Multi-bit sequence sample injector

Abstract

The utility model discloses a multi-position sequence sample injector in the technical field of gas analysis, and aims to solve the problems that an analyzer in the prior art can only analyze one gas sample each time, the sample injection amount of the gas sample cannot be randomly set, the working efficiency is low, the analysis cost is high, and the gas samples in different states are inconvenient to analyze. The pressure reducing valve comprises a pressure reducing valve and a multi-position switching valve, a liquid gas inlet is formed in the input end of the pressure reducing valve, the output end of the pressure reducing valve is connected with the input end of the constant-temperature vaporizing chamber, and a first gas inlet, a gas outlet and a plurality of second gas inlets are formed in the multi-position switching valve; according to the utility model, different gases can be input into the analyzer for analysis work, so that the mixing phenomenon of the different gases is avoided, the analysis result of the analyzer is ensured, different gas sample injectors do not need to be replaced, and the injection pump is adopted, so that the sample injection amount of the gases can be freely set; meanwhile, the device can be suitable for analysis work of liquid gas and gaseous gas.

Description

Technical Field

[0001] The utility model relates to a multi-position sequence sample injector, belonging to the technical field of gas analysis. Background Art

[0002] Gas samples can be divided into liquid gas samples and gaseous gas samples. Liquid gas samples are generally stored in high-pressure cylinders, and gaseous gas samples are generally stored in air bags. Gas analysis plays a vital role in industrial production. By measuring the composition of the gas and understanding its properties, it is of great significance to ensure product quality and safe production. In addition, gas analysis can also help improve the supervision of gas, avoid accidents caused by inadequate supervision, and ensure the dual safety of production and the environment. In summary, the importance of gas sample analysis is reflected in many aspects. From ensuring safe production to environmental protection, to quality control, the application of gas analysis technology is inseparable. Gas component analysis generally uses a chromatographic analyzer, and elemental analysis in gas generally uses an elemental analyzer. The gas is usually input into the analyzer through a gas injector for analysis.

[0003] After the existing gas sampler is connected to the analyzer, the analyzer can only analyze one gas sample at a time, and manual replacement is required to analyze the next gas sample to avoid mixing of different gas samples in the gas sampler, which affects the analysis results. In addition, the gas sample injection volume cannot be set arbitrarily, resulting in low work efficiency, high analysis cost, and inconvenience in analyzing gas samples in different states, which affects the working effect of the analyzer. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a multi-position sequence injector to solve the problem that after the existing gas injector is connected to the analyzer, the analyzer can only analyze one gas sample at a time and needs to be manually replaced before the next gas sample can be analyzed. In addition, the gas sample injection volume cannot be set arbitrarily, the working efficiency is low, the analysis cost is high, and it is inconvenient to analyze gas samples in different states.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The utility model provides a multi-position sequence injector, comprising a pressure reducing valve and a multi-position switching valve, wherein the input end of the pressure reducing valve is provided with a liquid gas inlet, the output end of the pressure reducing valve is connected to the input end of a constant temperature vaporization chamber, the multi-position switching valve is provided with a first air inlet, an air outlet and a plurality of second air inlets, the output end of the constant temperature vaporization chamber is connected to the first air inlet, the air outlet is connected to the input end of an injection pump, the output end of the injection pump is connected to the input end of an electromagnetic valve, the first output end of the electromagnetic valve is connected to an analyzer, and the second output end of the electromagnetic valve is connected to an emptying device.

[0007] Furthermore, the output end of the pressure reducing valve is connected to the input end of the constant temperature vaporization chamber through a pressure divider.

[0008] Furthermore, the constant temperature vaporization chamber is electrically connected to a temperature controller.

[0009] Furthermore, the solenoid valve is a two-position three-way solenoid valve.

[0010] Furthermore, the output end of the constant temperature vaporization chamber is connected to the first port of the first three-way valve, and the second port of the first three-way valve is connected to the first air inlet.

[0011] Furthermore, the exhaust device is a second three-way valve, the second output end of the solenoid valve is connected to the first port of the second three-way valve, and the second port of the second three-way valve is used to exhaust the gas.

[0012] Furthermore, the third port of the first three-way valve is connected to the third port of the second three-way valve.

[0013] Furthermore, the output end of the injection pump is connected to the input end of the solenoid valve through a one-way valve.

[0014] Furthermore, the analyzer includes a chromatographic analyzer and an elemental analyzer.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The multi-position sequence injector cooperates with a constant temperature vaporization chamber, a multi-position switching valve, an electromagnetic valve and an emptying device. After the multi-position switching valve switches to a different second air inlet or a first air inlet, when analyzing different gas samples, the injection pump can first suck the gas into its interior for cleaning, and discharge the gas used for cleaning from the emptying device to avoid mixing of different gases inside the injection pump. After the injection pump completes cleaning, it sucks in the required quantitative gas and discharges the gas into the analyzer for analysis, so that the device can input different gases into the analyzer for analysis and avoid mixing of different gases in the device, thereby ensuring the analysis results of the analyzer. There is no need to replace different gas injectors, thereby ensuring work efficiency. The device adopts a injection pump, and the gas injection volume can be freely set, thereby ensuring the work efficiency of the device and saving analysis costs. At the same time, the device is applicable to the analysis of liquid gases and gaseous gases, thereby ensuring the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a connection diagram of a multi-bit sequence injector provided according to an embodiment of the utility model.

