CN109187833B - Automatic sample injection device for pressure-controllable constant-temperature detection of sulfur hexafluoride gas and application method thereof - Google Patents
Automatic sample injection device for pressure-controllable constant-temperature detection of sulfur hexafluoride gas and application method thereof Download PDFInfo
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- CN109187833B CN109187833B CN201811011407.9A CN201811011407A CN109187833B CN 109187833 B CN109187833 B CN 109187833B CN 201811011407 A CN201811011407 A CN 201811011407A CN 109187833 B CN109187833 B CN 109187833B
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- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 24
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 19
- 238000001514 detection method Methods 0.000 title description 9
- 239000007789 gas Substances 0.000 claims abstract description 109
- 239000012159 carrier gas Substances 0.000 claims abstract description 87
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000010926 purge Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 12
- WMIYKQLTONQJES-UHFFFAOYSA-N hexafluoroethane Chemical compound FC(F)(F)C(F)(F)F WMIYKQLTONQJES-UHFFFAOYSA-N 0.000 description 4
- QYSGYZVSCZSLHT-UHFFFAOYSA-N octafluoropropane Chemical compound FC(F)(F)C(F)(F)C(F)(F)F QYSGYZVSCZSLHT-UHFFFAOYSA-N 0.000 description 4
- 229960004065 perflutren Drugs 0.000 description 4
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 4
- 238000004817 gas chromatography Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/24—Automatic injection systems
Abstract
The invention discloses an automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure, wherein: comprises a thermostatic chamber, wherein a temperature heating device is arranged in the thermostatic chamber; the automatic sample injection device also comprises a carrier gas passage and a sample gas passage; the carrier gas passage comprises a carrier gas inlet, a first electromagnetic valve, a second electromagnetic valve, a quantitative ring, a third electromagnetic valve, a fourth electromagnetic valve and a carrier gas outlet which are sequentially connected; the sample gas passage comprises a sample gas inlet, a fifth electromagnetic valve, a second electromagnetic valve, a quantitative ring, a third electromagnetic valve, a second pressure sensor, a flow controller, a sixth electromagnetic valve and a sample gas outlet which are sequentially connected. The invention has the advantages of easy identification of air peaks, and realization of constant temperature, constant pressure and quantitative sampling.
Description
Technical Field
The invention belongs to the technical field of gas detection devices, and particularly relates to an automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure and a use method thereof.
Background
When the gas chromatography is used for detecting air, carbon tetrafluoride, hexafluoroethane and octafluoropropane in sulfur hexafluoride gas, quantitative sampling is needed for a sulfur hexafluoride gas sample to be detected, then the sulfur hexafluoride gas sample is injected into a chromatographic column to separate components of the sample, and then the sulfur hexafluoride gas sample enters a detector (TCD (50 ℃) and FID) for detection.
There are two conventional sample injection methods:
1. the sample injection needle is used for manually injecting sample,
2. the sample injection valve automatically switches sample injection.
Both the above two sample injection methods are normal pressure sample injection (during sample injection, the sulfur hexafluoride gas pressure of the sample is the same as the ambient atmospheric pressure). In both methods, when quantitative (0.5 ml) sampling is performed, an opening is connected with the atmosphere (the needle head is connected with the atmosphere for the sampling needle, the exhaust end of the sampling valve is connected with the atmosphere for the sampling valve), and the whole sampling structure is exposed to the environment, in this case, the sampling amount is extremely easily influenced by the ambient atmosphere (the extreme values of the domestic ambient atmosphere are respectively 70 kilopascals and 101.3 kilopascals) and the ambient temperature, so that the sampling amount is inaccurate.
Due to the detection of components in sulfur hexafluoride gas: the contents of air, carbon tetrafluoride, hexafluoroethane and octafluoropropane are very low, so that in order to improve the detection precision, the chromatographic column of the chromatographic detector needs to be lengthened, and the resistance is increased after the length of the chromatographic column is increased.
Therefore, in order to ensure a constant flow rate of the detector, the pressure before the chromatographic column (i.e. carrier gas pressure, the pressure before the column of conventional chromatography is 1 kg gauge pressure, and the pressure before the column is 2 kg gauge pressure) must be increased. The carrier gas pressure (gauge pressure 1 kg) is greater than the sample gas pressure (normal sample gas pressure is normal pressure, namely gauge pressure is 0), and the carrier gas pressure gauge pressure (2 kg) is greater, so that the pressure difference between the carrier gas pressure (2 kg) and the sample pressure (0 kg) is increased.
