Carrier gas purification tank

Abstract

The utility model relates to the technical field of gas detection, in particular to a carrier gas purification tank. The carrier gas purification tank comprises a supporting frame, a plurality of middle connecting rings which are distributed up and down at equal intervals are fixedly installed on the supporting frame, rotating filter rings which are rotationally connected are installed between the adjacent middle connecting rings, a plugging plate is fixedly installed in the rotating filter ring on one side of a middle dividing plate, and arc-shaped cavities which are distributed in the radial direction are formed in the plugging plate; a coaxial threaded through hole is formed in the rotating filter ring corresponding to the arc-shaped cavity, a purification column is inserted into the arc-shaped cavity, and a threaded sealing column used for abutting against the purification column is mounted on the threaded through hole. According to the carrier gas purification tank provided by the utility model, a purification structure capable of being dynamically adjusted is constructed through the plurality of middle connecting rings which are fixed on the support frame and are distributed at equal intervals up and down and the rotating filter rings which are rotatably connected between the adjacent middle connecting rings, and a worker can selectively start the purification columns by rotating the rotating filter rings according to actual analysis requirements.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a carrier gas purification tank. Background Technology

[0002] Gas chromatographs are indispensable precision analytical instruments in modern analytical chemistry and industrial production, widely used in petrochemicals, pharmaceuticals, food safety, and environmental monitoring. The accuracy and repeatability of gas chromatographic analysis largely depend on the purity of the carrier gas, and gas purification devices are key equipment to ensure high carrier gas purity. High-purity carrier gas can significantly improve the resolution and detection sensitivity of chromatographic peaks, extend column life, and reduce baseline drift, which is especially important for trace analysis and high-sensitivity detection. Its performance and reliability directly affect the quality of analytical results and the efficiency of instrument use.

[0003] In modern analytical chemistry and industrial production, gas chromatographs, with their high separation efficiency and high sensitivity, have become indispensable core equipment in scenarios such as petrochemical component analysis, pharmaceutical intermediate detection, food safety pollutant screening, and environmental atmospheric monitoring. The core principle of gas chromatography analysis is to use a carrier gas to carry sample components for separation within a chromatographic column, and finally achieve quantitative and qualitative analysis through a detector. The purity of the carrier gas, as a key influencing factor, directly determines the accuracy and repeatability of the analytical results, as well as the lifespan of the instrument's core components.

[0004] Currently, most mainstream carrier gas purification tanks used in gas chromatographs employ a single purification column or a fixed series of multiple purification columns. A single purification column can only adsorb or remove a certain type of impurity (such as moisture, oxygen, or organic pollutants), making it difficult to meet the multi-dimensional purification needs of complex sample analysis. While fixed series of multiple purification columns can remove multiple impurities, on the one hand, replacing the purification column requires disassembling the entire device, which is cumbersome and can easily lead to air entering the system and compromising the purity of the carrier gas. On the other hand, the requirements for purification accuracy vary in different analytical scenarios.

[0005] Therefore, it is necessary to provide a new carrier gas purification tank to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a carrier gas purification tank.

[0007] The carrier gas purification tank provided by this utility model includes a support frame, on which multiple central rings are fixedly installed at equal intervals, and a central axis dividing plate is fixedly installed on each central ring.

[0008] A rotating filter ring is installed between adjacent intermediate rings, and a center plate is fixedly installed on the rotating filter ring. A sealing plate is fixedly installed inside the rotating filter ring on one side of the center plate, and the sealing plate has radially distributed arc-shaped cavities. The rotating filter ring corresponding to the arc-shaped cavity has a coaxially arranged threaded through hole, and a purification column is inserted into the arc-shaped cavity. A threaded sealing column for abutting the purification column is installed on the threaded through hole.

[0009] Preferably, the middle plate has a mounting cavity coaxially arranged with the threaded through hole, and an external spring component is installed in the mounting cavity.

[0010] Preferably, the outer spring component includes an abutment ring, which is slidably installed in the mounting cavity, and a spring is fixedly installed on the inner ring surface of the abutment ring, the other end of which is fixedly connected to the inner wall of the mounting cavity.

[0011] Preferably, an upper cover plate is fixedly installed on the uppermost connecting ring, and an air intake port is installed on the upper cover plate.

[0012] Preferably, a lower cover plate is fixedly installed on the lowest layer of the middle ring, and an exhaust port is installed on the lower cover plate.

[0013] Preferably, a sealing ring is installed at the rotatable connection between the central ring and the rotating filter ring.

