CN205449580U - Adsorb sampling device - Google Patents
Adsorb sampling device Download PDFInfo
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- CN205449580U CN205449580U CN201521081911.8U CN201521081911U CN205449580U CN 205449580 U CN205449580 U CN 205449580U CN 201521081911 U CN201521081911 U CN 201521081911U CN 205449580 U CN205449580 U CN 205449580U
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Abstract
The utility model discloses an adsorb sampling device, include: host system, dehumidifying module, temperature control module, flow rate control module, sampling pipe, host system connects dehumidifying module, temperature control module and flow rate control module respectively for control each module work, dehumidifying module for the filtering excessive moisture in the sampling gas of sampling pipe of flowing through, temperature control module for the control flow makes it keep the stationary temperature through the gaseous temperature of sampling of sampling pipe, the flow rate control module for the control flow makes it keep the invariable velocity of flow through the gaseous velocity of flow of sampling of sampling pipe, the sampling pipe for under stationary temperature and velocity of flow condition, the quilt that adsorbs in the sampling gas detects the material, wherein, the sampling gas flow is inclosed through the gas circuit of sampling pipe. It goes on under invariable, unified condition to adsorb sampling process to get rid of humidity and temperature and to the interference of adsorption rate, guaranteed the stability and the accuracy of adsorbing the sampling result.
Description
Technical field
This utility model relates to field of gas detection, particularly to a kind of adsorbing and sampling device.
Background technology
Developing rapidly of basic industries, while bringing great economic benefit, has also increased the weight of the burden of environment.Now, problem of environmental pollution is taken seriously the most day by day.
The instrument that detection atmospheric pollution, household are polluted has a lot.Most widely used general, detection confidence the highest no more than gas chromatograph.Before detecting, it is necessary first to carry out the adsorption sampling of environmental sample, gas chromatograph is utilized to carry out resolved detection afterwards, here it is conventional " absorption analysis mode ", i.e. adsorption tube sampling-thermal desorption/gas chromatography-mass spectrography.
Pollutant are under different temperatures, humidity and gas-pressure ring border, and the efficiency of absorption is different.Which results in when different time, different location measure, measured value and actual value there may be the biggest difference, twice detection carried out in winter and summer the most respectively, only may produce very big difference because temperature is different, this can affect testing result, have a significant impact particularly with the degree of accuracy having PPB (PartPerBillion, part per billion) level testing requirement.Existing adsorption sampling method is relatively rough, for external environment consider little.
Utility model content
In order to solve the problems referred to above, this utility model provides a kind of adsorbing and sampling device, including: main control module, dehumidification module, temperature control modules, flow speed control module, sampling tube；
Described main control module connects described dehumidification module, described temperature control modules and described flow speed control module respectively, is used for controlling the work of each module；
Described dehumidification module, for filtering the excessive moisture in the sample gas flowing through described sampling tube；
Described temperature control modules, for controlling to flow through the temperature of the sample gas of described sampling tube so that it is keep stationary temperature；
Described flow speed control module, for controlling to flow through the flow velocity of the sample gas of described sampling tube so that it is keep constant flow velocity；
Described sampling tube, under sample gas is in stationary temperature and flow conditions, adsorbs the tested substance in described sample gas；Wherein, sample gas flows through the gas circuit of described sampling tube is airtight.
Wherein, described dehumidification module uses drying tube, and described temperature control modules uses temperature control box, and described flow speed control module uses air pump；Described sampling tube is placed in described temperature control box, and described temperature control box includes heater block, refrigeration part and temperature sensor；
One end of described drying tube is placed in sample gas, and the other end is connected with the air inlet of described sampling tube；The gas outlet of described sampling tube connects described air pump；When described air pump works, sample gas flows through described drying tube, described sampling tube and described air pump successively.
Wherein, described device also includes flow monitoring module；
Described flow monitoring module is connected with described main control module, flows through the flow value of sample gas of described sampling tube for statistics, when flow required by satisfied sampling, notifies described main control module, and is quit work by air pump described in described master control module controls.
Wherein, described device also includes air pressure sensing module；
Described air pressure sensing module is connected with described main control module, and for measuring the atmospheric pressure value of external environment, and atmospheric pressure value measurement obtained is stored in described main control module；
Described flow monitoring module utilizes the atmospheric pressure value of storage in described main control module to compensate the flow value of sample gas, gets rid of the air pressure interference to sampling flow.