The larger the pressure difference is, the larger the flow fluctuation generated during sample injection is. The larger the sample injection peak from the chromatogram. Because the sample injection peak and the air peak are adjacent and close, the phenomenon that the sample injection peak and the air peak are partially overlapped occurs, and misjudgment is caused, so that the detection result of the air component can be influenced.
Disclosure of Invention
The invention aims at solving the technical problem that the pressure-controllable constant-temperature automatic sample injection device for detecting sulfur hexafluoride gas and the application method thereof can ensure that the sampled sample gas is in a constant-temperature, constant-pressure and constant-volume state, so that the sample injection peak is reduced and the air peak is easy to distinguish. The constant temperature, constant pressure and quantitative sampling are realized, and the purpose of accurate measurement is achieved.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure, wherein:
comprises a thermostatic chamber, wherein a temperature heating device is arranged in the thermostatic chamber;
the automatic sample injection device also comprises a carrier gas passage and a sample gas passage;
the carrier gas passage comprises a carrier gas inlet, a first electromagnetic valve, a second electromagnetic valve, a quantitative ring, a third electromagnetic valve, a fourth electromagnetic valve and a carrier gas outlet which are sequentially connected;
the sample gas passage comprises a sample gas inlet, a fifth electromagnetic valve, a second electromagnetic valve, a quantitative ring, a third electromagnetic valve, a second pressure sensor, a flow controller, a sixth electromagnetic valve and a sample gas outlet which are connected in sequence;
the first electromagnetic valve and the third electromagnetic valve are respectively provided with two outlets, the second electromagnetic valve and the fourth electromagnetic valve are respectively provided with two inlets, the first outlet of the first electromagnetic valve is communicated with the first inlet of the second electromagnetic valve, the second outlet of the first electromagnetic valve is communicated with the first inlet of the fourth electromagnetic valve through a pressure reference pipeline, the outlet of the fifth electromagnetic valve is communicated with the second inlet of the second electromagnetic valve, the outlet of the second electromagnetic valve and the inlet of the third electromagnetic valve are respectively connected to two ends of the quantifying ring, the quantifying ring is positioned in a thermostatic chamber, the temperature heating device can heat the quantifying ring, the first outlet of the third electromagnetic valve is communicated with the second inlet of the fourth electromagnetic valve, and the second outlet of the third electromagnetic valve is communicated with the second pressure sensor; each electromagnetic valve can control the closing or opening of the respective inlet or outlet, and a first pressure sensor is arranged on the pressure reference pipeline.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the carrier gas outlet is connected with the chromatographic column.
And a pressure stabilizing valve is arranged on a pipeline between the fifth electromagnetic valve and the second electromagnetic valve.
The carrier gas flowing through the carrier gas passage is high-purity nitrogen.
The temperature heating device heats the heat exchange medium in the constant temperature chamber, and the heat exchange medium is coated on the quantitative ring to exchange heat with the gas in the quantitative ring.
