Gas chromatography packed column

Abstract

The utility model relates to the technical field of gas detection, and discloses a gas chromatography packed column which comprises a column tube, an air inlet end and an air outlet end are arranged at the two ends of the column pipe respectively, and the air inlet end and the air outlet end are filled with blocking cotton layers; a limiting pipe is fixedly arranged in the column pipe, the limiting pipe and the inner wall of the column pipe form a double-layer structure, the limiting pipe is a multi-section pipe which is communicated, the interior of the column pipe is divided into multiple sections through the limiting pipe, and the column pipe is filled with a stationary phase. The gas chromatography packed column solves the problem that the service life of the gas chromatography packed column is affected due to the fact that the filler in the gas chromatography packed column is easy to loosen in daily use, and the like, the column pipe is better arranged into two layers through the limiting pipe, meanwhile, a filled stationary phase is fixed, flowing of the stationary phase is reduced, and the service life of the gas chromatography packed column is prolonged. Therefore, the stationary phase is more stable in the column tube, and the service life of the chromatographic column is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical chemistry, in particular to a gas chromatography packed column. Background Art

[0002] Chromatography is a separation and analysis method, which is widely used in the detection and analysis of multiple fields such as petroleum, chemistry, environment, biology, and food. In chromatography, the chromatographic column is directly related to the separation effect and detection sensitivity.

[0003] Gas chromatography is a type of chromatography with wide applications. It can also be used to detect samples containing pollutants and complex components. For example, gas chromatography can be used to detect petroleum product pollutants. The chromatographic column is used to separate the components of petroleum pollutants, and the components are passed through the detector in sequence to perform qualitative and quantitative analysis on the components.

[0004] In the prior art, the fillers in the gas chromatography packed column are not easy to fix. During daily use of the gas chromatography packed column, the fillers often become loose in the column or even spray out, which not only affects the analysis accuracy but also reduces the service life of the chromatographic column, and cannot well meet the experimental analysis needs in reality. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems that the internal fillers of the gas chromatography packed column are easy to loosen during daily use, thereby affecting the service life of the chromatographic column, etc.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas chromatography packed column, comprising:

[0008] A column tube; and,

[0009] An air inlet end and an air outlet end are respectively opened at both ends of the column tube, and a plugging cotton layer is filled in the air inlet end and the air outlet end;

[0010] A limiting tube is fixedly arranged inside the column tube. The limiting tube and the inner wall of the column tube form a double-layer structure. The limiting tube is a multi-section tube that is connected. The inside of the column tube is divided into multiple sections through the limiting tube, and a stationary phase is filled inside the column tube.

[0011] According to the gas chromatography packed column provided by the utility model: A filling cavity runs through the inside of the column tube, the filling cavity is filled with a stationary phase, and the stationary phase is 70-90 mesh.

[0012] According to the gas chromatography packed column provided by the utility model: The limiting tube is dumbbell-shaped, and the protruding rings at both ends of the limiting tube are fixedly connected to the inner wall of the column tube, so that the limiting tube and the column tube form a double-layer wall.

[0013] According to the gas chromatography packed column provided by the present utility model: the restricting tube is a communicating tube, and a plurality of separating plates are uniformly arranged inside the restricting tube. The separating plates are in a structure of a sieve, and the restricting tube is formed into the same multi-sections inside through the separating plates.

[0014] According to the gas chromatography packed column provided by the present utility model: a feeding hole is penetrated and opened on the outer wall of the restricting tube, and a storage cavity is formed between the restricting tube and the inner wall of the column tube, and the storage cavity is also filled with a stationary phase.

[0015] The present utility model has the following beneficial effects:

[0016] By using the restricting tube and setting the restricting tube in a dumbbell shape, the restricting tube can better contact with both ends of the column tube when placed in the column tube, so that the column tube and the restricting tube are connected together. Secondly, the inside of the column tube is divided into different regions by the restricting tube. Through the division of regions, the filled stationary phase is more stable in the column tube, the flow is reduced, and the situation of loosening will not occur, thereby improving the service life of the chromatographic column and meeting the requirements of experimental analysis. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 is a schematic diagram of the bottom of the overall structure of an embodiment of the present utility model;

[0019] Figure 3 is a top view plane structure diagram of an embodiment of the present utility model;

[0020] Figure 4 is Figure 3 a sectional view taken along line A-A in

[0021] Figure 5 is a schematic diagram of the structure of the restricting tube of an embodiment of the present utility model.