[0018] In the figure: 1. Pressure reducing valve; 2. Liquid gas inlet; 3. Constant temperature vaporization chamber; 4. Multi-position switching valve; 5. First air inlet; 6. Second air inlet; 7. Air outlet; 8. Injection pump; 9. Solenoid valve; 10. Pressure gauge; 11. Temperature controller; 12. First three-way valve; 13. Second three-way valve. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to connections within two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0022] like Figure 1As shown, the utility model provides a multi-position sequence injector, including a pressure reducing valve 1 and a multi-position switching valve 4, the input end of the pressure reducing valve 1 is provided with a liquid gas inlet 2, the output end of the pressure reducing valve 1 is connected to the input end of a constant temperature vaporization chamber 3, the multi-position switching valve 4 is provided with a first air inlet 5, an air outlet 7 and a plurality of second air inlets 6, the output end of the constant temperature vaporization chamber 3 is connected to the first air inlet 5, the air outlet 7 is connected to the input end of an injection pump 8, the output end of the injection pump 8 is connected to the input end of an electromagnetic valve 9, the first output end of the electromagnetic valve 9 is connected to an analyzer, and the second output end of the electromagnetic valve 9 is connected to an emptying device; the analyzer includes a chromatographic analyzer and an elemental analyzer.

[0023] Specifically, the liquid gas to be detected is placed in a high-pressure steel cylinder, the gaseous gas to be detected is placed in an air bag, and the required analyzer is connected to the first output end of the solenoid valve 9. When working, the high-pressure steel cylinder is connected to the liquid gas inlet 2, and multiple air bags containing different gas samples are connected to multiple second air inlets 6 respectively. When it is necessary to detect the gas in a certain air bag, the multi-position switching valve 4 is controlled to connect the corresponding second air inlet 6 with the air outlet 7, and then the injection pump 8 starts to work to inject the gas from the air bag through the second air inlet 6. The second air inlet 6 and the air outlet 7 draw air into the interior of the syringe pump 8, and clean the cavity inside the syringe pump 8 according to the set cleaning times, cleaning volume and exhaust speed, and then the syringe pump 8 discharges the gas used for cleaning into the solenoid valve 9, and the solenoid valve 9 discharges the gas used for cleaning through the emptying device. After the cleaning work of the syringe pump 8 is completed, the syringe pump 8 is controlled to extract gas from the air bag according to the set injection volume, and then the multi-position switching valve 4 is switched to the empty position, and the input end of the solenoid valve 9 is connected to the first output end. After the injection pump 8 discharges the extracted gas, the gas is input into the analyzer through the electromagnetic valve 9 for analysis; when it is necessary to detect and analyze the liquid gas, the pressure reducing valve 1 reduces the high-pressure liquid gas in the high-pressure cylinder to a certain pressure, and then inputs the reduced-pressure liquid gas into the interior of the constant-temperature vaporization chamber 3 to vaporize the liquid gas into gaseous gas, and then controls the first air inlet 5 of the multi-position switching valve 4 to be connected with the air outlet 7, and the injection pump 8 starts working, and the gas is drawn into the analyzer from the high-pressure cylinder through the first air inlet 5 and the air outlet 7. The interior of the injection pump 8 is cleaned according to the set cleaning times, cleaning volume and exhaust speed, and then the injection pump 8 discharges the gas used for cleaning through the exhaust device. After the cleaning work of the injection pump 8 is completed, the injection pump 8 is controlled to extract gas according to the set injection volume, and then the multi-position switching valve 4 is switched to the empty position, and the injection pump 8 discharges the extracted gas and inputs the gas into the analyzer through the solenoid valve 9 for analysis; optionally, the number of the second air inlet 6 is at least six.

[0024] The utility model cooperates with the constant temperature vaporization chamber 3, the multi-position switching valve 4, the solenoid valve 9 and the emptying device. After the multi-position switching valve 4 switches the different second air inlet 6 or the first air inlet 5, when analyzing different gas samples, the injection pump 8 can first suck the gas into its interior for cleaning, and discharge the gas used for cleaning from the emptying device to avoid mixing of different gases inside the injection pump 8. After the injection pump 8 completes cleaning, it sucks in the required quantitative gas and discharges the gas into the analyzer for analysis, so that the device can input different gases into the analyzer for analysis and avoid mixing of different gases in the device, thereby ensuring the analysis results of the analyzer. There is no need to replace different gas samplers, thereby ensuring work efficiency. The device adopts the injection pump 8, and the gas injection volume can be freely set, thereby ensuring the work efficiency of the device and saving analysis costs. At the same time, the device is applicable to the analysis of liquid gas and gaseous gas, thereby ensuring the practicality of the device.

