GAS-3519P gas automatic sampler

Abstract

The utility model relates to the technical field of automatic sample injectors, and discloses a GAS-3519P gas automatic sample injector which comprises an equipment box, a plurality of gas bag connectors are arranged at the rear end of the equipment box, and sample gas bags a are arranged on the gas bag connectors; the multiple multi-way selection valves are located in the equipment box, and the multiple air bag connectors communicate with air inlet ports of the multi-way selection valves in a one-to-one correspondence mode through connecting pipelines; the multi-way selector valves are located in the equipment box, and an air inlet port of each multi-way selector valve is communicated with a public port of the last multi-way selector valve. The automatic diluting mechanism is additionally arranged on the equipment box, an additional dynamic diluting instrument is not needed, standard gas can be directly diluted in proportion, operation steps can be saved, meanwhile, the gas heating box is arranged on the rear side of the equipment box, dropping liquid on the wall of a gas bag can be prevented from being condensed, the adsorbed quantity of the gas in a pipeline is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic samplers, in particular to a GAS-3519P gas automatic sampler. Background Technique

[0002] An automatic sampler is a part of a gas chromatography (GC) system, which is used to automatically introduce samples into the chromatographic column for analysis. Its function is to replace manual operation and improve the efficiency and accuracy of sample processing. The automatic sampler can automatically perform sample injection and mixing according to the set program, and can usually process multiple samples and ensure the consistency and repeatability of the analysis.

[0003] When measuring and analyzing some high-concentration sample gases, in order to simulate experimental conditions, make the concentration of the sample gas meet the actual application scenario, or improve the measurement range and accuracy of the analytical instrument, and ensure the accuracy of the measurement results, it is necessary to dilute them. The existing dilution methods are mostly to dilute through a dynamic dilutor and then bag them, and then the automatic sampler introduces them into the chromatographic column. The steps are relatively cumbersome; if the external temperature is relatively low, liquid droplets may condense on the wall of the gas bag, resulting in a large amount of adsorption of the sample gas in the pipeline, affecting the accuracy of the detection.

[0004] Therefore, we propose a GAS-3519P gas automatic sampler to solve the problems mentioned above. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art in the above-mentioned background technique, the purpose of the present utility model is to provide a GAS-3519P gas automatic sampler to solve the problems mentioned in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above purpose, the present utility model is realized through the following technical solutions:

[0009] A GAS-3519P gas automatic sampler includes an equipment box, and a plurality of gas bag connectors are arranged at the rear end of the equipment box, and sample gas bags a are arranged on each of the plurality of gas bag connectors;

[0010] A multi-way selection valve, the multi-way selection valve is located inside the equipment box and there are a plurality of them. The plurality of gas bag connectors are in one-to-one correspondence and communication with the intake ports of the multi-way selection valve through connecting pipes;

[0011] Multi-way switching valve, the multi-way selection valve is located inside the equipment box, and the intake port of the multi-way switching valve is communicated with the common port of the last multi-way selection valve;

[0012] Sampling pump, the intake port of the sampling pump is communicated with the outlet port of the multi-way switching valve, and is used to provide power for gas flow;

[0013] Output gas pipe, the intake port of the output gas pipe is communicated with the outlet port of the multi-way switching valve through a quantitative loop, and the outlet port of the output gas pipe is communicated with the GC carrier gas;

[0014] Automatic dilution mechanism, including a standard gas joint and an inert gas joint arranged on the equipment box, a tee joint and a mixing pipe. The standard gas joint and the inert gas joint are both communicated with the two ports of the tee joint through the inlet pipe. The two ends of the mixing pipe are respectively communicated with the other port of the tee joint and one of the intake ports of the multi-way selection valve. A flow controller is arranged on the inlet pipe.

[0015] Further, the number of the gas bag joints is forty.

[0016] Further, the multi-way selection valve is a twelve-way selection valve, and the multi-way switching valve is a ten-way switching valve.

[0017] Further, the number of the multi-way selection valves is four, and the outlet ports of three of the multi-way selection valves are communicated with three of the intake ports of the last multi-way selection valve.

[0018] Preferably, the mixing pipe is in a spiral structure.

