CN102507271A - Time-phased multi-sample air sampler - Google Patents
Time-phased multi-sample air sampler Download PDFInfo
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- CN102507271A CN102507271A CN2011101097922A CN201110109792A CN102507271A CN 102507271 A CN102507271 A CN 102507271A CN 2011101097922 A CN2011101097922 A CN 2011101097922A CN 201110109792 A CN201110109792 A CN 201110109792A CN 102507271 A CN102507271 A CN 102507271A
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Abstract
The invention relates to a time-phased multi-sample air sampler, which comprises a single-chip microcomputer, an incubator and at least one air path. A temperature controller is arranged in the incubator. The air path comprises an air inlet, absorbing bottles, a drying bottle, a flow sensor and an air outlet which are serially connected. The flow sensor and the temperature controller are electrically connected with the single-chip microcomputer. The air inlet is connected with at least two absorbing bottles in parallel through a front connecting pipe. The time-phased multi-sample air sampler is characterized in that each absorbing bottle is serially connected with a sucking pump, and the absorbing bottles and the sucking pumps are arranged in the incubator; and the sucking pumps are electrically connected with the single-chip microcomputer and are communicated with the drying bottle through a rear connecting pipe. Since a plurality of absorbing bottles are connected in parallel in one air path of the air sampler, the flow can be flexibly controlled, the time-phased multi-sample automatic constant-temperature acquisition can be conducted in one air path more accurately and flexibly, the control accuracy is high, the labor is saved and the service life of equipment can be prolonged.
Description
Technical field
The present invention relates to a kind of air sampler, relate to a kind of sampling thief that can gather a plurality of samples in the different periods respectively specifically, belong to the environment monitoring technical field.
Background technology
The general gas circuit of existing air sampler can only be gathered a sample, is made up of absorption bottle, flowmeter, aspiration pump and time set.Be used to gather SO
2, NO
XDuring sample, two gas channels are set in instrument generally, gather a SO respectively simultaneously
2, one, NO
XSample.China's utility model patent 90204510.5 discloses a kind of 24 hours automatically continuous air samplers of constant temperature; Be mainly used in environmental administration and carry out the air sample collection; Its two sampling bottles are connected to the air intake opening place of solenoid valve, connect with drying bottle, constant current hole, flowmeter, aspiration pump in the gas outlet of solenoid valve.Though this sampling thief can be gathered atmosphere at any time in 24 hours; But need the manual operation opening and closing, not only troublesome poeration, and time is difficult to control; Can not in the standard code time, gather the desired gas sample; And often solenoid valve can not accurately cooperate with aspiration pump, and its gas content of the gas sample of collection is difficult to statistics in a setting-up time, influences the analysis result of air sampling.At present; National environmental protection portion has issued HJ2.2-2008 " environmental impact assessment technology guide rule atmospheric environment " standard on Dec 31st, 2008; Wherein regulation one-level environmental evaluation project is obtained local times 02,05,08,11,14,17,20,23 point at least; The pollutant quality concentration value in 8 moment, two, three grades of assessment items obtain the pollutant quality concentration value in 02,08,14,20: 4 moment of local time at least.Therefore, carry out will going to the monitoring point 8 times when one-level is estimated with existing instrument, and the most of the time all outside normal working hours, very time-consuming, effort.
Summary of the invention
To the deficiency that prior art exists, technical matters to be solved by this invention is: a kind of time-sharing multiple-sample air sampler is provided, samples automatically in different time sections, and precise control, labor savings, and durable in use.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is: a kind of time-sharing multiple-sample air sampler, comprise single-chip microcomputer, constant temperature oven and at least one gas circuit, and temperature controller is set in the constant temperature oven; Said gas circuit comprises air intake opening, absorption bottle, drying bottle, flow sensor and the exhausr port of serial connection; Said flow sensor, temperature controller are electrically connected with single-chip microcomputer; Its air intake opening is through at least two absorption bottles of preceding connecting pipe parallel connection; Its each absorption bottle aspiration pump of all connecting, said absorption bottle, aspiration pump place in the constant temperature oven; Said aspiration pump is electrically connected with single-chip microcomputer and is communicated with drying bottle through the back connecting pipe.
The effect of constant temperature oven is the absorption efficiency that guarantees and improve absorption liquid in the absorption bottle.By the Single-chip Controlling temperature controller, the interior temperature of constant temperature oven is reached temperature is set during work.
