Calibrating device for trace oxygen analyzer

Abstract

The utility model relates to the technical field of trace oxygen analyzer calibration, in particular to a trace oxygen analyzer calibration device which comprises a sampling assembly, a standard gas assembly and a zero gas assembly, the sampling assembly comprises a first switching valve, a standard gas access pipe, a zero gas access pipe, a gas detection pipe and an internal circulation deoxygenization mechanism; the first switching valve is provided with valve ports respectively connected with the standard gas access pipe, the zero gas access pipe and the gas detection pipe, and the first switching valve only can be communicated with the two valve ports at one time; the standard gas access pipe is connected with the standard gas assembly; the zero-point gas access pipe is connected with the zero-point gas assembly; a three-way valve is arranged at the gas outlet end of the gas detection pipe; the internal circulation deoxidizing mechanism comprises a deaerator and an air pump; a deaerator pipeline is connected with the standard gas inlet pipe and the gas inlet end of the gas pump, a gas outlet end pipeline of the gas pump is connected with the three-way valve, and the three-way valve can only be communicated with the two valve ports at a time. According to the utility model, the use of zero-point gas can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration of trace oxygen analyzers, and particularly relates to a calibration device for trace oxygen analyzers. Background Art

[0002] Trace oxygen analyzers are mainly used for measuring the trace oxygen content in gases produced and applied in fields such as chemistry, metallurgy, and the electronics industry. The measurement accuracy of such trace oxygen analyzers is particularly important and requires regular calibration. Currently, for the calibration of trace oxygen analyzers, the trace oxygen analyzer is connected to a gas sampling device. Then, zero gas (such as high-purity nitrogen) is first injected into the pipeline in the gas sampling device for pipeline purging to ensure as much as possible that there is no oxygen in the gas sampling device. Then, standard gas with a standard oxygen content is injected into the pipeline in the gas sampling device. Next, the trace oxygen analyzer detects the oxygen content. Finally, based on the oxygen content data measured by the trace oxygen analyzer and the oxygen content of the standard gas, it is compared to determine whether the accuracy of the trace oxygen analyzer is qualified. However, in the current detection method, to ensure that there is no oxygen in the gas sampling device, a large amount of zero gas needs to be injected. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: to provide a calibration device for a trace oxygen analyzer, which can reduce the use of zero gas and ensure the reliability of the verification of the trace oxygen analyzer.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a calibration device for a trace oxygen analyzer, including a sampling component, a standard gas component, and a zero gas component; the sampling component includes a first switching valve, a standard gas access pipe, a zero gas access pipe, a gas detection pipe, and an internal circulation deoxygenation mechanism; the first switching valve has valve ports respectively connected to the standard gas access pipe, the zero gas access pipe, and the gas detection pipe, and the first switching valve can only connect two valve ports at a time;

[0005] The standard gas access pipe is connected to the standard gas component;

[0006] The zero gas access pipe is connected to the zero gas component;

[0007] A three-way valve is arranged at the gas outlet end of the gas detection pipe;

[0008] The internal circulation deoxygenation mechanism includes a deoxygenator and an air pump; the pipeline of the deoxygenator is respectively connected to the standard gas access pipe and the intake end of the air pump, the outlet end pipeline of the air pump is connected to the three-way valve, and the three-way valve can only connect two valve ports at a time.

[0009] Further, the standard gas assembly includes a standard gas loading bottle and a standard gas valve; a standard gas valve is provided at the bottle mouth of the standard gas loading bottle, and the standard gas valve is connected to the standard gas access pipe through a pipeline.

[0010] The zero gas assembly includes a zero gas loading bottle and a zero gas valve; a zero gas valve is provided at the bottle mouth of the zero gas loading bottle, and the zero gas valve is connected to the zero gas access pipe through a pipeline.

[0011] Further, the micro-oxygen analyzer calibration device has at least two standard gas assemblies, and the sampling assembly further includes a second switching valve. The second switching valve has valve ports respectively connected to the standard gas access pipe and each standard gas assembly, and only two valve ports can be connected at a time for the second switching valve.

[0012] Further, the micro-oxygen analyzer calibration device has three standard gas assemblies, and the standard gas loading bottles of the three standard gas assemblies contain standard gases with different oxygen concentrations respectively.

[0013] Further, the standard gas assembly further includes a standard gas pressure regulator for adjusting the output gas pressure of the standard gas loading bottle.

[0014] The zero gas assembly further includes a zero gas pressure regulator for adjusting the output gas pressure of the zero gas loading bottle.

[0015] Further, the deoxidizer has a color-changing indicator.