[0019] Preferably, a gas heating box is arranged at the rear end of the equipment box, and a plurality of the sample gas bags a are located inside the gas heating box.

[0020] Preferably, walking wheels are arranged at the bottom of the gas heating box.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] By adding an automatic dilution mechanism to the equipment box, there is no need for an additional dynamic diluter, and the standard gas can be directly diluted proportionally, which can save operation steps. At the same time, a gas heating box is arranged at the rear side of the equipment box, which can prevent liquid droplets from condensing on the gas bag wall, reduce the adsorption amount of gas in the pipeline, and improve the detection accuracy. Description of the drawings

[0024] Figure 1 It is a schematic diagram of the internal structure of the equipment box of the GAS-3519P gas automatic sampler of the present utility model;

[0025] Figure 2 Schematic diagram of the installation position of the gas heating box of the GAS-3519P gas automatic sampler of the present utility model;

[0026] Figure 3 Schematic diagram of the gas circuit structure of the GAS-3519P gas automatic sampler of the present utility model;

[0027] Figure 4 Schematic diagram of the partial gas circuit structure of the GAS-3519P gas automatic sampler of the present utility model;

[0028] Figure 5 Schematic diagram of the switching of the switching valve of the GAS-3519P gas automatic sampler of the present utility model.

[0029] In the figure: sample gas bag a, equipment box 1, gas bag connector 2, multi-way selection valve 3, sampling pump 4, multi-way switching valve 5, quantitative loop 6, output gas pipe 7, flow controller 8, standard gas connector 9, inert gas connector 10, tee connector 11, mixing tube 12, gas heating box 13. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1-5 As shown, the present utility model provides a GAS-3519P gas automatic sampler, including an equipment box 1, a multi-way selection valve 3, a sampling pump 4, a multi-way switching valve 5, a quantitative loop 6 and an automatic dilution mechanism. There are multiple gas bag connectors 2 at the rear end of the equipment box 1, and sample gas bags a are arranged on each of the multiple gas bag connectors 2. The multi-way selection valve 3 is located inside the equipment box 1 and there are multiple ones. The multiple gas bag connectors 2 are in one-to-one correspondence and communicated with the intake ports of the multi-way selection valve 3 through connecting pipes. The multi-way selection valve 3 is located inside the equipment box 1. The intake port of the multi-way switching valve 5 is communicated with the common port of the last multi-way selection valve 3. The sampling pump 4 is a vacuum pump, and the intake port of the sampling pump 4 is communicated and used with the outlet port of the multi-way switching valve 5 to provide power for the gas flow. The intake port of the output gas pipe 7 is communicated with the outlet port of the multi-way switching valve 5 through the quantitative loop 6, and the outlet port of the output gas pipe 7 is communicated with the GC carrier gas.

[0032] After the sample gas bag a is inserted into the gas bag connector 2, the sampling pump 4 is started. After the sampling pump 4 is started, the gas in the sample gas bag a is extracted, so that it passes through the multi-way selection valve 3 and the multi-way switching valve 5 in sequence. After the multi-way switching valve 5 is switched, the sample gas is captured by the GC carrier gas through the quantitative loop 6 and the output gas pipe 7 into the gas chromatograph for detection, and the gas in the corresponding gas bag is extracted according to the control of the end of the multi-way selection valve 3.

[0033] The automatic dilution mechanism includes a standard gas connector 9 and an inert gas connector 10, a three-way connector 11 and a mixing tube 12 arranged on the equipment box 1. The standard gas connector 9 and the inert gas connector 10 are connected through two ports of the three-way connector 11 of the air inlet pipe. The two ends of the mixing tube 12 are respectively connected to the other port of the three-way connector 11 and one of the air inlet ports of the multi-way selection valve 3. A flow controller 8 is arranged on the air inlet pipe.