[0022] Legend Explanation:

[0023] 1. Column tube;

[0024] 10. Plugging cotton layer; 11. Filling cavity; 110. Stationary phase; 12. Restricting tube; 120. Feeding hole; 121. Separating plate; 1210. Leakage hole; 13. Storage cavity. Detailed Embodiment

[0025] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0026] Next, in combination with Figures 1-5 the embodiments shown, the technical solutions of the present utility model will be described:

[0027] As Figures 1-2 shown, the gas chromatographic packed column implemented by the present utility model includes a column tube 1. The column tube 1 is cylindrical, with an overall length of 0.5 - 10 m and is coiled into a disc during use, and the inner diameter of the column tube 1 is 2 - 10 mm. Secondly, the inside of the column tube 1 is filled with a stationary phase 110, and the material of the column tube 1 usually includes stainless steel tubes, copper tubes, aluminum tubes, nickel-plated copper tubes, glass tubes, and polytetrafluoroethylene tubes, etc.

[0028] As Figure 2 shown, at the inlet and outlet, a plugging cotton layer 10 is filled and provided, which can better prevent the stationary phase 110 filled in the column tube 1 from being washed out, fix the stationary phase 110, and secondly, better prevent pollutants from entering the column tube 1 at the inlet. At the same time, it makes the detection more convenient, improves the detection accuracy. By fixing both ends of the column tube 1, the filled stationary phase 110 is made more compact, thus better preventing the loosening of the stationary phase 110 in the column tube 1, reducing the damage of the column tube 1, and thus improving the overall service life.

[0029] As Figure 4 and Figure 5 shown, a filling cavity 11 is opened inside the column tube 1, and the filling cavity 11 runs through the inside of the column tube 1 as a whole. At the same time, a restricting tube 12 is arranged inside the column tube 1. The restricting tube 12 is dumbbell-shaped and hollow, and is arranged in a through manner like the column tube 1. When the restricting tube 12 is arranged, the space sizes reserved at both ends are the same, which is convenient for filling the plugging cotton layer 10 at both ends. The restricting tube 12 and the column tube 1 are integrally formed, making the restricting tube 12 better connected to the column tube 1. At the same time, it better restricts and separates the filling material in the column tube 1 through the restricting tube 12, making the stationary phase 110 in the column tube 1 more stable.

[0030] It should be noted that a plurality of separation plates 121 are uniformly arranged on the inner wall of the restriction tube 12. The restriction tube 12 is set into multiple sections through the separation plates 121, and the size of each small section is the same and the filled stationary phase 110 is also the same. Leakage holes 1210 are opened on the separation plates 121 to allow the detection object to pass through. When the detection object passes through the filling cavity 11 of the stationary phase 110, it will not drive the stationary phase 110 to move, so that the stationary phase 110 is more stable in the column tube 1 and will not flow with the detected object. Thus, the filling of the stationary phase 110 at each place in the column tube 1 is the same, and further the detection result is more accurate. At the same time, since the flow of the stationary phase 110 is restricted, the flow and ejection of the stationary phase 110 are hindered, thereby better improving the service life of the column tube 1, making the column tube 1 more stable and the detection result more accurate.

[0031] As Figure 5 shown, the restriction tube 12 is set in a dumbbell shape, and a feeding hole 120 is opened on the surface of the restriction tube 12. The feeding hole 120 is arranged on the entire restriction tube 12. Secondly, through the dumbbell-shaped setting, when distributed in the column tube 1, storage cavities 13 are formed between the restriction tube 12 and the inner wall of the column tube 1 through the two ends of the dumbbell. Then, the stationary phase 110 is also filled in the storage cavities 13. The stationary phase 110 in the storage cavities 13 is for supplementary setting to the restriction tube 12. Then, when the stationary phase 110 in the restriction tube 12 decreases during use, it can be supplemented through the storage cavities 13. Thus, the stationary phase 110 in the restriction tube 12 can be more stable, and at the same time, the overall service time and service life are better improved. The column tube 1 provided with the storage cavities 13 playing a supplementary role has a significantly longer service life than the ordinary column tube 1, making the overall use more durable.