[0016] The beneficial effects of the present utility model are as follows: During the calibration process of the micro-oxygen analyzer, the intake end of the micro-oxygen analyzer is connected to the gas detection tube. First, the first switching valve connects the zero gas access pipe to the gas detection tube, and the three-way valve connects the gas detection tube to the micro-oxygen analyzer. At this time, the zero gas assembly can directly inject high-purity nitrogen into the gas detection tube through the zero gas access pipe for purging; after purging for a certain period of time, then the first switching valve connects the gas detection tube to the standard gas access pipe, and the three-way valve connects the gas detection tube to the air pump of the in-circulation deoxidation mechanism. At this time, the air pump pumps the gas in the standard gas access pipe and the gas detection tube, and the deoxidizer is used to eliminate the oxygen in the standard gas access pipe and the residual oxygen in the gas detection tube. This not only reduces the emission of high-purity nitrogen from the zero gas assembly, but also can eliminate the oxygen in the sampling assembly to the greatest extent; finally, the three-way valve connects the gas detection tube to the micro-oxygen analyzer again. At this time, the standard gas assembly can inject the standard gas with a standard oxygen content into the gas detection tube through the standard gas access pipe, and then enter the micro-oxygen analyzer for measurement, so as to judge whether the measurement accuracy of the micro-oxygen analyzer meets the requirements. Description of the Drawings

[0017] Figure 1 This is a structural schematic diagram of a trace oxygen analyzer calibration device proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a sampling component of a trace oxygen analyzer calibration device proposed by the utility model;

[0019] Description of labels:

[0020] 1. Sampling assembly; 11. First switching valve; 12. Standard gas access pipe; 13. Zero gas access pipe; 14. Gas detection tube; 141. Three-way valve; 15. Internal circulation deoxidation mechanism; 151. Deaerator; 152. Air pump; 16. Second switching valve;

[0021] 2. Standard gas assembly; 21. Standard gas loading bottle; 22. Standard gas valve; 23. Standard gas pressure regulator;

[0022] 3. Zero gas assembly; 31. Zero gas loading bottle; 32. Zero gas valve; 33. Zero gas pressure regulator;

[0023] 4. Trace oxygen analyzer. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] Please refer to Figure 1 and Figure 2 As shown, the utility model is a trace oxygen analyzer calibration device, comprising a sampling assembly 1, a standard gas assembly 2 and a zero-point gas assembly 3; the sampling assembly 1 comprises a first switching valve 11, a standard gas access pipe 12, a zero-point gas access pipe 13, a gas detection pipe 14 and an internal circulation deoxygenation mechanism 15; the first switching valve 11 has valve ports connected to the standard gas access pipe 12, the zero-point gas access pipe 13 and the gas detection pipe 14 respectively, and the first switching valve 11 can only connect to two valve ports at a time;

[0026] The standard gas inlet pipe 12 is connected to the standard gas component 2;

[0027] The zero-point gas inlet pipe 13 is connected to the zero-point gas component 3;

[0028] The gas outlet end of the gas detection tube 14 is provided with a three-way valve 141;

[0029] The internal circulation deoxygenation mechanism 15 includes a deaerator 151 and an air pump 152; the pipelines of the deaerator 151 are respectively connected to the standard gas access pipe 12 and the intake end of the air pump 152, the outlet end pipeline of the air pump 152 is connected to the three-way valve 141, and only two valve ports can be connected by the three-way valve 141 at a time.

[0030] Working principle: During the calibration process of the trace oxygen analyzer 4, the intake end of the trace oxygen analyzer 4 is connected to the gas detection tube 14. First, the first switching valve 11 connects the zero gas access pipe 13 and the gas detection tube 14, and the three-way valve 141 connects the gas detection tube 14 and the trace oxygen analyzer 4. At this time, the zero gas assembly 3 can directly inject high-purity nitrogen into the gas detection tube 14 through the zero gas access pipe 13 for purging; after purging for a certain period of time, then the first switching valve 11 connects the gas detection tube 14 and the standard gas access pipe 12, and the three-way valve 141 connects the gas detection tube 14 and the air pump 152 of the internal circulation deoxygenation mechanism 15. At this time, the air pump 152 pumps the gas in the standard gas access pipe 12 and the gas detection tube 14, and uses the deaerator 151 to eliminate the oxygen in the standard gas access pipe 12 and the remaining oxygen in the gas detection tube 14, which not only reduces the emission of high-purity nitrogen discharged by the zero gas assembly 3, but also can eliminate the oxygen in the sampling assembly 1 to the greatest extent; finally, the three-way valve 141 connects the gas detection tube 14 and the trace oxygen analyzer 4 again. At this time, the standard gas assembly 2 can inject the standard gas with a standard oxygen content into the gas detection tube 14 through the standard gas access pipe 12, and then enter the trace oxygen analyzer 4 for measurement, so as to judge whether the measurement accuracy of the trace oxygen analyzer 4 meets the requirements.