The application method of the automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure comprises the following steps:
step one, a gas cylinder is abutted on a carrier gas inlet, carrier gas is emptied, a sample gas cylinder is abutted on a sample gas inlet,
step two, purging carrier gas:
closing a second outlet of the first electromagnetic valve, a second inlet of the second electromagnetic valve, a second outlet of the third electromagnetic valve and a first inlet of the fourth electromagnetic valve, so that the carrier gas sequentially passes through the carrier gas inlet, the first electromagnetic valve, the second electromagnetic valve, the quantitative ring, the third electromagnetic valve, the fourth electromagnetic valve and the carrier gas outlet and then enters the chromatographic column, and the passing pipeline is flushed with the carrier gas to ensure that no air exists in the pipeline;
step two, purging sample gas:
closing a first inlet of the second electromagnetic valve and a first outlet of the third electromagnetic valve, so that the sample gas sequentially passes through a sample gas inlet, a fifth electromagnetic valve, the second electromagnetic valve, a quantitative ring, the third electromagnetic valve, a second pressure sensor, a flow controller, a sixth electromagnetic valve and a sample gas outlet and is discharged, and the passing pipeline is flushed with the sample gas, so that no air exists in the pipeline;
step three, purging by referring to a pipeline;
closing a first outlet of the first electromagnetic valve and a second inlet of the fourth electromagnetic valve, so that the carrier gas sequentially passes through the carrier gas inlet, the first electromagnetic valve, the pressure reference pipeline, the fourth electromagnetic valve and the carrier gas outlet, then enters the chromatographic column, and the passing pipeline is flushed with the carrier gas, so that no air exists in the pipeline;
fourthly, locking the sample gas at high pressure and keeping the temperature constant;
closing a first inlet of a second electromagnetic valve and a first outlet of a third electromagnetic valve, sequentially passing high-pressure sample gas through a sample gas inlet, a fifth electromagnetic valve, the second electromagnetic valve, a quantifying ring, the third electromagnetic valve, a second pressure sensor, a flow controller, a sixth electromagnetic valve and a sample gas outlet, closing the second inlet of the second electromagnetic valve and the second outlet of the third electromagnetic valve at the moment, completing high-pressure locking of the sample gas in the quantifying ring, and then controlling a temperature heating device of a thermostatic chamber to heat the quantifying ring and control the constant temperature of the quantifying ring;
step five, the sample gas is decompressed to the appointed pressure:
closing a first outlet of the first electromagnetic valve and a second inlet of the fourth electromagnetic valve, so that the carrier gas sequentially passes through a carrier gas inlet, the first electromagnetic valve, a pressure reference pipeline, the fourth electromagnetic valve and the carrier gas outlet and then enters the chromatographic column, wherein the first pressure sensor records the pressure of the pressure reference pipeline, the flow controller is controlled to the minimum opening degree, the second outlet of the third electromagnetic valve is opened, constant-temperature high-pressure gas of the quantitative ring is slowly decompressed until the pressure value of the second pressure sensor corresponds to the pressure value of the first pressure sensor, the second outlet of the third electromagnetic valve is closed, and at the moment, the pressure and the temperature of sample gas in the quantitative ring are both designated pressure and temperature;
step six,
And opening the carrier gas passage and closing the sample gas passage, so that the carrier gas sequentially passes through the carrier gas inlet, the first electromagnetic valve, the second electromagnetic valve, the quantitative ring, the third electromagnetic valve, the fourth electromagnetic valve and the carrier gas outlet, then enters the chromatographic column, and the quantitative sample gas with specified pressure and temperature in the quantitative ring is sent into the chromatographic column to complete sample injection.
In the fifth step, the temperature of the sample gas in the quantifying ring is 40 ℃.
The invention has the following advantages:
when detecting the gas chromatography of 4 gas components of air, carbon tetrafluoride, hexafluoroethane and octafluoropropane in sulfur hexafluoride gas, the constant temperature and constant pressure control is carried out on the sulfur hexafluoride gas for sample injection, so that the influence of the change of the ambient temperature and the ambient atmospheric pressure on the sample injection amount is avoided.
When the gas chromatography is used for detecting 4 characteristic gas components of air, carbon tetrafluoride, hexafluoroethane and octafluoropropane in sulfur hexafluoride gas, the sampling pressure can be detected and adjusted, so that a chromatographic column of a chromatographic detector with proper length can be arranged.
And the quantitative sampling of the pressure matched with the pressure in front of the chromatographic column is controlled, the influence of a sample injection peak on an air peak is reduced, and the detection precision is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a state of use diagram of the present invention.
