CN207764024U - A kind of secondary gas sample dilution device - Google Patents
A kind of secondary gas sample dilution device Download PDFInfo
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- CN207764024U CN207764024U CN201721694680.7U CN201721694680U CN207764024U CN 207764024 U CN207764024 U CN 207764024U CN 201721694680 U CN201721694680 U CN 201721694680U CN 207764024 U CN207764024 U CN 207764024U
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Abstract
The utility model discloses a kind of secondary gas sample dilution devices.The utility model device includes：The compositions such as high-pressure cylinder, mass flowmenter, mixer, mass flow control system, computer, threeway, throttle valve.The mass flowmenter dilute sample gaseous sample that this method is controlled by computer.The device includes two-stage dilution, every grade can sample dilute 1000 times, 1,000,000 times can be diluted to sample altogether.The device can be used for the dilution of calibrating gas, a series of gas of concentration be obtained, for making calibration curve, it can also be used to which the sample gas of diluting high-concentration meets needs of the analytical instrument to various concentration sample analysis.
Description
Technical field
The present invention relates to a kind of dilution devices of gaseous sample.This patent discusses the composition, construction, user of the device
The contents such as method.Maximum of the present invention can dilute 1,000,000 times.The device can be used for the dilution of calibrating gas, obtain a series of concentration
Gas, for making calibration curve, it can also be used to which the sample gas of diluting high-concentration meets analytical instrument to various concentration sample
The needs of analysis.
Background technology
With the development of science and technology, contemporary analysis means and instrument and equipment are more automated, intelligent.Nevertheless, existing
The calibration of various analysis methods still be unable to do without cyclinder gas, and required concentration is totally different, occupies a large amount of steel cylinder and storage
Space, maintenance cost are larger.Since the service life of gas is shorter, primary calibration needs the gas of series concentration, but uses gas
The scale of construction is less, causes the utilization also not yet in effect of a large amount of standard gas just out of date, is wasted to human and material resources, financial resources very big.Steel cylinder gas one
As be all high pressure gas, be higher than standard atmospheric pressure several times, security risk is very big.Therefore, a large amount of cyclinder gas is relied solely on
It is difficult to meet current today's society and the needs of scientific development.
Currently, have the dilution equipment of some commercializations on domestic and international market, but extension rate is limited, after dilution for many times
Precision is difficult to ensure, and higher operating costs.The development of Modern Methods still needs to a set of accurate, stable, high magnification numbe gas
Body sample dilution device.
Therefore, the present apparatus designs a kind of secondary gas sample dilution device, reduces the usage quantity of steel cylinder gas, increases dilution
Multiple meets needs of the modern experimental analysis to a variety of concentration gases.
Invention content
A kind of secondary gas sample dilution device
Present apparatus technical solution is as follows：
The gas outlet of high-pressure cylinder passes through the four fluorine tube air inlet with the first mass flowmenter and the 4th mass flowmenter respectively
Mouth is connected, and standard gas bottle is connected with the air intake of the second mass flowmenter, the gas outlet of the first mass flowmenter and the second quality stream
The gas outlet of gauge is connected with the air intake of the first mixer, the outlet of the first mixer respectively with throttle valve and third quality
The air inlet of flowmeter is connected, and third mass flowmenter is discharged by required flow gas sample, extra gas by throttle valve,
The gas outlet of third mass flowmenter is connected with the air intake of the second mixer with the gas outlet of the 4th mass flowmenter, and second
The gas outlet of mixer is connected with threeway air inlet, and analytical instrument acquires required sample from a gas outlet of threeway, extra
Gaseous sample by threeway another gas outlet be discharged.
Mass flow control system by signal wire respectively with the first mass flowmenter, the second mass flowmenter, third matter
Amount flowmeter, the 4th mass flowmenter is connected and computer；
First mass flowmenter, the second mass flowmenter, third mass flowmenter, the 4th mass flowmenter are respectively by leading
Line is connected through mass flow control system with computer, by Computer display and controls the flow of each mass flowmenter.
The range of first mass flowmenter and third mass flowmenter is in 0-50mL/min, the second mass flowmenter and the 4th
The range of mass flowmenter is in 0-5000mL/min, and the precision of mass flowmenter is within ± 1%, response time ＜ 4s, pressure resistance
Value ＞ 10Mpa.
The gas outlet of first mass flowmenter synthesizes all the way with the gas outlet of the second mass flowmenter, and with the first mixer
(4) air intake is connected, and forms level-one dilution；Gas supply secondary dilution after dilution uses, and extra gas is by throttle valve
(12) it is discharged.
The gas outlet of third mass flowmenter synthesized with the gas outlet of the 4th mass flowmenter all the way with the second mixer
Air intake is connected, and forms secondary dilution.
Carrier gas is provided by high-pressure cylinder, and aerochemistry composition can be cleaned air, high pure nitrogen or certain other institute
The inert gas needed.
Sample gas is provided by standard gas bottle, the interior high pressure mixing gas containing high pressure sample pure gas or a certain concentration.
Advantages of the present invention is as follows：
1. the present apparatus uses two-stage dilution, dilution times is higher, up to 1,000,000 times.
2. adopting the high-precision computerizedd control, highly sensitive mass flowmenter, it is high, more stable to prepare more precision.
3. the present apparatus is easy to operate, relatively low to the requirement of operating personnel's professional standards, easy to utilize.
Description of the drawings
Fig. 1 is a kind of secondary gas sample dilution device figure, wherein 1 is high-pressure cylinder, and 2 be the first mass flowmenter, 3
It is the first mixer for the second mass flowmenter, 4,5 be third mass flowmenter, and 6 be the 4th mass flowmenter, and 7 be standard gas bottle,
8 be mass flow control system, and 9 be computer, and 10 be the second mixer, 11 be threeway, 12 is throttle valve.