[0032] Furthermore, it should be noted that the feeding hole 120 penetrating through the outer wall of the restriction tube 12 is frustum-shaped, with the small opening facing the inside and the large opening facing the outside. The material is added from the outside to the inside, that is, the filled stationary phase 110 can only enter the inside of the restriction tube 12 through the feeding hole 120 from the outside of the restriction tube 12. That is, the stationary phase 110 filled into the restriction tube 12 will not flow out of the restriction tube 12 through the feeding hole 120. Thus, the stationary phase 110 inside the restriction tube 12 is more stable and better maintains a stable state. Secondly, when the stationary phase 110 gradually decreases during use, the stationary phase 110 in the storage cavities 13 can be supplemented into the restriction tube 12, so that the stationary phase 110 in the restriction tube 12 can maintain a stable state. Thus, it is more accurate during detection, and at the same time, the service life of the column tube 1 is better improved, making the use time longer.

[0033] Usage method:

[0034] During use, since the length of the column tube 1 is relatively long, it can be shaped by U-shaped winding or spiral winding to fix the relatively long column tube 1 together. When winding and fixing, the stationary phase 110 is filled into the column tube 1. Due to the arrangement of the restriction tube 12 on the inner wall of the column tube 1, and the dumbbell-shaped ends of the restriction tube 12, a storage cavity 13 is formed between the restriction tube 12 and the column tube 1. The stationary phase 110 is filled and arranged in the storage cavity 13 and the restriction tube 12. After filling, both ends of the column tube 1 are blocked by the plugging cotton layer 10, and then winding and fixing are carried out to fixedly install the column tube 1 on the detection instrument. During the detection process, the flow of the object to be detected will drive the movement of the stationary phase 110 during the detection process. Furthermore, the restriction tube 12 can better fix the stationary phase 110, making the stationary phase 110 evenly distributed in the restriction tube 12, thereby making the detection more accurate. At the same time, when the stationary phase 110 decreases, it can be supplemented through the storage cavity 13, making the filled stationary phase 110 more stable, and at the same time making the service life longer and better improving the usage time.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gas chromatography packed column, characterized in that: include: Column tube (1); as well as, The column tube (1) has an air inlet end and an air outlet end at both ends, and the air inlet end and the air outlet end are filled with a plugging cotton layer (10); A limiting tube (12) is fixedly arranged inside the column tube (1), the limiting tube (12) and the inner wall of the column tube (1) form a double-layer structure, and the limiting tube (12) is a connected multi-section tube, the interior of the column tube (1) is divided into multiple sections by the limiting tube (12), and the interior of the column tube (1) is filled with a stationary phase (110).

2. The gas chromatography packed column according to claim 1, characterized in that: A filling cavity (11) is provided inside the column tube (1), and the filling cavity (11) is filled with a stationary phase (110). The stationary phase (110) has a mesh size of 70-90.

3. The gas chromatography packed column according to claim 1, characterized in that: The limiting tube (12) is dumbbell-shaped, and the protruding rings at both ends of the limiting tube (12) are fixedly connected to the inner wall of the column tube (1), so that the limiting tube (12) and the column tube (1) form a double wall.

4. The gas chromatography packed column according to claim 3, characterized in that: The limiting tube (12) is a connecting tube, and a plurality of separation plates (121) are evenly arranged inside the limiting tube (12), and the separation plates (121) are of a leaky mesh structure, and a plurality of identical sections are formed inside the limiting tube (12) through the separation plates (121).

5. The gas chromatography packed column according to claim 4, characterized in that: The outer wall of the limiting tube (12) is penetrated by a feeding hole (120), and a storage cavity (13) is formed between the limiting tube (12) and the inner wall of the column tube (1), and the storage cavity (13) is also filled with a stationary phase (110).

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