[0031] Please refer to Figure 1 and Figure 2 As shown, further, the standard gas assembly 2 includes a standard gas loading bottle 21 and a standard gas valve 22; a standard gas valve 22 is provided at the bottle mouth of the standard gas loading bottle 21, and the pipeline of the standard gas valve 22 is connected to the standard gas access pipe 12;

[0032] The zero gas assembly 3 includes a zero gas loading bottle 31 and a zero gas valve 32; a zero gas valve 32 is provided at the bottle mouth of the zero gas loading bottle 31, and the pipeline of the zero gas valve 32 is connected to the zero gas access pipe 13.

[0033] As can be seen from the above description, the standard gas loading bottle 21 loads the standard gas with a standard oxygen content, and the standard gas valve 22 controls the output of the standard gas and enters the sampling assembly 1;

[0034] The zero gas loading bottle 31 loads high-purity nitrogen, and the zero gas valve 32 controls the output of high-purity nitrogen and enters the sampling assembly 1.

[0035] Please refer to Figure 1 As shown, further, the trace oxygen analyzer calibration device has at least two standard gas assemblies 2, and the sampling assembly 1 further includes a second switching valve 16. The second switching valve 16 has valve ports respectively connected to the standard gas access pipe 12 and each standard gas assembly 2, and the second switching valve 16 can only connect two valve ports at a time.

[0036] As can be seen from the above description, preferably, the trace oxygen analyzer calibration device has three standard gas assemblies 2, and the standard gas loading bottles 21 of the three standard gas assemblies 2 contain standard gases with different oxygen concentrations. Using three groups of standard gases with different oxygen concentrations to test the trace oxygen analyzer 4 can ensure the reliability of the verification of the trace oxygen analyzer 4.

[0037] Please refer to Figure 1 As shown, further, the standard gas assembly 2 further includes a standard gas pressure regulator 23 for adjusting the output gas pressure of the standard gas loading bottle 21;

[0038] The zero gas assembly 3 further includes a zero gas pressure regulator 33 for adjusting the output gas pressure of the zero gas loading bottle 31.

[0039] As can be seen from the above description, the standard gas pressure regulator 23 can adjust the output pressure of the standard gas with a standard oxygen content, and the zero gas pressure regulator 33 can increase the output pressure of pure nitrogen.

[0040] Further, the deoxidizer 151 has a color-changing indicator (not shown in the figure).

[0041] As can be seen from the above description, since the deoxidizer 151 has a color-changing indicator, it can display the remaining service life of the deoxidizer in the deoxidizer 151 in real time.

[0042] Embodiment 1

[0043] A trace oxygen analyzer calibration device, please refer to Figure 1 and Figure 2As shown in the figure, it includes a sampling component 1, three standard gas components 2 and a zero gas component 3; the sampling component 1 includes a first switching valve 11, a standard gas access pipe 12, a zero gas access pipe 13, a gas detection pipe 14 and an internal circulation deoxygenation mechanism 15; the first switching valve 11 has valve ports respectively connected to the standard gas access pipe 12, the zero gas access pipe 13 and the gas detection pipe 14, and the first switching valve 11 can only connect two valve ports at a time; the standard gas access pipe 12 is connected to the standard gas component 2; the zero gas access pipe 13 is connected to the zero gas component 3; a three-way valve 141 is arranged at the outlet end of the gas detection pipe 14; the internal circulation deoxygenation mechanism 15 includes a deaerator 151 and an air pump 152; the pipeline of the deaerator 151 is respectively connected to the standard gas access pipe 12 and the inlet end of the air pump 152, the outlet end pipeline of the air pump 152 is connected to the three-way valve 141, and the three-way valve 141 can only connect two valve ports at a time. The three standard gas components 2 can respectively output standard gases with different oxygen concentrations.

