CN211263289U - Trace oxygen analyzer calibrating device - Google Patents
Trace oxygen analyzer calibrating device Download PDFInfo
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- CN211263289U CN211263289U CN201922218069.2U CN201922218069U CN211263289U CN 211263289 U CN211263289 U CN 211263289U CN 201922218069 U CN201922218069 U CN 201922218069U CN 211263289 U CN211263289 U CN 211263289U
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Abstract
The utility model discloses a trace oxygen analysis appearance calibrating installation, wherein, include valve device, vacuum pump, be used for the access to sweep the standard gas branch road that dilutes the branch road and be used for accessing trace oxygen standard gas that sweeps, it passes through to sweep dilutes branch road and standard gas branch road valve device is connected to trace oxygen analysis appearance, and it passes through to sweep dilutes branch road and standard gas branch road valve device is connected to the vacuum pump, it is provided with first flow control device on the road to sweep and dilute, standard gas is provided with second flow control device on the road. This trace oxygen analysis appearance calibrating installation aims at solving prior art and sweeps the time long, cause gaseous extravagant many, detect inconvenient technical problem when trace oxygen analysis appearance is examined and determine.
Description
Technical Field
The utility model relates to a trace oxygen analysis appearance examination technical field especially relates to a trace oxygen analysis appearance calibrating installation.
Background
The trace oxygen analyzer is widely used for analyzing trace oxygen (the oxygen concentration is 0.1ppm to 1000ppm) in nitrogen and inert gases such as electrons, new materials, mechanical manufacturing, nonferrous metallurgy, industrial gases and the like. The trace oxygen analyzer mostly adopts an electrochemical principle, and can be divided into a primary cell type (fuel cell and Hertz cell), a solid electrolyte concentration cell type (zirconia cell and variable-frequency limiting current cell), a constant potential electrolysis type, a polarization voltage type (coulomb electricity quantity and polarographic detection type) and other detection units according to different signal generation modes of electrochemical reaction (the trace oxygen analyzer is called as a trace oxygen analyzer for short). According to the application, the device can be divided into three types, namely a portable type, a laboratory type and an online type. The oxygen sensor mainly comprises an electrochemical oxygen sensor, a gas circuit unit and an electronic display unit. The gas sampling method includes a positive pressure conveying type and a pump suction type.
At present, most of trace oxygen analyzers, including domestic and imported similar instruments, require long balancing time during verification, and are particularly not favorable for the development of verification work under the condition of low content. The trace oxygen analyzer with a small amount of inlets is improved in the aspects of deoxidation and zero point reduction, so that the balance time of the trace oxygen analyzer can be obviously shortened. For the calibration items of indicating value error, repeatability, zero drift and range drift, the current calibration steps are approximately as follows:
1) connecting a high-purity nitrogen bottle to a ventilation inlet of a trace oxygen analyzer through a pressure reducing valve, purging the whole gas circuit after the instrument is started up at a proper pressure and flow rate, and checking whether the gas circuit leaks or not;
2) the micro oxygen standard gas with different concentrations is introduced, if the detection is complete, the time of front and back balance is very long, the reliability of the detection result is poor, the gas is very wasted, and the cost is high.
The traditional method has the following problems: (1) the purging time is too long, particularly for domestic equipment; (2) the purging gas and the standard gas are wasted, and the detection cost is high; (3) the influence of environmental conditions is large, and various gas standard substances are required to be carried, so that the detection is inconvenient.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Based on this, the utility model provides a trace oxygen analysis appearance calibrating installation, this trace oxygen analysis appearance calibrating installation aim at solving prior art and sweep the time long, cause gaseous extravagant many, detect inconvenient technical problem when trace oxygen analysis appearance is examined and determine.
(II) technical scheme
For solving the technical problem, the utility model provides a trace oxygen analysis appearance calibrating installation, wherein, include valve gear, vacuum pump, be used for the access to sweep the standard gas branch road that dilutes the branch road and be used for inserting trace oxygen standard gas that sweeps of dilutent gas, sweep and dilute branch road and standard gas branch road and pass through valve gear is connected to trace oxygen analysis appearance, and it passes through to sweep dilutent branch road and standard gas branch road valve gear is connected to the vacuum pump, it is provided with first flow control device on the road to sweep and dilute, standard gas is provided with second flow control device on the road.
Preferably, a first pressure reducing valve is arranged on the purging dilution branch, and a second pressure reducing valve is arranged on the standard gas branch.
Preferably, first flow control device is first high accuracy mass flow meter, second flow control device is the high accuracy mass flow meter of second, first high accuracy mass flow meter is connected the valve device with between the first relief pressure valve, the high accuracy mass flow meter of second is connected the valve device with between the second relief pressure valve, trace oxygen analyzer calibrating installation is still including the mixing tank that has the valve, the mixing tank sets up on the pipeline between deoxidation device and the valve device and set up on the pipeline between second flow control device and the valve device.