[0014] Compared with related technologies, the carrier gas purification tank provided by this utility model has the following beneficial effects:

[0015] This invention constructs a dynamically adjustable purification structure by using multiple vertically and vertically equidistantly distributed central rings fixed on a support frame and rotating filter rings rotatably connected between adjacent central rings. Operators can selectively activate the purification columns by rotating the rotating filter rings according to actual analytical needs. When multi-dimensional deep purification is required, all rotating filter rings are rotated to the same side as the air inlet of the upper cover plate, making the arc-shaped cavities of each layer of rotating filter rings interconnected. The carrier gas then passes through purification columns with different functions sequentially. When only a single purification function is needed, the rotating filter rings that do not need to be activated are rotated 180°, causing their central dividing plates to misalign with the central axis dividing plates of the central rings, blocking the carrier gas flow through that layer of purification column. Compared to traditional fixed purification structures, this application can adapt to different scenarios from routine analysis to trace analysis, significantly improving the equipment's versatility. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the carrier gas purification tank provided by this utility model;

[0017] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the structure.

[0018] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the connection between the central ring and the rotating filter ring.

[0019] Figure 4 for Figure 2 The diagram shows the structure of the interlocking ring.

[0020] Figure 5 for Figure 1 The diagram shows the structure of the rotating filter ring and the outer spring component.

[0021] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the rotating filter ring.

[0022] The following are the labeling elements in the diagram: 1. Support frame; 2. Middle ring; 21. Central axis dividing plate; 22. Upper cover plate; 221. Air inlet; 23. Lower cover plate; 231. Exhaust port; 3. Rotating filter ring; 3a. Threaded through hole; 31. Middle dividing plate; 31a. Mounting cavity; 32. Sealing plate; 32a. Arc-shaped cavity; 33. Threaded sealing column; 4. Purification column; 5. External spring component; 51. Abutment ring; 52. Spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] Please see Figures 1 to 6 The present invention provides a carrier gas purification tank, which includes a support frame 1, a central ring 2, and a rotating filter ring 3.

[0026] In the embodiments of this utility model, please refer to Figures 1 to 6 Multiple central rings 2 are fixedly installed on the support frame 1, and a central axis dividing plate 21 is fixedly installed on each central ring 2. An upper cover plate 22 is fixedly installed on the uppermost central ring 2, and an air intake port 221 is installed on the upper cover plate 22. A lower cover plate 23 is fixedly installed on the lower cover plate 23, and an exhaust port 231 is installed on the lower cover plate 23.

[0027] A rotating filter ring 3 is installed between adjacent intermediate rings 2, and a middle dividing plate 31 is fixedly installed on the rotating filter ring 3. A sealing plate 32 is fixedly installed inside the rotating filter ring 3 on one side of the middle dividing plate 31, and a radially distributed arc-shaped cavity 32a is opened on the sealing plate 32. A threaded through hole 3a is coaxially arranged on the rotating filter ring 3 corresponding to the arc-shaped cavity 32a, and a purification column 4 is inserted in the arc-shaped cavity 32a. A threaded sealing column 33 for abutting against the purification column 4 is installed on the threaded through hole 3a.

[0028] It should be noted that in this application, when multiple rotating filter rings 3 are rotated to the same side as the air inlet 221, the rotating filter rings 3 are interconnected through the arc-shaped cavity 32a. Then, each purification column 4 is installed into the arc-shaped cavity 32a to achieve gas purification.

[0029] In this embodiment, a three-layer rotating filter ring 3 is used as an example. The top purification column 4 is a highly active metal oxide catalyst, mainly made of copper oxide or palladium-based catalyst in a column structure. It can efficiently catalyze the reaction of trace oxygen in hydrogen with hydrogen to produce water at room temperature. The generated water is then adsorbed by activated carbon to ensure the high purity of hydrogen and prevent oxidative damage to the chromatographic column. The middle purification column 4 is made of molecular sieve and activated carbon. The molecular sieve mainly adsorbs moisture and carbon dioxide in the air, while the activated carbon effectively removes various organic pollutants and odor substances, ensuring that the air used as a carrier gas or auxiliary gas will not introduce interfering peaks. The bottom purification column 4 is made of copper-based deoxidizer and desiccant in a column structure. The desiccant layer used with the copper-based deoxidizer at room temperature can effectively remove moisture and provide a high-purity inert carrier gas environment.

[0030] It should also be noted that: according to the requirements, the unnecessary rotating filter ring 3 can be rotated 180°, and the gas inside it will not pass through the purification column 4. Therefore, gas purification can be carried out according to actual needs.