Wherein the reference numerals are as follows: the constant temperature chamber 1, the carrier gas passage 2, the carrier gas inlet 21, the first solenoid valve 22, the second solenoid valve 23, the dosing ring 24, the third solenoid valve 25, the fourth solenoid valve 26, the carrier gas outlet 27, the sample gas passage 3, the sample gas inlet 31, the fifth solenoid valve 32, the second pressure sensor 33, the flow controller 34, the sixth solenoid valve 35, the sample gas outlet 36, the pressure stabilizing valve 37, the pressure reference pipeline 4, the first pressure sensor 41, the chromatographic column 5, the carrier gas bottle a, and the sample gas bottle B.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
The invention relates to an automatic sample injection device for pressure-controllable constant-temperature detection of sulfur hexafluoride gas, wherein:
the device comprises a thermostatic chamber 1, wherein a temperature heating device is arranged in the thermostatic chamber 1;
the automatic sample injection device also comprises a carrier gas passage 2 and a sample gas passage 3;
the carrier gas passage 2 includes a carrier gas inlet 21, a first solenoid valve 22, a second solenoid valve 23, a dosing ring 24, a third solenoid valve 25, a fourth solenoid valve 26, and a carrier gas outlet 27, which are connected in this order;
the sample gas passage 3 comprises a sample gas inlet 31, a fifth electromagnetic valve 32, a second electromagnetic valve 23, a quantifying ring 24, a third electromagnetic valve 25, a second pressure sensor 33, a flow controller 34, a sixth electromagnetic valve 35 and a sample gas outlet 36 which are connected in sequence;
the first electromagnetic valve 22 and the third electromagnetic valve 25 are respectively provided with two outlets, the second electromagnetic valve 23 and the fourth electromagnetic valve 26 are respectively provided with two inlets, the first outlet of the first electromagnetic valve 22 is communicated with the first inlet of the second electromagnetic valve 23, the second outlet of the first electromagnetic valve 22 is communicated with the first inlet of the fourth electromagnetic valve 26 through the pressure reference pipeline 4, the outlet of the fifth electromagnetic valve 32 is communicated with the second inlet of the second electromagnetic valve 23, the outlet of the second electromagnetic valve 23 and the inlet of the third electromagnetic valve 25 are respectively connected with two ends of the quantifying ring 24, the quantifying ring 24 is positioned in the constant temperature chamber 1, the temperature heating device can heat the quantifying ring 24, the first outlet of the third electromagnetic valve 25 is communicated with the second inlet of the fourth electromagnetic valve 26, and the second outlet of the third electromagnetic valve 25 is communicated with the second pressure sensor 33; each solenoid valve can control the closing or opening of the respective inlet or outlet, and a first pressure sensor 41 is mounted on the pressure reference line 4.
The carrier gas outlet 27 is connected to the chromatographic column 5.
A pressure stabilizing valve 37 is installed on the line between the fifth solenoid valve 32 and the second solenoid valve 23.
The carrier gas flowing through the carrier gas passage 2 is high-purity nitrogen gas.
The temperature heating device heats the heat exchange medium in the thermostatic chamber 1, and the heat exchange medium is coated on the quantifying ring 24 to exchange heat with the gas in the quantifying ring 24.
The application method of the automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure comprises the following steps:
step one, a gas cylinder is abutted on a carrier gas inlet 21, carrier gas is exhausted, a sample gas cylinder is abutted on a sample gas inlet 31,
step two, purging carrier gas:
closing the second outlet of the first electromagnetic valve 22, the second inlet of the second electromagnetic valve 23, the second outlet of the third electromagnetic valve 25 and the first inlet of the fourth electromagnetic valve 26, so that the carrier gas sequentially passes through the carrier gas inlet 21, the first electromagnetic valve 22, the second electromagnetic valve 23, the quantifying ring 24, the third electromagnetic valve 25, the fourth electromagnetic valve 26 and the carrier gas outlet 27, then enters the chromatographic column, washes the passing pipeline clean by the carrier gas, and ensures that no air exists in the pipeline;
step two, purging sample gas:
closing the first inlet of the second electromagnetic valve 23 and the first outlet of the third electromagnetic valve 25, so that the sample gas sequentially passes through the sample gas inlet 31, the fifth electromagnetic valve 32, the second electromagnetic valve 23, the quantifying ring 24, the third electromagnetic valve 25, the second pressure sensor 33, the flow controller 34, the sixth electromagnetic valve 35 and the sample gas outlet 36 and is discharged, and the passing pipeline is flushed with the sample gas, so that no air exists in the pipeline;
step three, purging by referring to a pipeline;
