Automatic detection device of trace oxygen analyzer

Abstract

The utility model provides an automatic detection device of a trace oxygen analyzer. The automatic detection device comprises a gas storage unit, a flow control unit, a busbar unit, a standard gas output unit and a controller, the gas storage unit comprises at least eight gas storage bottles, and the concentration of standard gas in different gas storage bottles is different. The detection device respectively controls automatic switching of standard gases with corresponding concentrations through different flow control branches. The mass flow meter and the rotor flow meter are installed on the output pipeline, the mass flow meter can provide accurate mass flow information, the rotor flow meter can provide real-time volume flow data, and the flow state of fluid can be reflected more accurately through combination of the mass flow meter and the rotor flow meter. According to the detection device, the detected instrument can be ventilated according to the set detection points and the ventilation sequence, standard gases with different concentrations are automatically switched after the previous concentration determination is finished, and the standard gases are automatically cut off after the whole experiment process is finished, so that the automation of the detection process is realized, and the detection efficiency of the trace oxygen analyzer can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement and detection, in particular to an automatic detection device for a trace oxygen analyzer. Background Art

[0002] Trace oxygen analyzers are mainly divided into two types: electrochemical principle and zirconia principle. The instrument is usually composed of an oxygen sensor, a gas path unit and an electronic display unit. It is used in electronics, metallurgy, air separation, chemical industry and other fields. It has a wide range of applications and is used to detect oxygen concentration analysis of 0 to 1000 μmol / mol. According to the calibration procedures, the calibration cycle of the instrument is one year.

[0003] In the traditional detection process of trace oxygen analyzers, manual operation is adopted, which requires manual operation of various valves. The dead zone is very large, and the gas cylinder needs to be replaced when switching the concentration point, which will mix with air, causing the instrument to need secondary purge, which prolongs the calibration time of the instrument. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide an automatic detection device for a trace oxygen analyzer.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model to solve its technical problem is: an automatic detection device for a trace oxygen analyzer, including a gas storage unit, a flow control unit, a bus unit, a standard gas output unit and a controller;

[0006] The gas storage unit includes at least 8 gas cylinders, wherein standard gas is stored in the gas cylinders, and the concentration of the standard gas in different gas cylinders is different;

[0007] The flow control unit includes at least 8 flow control branches, the air inlet end of one of the flow control branches is connected to a gas storage bottle, and each of the flow control branches is sequentially installed with a first pressure gauge, a pressure regulating valve, a second pressure gauge, a needle valve and a first electric ball valve from the air inlet end to the air outlet end;

[0008] The busbar unit comprises a busbar, and the gas outlet end of each of the flow control branches is connected to the busbar;

[0009] The standard gas output unit comprises an output pipeline, a mass flow meter and a rotor flow meter are installed on the output pipeline, and a gas interface is installed at the gas outlet end of the output pipeline;

[0010] The first electric ball valve on each flow control branch and the mass flow meter and rotor flow meter on the output pipeline are all connected to the controller signal.

[0011] The detection device of the utility model is provided with a plurality of standard gas storage cylinders with different concentrations, and the automatic switching of the standard gases of corresponding concentrations is controlled respectively through different flow control branches. A mass flow meter and a rotor flow meter are installed on the output pipeline. The mass flow meter can provide accurate mass flow information, and the rotor flow meter can provide real-time volume flow data. The combination of the two can more accurately reflect the flow state of the fluid. The detection device can ventilate the instrument under test according to the set detection points and ventilation sequence, automatically switch the standard gases of different concentrations after the previous concentration measurement is completed, and automatically cut off the standard gas after the entire experimental process is completed, so as to realize the automation of the detection process, which can significantly improve the detection efficiency of the trace oxygen analyzer.

[0012] Furthermore, the mass flow meter sets the gas output flow rate to (0-3000) mL / min.

[0013] Furthermore, the first pressure gauge is used to display the remaining pressure in the gas cylinder, and the pressure range of the first pressure gauge is (0-25) MPa.

[0014] Furthermore, the second pressure gauge is used to display the output end pressure of the corresponding flow control branch, and the pressure range of the second pressure gauge is (0-1) MPa.

[0015] The above preferred solution can meet the detection requirements of most trace oxygen analyzers on the market and provide versatility of the detection device.

[0016] Furthermore, one end of the bus is connected to the output pipeline, and the other end is connected to a second electric ball valve, and the outlet end of each of the flow control branches is connected to the pipe body of the bus.

[0017] By adopting the above preferred solution, the pipeline can be purged by opening the second electric ball valve, thereby improving the cleaning efficiency of the impurity gas in the pipeline.

[0018] Furthermore, the inner hole diameter of the busbar is less than φ5 mm.