[0034] The standard gas and the inert gas enter through two inlet pipes respectively, and the inlet volume is proportionally controlled by the flow controller 8, and then enters the mixing tube 12 through the three-way joint 11 for mixing and dilution. The mixing tube 12 is preferably a spiral pipeline to improve the uniformity of mixing the standard gas and the inert gas. The diluted sample gas is then captured by the GC carrier gas through the multi-way selection valve 3, the multi-way switching valve 5, the quantitative loop 6 and the output gas pipe 7 to be detected in the gas chromatograph. Compared with the traditional dynamic diluter, it can simplify the operation steps and improve the gas sampling efficiency.

[0035] As a preferred technical solution of the utility model: a gas heating box 13 is attached to the rear end of the equipment box 1, and multiple sample gas bags a are located in the gas heating box 13. The gas heating box 13 can prevent condensation of dripping liquid on the gas bag wall, reduce the amount of gas adsorbed in the pipeline, and improve the accuracy of detection.

[0036] As a preferred technical solution of the utility model: walking wheels are arranged at the bottom of the gas heating box 13, so that the customer can move the gas heating box 13 according to needs.

[0037] As a preferred technical solution of the utility model: the number of air bag connectors 2 is forty, the number of multi-way selection valves 3 is four, wherein the outlet ports of three multi-way selection valves 3 are connected to three of the inlet ports of the last multi-way selection valve 3, the multi-way selection valve 3 is a twelve-way selection valve, and the multi-way switching valve 5 is a ten-way switching valve. The automatic gas injector can support a maximum of 40 injections, which can meet the customized needs of customers. If the customer needs to customize a certain number of injectors, it can be achieved by simply changing the hole positions and layout of the left panel, which greatly shortens the research and development cycle.

[0038] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances; for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A GAS-3519P gas automatic sampler, characterized in that: include: An equipment box (1), wherein a plurality of air bag connectors (2) are arranged at the rear end of the equipment box (1), and a sample air bag a is arranged on each of the plurality of air bag connectors (2); A multi-way selector valve (3), the multi-way selector valve (3) being located in the equipment box (1) and provided with a plurality of air bag connectors (2) being connected to the air inlet ports of the multi-way selector valve (3) in a one-to-one correspondence via connecting pipes; A multi-way switching valve (5), wherein the multi-way selection valve (3) is located in the equipment box (1), and the air inlet port of the multi-way switching valve (5) is connected to the common port of the multi-way selection valve (3) of the last multi-way selection valve; A sampling pump (4), wherein the air inlet port of the sampling pump (4) is connected to the air outlet port of the multi-way switching valve (5) for providing power for gas flow; An output gas pipe (7), wherein an air inlet port of the output gas pipe (7) is connected to an air outlet port of a multi-way switching valve (5) through a quantitative ring (6), and an air outlet port of the output gas pipe (7) is connected to a GC carrier gas; The automatic dilution mechanism comprises a standard gas joint (9) and an inert gas joint (10) arranged on an equipment box (1), a three-way joint (11) and a mixing tube (12); the standard gas joint (9) and the inert gas joint (10) are both connected through two ports of the three-way joint (11) of the air inlet pipe; the two ends of the mixing tube (12) are respectively connected to the other port of the three-way joint (11) and one of the air inlet ports of the multi-way selection valve (3); and a flow controller (8) is arranged on the air inlet pipe.

2. A GAS-3519P gas automatic sampler according to claim 1, characterized in that: The number of the air bag connectors (2) is forty.

3. A GAS-3519P gas automatic sampler according to claim 2, characterized in that: The multi-way selection valve (3) is a twelve-way selection valve, and the multi-way switching valve (5) is a ten-way switching valve.

4. A GAS-3519P gas automatic sampler according to claim 3, characterized in that: The number of the multi-way selector valves (3) is four, wherein the outlet ports of three of the multi-way selector valves (3) are in communication with three of the inlet ports of the last multi-way selector valve (3).

5. A GAS-3519P gas automatic sampler according to claim 1, characterized in that: The mixing tube (12) has a spiral structure.

6. A GAS-3519P gas automatic sampler according to claim 1, characterized in that: A gas heating box (13) is provided at the rear end of the equipment box (1), and a plurality of sample gas bags a are located in the gas heating box (13).

7. A GAS-3519P gas automatic sampler according to claim 6, characterized in that: The bottom of the gas heating box (13) is provided with running wheels.

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