Preferably, still be provided with dewatering device and deoxidation device on the dilution branch of sweeping, first relief pressure valve, first high accuracy mass flow meter, dewatering device, deoxidation device and valve device connect gradually.
Preferably, the valve device is a four-way valve.
Preferably, the purging dilution branch is connected to a high-purity nitrogen gas cylinder.
(III) advantageous effects
The utility model discloses compare with prior art, the beneficial effects of the utility model include:
in the trace oxygen analyzer calibration device, the purging dilution branch and the standard gas branch are connected to the trace oxygen analyzer through the valve device, the purging dilution branch and the standard gas branch are connected to the vacuum pump through the valve device, the purging dilution branch is provided with the first flow control device, and the standard gas branch is provided with the second flow control device, so that on one hand, the purging dilution branch, the standard gas branch and other pipelines can be vacuumized through the vacuum pump, air components are removed, the influence of oxygen in the air is reduced, and subsequent rapid purging is promoted; on the other hand, through the control of first flow control device and second flow control device, realize the required standard gas concentration of arbitrary adjustment of the dilution to standard gas, reduce standard gas consumption, and need not to readjust the gas circuit in the verification process, connect the gas cylinder in addition, need not to carry multiple standard gas, in addition, also reduced the waste to sweeping gas and standard gas, improved verification work efficiency, use manpower sparingly and detection cost.
Other advantageous effects of the present invention will be described in the following embodiments one by one.
Drawings
The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:
fig. 1 is a schematic diagram of a trace oxygen analyzer calibrating device according to an embodiment of the present invention.
Description of reference numerals:
1. the device comprises a valve device, a vacuum pump, a purging and diluting branch, a standard gas branch, a standard mother gas bottle, a high-purity nitrogen bottle, a micro-oxygen analyzer, a first flow control device, a second flow control device, a first pressure reducing valve, a second pressure reducing valve, a dehydration device, a deoxidation device, a mixing tank and a second pressure reducing valve, wherein the valve device comprises a valve device 2, a vacuum pump, a purging and diluting branch, a standard gas branch, a standard mother gas bottle 5, a standard mother gas bottle 6, a high-purity nitrogen bottle 7.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
Referring to fig. 1, the utility model discloses a trace oxygen analyzer 7 calibrating device, which comprises a valve device 1, a vacuum pump 2, a purging dilution branch 3 for accessing purging diluent gas and a standard gas branch 4 for accessing trace oxygen standard gas (which can be connected to a standard mother gas bottle 5), wherein the purging dilution branch 3 can be connected to a high-purity nitrogen gas bottle 6, high-purity nitrogen gas is used as purging diluent gas, however, the present invention is not limited thereto, and other suitable purge diluent gas may be adopted, and the purge diluent branch 3 and the standard gas branch 4 are connected to the micro oxygen analyzer 7 through the valve device 1, and the purging dilution branch 3 and the standard gas branch 4 are connected to the vacuum pump 2 through the valve device 1, a first flow control device 8 is arranged on the purging dilution branch 3, and a second flow control device 9 is arranged on the standard gas branch 4.
As mentioned above, in the trace oxygen analyzer 7 calibration device, the purging dilution branch 3 and the standard gas branch 4 are connected to the trace oxygen analyzer 7 through the valve device 1, the purging dilution branch 3 and the standard gas branch 4 are connected to the vacuum pump 2 through the valve device 1, the first flow control device 8 is arranged on the purging dilution branch 3, and the second flow control device 9 is arranged on the standard gas branch 4, so that on one hand, the vacuum pump 2 can be used for vacuumizing the pipelines such as the purging dilution branch 3 and the standard gas branch 4, and air components are removed, and the influence of oxygen in the air is reduced, thereby promoting the subsequent rapid purging; on the other hand, through the control of first flow control device 8 and second flow control device 9, realize the required standard gas concentration of arbitrary adjustment of the dilution of standard gas, reduce standard gas consumption, and need not to readjust the gas circuit in the verification process, connect the gas cylinder in addition, need not to carry multiple standard gas, in addition, also reduced the waste to sweeping gas and standard gas, improved verification work efficiency, use manpower sparingly and detection cost.
Of course, the above mentioned valve device 1 is preferably a four-way valve, and four ports of the four-way valve are respectively connected to the vacuum pump 2, the purging dilution branch 3, the standard gas branch 4 and the trace oxygen analyzer 7, and the present invention is not limited thereto, and the valve device 1 may also be a valve of various appropriate types of gas.