[0019] Furthermore, the inner hole diameter of the busbar is φ3mm.

[0020] Furthermore, the first electric ball valves of the flow control branches are evenly distributed on both sides of the bus.

[0021] Furthermore, the length of the connecting pipeline between each of the first electric ball valves and the bus is less than 50 mm.

[0022] By adopting the above preferred solution, the bus uses ultra-thin pipes, and the flow control branches are evenly distributed on both sides, so as to minimize the dead zone volume when the pipeline is switched, improve the utilization rate of the standard gas, and enhance the detection efficiency.

[0023] Furthermore, the air outlet end of the output pipeline is divided into a first air outlet branch and a second air outlet branch, the first air outlet branch is connected to a first switch valve, and the end of the first air outlet branch is connected to a stainless steel ferrule joint; the second air outlet branch is connected to a second switch valve, and the end of the second air outlet branch is connected to a quick-plug interface.

[0024] By adopting the above preferred solution, the outlet end of the first outlet branch is equipped with ferrule connectors of different specifications and models to meet the actual detection needs of instruments of different standards. The quick-plug interface at the outlet end of the second outlet branch is used to meet the detection of the quick-plug ventilation trace oxygen analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural principle diagram of an implementation method of the utility model.

[0027] Figure 2 It is a stereogram of an implementation manner of the utility model.

[0028] Figure 3 It is a front view of an implementation manner of the utility model.

[0029] The numbers and letters in the figure represent the names of the corresponding parts:

[0030] 11-gas cylinder; 20-flow control branch; 21-first pressure gauge; 22-pressure regulating valve; 23-second pressure gauge; 24-needle valve; 25-first electric ball valve; 31-bus; 32-second electric ball valve; 41-output pipeline; 42-mass flowmeter; 43-rotor flowmeter; 44-first outlet branch; 45-first switch valve; 46-second outlet branch; 47-second switch valve. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-3As shown, an automatic detection device for a trace oxygen analyzer includes a gas storage unit, a flow control unit, a bus unit, a standard gas output unit and a controller;

[0033] The gas storage unit includes at least 8 gas cylinders 11, wherein standard gas is stored in the gas cylinders 11, and the concentration of the standard gas in different gas cylinders 11 is different;

[0034] The flow control unit includes at least 8 flow control branches 20, the air inlet end of one flow control branch 20 is connected to one gas storage bottle 11, and each flow control branch 20 is sequentially installed with a first pressure gauge 21, a pressure regulating valve 22, a second pressure gauge 23, a needle valve 24 and a first electric ball valve 25 from the air inlet end to the air outlet end;

[0035] The bus unit includes a bus 31, and the outlet end of each flow control branch 20 is connected to the bus 31;

[0036] The standard gas output unit comprises an output pipeline 41, a mass flow meter 42 and a rotor flow meter 42 are installed on the output pipeline 41, and a gas interface is installed at the gas outlet end of the output pipeline 41;

[0037] The first electric ball valve 25 on each flow control branch 20 and the mass flow meter 42 and rotor flow meter 43 on the output pipeline 41 are all connected to the controller signal.

[0038] The beneficial effect of adopting the above technical solution is: the detection device is provided with multiple standard gas storage cylinders with different concentrations, and the automatic switching of standard gases of corresponding concentrations is controlled by different flow control branches. A mass flow meter and a rotor flow meter are installed on the output pipeline. The mass flow meter can provide accurate mass flow information, and the rotor flow meter can provide real-time volume flow data. The combination of the two can more accurately reflect the flow state of the fluid. This detection device can ventilate the instrument under test according to the set detection points and ventilation sequence, automatically switch standard gases of different concentrations after the previous concentration measurement is completed, and automatically cut off the standard gas after the entire experimental process is completed, thereby realizing the automation of the detection process, which can significantly improve the detection efficiency of the trace oxygen analyzer.

[0039] In other embodiments of the utility model, the mass flowmeter 42 sets the gas output flow rate to (0-3000) mL / min. The first pressure gauge 21 is used to display the residual pressure in the gas cylinder, and the pressure range of the first pressure gauge 21 is (0-25) MPa. The second pressure gauge 23 is used to display the output end pressure of the corresponding flow control branch, and the pressure range of the second pressure gauge 23 is (0-1) MPa. The beneficial effect of adopting the above technical solution is that it can meet the detection requirements of most trace oxygen analyzers on the market and provide the versatility of the detection device.

[0040] In other embodiments of the present invention, one end of the bus 31 is connected to the output pipeline 41, and the other end is connected to the second electric ball valve 32, and the gas outlet end of each flow control branch 20 is connected to the pipe body of the bus 31. The beneficial effect of adopting the above technical solution is that the pipeline can be purged by opening the second electric ball valve, thereby improving the cleaning efficiency of the impurity gas in the pipeline.