Flow sensor is used for the flow of measuring gas channel; The flow signal that flow sensor is surveyed during work reaches single-chip microcomputer; Control the flow of aspiration pump in view of the above by single-chip microcomputer, make the flow of flows through sensor reach setting value, realize the sampling of constant current amount or by setting the accurately purpose of sampling.
Two gas circuits or four gas circuits are arranged, all parallelly connected 4 to 8 absorption bottles and aspiration pumps in its each gas circuit in the above-mentioned time-sharing multiple-sample air sampler.Wherein there are 1 absorption bottle and 1 aspiration pump to constitute a branch road, are connected in parallel between preceding connecting pipe and the back connecting pipe.
Above-mentioned time-sharing multiple-sample air sampler, its said aspiration pump so long as the aspiration pump that has a retaining valve all can, preferred diaphragm pump.Its effect be can switching a gas circuit in the gas circuit, it is open-minded to be implemented in the gas circuit aspiration pump, all the other aspiration pumps cut out the gas circuit in the gas circuit automatically, thereby realize gathering automatically at times the purpose of a plurality of air samples.
The preferred low discharge mass flow sensor of described flow sensor.Flow sensor is used for measuring flow, and its flow sensor can be the low discharge mass flow sensor, also can use other flowmeter, like orifice metre, reaches the purpose of flow measurement.
This air sampler is parallelly connected a plurality of absorption bottles in a gas circuit; With single-chip microcomputer opening, stopping by the condition control aspiration pump of setting to realize the conversion of a sampling gas circuit switching; And Control Flow flexibly; Make the automatic constant-temperature collection of carrying out time-sharing multiple-sample of accurate and flexible more in a gas circuit, and precise control, labor savings.And, can prolong service life of equipment because aspiration pump is more more durable than solenoid valve.
Description of drawings
Below in conjunction with accompanying drawing and embodiment to further explain of the present invention.
Fig. 1 is the structural representation of a gas circuit of an embodiment of the present invention.
Embodiment
Embodiment 1
A kind of time-sharing multiple-sample air sampler, it comprises two gas circuits that single-chip microcomputer, constant temperature oven and structure are identical.Fig. 1 is the structural representation of an one of which gas circuit, and is as shown in Figure 1, and temperature controller 20, membrane pump 4,6,8,10 and low discharge mass flow sensor 13 all are electrically connected with single-chip microcomputer 22; Be provided with temperature controller 20, absorption bottle 3,5,7,9 and membrane pump 4,6,8,10 in the constant temperature oven 21; The air intake opening 1 of its gas circuit is through four absorption bottles 3,5,7 and 9 of preceding connecting pipe 2 parallel connections, wherein all connect accordingly a membrane pump 4,6,8 or 10 and be communicated with drying bottle 12 through back connecting pipe 11 of each absorption bottle 3,5,7 or 9; Air intake opening 1, respective absorption bottle 3,5,7 or 9, respective diaphragm pump 4,6,8 or 10 are connected in series with drying bottle 12, low discharge mass flow sensor 13 and exhausr port 16.
That is to say; This time-sharing multiple-sample air sampler comprises two gas circuits, and its any one gas circuit can be regarded the integral body of being made up of by aforementioned structure air intake opening 1, preceding connecting pipe 2, absorption bottle 3,5,7 and 9, membrane pump 4,6,8 and 10, back connecting pipe 11, drying bottle 12, low discharge mass flow sensor 13, exhausr port 16, temperature controller 20, constant temperature oven 21, single-chip microcomputer 22 separately as.Its absorption bottle 3 is connected with membrane pump 4, absorption bottle 5 is connected with membrane pump 6, and absorption bottle 7 is connected with membrane pump 8, absorption bottle 9 be parallel to respectively after membrane pump 10 is connected before between connecting pipe 2 and the back connecting pipe 11.During work; Under the control of single-chip microcomputer 22; Absorption bottle 3 sampling, membrane pump 4 is open-minded, and membrane pump 6 membrane pumps 8 membrane pumps 10 cut out gas and are then drained into atmosphere through air intake opening 1, preceding connecting pipe 2, absorption bottle 3, membrane pump 4, back connecting pipe 11, drying bottle 12, flow sensor 13 to exhausr port 16.In like manner, absorption bottle 5 samplings, membrane pump 6 is open-minded, and membrane pump 4 membrane pumps 8 membrane pumps 10 cut out; Absorption bottle 7 samplings, membrane pump 8 is open-minded, and membrane pump 4 membrane pumps 6 membrane pumps 10 cut out; Absorption bottle 9 samplings, membrane pump 10 is open-minded, and membrane pump 4 membrane pumps 6 membrane pumps 8 cut out.Only single-chip microcomputer 22 is controlled the respective diaphragm pump works when each sample collecting, and membrane pump is not worked when not gathering.Its temperature controller 20 is measured the temperature in constant temperature ovens 21 and signal is conducted to single-chip microcomputer 22, and single-chip microcomputer 22 control temperature controllers 20 make the temperature in the constant temperature oven 21 remain on design temperature, realize the constant temperature sampling.Its low discharge mass flow sensor 13 is measured and is conducted to single-chip microcomputer 22 through the gas stream value of low discharge mass flow sensor 13 and with signal, and the work of single-chip microcomputer 22 control membrane pumps makes the flow value of gas keep the setting flow, realizes accurately sampling.