closing the first outlet of the first electromagnetic valve 22 and the second inlet of the fourth electromagnetic valve 26, so that the carrier gas sequentially passes through the carrier gas inlet 21, the first electromagnetic valve 22, the pressure reference pipeline 4, the fourth electromagnetic valve 26 and the carrier gas outlet 27, and then enters the chromatographic column, and the passing pipeline is flushed with the carrier gas, so that no air exists in the pipeline;
fourthly, locking the sample gas at high pressure and keeping the temperature constant;
closing the first inlet of the second electromagnetic valve 23 and the first outlet of the third electromagnetic valve 25, sequentially passing the high-pressure sample gas through the sample gas inlet 31, the fifth electromagnetic valve 32, the second electromagnetic valve 23, the quantifying ring 24, the third electromagnetic valve 25, the second pressure sensor 33, the flow controller 34, the sixth electromagnetic valve 35 and the sample gas outlet 36, closing the second inlet of the second electromagnetic valve 23 and the second outlet of the third electromagnetic valve 25 at the moment, completing high-pressure locking of the sample gas in the quantifying ring 24, and then controlling the temperature heating device of the thermostatic chamber 1 to heat the quantifying ring 24 and controlling the constant temperature of the quantifying ring;
step five, the sample gas is decompressed to the appointed pressure:
closing the first outlet of the first electromagnetic valve 22 and the second inlet of the fourth electromagnetic valve 26, so that the carrier gas sequentially passes through the carrier gas inlet 21, the first electromagnetic valve 22, the pressure reference pipeline 4, the fourth electromagnetic valve 26 and the carrier gas outlet 27 and then enters the chromatographic column, the first pressure sensor 41 records the pressure of the pressure reference pipeline 4, the flow controller 34 is controlled to the minimum opening degree, the second outlet of the third electromagnetic valve 25 is opened, constant-temperature high-pressure gas of the quantifying ring 24 is slowly decompressed until the pressure value of the second pressure sensor 33 corresponds to the pressure value of the first pressure sensor 41, the second outlet of the third electromagnetic valve 25 is closed, and at the moment, the pressure and the temperature of the sample gas in the quantifying ring 24 are both specified pressure and temperature;
step six,
The carrier gas passage 2 is opened, the sample gas passage 3 is closed, so that the carrier gas sequentially passes through the carrier gas inlet 21, the first electromagnetic valve 22, the second electromagnetic valve 23, the quantitative ring 24, the third electromagnetic valve 25, the fourth electromagnetic valve 26 and the carrier gas outlet 27, and then enters the chromatographic column, and the quantitative sample gas with specified pressure and temperature in the quantitative ring 24 is fed into the chromatographic column, so that sample injection is completed.
In step five the sample gas temperature in the dosing ring 24 was 40 ℃.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (5)
1. The application method of the automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under the pressure is characterized by comprising the following steps: the automatic sample injection device for detecting sulfur hexafluoride gas at a controllable constant temperature under pressure comprises a constant temperature chamber (1), wherein a temperature heating device is arranged in the constant temperature chamber (1);
the automatic sample injection device also comprises a carrier gas passage (2) and a sample gas passage (3);
the carrier gas passage (2) comprises a carrier gas inlet (21), a first electromagnetic valve (22), a second electromagnetic valve (23), a quantitative ring (24), a third electromagnetic valve (25), a fourth electromagnetic valve (26) and a carrier gas outlet (27) which are connected in sequence;
the sample gas passage (3) comprises a sample gas inlet (31), a fifth electromagnetic valve (32), a second electromagnetic valve (23), a quantitative ring (24), a third electromagnetic valve (25), a second pressure sensor (33), a flow controller (34), a sixth electromagnetic valve (35) and a sample gas outlet (36) which are connected in sequence;
the first electromagnetic valve (22) and the third electromagnetic valve (25) are respectively provided with two outlets, the second electromagnetic valve (23) and the fourth electromagnetic valve (26) are respectively provided with two inlets, the first outlet of the first electromagnetic valve (22) is communicated with the first inlet of the second electromagnetic valve (23), the second outlet of the first electromagnetic valve (22) is communicated with the first inlet of the fourth electromagnetic valve (26) through a pressure reference pipeline (4), the outlet of the fifth electromagnetic valve (32) is communicated with the second inlet of the second electromagnetic valve (23), the outlet of the second electromagnetic valve (23) and the inlet of the third electromagnetic valve (25) are respectively connected to two ends of the quantifying ring (24), the quantifying ring (24) is positioned in the constant temperature chamber (1), the temperature heating device can heat the quantifying ring (24), the first outlet of the third electromagnetic valve (25) is communicated with the second inlet of the fourth electromagnetic valve (26), and the second outlet of the third electromagnetic valve (25) is communicated with the second pressure sensor (33); each electromagnetic valve can control the closing or opening of the respective inlet or outlet, and a first pressure sensor (41) is arranged on the pressure reference pipeline (4); the carrier gas outlet (27) is connected with the chromatographic column (5); the specific application method of the automatic sample injection device comprises the following steps:
firstly, abutting a gas carrying cylinder on a carrier gas inlet (21), evacuating carrier gas, and abutting a sample gas cylinder on a sample gas inlet (31);
step two, purging carrier gas:
closing a second outlet of the first electromagnetic valve (22), a second inlet of the second electromagnetic valve (23), a second outlet of the third electromagnetic valve (25) and a first inlet of the fourth electromagnetic valve (26) to enable the carrier gas to sequentially pass through the carrier gas inlet (21), the first electromagnetic valve (22), the second electromagnetic valve (23), the quantitative ring (24), the third electromagnetic valve (25), the fourth electromagnetic valve (26) and the carrier gas outlet (27), then enter the chromatographic column, wash the passing pipeline clean with the carrier gas, and ensure that no air exists in the pipeline;
step two, purging sample gas:
closing a first inlet of the second electromagnetic valve (23) and a first outlet of the third electromagnetic valve (25) to enable sample gas to sequentially pass through the sample gas inlet (31), the fifth electromagnetic valve (32), the second electromagnetic valve (23), the quantitative ring (24), the third electromagnetic valve (25), the second pressure sensor (33), the flow controller (34), the sixth electromagnetic valve (35) and the sample gas outlet (36) and then be discharged, and flushing the passing pipeline with the sample gas to ensure that no air exists in the pipeline;
step three, purging with reference to a pipeline:
closing a first outlet of the first electromagnetic valve (22) and a second inlet of the fourth electromagnetic valve (26) so that the carrier gas sequentially passes through the carrier gas inlet (21), the first electromagnetic valve (22), the pressure reference pipeline (4), the fourth electromagnetic valve (26) and the carrier gas outlet (27), and then enters the chromatographic column, and the passing pipeline is flushed with the carrier gas to ensure that no air exists in the pipeline;
fourthly, locking the sample gas at high pressure and keeping the temperature constant:
closing a first inlet of the second electromagnetic valve (23) and a first outlet of the third electromagnetic valve (25), sequentially passing high-pressure sample gas through a sample gas inlet (31), a fifth electromagnetic valve (32), the second electromagnetic valve (23), a quantifying ring (24), the third electromagnetic valve (25), a second pressure sensor (33), a flow controller (34), a sixth electromagnetic valve (35) and a sample gas outlet (36), closing the second inlet of the second electromagnetic valve (23) and the second outlet of the third electromagnetic valve (25) at the moment, completing high-pressure locking of the sample gas in the quantifying ring (24), and then controlling a temperature heating device of a thermostatic chamber (1) to heat the quantifying ring (24) and control the constant temperature of the quantifying ring;
step five, the sample gas is decompressed to the appointed pressure:
closing a first outlet of the first electromagnetic valve (22) and a second inlet of the fourth electromagnetic valve (26) so that the carrier gas sequentially passes through the carrier gas inlet (21), the first electromagnetic valve (22), the pressure reference pipeline (4), the fourth electromagnetic valve (26) and the carrier gas outlet (27) and then enters the chromatographic column, the first pressure sensor (41) records the pressure of the pressure reference pipeline (4), the flow controller (34) is controlled to the minimum opening degree, the second outlet of the third electromagnetic valve (25) is opened, constant-temperature high-pressure gas of the quantitative ring (24) is slowly decompressed until the pressure value of the second pressure sensor (33) corresponds to the pressure value of the first pressure sensor (41), and the second outlet of the third electromagnetic valve (25) is closed, and at the moment, the pressure and the temperature of the sample gas in the quantitative ring (24) are both the designated pressure and the designated temperature;
step six,
And (3) opening the carrier gas passage (2) and closing the sample gas passage (3) so that the carrier gas sequentially passes through the carrier gas inlet (21), the first electromagnetic valve (22), the second electromagnetic valve (23), the quantitative ring (24), the third electromagnetic valve (25), the fourth electromagnetic valve (26) and the carrier gas outlet (27), then enters the chromatographic column, and the quantitative sample gas with specified pressure and temperature in the quantitative ring (24) is sent into the chromatographic column to complete sample injection.
