CN217543005U - GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line - Google Patents
GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line Download PDFInfo
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- CN217543005U CN217543005U CN202221431560.9U CN202221431560U CN217543005U CN 217543005 U CN217543005 U CN 217543005U CN 202221431560 U CN202221431560 U CN 202221431560U CN 217543005 U CN217543005 U CN 217543005U
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Abstract
The utility model provides a GC-IMS sample introduction device capable of detecting volatile aroma components of a plurality of groups of samples on line, which comprises an electromagnetic multi-pipeline gas shunt row, a controller and a purging gas source; the electromagnetic multi-pipeline gas shunt row comprises a main pipeline, a purge gas electromagnetic valve and at least two three-way electromagnetic valves, wherein one end of the main pipeline is communicated with a purge gas source through the purge gas electromagnetic valve, the three-way electromagnetic valves are sequentially connected on the main pipeline in series, and the other end of the main pipeline is a GC-IMS sample inlet interface end; the shunt interface of each three-way electromagnetic valve is set as a sample interface end; and the controller controls the working states of the purge gas electromagnetic valve and the three-way electromagnetic valves. The sample introduction device has the advantages of realization of multi-sample continuous sample introduction online detection, automatic control, remote operation, convenient disassembly and no sample residue in each detection.
Description
Technical Field
The utility model relates to an analysis field of volatile gaseous composition among the tobacco industry, specific theory has related to a but GC-IMS sampling device of on-line measuring multiunit sample volatile fragrant smell composition.
Background
The IMS technology is an analysis technology for characterizing chemical ion substances based on the difference of migration speeds of different gas-phase ions in an electric field, and has the characteristics of high detection sensitivity, wide detection range and convenient operation, and the detection limit can be realized in the range from ppt to ppb. The GC-IMS environment gas analyzer combines a gas chromatography technology GC with an IMS technology, gas components to be detected are subjected to GC chromatography separation under the action of carrier gas, molecular ions are formed through ionization of a radioactive ion source, the molecular ions drift to a Faraday disc under the action of drift gas in an ion migration tube of the IMS, and a voltage intensity signal is output. The GC-IMS environmental gas analyzer is dedicated to detection of trace volatile components in gas, does not need a vacuum system, can be used for sample pretreatment and can work under high-temperature and high-humidity conditions, and labor expenditure is reduced; the sample introduction mode of the instrument is flexible and changeable, and can be manually introduced by one key or automatically introduced, so that the aim of continuous online detection is fulfilled; have important applications in many fields, such as: food safety detection, disease diagnosis, flower plant online analysis, water body odor detection, production process control and the like.
The current GC-IMS environmental gas analyzer, as a device capable of realizing remote continuous online monitoring, can only meet the continuous online monitoring of volatile fragrance components of one sample, and can only be realized by purchasing a new instrument when the continuous online monitoring of a plurality of groups of samples is required, so that the equipment investment is large and errors among different equipment cannot be eliminated.
Therefore, it is necessary to research a new sample feeding device based on the prior art to realize multi-site continuous online monitoring by only one instrument, which is a key problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims at prior art not enough to provide a but GC-IMS sampling device of on-line measuring multiunit sample volatility fragrant smell composition, the device passes through the on-off control of a plurality of three-way valves, realizes switching on of different samples and test access, through the on-off control who sweeps the air supply, realizes cleaning of test access, reach and to realize that many samples advance appearance on-line measuring, automated control, long-range operation in succession, dismantle convenient and each time detect no remaining purpose of sample.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line comprises an electromagnetic multi-pipeline gas branch line row, a controller and a purging gas source;
the electromagnetic multi-pipeline gas shunt row comprises a main pipeline, a purge gas electromagnetic valve and at least two three-way electromagnetic valves, wherein one end of the main pipeline is communicated with a purge gas source through the purge gas electromagnetic valve, the three-way electromagnetic valves are sequentially connected on the main pipeline in series, and the other end of the main pipeline is a GC-IMS sample inlet interface end; the shunt interface of each three-way electromagnetic valve is set as a sample interface end;
and the controller controls the working states of the purge gas electromagnetic valve and the three-way electromagnetic valves.
Basically, the purging gas source is a nitrogen cylinder.
Basically, the controller is a PLC.
Basically, the purge gas solenoid valve is the electromagnetism angle valve.
Basically, the material of main pipeline is PE pipe or PB pipe or stainless steel pipe.
