CN203719971U - Atmospheric sampling system capable of performing calibration in whole course - Google Patents
Atmospheric sampling system capable of performing calibration in whole course Download PDFInfo
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- CN203719971U CN203719971U CN201420024781.3U CN201420024781U CN203719971U CN 203719971 U CN203719971 U CN 203719971U CN 201420024781 U CN201420024781 U CN 201420024781U CN 203719971 U CN203719971 U CN 203719971U
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Abstract
The utility model provides an atmospheric sampling system capable of performing the calibration in the whole course. The atmospheric sampling system comprises an outdoor gas inlet pipeline, a fixed flange and an insect-preventing and waterproof cap, wherein the sampling system internally comprises multiple paths of manifold branches, a mass flow meter, a humidity sensor, a pressure transmitter, a sampling pump, an internal and external calibration control box, a central control unit, an A/D (Analog/Digital) module, an I/O (Input/Output) module, and a gas analytical instrument, wherein the central control unit and the A/D (Analog/Digital) module, an I/O (Input/Output) module are respectively connected with the central control unit; the gas analytical instrument is provided with a heating device; the internal and external calibration control box is connected with the central control unit; the humidity sensor, the mass flow meter and the pressure transmitter are respectively connected with the central control unit through the A/D module. The atmospheric sampling system has the advantages of reducing choice of entering of water drops in storm weather, snowflakes, snow grains and fine sand flying up in the air in the sampling system, correcting the problem of inaccuracy in measurement, caused by gaseous pollutants entering a pipeline, through calibration in the whole course, and ensuring that a measurement result is relatively close to an environment atmospheric true value. When an outdoor environment changes, the hysteresis quality of artificial control and inaccuracy of experience control are prevented, and a relatively accurate measurement result is achieved.
Description
Technical field
The utility model relates to monitoring system, and particularly one can omnidistancely be demarcated atmospheric sampling system.
Background technology
Conventionally monitoring code requirement is regularly demarcated air gaseous contaminant analyser, but because the dust of surrounding air in process sampling system up-to-date style gas can be attached to sampling system pipeline inner wall, the accumulation of dust can cause interference to measurement result, for the annoyance level of attachment to monitoring result in quantised samples system, need to realize omnidistance demarcation to the periodic calibrating of whole monitoring system.
At present, the air gaseous contaminant of monitoring, its chemical characteristic is very active greatly, accurately just require surrounding air can enter as early as possible analytical instrument in order to measure, shorten air in the ducted residence time, strengthen sampling flow and can shorten the air residence time, but excessive air sample size will speed up the pollution of dust to sampling system simultaneously.Therefore, need to find an equilibrium point to ensure that air residence time in sampling system locates in the reasonable scope.
Supporting sampling system in traditional environment air gaseous contaminant automatic monitor for continuously station, its outdoor section is generally vertical pipeline sample introduction, this design can normally be worked under most weather conditions, but at the larger sleety weather of wind-force, raindrop or snowflake/snow particle may directly enter sample lines, and monitoring is impacted.Therefore need a kind of new product head it off.
Utility model content
The purpose of this utility model is exactly the above-mentioned defect that will overcome prior art, provide one can omnidistancely demarcate atmospheric sampling system, can reduce the chance that wind and rain weather water droplet, snowflake, snow grain and sand and dust enter sampling system, and can be in the time that outdoor environment changes, avoid the inexactness of manually operated hysteresis quality and experience control, reach more accurate measurement effect.
For achieving the above object, what the utility model provided can omnidistancely demarcate atmospheric sampling system, comprise sampling system, sampling system outdoor section is arranged on monitoring station roof, comprise outside air-intake duct road and mounting flange, outside air-intake duct road comprises outer sampling pipe, interior sampling pipe, interior mixing tee and zero standard gas circuit pipe, sampling system indoor section comprises the multichannel manifold being connected with air inlet pipeline, mass flowmeter, sampling pump and gas analysis instrument, gas analysis instrument is provided with heating arrangement, also comprise humidity sensor, pressure unit, inside and outside calibration control box, central control unit and the A/D module being connected respectively with it and I/O module, humidity sensor is arranged in multichannel manifold, pressure unit is arranged in a branch of multichannel manifold, inside and outside calibration control box is connected with central control unit, humidity sensor, mass flowmeter is connected with central control unit by A/D module respectively with pressure unit, outside air-intake duct road also comprises insect protected tarpaulin, sample feeding pipe road is bent downwardly, insect protected tarpaulin is arranged on the front end on outside air-intake duct road.
The utility model can omnidistancely be demarcated atmospheric sampling system, and wherein said central control unit adopts inserted computer to form and is connected with display module.
The utility model can omnidistancely be demarcated atmospheric sampling system, and wherein said central control unit is connected with substation industrial computer, and central control unit is provided with RS485 interface, RJ45 interface or wireless network card.
The utility model can omnidistancely be demarcated atmospheric sampling system, and wherein said sampling system indoor section also comprises dynamic calibrator and moisture trap, and dynamic calibrator is connected with zero standard gas circuit pipe, and moisture trap is in the lower end of multichannel manifold.