Embodiment 2
The difference part of present embodiment and embodiment 1 is that absorption bottle in its each gas circuit and aspiration pump all are set to 8, and all the other structures are all consistent with embodiment 1.For technical scheme of the present invention, no matter be provided with how many absorption bottles, such as 2,6,8 etc., its technical essential is, all a connect membrane pump and be communicated with drying bottle of its each absorption bottle.
Claims (4)
1. a time-sharing multiple-sample air sampler comprises single-chip microcomputer, constant temperature oven and at least one gas circuit, and temperature controller is set in the constant temperature oven; Said gas circuit comprises air intake opening, absorption bottle, drying bottle, flow sensor and the exhausr port of serial connection; Said flow sensor, temperature controller are electrically connected with single-chip microcomputer; Its air intake opening is through at least two absorption bottles of preceding connecting pipe parallel connection; It is characterized in that: its each absorption bottle aspiration pump of all connecting, said absorption bottle, aspiration pump place in the constant temperature oven; Said aspiration pump is electrically connected with single-chip microcomputer and is communicated with drying bottle through the back connecting pipe.
2. time-sharing multiple-sample air sampler according to claim 1 is characterized in that: it is provided with two gas circuits or four gas circuits, all parallelly connected 4 to 8 absorption bottles in its each gas circuit.
3. time-sharing multiple-sample air sampler according to claim 2 is characterized in that: said aspiration pump is a membrane pump.
4. time-sharing multiple-sample air sampler according to claim 3 is characterized in that: described flow sensor is the low discharge mass flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101097922A CN102507271A (en) | 2011-04-29 | 2011-04-29 | Time-phased multi-sample air sampler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101097922A CN102507271A (en) | 2011-04-29 | 2011-04-29 | Time-phased multi-sample air sampler |
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| CN102507271A true CN102507271A (en) | 2012-06-20 |
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| CN2011101097922A Pending CN102507271A (en) | 2011-04-29 | 2011-04-29 | Time-phased multi-sample air sampler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293032A (en) * | 2013-05-24 | 2013-09-11 | 深圳国技仪器有限公司 | Atmospheric sampling system with real-time temperature and flow control function |
| CN104020019A (en) * | 2014-06-05 | 2014-09-03 | 上海大学 | Portable automatic collecting device of volatile organic compounds in atmosphere |
| CN104266878A (en) * | 2014-09-30 | 2015-01-07 | 张其森 | Automatic sample-changing sampler for quality of ambient air |
| CN105158419A (en) * | 2015-08-25 | 2015-12-16 | 江苏远望仪器有限公司 | Pumping type gas sampling monitoring device |
| CN113092687A (en) * | 2021-04-11 | 2021-07-09 | 李彦 | Urban environment air detection and automatic sampling device |
-
2011
- 2011-04-29 CN CN2011101097922A patent/CN102507271A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293032A (en) * | 2013-05-24 | 2013-09-11 | 深圳国技仪器有限公司 | Atmospheric sampling system with real-time temperature and flow control function |
| CN104020019A (en) * | 2014-06-05 | 2014-09-03 | 上海大学 | Portable automatic collecting device of volatile organic compounds in atmosphere |
| CN104266878A (en) * | 2014-09-30 | 2015-01-07 | 张其森 | Automatic sample-changing sampler for quality of ambient air |
| CN105158419A (en) * | 2015-08-25 | 2015-12-16 | 江苏远望仪器有限公司 | Pumping type gas sampling monitoring device |
| CN113092687A (en) * | 2021-04-11 | 2021-07-09 | 李彦 | Urban environment air detection and automatic sampling device |
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Application publication date: 20120620 |