Specific implementation mode
The use that the following examples illustrate the invention, but the application range is not limited.
Embodiment 1
When a kind of secondary gas sample dilution device operation, when the flow that level-one dilutes the first mass flowmenter 2 is set as
5ml/min, the second mass flowmenter 3 are set as 4995ml/min, and third mass flowmenter 5 is set as 5ml/min, the 4th mass flow
When meter is set as 4995ml/min, the gaseous sample of output has diluted 1,000,000 times
Embodiment 2
When the flow that level-one dilutes the first mass flowmenter 2 is set as 5ml/min, the second mass flowmenter 3 is set as 995ml/
Min, third mass flowmenter 5 are set as cleaning state, i.e. gas directly passes through, when the 4th mass flowmenter 6 is set as 0ml/min,
The gaseous sample of output has diluted 200 times.
Embodiment 3
When the flow that level-one dilutes the first mass flowmenter 2 is set as 50ml/min, the second mass flowmenter 3 is set as 50ml/
Min, third mass flowmenter 5 are set as cleaning state, i.e. gas directly passes through, when the 4th mass flowmenter 6 is set as 0ml/min,
The gaseous sample of output has diluted 2 times.
Claims (4)
1. a kind of secondary gas sample dilution device, it is characterised in that：
Device is high-pressure cylinder（1）, the first mass flowmenter（2）, the second mass flowmenter（3）, the first mixer（4）, third
Mass flowmenter（5）, the 4th mass flowmenter（6）, standard gas bottle（7）, the second mixer（10）, threeway（11）, throttle valve（12）
Composition；Device further includes mass flow control system（8）；
High-pressure cylinder（1）Gas outlet by four fluorine tube respectively with the first mass flowmenter（2）With the 4th mass flowmenter（6）'s
Air inlet is connected, standard gas bottle（7）With the second mass flowmenter（3）Air intake be connected, the first mass flowmenter（2）Gas outlet
With the second mass flowmenter（3）Gas outlet with the first mixer（4）Air intake be connected, the first mixer（4）Outlet
Respectively with throttle valve（12）With third mass flowmenter（5）Air inlet be connected, third mass flowmenter（5）Pass through required flow
Gaseous sample, extra gas is by throttle valve（12）Discharge, third mass flowmenter（5）Gas outlet and the 4th mass flowmenter
（6）Gas outlet with the second mixer（10）Air intake be connected, the second mixer（10）Gas outlet and threeway（11）Into
Gas port is connected, and analytical instrument is from threeway（11）A gas outlet in acquire needed for sample, extra gaseous sample is by threeway
（11）Another gas outlet discharge；
The dilution mode of the device is secondary dilution；The control of gas flow is realized by four mass flowmenters；
Mass flow control system（8）By signal wire respectively with the first mass flowmenter（2）, the second mass flowmenter（3）,
Three mass flowmenters（5）, the 4th mass flowmenter（6）Connected and computer（9）；
First mass flowmenter（2）, the second mass flowmenter（3）, third mass flowmenter（5）, the 4th mass flowmenter（6）Point
Not by conducting wire through mass flow control system（8）With computer（9）It is connected, by computer（9）It shows and controls each quality stream
The flow of gauge；First mass flowmenter（2）Gas outlet and the second mass flowmenter（3）Gas outlet synthesis all the way, and with
First mixer（4）Air intake be connected, formed level-one dilution；Gas supply secondary dilution after dilution uses, extra gas
Body is by throttle valve（12）Discharge；
Third mass flowmenter（5）Gas outlet and the 4th mass flowmenter（6）Gas outlet synthesis all the way with the second mixer
（10）Air intake be connected, formed secondary dilution.
2. a kind of secondary gas sample dilution device according to claim 1, it is characterised in that：First mass flowmenter
（2）With third mass flowmenter（5）Range in 0-50 mL/min, the second mass flowmenter（3）With the 4th mass flowmenter
（6）Range in 0-5000 mL/min, the precision of mass flowmenter is within ± 1%, response time ＜ 4s, pressure voltage ＞ 10
Mpa。
3. a kind of secondary gas sample dilution device according to claim 1, it is characterised in that：Carrier gas is by high-pressure cylinder
（1）It provides, aerochemistry group becomes cleaned air, high pure nitrogen.
4. a kind of secondary gas sample dilution device according to claim 1, it is characterised in that：Sample gas is by standard gas bottle
（7）It provides, the interior high pressure mixing gas containing high pressure sample pure gas or a certain concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721694680.7U CN207764024U (en) | 2017-12-08 | 2017-12-08 | A kind of secondary gas sample dilution device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721694680.7U CN207764024U (en) | 2017-12-08 | 2017-12-08 | A kind of secondary gas sample dilution device |
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| Publication Number | Publication Date |
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| CN207764024U true CN207764024U (en) | 2018-08-24 |
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| CN201721694680.7U Active CN207764024U (en) | 2017-12-08 | 2017-12-08 | A kind of secondary gas sample dilution device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220694A (en) * | 2018-11-27 | 2020-06-02 | 中国科学院大连化学物理研究所 | Mass spectrometry device and method for wide concentration range online monitoring |
-
2017
- 2017-12-08 CN CN201721694680.7U patent/CN207764024U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220694A (en) * | 2018-11-27 | 2020-06-02 | 中国科学院大连化学物理研究所 | Mass spectrometry device and method for wide concentration range online monitoring |
| CN111220694B (en) * | 2018-11-27 | 2021-09-28 | 中国科学院大连化学物理研究所 | Mass spectrometry device and method for wide concentration range online monitoring |
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