The utility model can be by omnidistance advantage and the good effect of demarcating atmospheric sampling system: because outside air-intake duct road is designed to reclinate form, and installed insect protected tarpaulin additional, reduce wind and rain weather water droplet, snowflake, snow grain and sand and dust and entered the chance of sampling system.Adopt humidity sensor, pressure unit, inside and outside calibration control box and central control unit, switch demarcation state by central control unit, demarcate and revised air gaseous contaminant when by sample lines by whole process, because the measurement that caused damage by the factor such as pipeline, dust to cause is inaccurate, thereby make measurement result closer to ambient atmosphere actual value, especially there is application value for the cleaner background station of surrounding air and Background Station.
That describes below in conjunction with embodiment that the utility model provides in detail can omnidistance technical scheme of demarcating atmospheric sampling system.
Brief description of the drawings
Fig. 1 is that the utility model can whole process be demarcated the block scheme of atmospheric sampling system;
Fig. 2 is that the utility model can the omnidistance structural representation of demarcating sampling system in atmospheric sampling system.
Embodiment
With reference to Fig. 1, what the utility model provided can omnidistancely demarcate atmospheric sampling system, comprises A/D module, display module and I/O module that sampling system is connected respectively with central control unit and with it.
Sampling system outdoor section is arranged on monitoring station roof, comprises outside air-intake duct road and mounting flange.In conjunction with reference to Fig. 2, outdoor sample introduction pipeline is designed to reclinate form, and air inlet pipeline comprises outer sampling pipe 2, interior sampling pipe 3, interior mixing tee 4 and zero standard gas circuit pipe 5, and the front end on outside air-intake duct road is provided with insect protected tarpaulin 1.
The outside air-intake duct road of sampling system is connected with the indoor section of sampling system straight down.Be arranged on indoor have multichannel manifold 6, mass flowmeter 7, sampling pump 8, pressure unit 9, moisture trap 10, dynamic calibrator 11 and gas analysis instrument 12.Gas analysis instrument 12 is provided with heating arrangement, and gas analysis instrument 12 is connected with central control unit with inside and outside calibration control box.
In multichannel manifold 6, humidity sensor is installed, a branch of multichannel manifold 6 is connected with pressure unit 9.
Inserted computer, as the central control unit of whole system, coordinates I/O module, A/D module and display module to form the core component of whole this system, is provided with RS485 interface.Humidity sensor, pressure unit 9 and mass flowmeter 7 are connected with central control unit successively with A/D module respectively.
Central control unit is connected respectively with sampling pump 8 with heating arrangement by I/O module.
Can omnidistancely demarcate in atmospheric sampling system at the utility model, central control unit is also connected with substation industrial computer.Central control unit is supported wired and wireless network communication mode, can connect by RJ45 interface or wireless network card the network of monitoring station, with the platform communication such as substation industrial computer.
The following describes the utility model can the omnidistance course of work of demarcating atmospheric sampling system.
This sampling system can be divided into two kinds of mode of operations: normal sampling pattern and calibration pattern.Wherein calibration pattern can be subdivided into again Internal Standard Mode and omnidistance calibration pattern.
Enabling the utility model can omnidistancely demarcate after atmospheric sampling system:
1. normally sampling: the system overwhelming majority time is in this mode of operation.
Surrounding air is subject to sampling pump 8 draft effects, enters sample lines from insect protected tarpaulin 1, becomes sample gas to be analyzed.Bulky grain object and insect, owing to stopped by insect protected tarpaulin 1, cannot enter sample lines.In multichannel manifold 6, the relative humidity of humidity sensor measurement sample gas, in the time that this value is greater than setting value, central control unit control heating arrangement is opened automatically, heating sample gas.The pressure unit 9 that 6 one branches of multichannel manifold connect is measured the pressure of sample gas, in the time that pressure unit 9 measured values exceed normal range, illustrates in sampling system pipeline and stops up seriously, need to safeguard sampling system.
2. Internal Standard Mode: in the time selecting Internal Standard Mode, inside and outside calibration control box control gas enters gas analysis instrument 12.Sampling pump 8 is worked always at the same time, other not calibration instrument not affected by gas, continue analysis environments air.
3. omnidistance calibration mode: omnidistance calibration mode can be used to judge that Calibration System is to measurement result effect; Select while mixing gas pressure steel cylinder, can carry out calibration to many analytical instrument again simultaneously.Select after this pattern, excessive gas directly leads to the outdoor position near sampling entrance from inside and outside calibration control box, and sampling pump 8 postpones to quit work after 20 seconds, and the effect that gas is subject to analyser pump enters analyser.Under this pattern, all analytical instrument are affected by gas all.