[0041] In some other embodiments of the present invention, the inner hole diameter of the busbar is less than φ5 mm.

[0042] like Figure 3 As shown, in some other embodiments of the utility model, the inner hole diameter of the bus 31 is φ3mm. The first electric ball valves 25 of each flow control branch are evenly distributed on both sides of the bus 31. The length of the connecting pipeline between each first electric ball valve 25 and the bus 31 is less than 50mm. The beneficial effects of adopting the above technical solution are: the bus adopts ultra-fine pipes, and each flow control branch is evenly distributed on both sides, which minimizes the dead zone volume when the pipeline is switched, improves the utilization rate of standard gas, and improves the detection efficiency.

[0043] like Figure 1 As shown, in some other embodiments of the utility model, the outlet end of the output pipeline 41 is divided into a first outlet branch 44 and a second outlet branch 46, the first outlet branch 44 is connected to a first switch valve 45, and the end of the first outlet branch 44 is connected to a stainless steel ferrule joint; the second outlet branch 46 is connected to a second switch valve 47, and the end of the second outlet branch 46 is connected to a quick-plug interface. The beneficial effect of adopting the above technical solution is that the outlet end of the first outlet branch is equipped with a ferrule joint of different specifications and models to meet the actual detection needs of instruments of different standards. The quick-plug interface at the outlet end of the second outlet branch is used to meet the detection of a trace oxygen analyzer with quick-plug ventilation.

[0044] In other embodiments of the utility model, the gas storage unit, flow control unit, bus unit, standard gas output unit and controller of the detection device are all installed on a detection cart. The main body of the cart is made of stainless steel, and moving wheels are installed at the bottom of the detection cart, which can be moved to different sites for detection according to actual detection needs.

[0045] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable ordinary technicians in the field to understand the content of the utility model and implement it. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A trace oxygen analyzer automatic detection device, characterized in that: It includes a gas storage unit, a flow control unit, a bus unit, a standard gas output unit and a controller; The gas storage unit includes at least 8 gas cylinders, wherein standard gas is stored in the gas cylinders, and the concentration of the standard gas in different gas cylinders is different; The flow control unit includes at least 8 flow control branches, the air inlet end of one of the flow control branches is connected to a gas storage bottle, and each of the flow control branches is sequentially installed with a first pressure gauge, a pressure regulating valve, a second pressure gauge, a needle valve and a first electric ball valve from the air inlet end to the air outlet end; The busbar unit comprises a busbar, and the gas outlet end of each of the flow control branches is connected to the busbar; The standard gas output unit comprises an output pipeline, a mass flow meter and a rotor flow meter are installed on the output pipeline, and a gas interface is installed at the gas outlet end of the output pipeline; The first electric ball valve on each flow control branch and the mass flow meter and rotor flow meter on the output pipeline are all connected to the controller signal.

2. The automatic detection device of trace oxygen analyzer according to claim 1, characterized in that: The mass flow meter sets the gas output flow rate to (0-3000) mL / min.

3. The automatic detection device of trace oxygen analyzer according to claim 1, characterized in that: The first pressure gauge is used to display the remaining pressure in the gas storage cylinder, and the pressure range of the first pressure gauge is (0-25) MPa.

4. The automatic detection device of trace oxygen analyzer according to claim 3, characterized in that: The second pressure gauge is used to display the output end pressure of the corresponding flow control branch, and the pressure range of the second pressure gauge is (0-1) MPa.

5. The automatic detection device of trace oxygen analyzer according to claim 1, characterized in that: One end of the bus is connected to the output pipeline, and the other end is connected to a second electric ball valve. The outlet end of each of the flow control branches is connected to the pipe body of the bus.

6. The automatic detection device of trace oxygen analyzer according to claim 5, characterized in that: The inner hole diameter of the busbar is less than φ5mm.

7. The automatic detection device of trace oxygen analyzer according to claim 6, characterized in that: The inner hole diameter of the busbar is φ3mm.

8. The automatic detection device of trace oxygen analyzer according to claim 5, characterized in that: The first electric ball valves of the flow control branches are evenly distributed on both sides of the bus.

9. The automatic detection device of trace oxygen analyzer according to claim 8, characterized in that: The length of the connecting pipeline between each of the first electric ball valves and the bus is less than 50 mm.

10. The automatic detection device of trace oxygen analyzer according to claim 1, characterized in that: The air outlet end of the output pipeline is divided into a first air outlet branch and a second air outlet branch, the first air outlet branch is connected to a first switch valve, and the end of the first air outlet branch is connected to a stainless steel ferrule joint; the second air outlet branch is connected to a second switch valve, and the end of the second air outlet branch is connected to a quick-connect interface.

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