CN204008574U - Gas chromatograph - Google Patents
Gas chromatograph Download PDFInfo
- Publication number
- CN204008574U CN204008574U CN201420149641.9U CN201420149641U CN204008574U CN 204008574 U CN204008574 U CN 204008574U CN 201420149641 U CN201420149641 U CN 201420149641U CN 204008574 U CN204008574 U CN 204008574U
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- CN
- China
- Prior art keywords
- carrier gas
- flow
- pressure
- gas
- threshold value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000012159 carrier gas Substances 0.000 claims abstract description 70
- 239000007789 gas Substances 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000000052 comparative effect Effects 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 6
- 230000006854 communication Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Abstract
The utility model provides a kind of gas flow adjusting means and gas chromatograph of analyzing under the inappropriate state of flow of carrier gas of can preventing.Gas flow adjusting means is provided with pressure-regulating valve (5), and this pressure-regulating valve (5) has the adjusting portion (51) operating in the time regulating the flow of carrier gas, and in this gas flow adjusting means, adopts pressure sensor (6) detects the pressure of carrier gas.Control part (7) compares the detection signal from pressure transducer 6 and threshold value, and exports this comparative result.Because detection signal that can be based on from pressure transducer (6) and the comparative result of threshold value carry out suitable processing, so can prevent from analyzing under the inappropriate state of flow of carrier gas.
Description
Technical field
The utility model relates to the gas flow adjusting means for the flow that is supplied to the carrier gas in chromatographic column is regulated and has the gas chromatograph of this gas flow adjusting means.
Background technology
In gas chromatograph, carrier gas is supplied in chromatographic column together with test portion composition, separated in the process of each composition in this chromatographic column is passed through in carrier gas.Be supplied to the flow of the carrier gas in chromatographic column by automatically or manually controlling.In the case of the structure by manually the flow of carrier gas being controlled, for example operator can operate by the adjusting portion that pressure-regulating valve is had, and is adjusted to flow arbitrarily.
Fig. 5 is the skeleton diagram that the conventional example of the gas flow adjusting means of the pressure-regulating valve 101 with hand is shown.This gas flow adjusting means is the device for the flow of carrier gas is regulated, and has pressure-regulating valve 101 and pressure gauge 102.
Carrier gas is fed to pressure-regulating valve 101 from pipe arrangement 103, with the corresponding flux and flow direction pipe arrangement 104 of aperture of pressure-regulating valve 101.At pressure-regulating valve 101, be provided with the adjusting portion 105 operating in the time regulating the flow of carrier gas, by this adjusting portion 105 is operated, can regulate the aperture of pressure-regulating valve 101.
Be connected with pressure gauge 102 by take-off pipe 106 at pipe arrangement 104 midway.Pressure gauge 102 detects the pressure of the carrier gas in pipe arrangement 104, makes its force value be shown in display part 107.Operator confirms the force value of the display part 107 that is shown in pressure gauge 102 while by manual operation adjusting portion 105, can at random regulate thus the flow of carrier gas.
Utility model content
The problem that utility model will solve
In existing gas flow adjusting means as described above, although can confirm by the display part of pressure gauge 102 107 force value of the carrier gas after manual adjustments, if just can not determine whether appropriate flow but force value is not scaled to flow, and this judgement is on commission to operator.Therefore, probably can under the inappropriate state of flow of carrier gas, analyze.
For example,, start to analyze few in the situation that at the immobilising situation of carrier gas or flow in the same old way, in the time carrying out the control of the temperature rise for making chromatographic column, probably can produce that chromatographic column becomes high temperature and the drawback such as damaged.Again, in the situation that adopting the inflammable gas such as hydrogen as carrier gas, under the too much state of the flow of carrier gas, analyze in the same old way, there is the danger of blast.
The utility model is In view of the foregoing made just, and its object is to provide a kind of gas flow adjusting means and gas chromatograph of analyzing under the inappropriate state of flow of carrier gas of can preventing.