According to the utility model discloses a specific embodiment sweeps and is provided with first relief pressure valve 10 on diluting branch road 3, is provided with second relief pressure valve 11 on the standard gas branch road 4. The first flow rate control device 8 is a first high-precision mass flowmeter, the second flow rate control device 9 is a second high-precision mass flowmeter, the first high-precision mass flowmeter is connected between the valve device 1 and the first pressure reducing valve 10, and the second high-precision mass flowmeter is connected between the valve device 1 and the second pressure reducing valve 11. Still be provided with dewatering device 12 and deoxidation device 13 on the dilution branch road 3 sweeps, first relief pressure valve 10, a high accuracy mass flowmeter, dewatering device 12, deoxidation device 13 and valve device 1 connect gradually, trace oxygen analyzer calibrating installation is still including the mixing tank 14 that has the valve, mixing tank 14 sets up on the pipeline between deoxidation device 13 and valve device 1 and set up on the pipeline between second flow control device 9 and valve device 1, mixing tank 14 is used for holding polytetrafluoroethylene or similar material, make the gaseous intensive mixing of diluent.
The working principle of the micro oxygen analyzer 7 calibrating device provided by the utility model is described below with reference to the above specific embodiments:
(1) respectively opening a first pressure reducing valve 10 and a second pressure reducing valve 11 to enable the purging dilution branch 3 and the standard gas branch 4 to be filled with respective gas, and then closing the first pressure reducing valve 10 and the second pressure reducing valve 11;
(2) opening the four-way valve, respectively pumping out gas in a gas path among the trace oxygen analyzer 7, the purging dilution branch 3, the standard gas branch 4 and the four-way valve by using the vacuum pump 2, reducing the influence of oxygen in pipeline gas and ambient air on a measurement gas path, judging the gas tightness of the gas path through gas pressure variation, judging whether leakage exists or not, if leakage exists, adopting corresponding measures to ensure good gas tightness and then operating, and if no leakage exists, continuing the following operation;
(3) the first pressure reducing valve 10 is opened, nitrogen is introduced, and the nitrogen enters the trace oxygen analyzer 7 through dehydration and deoxidation, so that the purpose of rapid purging is achieved, and the matching of gas flow and pressure is noticed, which is related to the conditions recommended by the analyzer. After the balance is achieved, a zero drift item can be detected;
(4) the flow of the dilution gas is gradually reduced through the first high-precision mass flow meter, the flow of the standard gas is adjusted through the second high-precision mass flow meter, and the flow setting proportion is determined according to the target dilution concentration.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (6)
1. The utility model provides a trace oxygen analysis appearance calibrating installation, its characterized in that includes valve device, vacuum pump, is used for the access to sweep the standard gas branch road that sweeps the dilution branch road and be used for accessing trace oxygen standard gas of diluent gas, it passes through to sweep dilution branch road and standard gas branch road valve device is connected to trace oxygen analysis appearance, and it passes through to sweep dilution branch road and standard gas branch road valve device is connected to the vacuum pump, it is provided with first flow control device on the dilution branch road to sweep, be provided with second flow control device on the standard gas branch road.
2. The calibrating apparatus for trace oxygen analyzer according to claim 1, wherein a first pressure reducing valve is disposed on the purge dilution branch, and a second pressure reducing valve is disposed on the standard gas branch.
3. The trace oxygen analyzer calibration device according to claim 2, wherein the first flow control device is a first high-precision mass flow meter, the second flow control device is a second high-precision mass flow meter, the first high-precision mass flow meter is connected between the valve device and the first pressure reducing valve, and the second high-precision mass flow meter is connected between the valve device and the second pressure reducing valve.
4. The trace oxygen analyzer calibrating device according to claim 3, wherein a dehydration device and a deoxidation device are further arranged on the purging dilution branch, the first pressure reducing valve, the first high-precision mass flow meter, the dehydration device, the deoxidation device and the valve device are sequentially connected, the trace oxygen analyzer calibrating device further comprises a mixing tank with a valve, and the mixing tank is arranged on a pipeline between the deoxidation device and the valve device and on a pipeline between the second flow control device and the valve device.
5. The calibrating apparatus for a trace oxygen analyzer according to any one of claims 1 to 4, wherein the valve device is a four-way valve.
6. The trace oxygen analyzer calibrating device according to any one of claims 1 to 4, wherein the purging dilution branch is connected to a high-purity nitrogen gas cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218069.2U CN211263289U (en) | 2019-12-12 | 2019-12-12 | Trace oxygen analyzer calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922218069.2U CN211263289U (en) | 2019-12-12 | 2019-12-12 | Trace oxygen analyzer calibrating device |
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| CN211263289U true CN211263289U (en) | 2020-08-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007204A (en) * | 2019-12-23 | 2020-04-14 | 中国人民解放军92609部队 | Gas analysis verification equipment |
| CN114778197A (en) * | 2022-03-31 | 2022-07-22 | 中国船舶重工集团公司第七一八研究所 | Analyzer sampling system with shutdown protection function |
-
2019
- 2019-12-12 CN CN201922218069.2U patent/CN211263289U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007204A (en) * | 2019-12-23 | 2020-04-14 | 中国人民解放军92609部队 | Gas analysis verification equipment |
| CN114778197A (en) * | 2022-03-31 | 2022-07-22 | 中国船舶重工集团公司第七一八研究所 | Analyzer sampling system with shutdown protection function |
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