[0031] In this embodiment, a sealing ring is installed at the rotatable connection between the central ring 2 and the rotating filter ring 3 to prevent gas leakage at the connection. In order to prevent the rotating filter ring 3 from rotating arbitrarily, a damping pad can be set on the central ring 2. In order to facilitate the rotation of the rotating filter ring 3, scale lines are set on the rotating filter ring 3 to avoid the potential risk of misalignment between the rotation of the rotating filter ring 3 and the central ring 2, which would cause the central axis dividing plate 21 and the central dividing plate 31 to rotate inconsistently.

[0032] In the embodiments of this utility model, please refer to Figures 1 to 6The center plate 31 has an installation cavity 31a coaxially arranged with the threaded through hole 3a, and an external spring component 5 is installed in the installation cavity 31a. The external spring component 5 includes an abutment ring 51, which is slidably installed in the installation cavity 31a. A spring 52 is fixedly installed on the inner ring surface of the abutment ring 51, and the other end of the spring 52 is fixedly connected to the inner wall of the installation cavity 31a.

[0033] It should be noted that when installing the purification column 4, the purification column 4 is inserted from the threaded through hole 3a into the arc-shaped cavity 32a and slid along the inside of the arc-shaped cavity 32a. Then, the threaded sealing column 33 is pressed against the outer end of the purification column 4 and driven to make the threaded sealing column 33 and the threaded through hole 3a threadedly fixed. At this time, the internal pressure of the purification column 4 presses against the abutment ring 51 and causes the spring 52 to be compressed. When replacing the purification column 4, simply unscrew the threaded sealing column 33, and the spring 52 can push part of the purification column 4 out of the threaded through hole 3a through the abutment ring 51 so that the staff can quickly take it out.

[0034] The working principle of the carrier gas purification tank provided by this utility model is as follows:

[0035] This application constructs a dynamically adjustable purification structure by using multiple vertically and vertically equidistantly distributed central rings 2 fixed on a support frame 1, and rotating filter rings 3 rotatably connected between adjacent central rings 2. Operators can selectively activate the purification columns 4 by rotating the rotating filter rings 3 according to actual analytical needs. When multi-dimensional deep purification is required, all rotating filter rings 3 are rotated to the same side as the air inlet 221 of the upper cover plate 22, making the arc-shaped cavities 32a of each layer of rotating filter rings 3 interconnected. The carrier gas passes sequentially through purification columns 4 with different functions (such as the upper copper oxide catalyst column for oxygen removal, the middle molecular sieve-activated carbon column for water and organic pollutant removal, and the lower copper-based deoxidizer-desiccant column for deep purification). When only a single purification function is needed, the rotating filter rings 3 that do not need to be activated are rotated 180°, causing their central dividing plates 31 to be misaligned with the central axis dividing plates 21 of the central rings 2, blocking the carrier gas flow through that layer of purification column 4. Compared with traditional fixed purification structures, this application can adapt to different scenarios from routine analysis to trace analysis, significantly improving the versatility of the equipment.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A carrier gas purification tank, characterized in that, Includes a support frame (1), on which multiple central rings (2) are fixedly installed at equal intervals, and each central ring (2) is fixedly installed with a central axis dividing plate (21). A rotating filter ring (3) is installed between adjacent intermediate rings (2), and a center plate (31) is fixedly installed on the rotating filter ring (3). A sealing plate (32) is fixedly installed in the rotating filter ring (3) on one side of the center plate (31), and a radially distributed arc-shaped cavity (32a) is opened on the sealing plate (32). A threaded through hole (3a) is coaxially arranged on the rotating filter ring (3) corresponding to the arc-shaped cavity (32a), and a purification column (4) is inserted in the arc-shaped cavity (32a). A threaded sealing column (33) for abutting the purification column (4) is installed on the threaded through hole (3a).

2. The carrier gas purification tank according to claim 1, characterized in that, The middle plate (31) has an installation cavity (31a) coaxially arranged with the threaded through hole (3a), and an external spring component (5) is installed in the installation cavity (31a).

3. The carrier gas purification tank according to claim 2, characterized in that, The outer spring component (5) includes an abutment ring (51), which is slidably installed in the mounting cavity (31a), and a spring (52) is fixedly installed on the inner ring surface of the abutment ring (51), and the other end of the spring (52) is fixedly connected to the inner wall of the mounting cavity (31a).

4. The carrier gas purification tank according to claim 1, characterized in that, An upper cover plate (22) is fixedly installed on the uppermost ring (2), and an air inlet (221) is installed on the upper cover plate (22).

5. The carrier gas purification tank according to claim 4, characterized in that, A lower cover plate (23) is fixedly installed on the bottommost middle ring (2), and an exhaust port (231) is installed on the lower cover plate (23).

6. The carrier gas purification tank according to claim 1, characterized in that, A sealing ring is installed at the rotatable connection between the central ring (2) and the rotating filter ring (3).

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