For the means of dealing with problems
The related gas flow adjusting means of the utility model is the gas flow adjusting means for the flow that is fed into the carrier gas in chromatographic column is regulated, and it is provided with pressure-regulating valve, sensor and control part.Described pressure-regulating valve has the adjusting portion operating in the time regulating the flow of carrier gas.Flow or the pressure of described sensor to carrier gas detects.Described control part compares the detection signal from described sensor and threshold value, and exports this comparative result.
According to such structure, adopt flow or the pressure of sensor to the carrier gas by manual adjustments to detect, detection signal and threshold value are compared, can carry out suitable processing based on this comparative result thus.Thus, even by the such structure of flow of manual adjustments carrier gas, also can prevent from analyzing under the inappropriate state of flow of carrier gas.
In the case of being less than described threshold value from the detection signal of described sensor, described control part can by the signal that represents this situation as a comparison result export.
According to such structure, at the immobilising situation of carrier gas or flow few in the situation that, detection signal that can be based on from sensor and the comparative result of threshold value carry out suitable processing.Thus, can under original state, carry out the control of the temperature rise for making chromatographic column, prevent that chromatographic column becomes high temperature and the drawback such as damaged.
In the case of more than the detection signal from described sensor is described threshold value, described control part can by represent this situation signal as a comparison result export.
According to such structure, in the case of the flow of carrier gas is too much, detection signal that can be based on from sensor and the comparative result of threshold value carry out suitable processing.Thus, in the situation that adopting the inflammable gass such as such as hydrogen as carrier gas, can prevent from analyzing the danger of caused blast under the too much state of the flow of carrier gas in the same old way.
Described gas flow adjusting means can also have the notifying device based on notifying from the comparative result of described control part output.
According to such structure, the detection signal based on from sensor and the comparative result of threshold value are notified, so confirmed this notice and carried out correspondence by operator, can prevent from reliably analyzing under the inappropriate state of flow of carrier gas.
The related gas chromatograph of the utility model is provided with chromatographic column, gas supply pipe road, pressure-regulating valve, sensor and control part.Described gas supply pipe road is supplied to carrier gas in described chromatographic column.Described pressure-regulating valve is arranged on described gas supply pipe road, has operated adjusting portion in the time regulating the flow of carrier gas.Flow or the pressure of described sensor to carrier gas detects.Described control part compares the detection signal from described sensor and threshold value, and exports this comparative result.
Described gas chromatograph also has the well heater that described chromatographic column is heated and the operating portion operating in the time that the described well heater of instruction heats.In this case, described control part can, in the time having indicated heating by described operating portion, compare the detection signal from described sensor and described threshold value.
According to such structure, in the operation of carrying out for heating chromatographic column, utilize sensor to detect flow or the pressure of carrier gas, detection signal and threshold value are compared, can carry out suitable processing based on this comparative result thus.Thus, at the immobilising situation of carrier gas or flow few in the situation that, can effectively prevent that chromatographic column from becoming high temperature and the drawback such as damaged produces.
The effect of utility model
According to the utility model, because detection signal that can be based on from sensor and the comparative result of threshold value carry out suitable processing, so can prevent from analyzing under the inappropriate state of flow of carrier gas.
Brief description of the drawings
Fig. 1 is the skeleton diagram that the configuration example of the related gas chromatograph of an example of the present utility model is shown.
Fig. 2 is the block diagram that the configuration example of the control part of Fig. 1 is shown.
Fig. 3 is the process flow diagram that an example of the processing of analyzing the control part while beginning is shown.
Fig. 4 is the process flow diagram that an example of the processing of the control part in analysis is shown.
Fig. 5 is the skeleton diagram that the conventional example of the gas flow adjusting means of the pressure-regulating valve with hand is shown.
Embodiment
Fig. 1 is the skeleton diagram that the configuration example of the related gas chromatograph of an example of the present utility model is shown.This gas chromatograph is by carrier gas being supplied to together with test portion composition to the equipment of analyzing in chromatographic column 1, except thering is above-mentioned chromatographic column 1, also there are column oven 2, gas introduction part 3, detecting device 4, pressure-regulating valve 5, pressure transducer 6, control part 7, operating portion 8, display part 9, loudspeaker 10 and storage part 11 etc.