Wherein, described sampling tube, described temperature control box and described main control module are as a Whole-dismountable；
After dismounting, described sampling tube is connected in gas chromatogram gas circuit, and temperature control box described in described master control module controls is warming up to design temperature, coordinates described gas chromatogram gas circuit to complete absorption and resolves.
This utility model embodiment provides the benefit that: this utility model flows through temperature and the flow velocity of the sample gas of sampling tube by control, filter the excessive moisture in sample gas, adsorption sampling process is made to carry out under conditions of constant, unified, eliminate the interference to adsorption rate of humidity, temperature and flow velocity, ensure that stability and the accuracy of adsorption sampling result, and then ensure the concordance of adsorption sampling effect.In a further preferred embodiment, by arranging the flow required by the detection sampling of flow monitoring module, it is further ensured that the reliability of adsorption sampling result；Measure by arranging air pressure sensing module and record ambient air pressure, providing compensation basis for sampling flow, getting rid of the air pressure interference to sampling flow；And by sampling tube, temperature control box and main control module are designed to Whole-dismountable, in that context it may be convenient to the sampling tube after adsorption sampling is connected in gas chromatograph, and sampling tube has been heated thermal desorption process, coordinate gas chromatograph to complete to resolve.Therefore, the adsorbing and sampling device that this utility model provides, have that design is simple, stable performance, with low cost, absorption resolves the advantage that same effect is good.
Accompanying drawing explanation
The system structure schematic diagram of a kind of adsorbing and sampling device that Fig. 1 provides for this utility model embodiment；
The system structure schematic diagram of the another kind of adsorbing and sampling device that Fig. 2 provides for this utility model embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model embodiment is described in further detail.
The system structure schematic diagram of a kind of adsorbing and sampling device that Fig. 1 provides for this utility model embodiment.As it is shown in figure 1, the adsorbing and sampling device that this utility model embodiment provides includes: main control module 110, dehumidification module 120, temperature control modules 130, flow speed control module 140, sampling tube 150.
Dehumidification module 120 filters the excessive moisture in the sample gas flowing through sampling tube 150, it is to avoid the excessive negative effect to adsorption efficiency of humidity, gets rid of the humidity interference to adsorption rate.
Temperature control modules 130 controls to flow through the temperature of the sample gas of sampling tube 150 so that it is keep stationary temperature, gets rid of the temperature interference to adsorption rate.
Flow speed control module 140 flows through sampling tube 150 for sample gas and provides power, and controls to flow through the flow velocity of the sample gas of sampling tube 150 so that it is keep constant flow velocity.
Main control module divides 110 Lian Jie dehumidification module 120, temperature control modules 130 and flow speed control module 140, for controlling the work of each module, such as main control module 110 can control dehumidification module 120, temperature control modules 130 and flow speed control module 140 and starts or quit work, and can set temperature and the flow velocity etc. of the sample gas flowing through sampling tube 150.
Sampling tube 150, under stationary temperature and flow conditions, the tested substance in adsorption sampling gas, it is airtight that sample gas flows through the gas circuit of sampling tube.Wherein, detected material can be the volatile organic matter etc. of the pollutant in surrounding air or indoor.
When carrying out adsorption sampling, if the flow of sample gas is very few, then sampling tube 150 may adsorb insufficient；If the flow of sample gas is too much, again may be beyond the absorbability of sampling tube 150 itself, this all can affect the accuracy of measurement result.And in the relevant criterion of absorption analytic method; generally also sampling flow is carried out detailed regulation; such as just specify in " the mensuration adsorption tube sampling-thermal desorption/gas chromatography-mass spectrography of People's Republic of China's state environment protecting standard HJ64-2013 surrounding air volatile organic matter ": sampling flow 10-200ml/min; sampling volume 2L; when relative humidity is more than 90%; should reduce sampling volume, but minimum be no less than 300ml.Therefore.Preferably, the adsorbing and sampling device that this utility model embodiment provides also includes flow monitoring module 160.Flow monitoring module 160 is connected with main control module 110, for the flow value of the sample gas of the sampled pipe of statistic fluid 150.When flow monitoring module 160 detects that the flow value of detected gas has reached the flow required by sampling, notifying main control module 110, main control module 110 coutroi velocity control module 140 again stops providing power, and the work of adsorption sampling stops.