Basically, the pipeline for connecting the electromagnetic multi-pipeline gas shunt row with the purging gas source, the pipeline for connecting the sample interface end and the pipeline for connecting the GC-IMS sample inlet interface end are all made of PE (polyethylene) pipes, PB (lead-free) pipes or stainless steel pipes.
On the basis, the inner diameters of the main pipeline of the electromagnetic multi-pipeline gas shunt row, the pipeline connected with the purging gas source, the pipeline connected with the sample interface end and the pipeline connected with the GC-IMS sample inlet interface end are 3-5mm.
Basically, the sample interface end is externally connected with a sample tank or a sample cell.
Basically, the electromagnetic multi-pipeline gas shunt row further comprises a plastic shell or a metal shell which encapsulates the main pipeline, one purge gas electromagnetic valve and at least two three-way electromagnetic valves.
Basically, the controller is connected with the network module to realize remote communication.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the electromagnetic multi-pipeline gas shunt discharge device, the main pipeline is controlled to be communicated with different sample tanks/sample pools by controlling the on-off states of a plurality of three-way valves, and the GC-IMS environmental gas analyzer can be used for online detection of different samples; the purging gas source is controlled to be switched on and off, so that the purging work of residual gas in the main pipeline and the GC-IMS environmental gas analyzer pipeline is realized, the accuracy of each detection process is ensured, the automatic switching operation is realized, the remote control can be realized, and the labor intensity of the volatile aroma component analysis of various samples is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a GC-IMS sample injection device capable of detecting multiple groups of volatile aroma components of samples on line.
In the figure: 1. electromagnetic multi-pipeline gas shunt discharge; 2. a controller; 3. a source of purge gas; 4. a main pipeline; 5. a purge gas solenoid valve; 6. a three-way electromagnetic valve; 7. GC-IMS ambient gas analyzer.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in figure 1, a GC-IMS sample injection device capable of detecting multiple groups of sample volatile aroma components on line comprises an electromagnetic multi-pipeline gas branch row 1, a controller 2 and a purging gas source 3.
The electromagnetic multi-pipeline gas shunt row 1 comprises a main pipeline 4, a purge gas electromagnetic valve 5 and at least two three-way electromagnetic valves 6, wherein one end of the main pipeline 4 is communicated with a purge gas source 3 through the purge gas electromagnetic valve 5, the three-way electromagnetic valves 6 are sequentially connected in series on the main pipeline 4, and the other end of the main pipeline 4 is a GC-IMS sample inlet interface end and is used for being connected with a sample inlet of a GC-IMS ambient gas analyzer 7; the branching interface of each three-way electromagnetic valve 6 is set as a sample interface end and is used for connecting a sample cell/sample tank 8.
The controller 2 controls the working states of the purge gas electromagnetic valve 5 and the three-way electromagnetic valves 6.
In this embodiment, the purge gas source 3 is a nitrogen cylinder, the controller 2 is a PLC, the purge gas solenoid valve 5 is an electromagnetic angle valve, the material of the main pipeline 4 is a PE pipe or a PB pipe or a stainless steel pipe, the material of the pipeline of the electromagnetic multi-pipeline gas branch line 1 connected with the purge gas source 3, the pipeline connected with the sample interface end and the pipeline connected with the GC-IMS sample injection interface end is a PE pipe or a PB pipe or a stainless steel pipe, and the inner diameters of the main pipeline of the electromagnetic multi-pipeline gas branch line, the pipeline connected with the purge gas source, the pipeline connected with the sample interface end and the pipeline connected with the GC-IMS sample injection interface end are 3-5mm.
The electromagnetic multi-pipeline gas shunt row also comprises a plastic shell or a metal shell which encapsulates the main pipeline, one purge gas electromagnetic valve and at least two three-way electromagnetic valves.
In order to realize remote control, the controller 2 is connected with a network module to realize remote communication.
The working principle is as follows:
PLC is used for controlling the on-off state and the on-off time of purge gas solenoid valve 5 and three solenoid valve 6, and three solenoid valve's use quantity is decided according to sample quantity, when three kinds of samples of needs on-line detection simultaneously, only need connect two three solenoid valves and to these two three solenoid valves control can, all the other solenoid valves are in the unobstructed default state of main road, and the quantity restriction to detectable sample is decided based on the design of product, from no upper limit in principle.