Chromatographic column 1 is for example made up of capillary chromatographic column, in analytic process, in column oven 2, heats by well heater 21.Carrier gas is supplied in chromatographic column 1 from gas introduction part 3 together with each test portion composition.Each test portion composition is by separated in the process of chromatographic column 1, and detected by detecting device 4.Detecting device 4 can be made up of various detecting devices such as such as hydrogen flame ionization detectors (FID).
Gas introduction part 3 is for example, for carrier gas being imported to the parts in chromatographic column 1, being formed with test portion vaporizer (not shown) therein.Liquid sample is injected in this test portion vaporizer, and the test portion composition being vaporized in test portion vaporizer is fed in chromatographic column 1 together with carrier gas.
Carrier gas is supplied to gas introduction part 3 by gas supply pipe road 31.Pressure-regulating valve 5 is arranged at gas supply pipe road 31, has the adjusting portion 51 of operation in the time that the flow of carrier gas is regulated., operator, by adjusting portion 51 is carried out manual operation and opened pressure-regulating valve 5, can supply with carrier gas from gas supply pipe road 31 to gas introduction part 3 with any flow corresponding with this aperture.As pressure-regulating valve 5, for example, can adopt the various valves such as bellows valve or mass rate operation valve.
Pressure transducer 6 is connected in the way on gas supply pipe road 31 by branch line 32.Pressure transducer 6 detects the pressure of the carrier gas in the gas supply pipe road 31 between pressure-regulating valve 5 and gas introduction part 3.As pressure transducer 6, for example, can adopt the various sensors such as gauge pressure transducer, differential pressure pick-up or absolute pressure sensor.
Control part 7 is for example to comprise CPU(CPU (central processing unit)) structure, carry out the processing of the action for controlling gas chromatograph.Operating portion 8 for example consists of keyboard and mouse, and operator can be by operating to carry out various input operations to operating portion 8.Display part 9 is for example made up of liquid crystal display, makes various information be shown in display frame.Loudspeaker 10 is the devices for output sound.
Storage part 11 is for example by RAM(random access memory), ROM(ROM (read-only memory)) and the formation such as hard disk.In storage part 11, except storing the needed data of processing of control part 7, can also store the data that generated by the processing of control part 7.
In analytic process, by the driving by control part 7 control heaters 21, the chromatographic column 1 in column oven 2 is heated.For example, in the time heating up analysis, by well heater 21, the temperature rise of chromatographic column 1 is analyzed on one side on one side.On the other hand, in the time that constant temperature is analyzed, by well heater 21, the temperature of chromatographic column 1 is being remained under certain state and analyzed.
The detection signal of detecting device 4 and pressure transducer 6 is input to respectively control part 7.Control part 7 carries out computing based on the input signal from operating portion 8, and control signal is exported to display part 9 and loudspeaker 10.Now, display part 9 and loudspeaker 10 play a role as the notifying device for to operator's notification error state.
Fig. 2 is the block diagram that the configuration example of the control part 7 of Fig. 1 is shown.In this example, control part 7 forms gas flow adjusting means together with pressure-regulating valve 5, pressure transducer 6, operating portion 8, display part 9, loudspeaker 10 and storage part 11 etc., and this gas flow adjusting means is for regulating the flow that is supplied to the carrier gas in chromatographic column 1.Control part 7 is by carrying out executive routine by CPU, and for example handling part 71, Graphics Processing portion 72, acoustic processing portion 73 and communication process portion 74 etc. play a role as a comparison.
Relatively handling part 71 carries out the processing that the detection signal from pressure transducer 6 and threshold value are compared.The processing of this comparison handling part 71 is based on operator, the operation of operating portion 8 to be carried out.Specifically, by adopting operating portion 8 carrying out analyzing for making the operation starting, indicate in the heating of well heater 21, compared the processing of handling part 71.But, be not limited to give for making and analyze the instruction starting by the operation of operating portion 8, also can give from outside this instruction.
Above-mentioned threshold value is for example stored in storage part 11 as predefined value.Thus, relatively handling part 71 can be read threshold value from storage part 11, by its with compare from the detection signal of pressure transducer 6.But, by operator, operating portion 8 being operated, the structure that can set above-mentioned threshold value is also fine.