In addition to humidity and temperature can affect adsorption rate, the air pressure of external environment also can affect adsorption rate, and when ambient air pressure changes greatly, air pressure can affect the flow of sample gas equally.Such as in the highlands that air pressure is relatively low, air can ratio leaner, the flow being at this moment necessary for improving accordingly sample gas could meet the requirement of adsorption sampling.Therefore.As further preferred version, the adsorbing and sampling device that this utility model embodiment provides also includes air pressure sensing module 170.Air pressure sensing module 170 is connected with main control module 110, and for measuring the atmospheric pressure value of external environment, and atmospheric pressure value measurement obtained is stored in main control module 110.When ambient air pressure changes greatly, flow monitoring module 160 can utilize the atmospheric pressure value of storage in main control module 110 to compensate the flow value of sample gas, such as when air pressure is relatively low, the corresponding flow improving sample gas, this eliminates the air pressure interference to sampling flow.
The system structure schematic diagram of the another kind of adsorbing and sampling device that Fig. 2 provides for this utility model embodiment.As in figure 2 it is shown, in the specific embodiment that this utility model provides, dehumidification module 120 uses drying tube 220, temperature control modules 130 to use temperature control box 230, flow speed control module 140 to use air pump 240.
When carrying out adsorption sampling, sampling tube 250 is placed in temperature control box 230, and one end of drying tube 220 is placed in sample gas, and the other end is connected with the air inlet of sampling tube 250；The gas outlet of sampling tube 250 connects air pump 240；Sampling tube 250 and drying tube 220, two of air pump 240 to be connected end be airtight, and when air pump 240 works, sample gas flows through drying tube 220, sampling tube 250 and air pump 240 successively, and this gas circuit is airtight.
Excessive moisture can be filtered, it is to avoid the humidity excessive impact on sample adsorption rate when sample gas flows through drying tube 220.Temperature control box 230 includes temperature sensor 231, heater block 232, refrigeration part 233.The temperature in temperature control box 230 is monitored in temperature sensor 231, when the temperature that the temperature in temperature control box 230 sets less than main control module 210, opens heater block 232, makes the temperature of 230 in temperature control box increase；When the temperature that the temperature in temperature control box 230 sets higher than main control module 210, open refrigeration part 233, make the temperature of 230 in temperature control box decline, make the sample gas in sampling tube 250 be in the temperature that main control module 210 sets all the time, get rid of the different impact on sample adsorption rate of temperature.Main control module 210 can control sample gas by the rotating speed of control air pump 240 and flow through sampling tube 250 with flow velocity appropriate, uniform.
In a preferred approach, the flow value of the sample gas of the sampled pipe of flow monitoring module 260 statistic fluid 250.When flow monitoring module 260 detects that the flow value of detected gas has reached the flow required by sampling, notifying main control module 210, main control module 210 controls air pump 240 again and quits work.Air pressure sensing module 270 measures the atmospheric pressure value of external environment, and atmospheric pressure value measurement obtained is stored in main control module 210.When ambient air pressure changes greatly, flow monitoring module 260 can utilize the atmospheric pressure value of storage in main control module 210 to compensate the flow value of sample gas, gets rid of the air pressure interference to sampling flow.
In a preferred embodiment of the present utility model, sampling tube 250, temperature control box 230 and main control module 210 are as a Whole-dismountable, and dotted portion the most as shown in Figure 2 is detachable.The sample obtained through adsorption sampling process needs to utilize gas chromatograph to resolve, it is connectable to gas chromatograph after dotted portion unloads in Fig. 2, sampling tube 250 accesses in gas chromatogram gas circuit, control temperature control box 230 by main control module 210 to heat, complete thermal desorption process, gas chromatograph can also obtain the atmospheric pressure value of the external environment of storage in main control module 210, utilize this atmospheric pressure value that absorption analysis result is compensated, get rid of the ambient air pressure interference to absorption analysis result, thus obtain exact value.Sampling tube 250, temperature control box 230 and main control module 210 complete to resolve work as the design convenient cooperation gas chromatogram gas circuit of a Whole-dismountable.