[0044] Working principle: During the calibration process of the trace oxygen analyzer 4, the inlet end of the trace oxygen analyzer 4 is connected to the gas detection pipe 14. First, the first switching valve 11 connects the zero gas access pipe 13 and the gas detection pipe 14, and the three-way valve 141 connects the gas detection pipe 14 and the trace oxygen analyzer 4. At this time, the zero gas component 3 can directly inject high-purity nitrogen into the gas detection pipe 14 through the zero gas access pipe 13 for purging; after purging for a certain period of time, then the first switching valve 11 connects the gas detection pipe 14 and the standard gas access pipe 12, and the three-way valve 141 connects the gas detection pipe 14 and the air pump 152 of the internal circulation deoxygenation mechanism 15. At this time, the air pump 152 pumps the gas in the standard gas access pipe 12 and the gas detection pipe 14, and the deaerator 151 eliminates the oxygen in the standard gas access pipe 12 and the remaining oxygen in the gas detection pipe 14, which not only reduces the emission of high-purity nitrogen discharged by the zero gas component 3, but also can eliminate the oxygen in the sampling component 1 to the greatest extent; finally, the three-way valve 141 connects the gas detection pipe 14 and the trace oxygen analyzer 4 again. At this time, one of the standard gas components 2 can inject the standard gas with a standard oxygen content into the gas detection pipe 14 through the standard gas access pipe 12, and then enter the trace oxygen analyzer 4 for measurement. Taking this as a cycle, the standard gas detections with different standard oxygen contents are carried out respectively, so as to judge whether the measurement accuracy of the trace oxygen analyzer 4 meets the requirements.

[0045] Embodiment 2

[0046] In this embodiment, the structures of the standard gas component 2 and the zero gas component 3 are further defined on the basis of Embodiment 1, as follows:

[0047] Please refer to Figure 1As shown in the figure, the standard gas assembly 2 includes a standard gas loading bottle 21, a standard gas valve 22, and a standard gas pressure regulator 23 for adjusting the output gas pressure of the standard gas loading bottle 21; a standard gas valve 22 is provided at the bottle mouth of the standard gas loading bottle 21, and the standard gas valve 22 is connected to the standard gas access pipe 12 through a pipeline; the zero gas assembly 3 includes a zero gas loading bottle 31, a zero gas valve 32, and a zero gas pressure regulator 33 for adjusting the output gas pressure of the zero gas loading bottle 31; a zero gas valve 32 is provided at the bottle mouth of the zero gas loading bottle 31, and the zero gas valve 32 is connected to the zero gas access pipe 13 through a pipeline.

[0048] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A calibration device for a trace oxygen analyzer, characterized in that: It includes a sampling assembly, a standard gas assembly and a zero-point gas assembly; the sampling assembly includes a first switching valve, a standard gas access pipe, a zero-point gas access pipe, a gas detection pipe and an internal circulation deoxygenation mechanism; the first switching valve has valve ports connected to the standard gas access pipe, the zero-point gas access pipe and the gas detection pipe respectively, and the first switching valve can only be connected to two valve ports at a time; The standard gas access pipe is connected to the standard gas component; The zero-point gas inlet pipe is connected to the zero-point gas assembly; The gas outlet end of the gas detection tube is provided with a three-way valve; The internal circulation deoxygenation mechanism includes a deaerator and an air pump; the deaerator pipeline is respectively connected to the standard gas access pipe and the air inlet end of the air pump, the air outlet end pipeline of the air pump is connected to a three-way valve, and the three-way valve can only connect two valve ports at a time.

2. The micro-oxygen analyzer calibration device according to claim 1, characterized in that: The standard gas assembly comprises a standard gas loading bottle and a standard gas valve; the bottle mouth of the standard gas loading bottle is provided with a standard gas valve, and the standard gas valve pipeline is connected to the standard gas access pipe; The zero-point gas component comprises a zero-point gas loading bottle and a zero-point gas valve; the bottle mouth of the zero-point gas loading bottle is provided with a zero-point gas valve, and the zero-point gas valve pipeline is connected to the zero-point gas access pipe.

3. The calibration device for trace oxygen analyzer according to claim 2, characterized in that: The trace oxygen analyzer calibration device has at least two standard gas components, and the sampling component also includes a second switching valve, which has valve ports respectively connected to the standard gas access pipe and each standard gas component, and the second switching valve can only connect two valve ports at a time.

4. The micro-oxygen analyzer calibration device according to claim 3, characterized in that: The trace oxygen analyzer calibration device comprises three standard gas components, and the standard gas loading bottles of the three standard gas components respectively contain standard gases with different oxygen concentrations.

5. The micro-oxygen analyzer calibration device according to claim 2, characterized in that: The standard gas assembly also includes a standard gas pressure regulator for regulating the output gas pressure of the standard gas loading bottle; The zero gas assembly also includes a zero gas pressure regulator for adjusting the gas pressure output from the zero gas loading bottle.

6. The calibration device for a trace oxygen analyzer according to claim 1, characterized in that: The deaerator has a color changing indicator.

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