In this example, in the case of the detection signal from pressure transducer 6 lower than threshold value, i.e. the flow of carrier gas is lower than setting, the signal that represents this situation as a comparison result is exported from handling part 71 relatively.Relatively the comparative result of handling part 71 is output to Graphics Processing portion 72, acoustic processing portion 73 and communication process portion 74.
The processing that Graphics Processing portion 72 carries out for the demonstration of display part 9 is controlled.Flow by the carrier gas that obtains converting from the detection signal of pressure transducer 6 can show in display part 9 numerals.Relatively the comparative result of handling part 71 is that at the detection signal from pressure transducer 6, lower than threshold value, Graphics Processing portion 72 makes error message show at display part 9 based on this comparative result, thereby carries out error notification.As the error message now showing, can illustrate the inappropriate message of flow etc. that is intended to represent carrier gas.
The processing that acoustic processing portion 73 carries out for sound is exported from loudspeaker 10.Relatively the result of the comparison of handling part 71 is, at the detection signal from pressure transducer 6 lower than threshold value, by make acoustic processing portion 73 based on this comparative result from loudspeaker 10 output sounds, carry out error notification.As the sound of output now, can illustrate the inappropriate sound of flow etc. that is intended to represent carrier gas.But, do not carry out error notification by sound by other the sound such as buzzer sound and be also fine.
Communication process portion 74 carries out for the processing communicating between itself and external unit 12.Relatively the result of the comparison of handling part 71 is, at the detection signal from pressure transducer 6 lower than threshold value, to external unit 12 these comparative results of output, can carry out error notification by show or voice etc. by communication process portion 74 at external unit 12.The error notification of external unit 12 can be carried out with the form identical with the error notification of display part 9 as described above or loudspeaker 10, also can carry out with different forms.
But, be not limited to adopt as described above whole display part 9, loudspeaker 10 and external unit 12 to carry out the such structure of error notification, as long as can adopt these device at least one carry out error notification.Again, be not limited to display part 9, loudspeaker 10 and external unit 12, also can adopt other notifying device to carry out error notification.
Fig. 3 is the process flow diagram that an example of the processing of analyzing the control part 7 while beginning is shown.Conventionally, operator, in the adjusting portion 51 of on-stream pressure variable valve 5 and after having regulated the flow of carrier gas, operates operating portion 8, carries out thus for making to analyze the instruction starting.Carry out analyzing the instruction starting (step S101 is) for making in the case of operator, compared (step S102) from detection signal and the threshold value of pressure transducer 6.
Result is relatively, the pressure of the carrier gas being detected by pressure transducer 6 is more than threshold value words (being in step S102), and under this state, chromatographic column 1 heats (step S103) by well heater 21, proceeds to heat up and analyzes or constant temperature analysis.The opposing party, the pressure of the carrier gas being detected by pressure transducer 6 is lower than the words of threshold value (in step S102 no), the signal that represents this situation as a comparison result is output, and adopts thus at least one in display part 9, loudspeaker 10 and external unit 12 to carry out error notification (step S104).
Like this, in this example, adopts pressure sensor 6 detects the pressure of the carrier gas by manual adjustments, and detection signal and threshold value are compared, and can carry out suitable processing based on this comparative result thus.Specifically, at the immobilising situation of carrier gas or flow few in the situation that, detection signal that can be based on from pressure transducer 6 and the comparative result of threshold value carry out error notification.
Therefore, by being confirmed error notification by operator and carrying out correspondence, even by the such structure of flow of manual adjustments carrier gas, also can prevent from analyzing under the inappropriate state of flow of carrier gas.For example as shown in Figure 3, in the time of the operation of analyzing while starting, carried out utilizing operating portion 8 to heat chromatographic column 1, in the case of the detection signal to from pressure transducer 6 and threshold value compare, can under the inappropriate state of the flow of carrier gas, carry out the control of the temperature rise for making chromatographic column 1 in the same old way, thereby can prevent chromatographic column 1 from becoming high temperature and the drawback generations such as breakage.
