A gas chromatograph sample gas injection handling device

Abstract

This utility model discloses a gas chromatography sample gas injection and processing device, comprising: a buffer bottle connected to the sample gas outlet; and an observation bottle connected to the buffer bottle, containing water, with its outlet connected to an exhaust hood; wherein both the buffer bottle and the observation bottle are transparent bottles. This utility model prevents toxic and harmful components in the sample gas from escaping into the air and affecting human health, and also avoids liquid entering the gas chromatography system and causing damage to the instrument.

Description

Technical Field

[0001] This utility model belongs to the field of gas chromatography technology, and in particular relates to a gas chromatography sample gas injection processing device. Background Technology

[0002] Currently, the gas chromatography gas sample introduction process is as follows: Figure 1 As shown: Sample gas enters the switching valve and metering tube of the gas chromatograph through the inlet. The tester confirms the smooth entry of sample gas into the gas chromatograph by observing the bubbling of the outlet gas tube immersed in water in a transparent glass bottle. However, the existing technology has the following drawbacks: 1. The sample gas discharge is open. If the sample gas contains toxic and harmful gases such as propane, butane, sulfides, carbon monoxide, etc., especially gases with strong odors such as hydrogen sulfide and ammonia, when the suction of the laboratory exhaust hood is insufficient, these toxic and harmful gases can easily be released into the air and inhaled by the tester, affecting human health; 2. After the sample gas is introduced, during the operation of the chromatography, the pressure inside the chromatograph may be lower than the external atmospheric pressure due to temperature rise and fall, switching valve operation, etc. If the sample gas outlet end is not removed and remains below the liquid surface, or if water remains in the sample gas outlet guide tube, water may be drawn back into the chromatograph, easily damaging the gas chromatograph. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gas chromatography sample gas injection and processing device that prevents toxic and harmful components in the sample gas from leaking into the indoor air and affecting human health, and also avoids liquid backflow into the gas chromatography system, which could damage the instrument.

[0004] To achieve the above objectives, this utility model is implemented using the following solution:

[0005] This utility model provides a gas chromatography sample gas injection processing device, including:

[0006] Buffer bottle, connected to the sample gas outlet;

[0007] The observation bottle is connected to the buffer bottle, which contains water, and its outlet is connected to the exhaust hood.

[0008] Both the buffer bottle and the observation bottle are transparent.

[0009] Optionally, it also includes a first gas delivery tube, one end of which is connected to the sample gas outlet and the other end of which is connected to a buffer bottle.

[0010] Optionally, it also includes a second air delivery tube, one end of which is connected to a buffer bottle and the other end of which is connected to an observation bottle.

[0011] Optionally, the other end of the second air tube is placed in water.

[0012] Optionally, it also includes a third air guide tube, one end of which is connected to the observation bottle and the other end of which is connected to the exhaust hood.

[0013] Optionally, the first gas delivery tube is sealed to the sample gas outlet and the buffer bottle.

[0014] Optionally, the second air delivery tube is sealed to both the buffer bottle and the observation bottle.

[0015] Optionally, the third air delivery tube is sealed to the observation bottle. Beneficial effects

[0016] This utility model connects the observation bottle to the exhaust hood and uses a direct exhaust method to discharge the sample gas. The sample gas is completely discharged through the exhaust hood, and the toxic and harmful components in the sample gas will not spill into the air and affect human health. The buffer bottle can store the water when the pressure inside the gas chromatograph decreases and water is drawn back from the observation bottle, thus preventing liquid from entering the gas chromatograph system and causing damage to the instrument. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gas chromatography gas sample injection process described in the background section;

[0018] Figure 2 This is a schematic diagram of the structure of a gas chromatography sample gas injection and processing device provided in Embodiment 2 of this utility model;

[0019] In the picture: 1. Buffer bottle; 2. Observation bottle; 3. Water. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model, and should not be used to limit the protection scope of this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0023] like Figure 2 As shown, this embodiment provides a gas chromatography sample gas injection and processing device, consisting of a buffer bottle 1 and an observation bottle 2. The buffer bottle 1 is connected to the sample gas outlet, and the observation bottle 2 is connected to the buffer bottle 1, containing water 3. Its outlet is connected to an exhaust hood. Both the buffer bottle and the observation bottle are transparent. The observation bottle 2 of this gas chromatography sample gas injection and processing device is connected to the exhaust hood, using a direct exhaust method for sample gas discharge. The sample gas is completely discharged through the exhaust hood, preventing toxic and harmful components in the sample gas from escaping into the air and affecting human health. When the pressure inside the gas chromatograph decreases and water 3 is drawn back from the observation bottle 2, the water 3 drawn back into the buffer bottle 1 is stored in the buffer bottle 1, preventing liquid from entering the gas chromatography system and causing damage to the instrument. Example 2