When the PLC controls the branch of one three-way electromagnetic valve of the electromagnetic multi-pipeline gas branch row 1 to be switched on, the rest three-way electromagnetic valves are in the states of branch closing and main circuit switching on, the purge gas electromagnetic valve is also in the closed state, under the action of a suction pump of the GC-IMS environmental gas analyzer, a sample is sucked into a sample inlet of the GC-IMS environmental gas analyzer through the main pipeline, after sample introduction is finished, the branch of the corresponding sample introduction three-way electromagnetic valve is closed, and the main circuit is switched on.
After the analysis of the volatile aroma components of the sample in the GC-IMS environmental gas analyzer is finished, the PLC controls the purge gas electromagnetic valve to be opened, nitrogen enters the main pipeline from the nitrogen cylinder and then enters the sample inlet of the GC-IMS environmental gas analyzer, residual gas in the main pipeline and the GC-IMS environmental gas analyzer is swept and taken away through the carrier gas outlet of the analyzer by the nitrogen, after the sweep is finished, the PLC controls the purge gas electromagnetic valve to be closed, the branch of the electromagnetic three-way valve corresponding to the second group of samples is controlled to be conducted, and new volatile aroma components of the sample enter the GC-IMS environmental gas analyzer through the main pipeline to circulate until the experiment is finished.
It should be finally noted that the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: modifications can still be made to the embodiments of the invention or equivalents may be substituted for some of the features; without departing from the spirit of the technical solution of the present invention, the present invention should be covered by the technical solution of the present invention.
Claims (10)
1. A GC-IMS sample introduction device capable of detecting multiple groups of volatile aroma components of samples on line is characterized in that: the device comprises an electromagnetic multi-pipeline gas shunt row, a controller and a purging gas source;
the electromagnetic multi-pipeline gas shunt row comprises a main pipeline, a purge gas electromagnetic valve and at least two three-way electromagnetic valves, wherein one end of the main pipeline is communicated with a purge gas source through the purge gas electromagnetic valve, the three-way electromagnetic valves are sequentially connected on the main pipeline in series, and the other end of the main pipeline is a GC-IMS sample inlet interface end; the shunt interface of each three-way electromagnetic valve is set as a sample interface end;
and the controller controls the working states of the purge gas electromagnetic valve and each three-way electromagnetic valve.
2. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 1, wherein: the purging gas source is a nitrogen cylinder.
3. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 1 or 2, wherein: the controller is a PLC.
4. The GC-IMS sample injection device capable of detecting multiple groups of sample volatile flavor components on line according to claim 3, wherein: the purge gas electromagnetic valve is an electromagnetic angle valve.
5. The GC-IMS sample injection device capable of detecting multiple groups of sample volatile flavor components on line according to claim 1, 2 or 4, wherein: the main pipeline is made of PE pipes or PB pipes or stainless steel pipes.
6. The GC-IMS sample injection device capable of detecting multiple groups of sample volatile aroma components on line according to claim 5, wherein: the electromagnetic multi-pipeline gas shunt row is connected with a pipeline of a purging gas source, a pipeline connected with a sample port end and a pipeline connected with a GC-IMS sample inlet port end, and the pipelines are made of PE (polyethylene) pipes, PB (Poly butylenes) pipes or stainless steel pipes.
7. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 5 or 6, wherein: the inner diameters of a main pipeline of the electromagnetic multi-pipeline gas shunt row, a pipeline connected with a purging gas source, a pipeline connected with a sample port end and a pipeline connected with a GC-IMS sample injection port end are 3-5mm.
8. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 7, wherein: the sample interface end is externally connected with a sample tank or a sample cell.
9. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 8, wherein: the electromagnetic multi-pipeline gas shunt row also comprises a plastic shell or a metal shell which encapsulates the main pipeline, one purge gas electromagnetic valve and at least two three-way electromagnetic valves.
10. The GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line according to claim 9, wherein: the controller is connected with the network module to realize remote communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221431560.9U CN217543005U (en) | 2022-06-09 | 2022-06-09 | GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221431560.9U CN217543005U (en) | 2022-06-09 | 2022-06-09 | GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line |
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| CN217543005U true CN217543005U (en) | 2022-10-04 |
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| CN202221431560.9U Active CN217543005U (en) | 2022-06-09 | 2022-06-09 | GC-IMS sample introduction device capable of detecting multiple groups of sample volatile aroma components on line |
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- 2022-06-09 CN CN202221431560.9U patent/CN217543005U/en active Active
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