Fig. 4 is the process flow diagram that an example of the processing of the control part 7 in analysis is shown.In analytic process, the detection signal from pressure transducer 6 and threshold value are compared to (step S201).The threshold value that now adopted is set to the value larger than the threshold value adopting at the step S102 of Fig. 3.
If the flow of carrier gas is appropriate, the pressure of the carrier gas being detected by pressure transducer 6 can be more than threshold value (in step S201 no), after having carried out predefined analysis action, analyzes and finishes (being in step S202).On the other hand, in analytic process, in the case of the pressure of the carrier gas that detected by pressure transducer 6 be more than threshold value (being in step S201), the signal that represents this situation as a comparison result is output, and adopts thus at least one in display part 9, loudspeaker 10 and external unit 12 to carry out error notification (step S203).In this case, in the moment of having carried out error notification, analyze and finish.
Like this, in this example, in the case of the flow of carrier gas is too much, detection signal that can be based on from pressure transducer 6 and the comparative result of threshold value carry out error notification.Thus, in the situation that the inflammable gass such as such as hydrogen are used as carrier gas, can prevent from analyzing the danger of caused blast under the too much state of the flow of carrier gas in the same old way.
In above example, to being compared to such structure, the pressure of pressure transducer 6 detected carrier gas and threshold value be illustrated.But, be not limited to such structure, can be for example to adopt flow sensor to detect the flow of carrier gas, flow and threshold value that carrier gas detected are compared to such structure.The sensors such as pressure transducer 6 or flow sensor are not limited to as above-mentioned example, separate the structure arranging with pressure-regulating valve 5, also can form integratedly with pressure-regulating valve 5.
Again, in above example, the comparative result of the detection signal based on from pressure transducer 6 and threshold value is carried out to the such formation of error notification and be illustrated, but be not limited to such formation, also result is carried out other processing based on the comparison.
Symbol description
1 chromatographic column
2 column ovens
3 gas introduction parts
4 detecting devices
5 pressure-regulating valves
6 pressure transducers
7 control parts
8 operating portions
9 display parts
10 loudspeakers
11 storage parts
12 external units
21 well heaters
31 gas supply pipe roads
32 branch lines
51 adjusting portions
71 compare handling part
72 Graphics Processing portions
73 acoustic processing portions
74 communication process portions.
Claims (4)
1. a gas chromatograph, is characterized in that, is provided with:
Chromatographic column;
Gas supply pipe road, described gas supply pipe road is supplied to carrier gas in described chromatographic column;
Pressure-regulating valve, described pressure-regulating valve is arranged on described gas supply pipe road, has the adjusting portion operating in the time regulating the flow of carrier gas;
Sensor, flow or the pressure of described sensor to carrier gas detects;
The well heater that described chromatographic column is heated;
Operated operating portion in the time that the described well heater of instruction heats; With
Control part, in the time having indicated heating by described operating portion, compares the detection signal from described sensor and threshold value, and exports this comparative result.
2. gas chromatograph as claimed in claim 1, is characterized in that,
In the case of being less than described threshold value from the detection signal of described sensor, described control part by the signal that represents this situation as a comparison result export.
3. gas chromatograph as claimed in claim 1, is characterized in that,
In the case of more than the detection signal from described sensor is described threshold value, described control part by represent this situation signal as a comparison result export.
4. the gas chromatograph as described in any one in claim 1～3, is characterized in that,
Also there is the notifying device based on notifying from the comparative result of described control part output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149641.9U CN204008574U (en) | 2014-03-28 | 2014-03-28 | Gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149641.9U CN204008574U (en) | 2014-03-28 | 2014-03-28 | Gas chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204008574U true CN204008574U (en) | 2014-12-10 |
Family
ID=52048554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420149641.9U Expired - Lifetime CN204008574U (en) | 2014-03-28 | 2014-03-28 | Gas chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204008574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047276A (en) * | 2022-01-17 | 2022-02-15 | 华谱科仪(北京)科技有限公司 | Chromatograph control method and device |
-
2014
- 2014-03-28 CN CN201420149641.9U patent/CN204008574U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047276A (en) * | 2022-01-17 | 2022-02-15 | 华谱科仪(北京)科技有限公司 | Chromatograph control method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
|
| CX01 | Expiry of patent term |