In sum, the adsorbing and sampling device that this utility model provides, compared with prior art, have the advantages that
1, the adsorbing and sampling device that this utility model provides, temperature and the flow velocity of the sample gas of sampling tube is flowed through by control, filter the excessive moisture in sample gas, adsorption sampling process is made to carry out under conditions of constant, unified, eliminate the interference to adsorption rate of humidity, temperature and flow velocity, it is ensured that the stability of adsorption sampling result and accuracy.
2, the adsorbing and sampling device that this utility model provides, by measuring and recording ambient air pressure, compensation basis, eliminating air pressure is provided to sampling flow and the interference of measurement result, to further ensure stability and the accuracy of adsorption sampling result for sampling flow and measurement result.
3, the adsorbing and sampling device that this utility model provides, easily the sampling tube after adsorption sampling can be connected in gas chromatograph, and sampling tube has been heated thermal desorption process, gas chromatograph is coordinated to complete to resolve, have that design is simple, stable performance, with low cost, absorption resolves the advantage that same effect is good.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All any modification, equivalent substitution and improvement etc. made within spirit of the present utility model and principle, are all contained in protection domain of the present utility model.
Claims (5)
1. an adsorbing and sampling device, it is characterised in that described device includes: main control module, dehumidification module, temperature control modules, flow speed control module, sampling tube；
Described main control module connects described dehumidification module, described temperature control modules and described flow speed control module respectively, is used for controlling the work of each module；
Described dehumidification module, for filtering the excessive moisture in the sample gas flowing through described sampling tube；
Described temperature control modules, for controlling to flow through the temperature of the sample gas of described sampling tube so that it is keep stationary temperature；
Described flow speed control module, for controlling to flow through the flow velocity of the sample gas of described sampling tube so that it is keep constant flow velocity；
Described sampling tube, under sample gas is in stationary temperature and flow conditions, adsorbs the tested substance in described sample gas；Wherein, sample gas flows through the gas circuit of described sampling tube is airtight.
2. adsorbing and sampling device as claimed in claim 1, it is characterised in that
Described dehumidification module uses drying tube, and described temperature control modules uses temperature control box, and described flow speed control module uses air pump；Described sampling tube is placed in described temperature control box, and described temperature control box includes heater block, refrigeration part and temperature sensor；
One end of described drying tube is placed in sample gas, and the other end is connected with the air inlet of described sampling tube；The gas outlet of described sampling tube connects described air pump；When described air pump works, sample gas flows through described drying tube, described sampling tube and described air pump successively.
3. adsorbing and sampling device as claimed in claim 2, it is characterised in that described device also includes flow monitoring module；
Described flow monitoring module is connected with described main control module, flows through the flow value of sample gas of described sampling tube for statistics, when flow required by satisfied sampling, notifies described main control module, and is quit work by air pump described in described master control module controls.
4. adsorbing and sampling device as claimed in claim 3, it is characterised in that described device also includes air pressure sensing module；
Described air pressure sensing module is connected with described main control module, and for measuring the atmospheric pressure value of external environment, and atmospheric pressure value measurement obtained is stored in described main control module；
Described flow monitoring module utilizes the atmospheric pressure value of storage in described main control module to compensate the flow value of sample gas, gets rid of the air pressure interference to sampling flow.
5. the adsorbing and sampling device as described in any one of claim 2-4, it is characterised in that
Described sampling tube, described temperature control box and described main control module are as a Whole-dismountable；
After dismounting, described sampling tube is connected in gas chromatogram gas circuit, and temperature control box described in described master control module controls is warming up to design temperature, coordinates described gas chromatogram gas circuit to complete absorption and resolves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081911.8U CN205449580U (en) | 2015-12-22 | 2015-12-22 | Adsorb sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081911.8U CN205449580U (en) | 2015-12-22 | 2015-12-22 | Adsorb sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN205449580U true CN205449580U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521081911.8U Withdrawn - After Issue CN205449580U (en) | 2015-12-22 | 2015-12-22 | Adsorb sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548417A (en) * | 2015-12-22 | 2016-05-04 | 潍坊歌尔电子有限公司 | An adsorption sampling device and an adsorption sampling method |
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2015
- 2015-12-22 CN CN201521081911.8U patent/CN205449580U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548417A (en) * | 2015-12-22 | 2016-05-04 | 潍坊歌尔电子有限公司 | An adsorption sampling device and an adsorption sampling method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20181019 |