The utility model can omnidistance workflow of demarcating atmospheric sampling system be:
When normal sampling, open sampling pump 8, now sampling pump 8 is to turn round compared with the slow-speed of revolution.Flow sensor is transferred to central control unit by flow signal by RS485 interface, central control unit calculates the time that sample gas stops in sampling system, in the time that the residence time is greater than setting value, central control unit by command to I/O module, and then the sampling flow of raising sampling pump 8, shorten the residence time of sample gas in sampling system, until the residence time is in setting range.Humidity sensor sends by A/D module the sample air humidity degree recording to central control unit, central control unit judges that current humidity is whether within setting threshold values scope, if sample gas relative humidity exceeds setting range, start the heating arrangement in sampling system by I/O module; If sample gas relative humidity is lower than setting value, heating arrangement does not start.Central control unit connects the network of monitoring station by RJ45 interface or wireless network card, with substation industrial computer platform communication, be supported under Windows system and check the parameters such as humidity, pressure, sampling flow velocity, the sample gas residence time, can control sampling system and do interior mark or omnidistance demarcation.
Embodiment recited above is described preferred implementation of the present utility model, not design of the present utility model and scope is limited.Do not departing under the prerequisite of the utility model design concept; various modification and improvement that this area ordinary person makes the technical solution of the utility model; all should drop into protection domain of the present utility model; the technology contents of the utility model request protection, has all been documented in claims.
Claims (4)
1. can omnidistancely demarcate atmospheric sampling system for one kind, comprise sampling system, described sampling system outdoor section is arranged on monitoring station roof, comprise outside air-intake duct road and mounting flange, described outside air-intake duct road comprises outer sampling pipe (2), interior sampling pipe (3), interior mixing tee (4) and zero standard gas circuit pipe (5), described sampling system indoor section comprises the multichannel manifold (6) being connected with described outside air-intake duct road, mass flowmeter (7), sampling pump (8) and gas analysis instrument (12), described gas analysis instrument (12) is provided with heating arrangement, it is characterized in that: also comprise humidity sensor, pressure unit (9), inside and outside calibration control box, central control unit and the A/D module being connected respectively with it and I/O module, described humidity sensor is arranged in described multichannel manifold (6), described pressure unit (9) is arranged in a branch of described multichannel manifold (6), described inside and outside calibration control box is connected with described central control unit, described humidity sensor, mass flowmeter (7) is connected with described central control unit by described A/D module respectively with pressure unit (9), described outdoor sample introduction pipeline also comprises insect protected tarpaulin (1), described outdoor sample feeding pipe road is bent downwardly, described insect protected tarpaulin (1) is arranged on the front end on described outside air-intake duct road.
2. according to claim 1ly can omnidistance demarcate atmospheric sampling system, it is characterized in that: wherein said central control unit adopts inserted computer to form and is connected with display module.
3. according to claim 1 and 2ly can omnidistance demarcate atmospheric sampling system, it is characterized in that: wherein said central control unit is connected with substation industrial computer, described central control unit is provided with RS485 interface, RJ45 interface or wireless network card.
4. according to claim 3ly can omnidistance demarcate atmospheric sampling system, it is characterized in that: wherein said sampling system indoor section also comprises dynamic calibrator (11) and moisture trap (10), described dynamic calibrator (11) is connected with described zero standard gas circuit pipe (5), and described moisture trap (10) is arranged on the lower end of described multichannel manifold (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024781.3U CN203719971U (en) | 2014-01-15 | 2014-01-15 | Atmospheric sampling system capable of performing calibration in whole course |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024781.3U CN203719971U (en) | 2014-01-15 | 2014-01-15 | Atmospheric sampling system capable of performing calibration in whole course |
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| Publication Number | Publication Date |
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| CN203719971U true CN203719971U (en) | 2014-07-16 |
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| CN201420024781.3U Expired - Fee Related CN203719971U (en) | 2014-01-15 | 2014-01-15 | Atmospheric sampling system capable of performing calibration in whole course |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389425A (en) * | 2017-08-28 | 2017-11-24 | 广东省环境监测中心 | A kind of anti-gaseous state analyzer condensation and dewfall and dust-proof device and method |
| CN108593820A (en) * | 2018-05-14 | 2018-09-28 | 铜陵蓝光电子科技有限公司 | A kind of stationary source volatile organic matter（VOCS）On-line monitoring system samples preprocessor |
| CN113295586A (en) * | 2021-05-14 | 2021-08-24 | 南京源恒环境研究所有限公司 | Data calibration method of atmospheric pollution monitoring system |
-
2014
- 2014-01-15 CN CN201420024781.3U patent/CN203719971U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389425A (en) * | 2017-08-28 | 2017-11-24 | 广东省环境监测中心 | A kind of anti-gaseous state analyzer condensation and dewfall and dust-proof device and method |
| CN108593820A (en) * | 2018-05-14 | 2018-09-28 | 铜陵蓝光电子科技有限公司 | A kind of stationary source volatile organic matter（VOCS）On-line monitoring system samples preprocessor |
| CN113295586A (en) * | 2021-05-14 | 2021-08-24 | 南京源恒环境研究所有限公司 | Data calibration method of atmospheric pollution monitoring system |
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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: 20140716 Termination date: 20150115 |
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| EXPY | Termination of patent right or utility model |