Volatile Organic Compound) gas charging and sampling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320894961.2U CN203758793U (en) | 2013-12-31 | 2013-12-31 | VOC (Volatile Organic Compound) gas charging and sampling system |
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| CN203758793U true CN203758793U (en) | 2014-08-06 |
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| CN201320894961.2U Expired - Fee Related CN203758793U (en) | 2013-12-31 | 2013-12-31 | VOC (Volatile Organic Compound) gas charging and sampling system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374612A (en) * | 2014-11-18 | 2015-02-25 | 同济大学 | Constant-temperature rapid air sampling device and using method thereof |
| CN108169424A (en) * | 2017-12-25 | 2018-06-15 | 浙江巨化检测技术有限公司 | A kind of VOCs detection devices |
| 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 |
-
2013
- 2013-12-31 CN CN201320894961.2U patent/CN203758793U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374612A (en) * | 2014-11-18 | 2015-02-25 | 同济大学 | Constant-temperature rapid air sampling device and using method thereof |
| CN104374612B (en) * | 2014-11-18 | 2017-02-22 | 同济大学 | Constant-temperature rapid air sampling device and using method thereof |
| 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 |
| CN108169424A (en) * | 2017-12-25 | 2018-06-15 | 浙江巨化检测技术有限公司 | A kind of VOCs detection devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20191231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |