CN205879891U - Gaseous detecting system that switches of sample - Google Patents
Gaseous detecting system that switches of sample Download PDFInfo
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- CN205879891U CN205879891U CN201620826290.XU CN201620826290U CN205879891U CN 205879891 U CN205879891 U CN 205879891U CN 201620826290 U CN201620826290 U CN 201620826290U CN 205879891 U CN205879891 U CN 205879891U
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Abstract
The utility model discloses a gaseous detecting system that switches of sample, it connects a need checking sample gas cylinder for gas in the sample detecting gas cylinder, this gaseous detecting system that switches of sample contains: the chromatographic column, its entry linkage the need checking sample gas cylinder, sample gas route auto -change over device, it contains an entry, first export and second export, entry linkage the export of chromatographic column, gas detector, its entry linkage sample gas leads to auto -change over device's first export. Its advantage is: can portably and effectively control access to the gas composition of nickel reborner, do not need or excessive component is emptyyed through the device with some, has both increased the application range of instrument, can protect instrument, increase of service life again.
Description
Technical field
This utility model relates to standard mixture detection technique field, is specifically related to a kind of sample gas change detection system
System.
Background technology
Standard mixture is widely used in all trades and professions, and gas component therein has diversified compound mode.
After calibrating gas uses weighing method to prepare, in addition it is also necessary to detect by relative method.Detecting the most frequently used equipment is gas phase color
Spectrometer, chromatographic column, by after each for mixed gas Component seperation, sequentially enters detector, produces detection signal.Hydrogen flameionization is examined
Surveying device (FID) is the most frequently used detector, and it is especially suitable for hydrocarbon mixture is made quantitative analysis.If a preposition nickel converts
Stove, it is also possible to carbon monoxide, carbon dioxide are carried out quantitative analysis.But, nickel reburner to carbon monoxide, carbon dioxide dense
Spend restricted, the highest transformation efficiency that can affect, reduces accuracy.More seriously, if oxygen-containing in mixed gas, oxygen enters and turns
Changing stove can cause reburner to lose efficacy.So, this kind of standard mixture just cannot detect with this instrument.
Utility model content
The purpose of this utility model is to provide a kind of sample gas change detection system, and it can be easy and efficiently control
Enter the gas component of nickel reburner, a part be need not or excess component is vented through device, both added the use of instrument
Scope, can protect again instrument, increase the service life.
In order to achieve the above object, this utility model is achieved through the following technical solutions:
A kind of sample gas change detection system, it connects a testing sample gas cylinder, for detecting the gas in sample gas cylinder
Body, is characterized in that, comprises:
Chromatographic column, the testing sample gas cylinder described in the connection of its entrance；
Sample gas path switching device, it comprises an entrance, the first outlet and the second outlet, the entrance described chromatograph of connection
The outlet of post；
Detector, its entrance connects described sample gas and leads to the first outlet of switching device.
Above-mentioned sample gas change detection system, wherein:
Second outlet of described sample gas path switching device is connected to outdoor by a blow-down pipe.
Above-mentioned sample gas change detection system, wherein, described detector comprises:
Nickel reburner, its entrance connects described sample gas and leads to the first outlet of switching device；
Flame ionization ditector, its entrance connects the outlet of described nickel reburner.
Above-mentioned sample gas change detection system, wherein:
Described sample gas path switching device is tee ball valve.
This utility model compared with prior art has the advantage that
1, easy and simple to handle, improve the utilization rate of gas chromatograph；
2, excess component can effectively be removed, it is ensured that the accuracy of gas detecting；
3, the dead volume of the rustless steel tee ball valve selected is the least, and switching will not produce harmful effect to testing result；
4, unavoidable containing oxygen impurities in unstripped gas, the time-switching sample gas path switching dress of chromatographic column is flowed out according to oxygen
Put, reburner can be protected, increase the service life.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, this utility model is done and explains further
State.
As it is shown in figure 1, a kind of sample gas change detection system, it connects a testing sample gas cylinder 1, is used for detecting sample
Gas in gas cylinder 1, it comprises: chromatographic column 2, its entrance connect described in testing sample gas cylinder 1；Sample gas path switching device
4, it comprises an entrance, the first outlet and the second outlet, and entrance connects the outlet of described chromatographic column 2, and the second outlet is by one
Blow-down pipe is connected to outdoor；Detector 3, its entrance connects described sample gas and leads to the first outlet of switching device 4；Described gas
Detector comprises nickel reburner and flame ionization ditector (FID), and the nickel reburner entrance described sample gas of connection is logical cuts
First outlet of changing device 4, flame ionization ditector entrance connects the outlet of described nickel reburner；By above-mentioned sample gas
Path switching device 4 forms bypass between chromatographic column 2 and detector 3, gets final product easy and efficiently controls entrance nickel and turn
Change the gas component of stove, a part be need not or excess component is vented through device, both added the range of instrument, and again could
Protection instrument, increases the service life.
In the present embodiment, described sample gas path switching device 4 is rustless steel tee ball valve.
With carbon monoxide (100ppm), carbon dioxide (1000ppm) and methane (100ppm) hybrid standard gas in detection nitrogen
As a example by body, operational approach of the present utility model is:
Open gas chromatograph (i.e. chromatographic column 2 and detector 3), arrive the analysis condition specified；
Testing sample gas is accessed gas chromatograph entrance by decompressor；
Sample gas path switching device 4 is pushed the second outlet and connects blow-down pipe, open cylinder valve, decompressor, make sample gas enter
Enter gas chromatograph；
Sample gas separates in chromatographic column 2；
During 30s, sample gas path switching device 4 being pushed entrance and connects instrument, first carbon monoxide flows out chromatographic column 2, warp
Device enters nickel reburner, enters flame ionization ditector after being converted into hydro carbons, produces detection signal；
During 36s, methane flows out chromatographic column 2, enters nickel reburner, unconverted entrance flame ionization ditector, produces
Detection signal；
During 72s, carbon-dioxide flow goes out chromatographic column 2, and because 1000ppm is beyond converting limit value, the personnel that analyze are manual by sample
Gas path switching device 4 pushes the second outlet and connects at blow-down pipe, and carbon dioxide is directly vented, and does not enter back into nickel reburner and hydrogen
Flame ionization detector, detection terminates.
Although content of the present utility model has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that
The description stated is not considered as restriction of the present utility model.After those skilled in the art have read foregoing, for
Multiple amendment of the present utility model and replacement all will be apparent from.Therefore, protection domain of the present utility model should be by appended
Claim limit.
Claims (4)
1. a sample gas change detection system, it connects a testing sample gas cylinder (1), is used for detecting in sample gas cylinder (1)
Gas, it is characterised in that comprise:
Chromatographic column (2), the testing sample gas cylinder (1) described in the connection of its entrance；
Sample gas path switching device (4), it comprises an entrance, the first outlet and the second outlet, the entrance described chromatograph of connection
The outlet of post (2)；
Detector (3), its entrance connects described sample gas and leads to the first outlet of switching device (4).
2. sample gas change detection system as claimed in claim 1, it is characterised in that:
Second outlet of described sample gas path switching device (4) is connected to outdoor by a blow-down pipe.
3. sample gas change detection system as claimed in claim 1, it is characterised in that described detector comprises:
Nickel reburner, its entrance connects described sample gas and leads to the first outlet of switching device (4)；
Flame ionization ditector, its entrance connects the outlet of described nickel reburner.
4. sample gas change detection system as claimed in claim 1, it is characterised in that:
Described sample gas path switching device (4) is tee ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620826290.XU CN205879891U (en) | 2016-08-02 | 2016-08-02 | Gaseous detecting system that switches of sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620826290.XU CN205879891U (en) | 2016-08-02 | 2016-08-02 | Gaseous detecting system that switches of sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205879891U true CN205879891U (en) | 2017-01-11 |
Family
ID=57701231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620826290.XU Active CN205879891U (en) | 2016-08-02 | 2016-08-02 | Gaseous detecting system that switches of sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205879891U (en) |
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2016
- 2016-08-02 CN CN201620826290.XU patent/CN205879891U/en active Active
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