[0025] In one embodiment, the output end of the pressure reducing valve 1 is connected to the input end of the constant temperature vaporization chamber 3 through a pressure divider 10, and the pressure divider 10 is used to observe and control the decompressed liquid gas to ensure the stability of the device during operation.

[0026] In one embodiment, the constant temperature vaporization chamber 3 is electrically connected to the temperature controller 11 , and the temperature inside the constant temperature vaporization chamber 3 is controlled by the temperature controller 11 to adapt to different working requirements.

[0027] In one embodiment, the solenoid valve 9 is a two-position three-way solenoid valve.

[0028] In one embodiment, the output end of the constant temperature vaporization chamber 3 is connected to the first port of the first three-way valve 12, the second port of the first three-way valve 12 is connected to the first air inlet 5, the emptying device is a second three-way valve 13, the second output end of the solenoid valve 9 is connected to the first port of the second three-way valve 13, the second port of the second three-way valve 13 is used to discharge the gas, and the third port of the first three-way valve 12 is connected to the third port of the second three-way valve 13.

[0029] During use, when it is necessary to analyze the liquid gas, the first port of the first three-way valve 12 is connected to the second port; when it is not necessary to analyze the liquid gas and there is excess gas in the constant temperature vaporization chamber 3, the first port of the first three-way valve 12 can be connected to the third port, and the third port of the second three-way valve 13 can be connected to the second port. At this time, the excess gas in the constant temperature vaporization chamber 3 can be discharged through the second three-way valve 13; when it is necessary to discharge the gas discharged by the injection pump 8, the first port of the second three-way valve 13 is connected to the second port. After the gas passes through the solenoid valve 9, the gas can be discharged through the second three-way valve 13.

[0030] In one embodiment, the output end of the injection pump 8 is connected to the input end of the solenoid valve 9 through a one-way valve. The one-way valve is used to prevent backflow when the injection pump 8 extracts gas, thereby improving the accuracy of the analysis. Optionally, the two-position three-way solenoid valve has the function of a one-way valve.

[0031] In one embodiment, the injection pump 8 can adopt a volume of 10mL, 20mL or larger according to the analysis needs, and the amount of gas pumped can be set arbitrarily, thereby improving the detection range of the analyzer. The multi-position switching valve 4 and the injection pump 8 have their own stepper motors controlled by a built-in single-chip microcomputer, and are connected to the analyzer host computer with a 232 communication port. Through the software setting of the analyzer host computer, the injection pump 8 can be connected to each first air inlet 5 or second air inlet 6 on the multi-position switching valve 4 respectively, so that the injection pump 8 can clean and sample different gas samples and discharge them into the analyzer for detection, thereby realizing fully automatic sequential sampling of gas samples.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-bit sequence injector, characterized in that: The invention comprises a pressure reducing valve (1) and a multi-position switching valve (4), wherein the input end of the pressure reducing valve (1) is provided with a liquid gas inlet (2), the output end of the pressure reducing valve (1) is connected to the input end of a constant temperature vaporization chamber (3), the multi-position switching valve (4) is provided with a first air inlet (5), an air outlet (7) and a plurality of second air inlets (6), the output end of the constant temperature vaporization chamber (3) is connected to the first air inlet (5), the air outlet (7) is connected to the input end of an injection pump (8), the output end of the injection pump (8) is connected to the input end of an electromagnetic valve (9), the first output end of the electromagnetic valve (9) is connected to an analyzer, and the second output end of the electromagnetic valve (9) is connected to an emptying device.

2. The multi-bit sequence injector according to claim 1, characterized in that: The output end of the pressure reducing valve (1) is connected to the input end of the constant temperature vaporization chamber (3) via a pressure divider (10).

3. The multi-bit sequence injector according to claim 1, characterized in that: The constant temperature vaporization chamber (3) is electrically connected to the temperature controller (11).

4. The multi-bit sequence injector according to claim 1, characterized in that: The solenoid valve (9) is a two-position three-way solenoid valve.

5. The multi-bit sequence injector according to claim 1, characterized in that: The output end of the constant temperature vaporization chamber (3) is connected to the first port of the first three-way valve (12), and the second port of the first three-way valve (12) is connected to the first air inlet (5).

6. The multi-bit sequence injector according to claim 5, characterized in that: The exhaust device is a second three-way valve (13), the second output end of the solenoid valve (9) is connected to the first port of the second three-way valve (13), and the second port of the second three-way valve (13) is used to exhaust the gas.

7. The multi-bit sequence injector according to claim 6, characterized in that: The third port of the first three-way valve (12) is connected to the third port of the second three-way valve (13).

8. The multi-bit sequence injector according to claim 1, characterized in that: The output end of the injection pump (8) is connected to the input end of the solenoid valve (9) via a one-way valve.

9. The multi-bit sequence injector according to claim 1, characterized in that: The analyzers include chromatographic analyzers and elemental analyzers.

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