2. The method for using the pressure-controllable constant-temperature automatic sample injection device for detecting sulfur hexafluoride gas according to claim 1, wherein the method is characterized in that: a pressure stabilizing valve (37) is arranged on a pipeline between the fifth electromagnetic valve (32) and the second electromagnetic valve (23).
3. The method for using the pressure-controllable constant-temperature automatic sample injection device for detecting sulfur hexafluoride gas according to claim 1, wherein the method is characterized in that: the carrier gas flowing in the carrier gas passage (2) is high-purity nitrogen.
4. The method for using the pressure-controllable constant-temperature automatic sample injection device for detecting sulfur hexafluoride gas according to claim 1, wherein the method is characterized in that: the temperature heating device heats a heat exchange medium in the thermostatic chamber (1), and the heat exchange medium is coated on the quantitative ring (24) and exchanges heat with gas in the quantitative ring (24).
5. The method for using the pressure-controllable constant-temperature automatic sample injection device for detecting sulfur hexafluoride gas according to claim 1, wherein the method is characterized in that: in step five, the temperature of the sample gas in the quantifying ring (24) was 40 ℃.
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| CN201811011407.9A CN109187833B (en) | 2018-08-31 | 2018-08-31 | Automatic sample injection device for pressure-controllable constant-temperature detection of sulfur hexafluoride gas and application method thereof |
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| CN201811011407.9A CN109187833B (en) | 2018-08-31 | 2018-08-31 | Automatic sample injection device for pressure-controllable constant-temperature detection of sulfur hexafluoride gas and application method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0330650A2 (en) * | 1988-02-22 | 1989-08-30 | VOEST-ALPINE STAHL GESELLSCHAFT m.b.H. | Device for gas analysis |
| JPH07294504A (en) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | Gas chromatograph and carrier gas flow rate control method thereof |
| CN101004366A (en) * | 2006-01-21 | 2007-07-25 | 江苏江分电分析仪器有限公司 | Manual type device for sampling quantitative gas |
| CN102004136A (en) * | 2010-10-21 | 2011-04-06 | 上海科油石油仪器制造有限公司 | Chromatographic analysis control gas circuit device |
| CN102445508A (en) * | 2011-09-28 | 2012-05-09 | 上海仪盟电子科技有限公司 | Helium ion gas chromatograph and use method thereof |
| WO2015083793A1 (en) * | 2013-12-05 | 2015-06-11 | 株式会社堀場エステック | Gas chromatograph |
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| CN106053667A (en) * | 2016-07-14 | 2016-10-26 | 湘潭大学 | Multi-position hydrocarbon online detection equipment and method |
| CN106168612A (en) * | 2016-08-31 | 2016-11-30 | 许继集团有限公司 | A kind of gas analysis sampling device |
-
2018
- 2018-08-31 CN CN201811011407.9A patent/CN109187833B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0330650A2 (en) * | 1988-02-22 | 1989-08-30 | VOEST-ALPINE STAHL GESELLSCHAFT m.b.H. | Device for gas analysis |
| JPH07294504A (en) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | Gas chromatograph and carrier gas flow rate control method thereof |
| CN101004366A (en) * | 2006-01-21 | 2007-07-25 | 江苏江分电分析仪器有限公司 | Manual type device for sampling quantitative gas |
| CN102004136A (en) * | 2010-10-21 | 2011-04-06 | 上海科油石油仪器制造有限公司 | Chromatographic analysis control gas circuit device |
| CN102445508A (en) * | 2011-09-28 | 2012-05-09 | 上海仪盟电子科技有限公司 | Helium ion gas chromatograph and use method thereof |
| WO2015083793A1 (en) * | 2013-12-05 | 2015-06-11 | 株式会社堀場エステック | Gas chromatograph |
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| CN106053667A (en) * | 2016-07-14 | 2016-10-26 | 湘潭大学 | Multi-position hydrocarbon online detection equipment and method |
| CN106168612A (en) * | 2016-08-31 | 2016-11-30 | 许继集团有限公司 | A kind of gas analysis sampling device |
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