[0024] like Figure 2 As shown, this embodiment provides a gas chromatography sample gas injection and processing device, which consists of an overall buffer bottle 1, an observation bottle 2 and several gas guide tubes. The buffer bottle 1 is connected to the sample gas outlet, and the observation bottle 2 is connected to the buffer bottle 1. Water 3 is provided inside the observation bottle 2, and its outlet is connected to the exhaust hood. Both the buffer bottle and the observation bottle are transparent glass bottles.

[0025] Specifically, the sample gas outlet and buffer bottle 1 are connected via a first gas guide tube. One end of the first gas guide tube is connected to the sample gas outlet, and the other end is connected to buffer bottle 1. The first gas guide tube is sealed to the sample gas outlet, and the first gas guide tube and buffer bottle 1 are sealed together with a rubber stopper. Buffer bottle 1 and observation bottle 2 are connected via a second gas guide tube. One end of the second gas guide tube is connected to buffer bottle 1, and the other end is connected to observation bottle 2 and placed in water 3 to confirm that the sample gas has successfully entered the gas chromatograph. The second gas guide tube is sealed to both buffer bottle 1 and observation bottle 2 with rubber stoppers. Observation bottle 2 and exhaust hood are connected via a third gas guide tube. One end of the third gas guide tube is connected to observation bottle 2, and the other end is connected to exhaust hood. The third gas guide tube and observation bottle are sealed together with a rubber stopper.

[0026] Working principle:

[0027] When the sample gas is introduced, the gas enters the interior of the gas chromatograph. Excess gas first enters buffer bottle 1, and then from buffer bottle 1 into observation bottle 2, which is connected to the laboratory's exhaust hood. The gas delivery tube of observation bottle 2 extends below the liquid surface. The tester confirms that the sample gas has been successfully introduced into the gas chromatograph by observing the bubbling at the gas delivery tube submerged in water. Throughout the process, because the sample gas is discharged directly, and all gas delivery tubes are sealed to the sample gas outlet, buffer bottle 1, and observation bottle 2, the sample gas is completely discharged through the exhaust hood. Toxic and harmful components in the sample gas will not escape into the indoor air and affect human health.

[0028] If the internal pressure of the gas chromatograph decreases due to temperature rise / fall or valve switching during operation, the water drawn back from the inlet of the observation bottle will be stored in the buffer bottle, preventing liquid from entering the gas chromatograph system and causing damage to the instrument.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gas chromatography sample gas injection and processing device, characterized in that, include: Buffer bottle, connected to the sample gas outlet; The observation bottle is connected to the buffer bottle, which contains water, and its outlet is connected to the exhaust hood. Both the buffer bottle and the observation bottle are transparent.

2. The gas chromatography sample gas injection and processing device according to claim 1, characterized in that, It also includes a first gas delivery tube, one end of which is connected to the sample gas outlet and the other end of which is connected to a buffer bottle.

3. The gas chromatography sample gas injection and processing device according to claim 1, characterized in that, It also includes a second air delivery tube, one end of which is connected to a buffer bottle and the other end of which is connected to an observation bottle.

4. The gas chromatography sample gas injection and processing device according to claim 3, characterized in that, The other end of the second air delivery tube is placed in water.

5. The gas chromatography sample gas injection and processing device according to claim 1, characterized in that, It also includes a third air duct, one end of which is connected to the observation bottle and the other end of which is connected to the exhaust hood.

6. The gas chromatography sample gas injection and processing device according to claim 2, characterized in that, The first gas delivery tube is sealed to the sample gas outlet and the buffer bottle.

7. The gas chromatography sample gas injection and processing device according to claim 3, characterized in that, The second gas delivery tube is sealed to both the buffer bottle and the observation bottle.

8. The gas chromatographic sample gas injection and processing device according to claim 5, characterized in that, The third gas delivery tube is sealed to the observation bottle.

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