Quick filter bottle for chromatographic analysis

Abstract

The utility model belongs to the technical field of laboratory appliances, and relates to a quick filter bottle for chromatographic analysis, which comprises an outer tube, an inner insertion tube, a tube cap and a filter membrane, the inner insertion tube is inserted in the outer tube, and the tube cap is mounted at the top of the inner insertion tube. The inner intubation tube comprises an inner intubation tube body and a circle of outer brim arranged at the lower end of the inner intubation tube body, the outer brim and the bottom of the inner intubation tube body jointly form an embedding groove, a membrane pressing ring is embedded in the embedding groove, and the membrane pressing ring is used for pressing a filter membrane at the bottom of the inner intubation tube body. The quick filter bottle for chromatographic analysis is scientific and reasonable in design, has the advantages of being good in filtering effect, simple in structure and easy to implement, and has high innovativeness.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory supplies and relates to a filtration device, specifically a rapid filter bottle for chromatographic analysis. Background Technology

[0002] In chromatographic analysis, the experimental samples are usually filtered to prevent impurities from entering the instrument and column and causing blockage.

[0003] A rapid filtration bottle is a device for filtering samples for chromatographic analysis. It generally consists of an outer tube, an inner tube, a cap, and a filter membrane mounting base. The filter membrane mounting base has a circular groove structure with perforations on the bottom of the groove and the bottom of the inner tube. The filter membrane mounting base is fitted onto the bottom of the inner tube, and the cap is installed at the top of the inner tube. The filter membrane mounting base is used to install a 0.2µm or 0.45µm filter membrane at the bottom of the inner tube. During sample processing, the sample is placed in the outer tube, and then the inner tube is inserted into the outer tube and slowly pushed downwards, allowing the filtrate sample to pass through the filter membrane from bottom to top into the inner tube until the inner tube is pushed to the bottom of the outer tube, thus completing the sample filtration.

[0004] The existing rapid filtration bottle has the following problem: when the inner tube is pushed down, the sample can easily enter the inner tube through the gap between the filter membrane mounting base and the inner tube. This part of the liquid is not filtered by the filter membrane, resulting in poor filtration effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rapid filtration bottle for chromatographic analysis that has good filtration effect, simple structure, and is easy to implement.

[0006] The technical problem solved by this utility model is achieved through the following technical solution:

[0007] A rapid filtration bottle for chromatographic analysis includes an outer tube, an inner tube, a cap, and a filter membrane. The inner tube is inserted into the outer tube, and a cap is installed on the top of the inner tube. The bottle is characterized by further including a membrane pressing ring. The inner tube includes an inner tube body and an outer rim at the lower end of the inner tube body. The outer rim and the bottom of the inner tube body together form an insert groove. The membrane pressing ring is installed in the insert groove to press the filter membrane onto the bottom of the inner tube body.

[0008] Furthermore, the bottom of the inner tube body is provided with a leakage hole, and a connecting platform is provided between the leakage hole and the inner wall of the inner tube, and the pressure ring is pressed onto the connecting platform.

[0009] Moreover, the filter membrane is the same size as the bottom of the inner cannula body.

[0010] Furthermore, a sealing protrusion is provided on the outer wall of the inner cannula body.

[0011] Moreover, the pressure ring is a circular ring.

[0012] Moreover, the pressure ring is composed of a circular ring body and cross ribs arranged inside the circular ring body.

[0013] The advantages and positive effects of this utility model are:

[0014] 1. This chromatographic rapid filtration bottle, by designing the outer-type filter membrane mounting base as an embedded pressure ring, effectively avoids the problem of liquid sample seeping into the gap between the filter membrane mounting base and the inner tube, thus ensuring the reliability of filtration.

[0015] 2. This chromatographic analysis rapid filtration bottle features a sealing protrusion on the inner tube. When pushed in, this protrusion adheres tightly to the inner wall of the outer tube, ensuring that the liquid sample can be forced through the filter membrane into the inner tube, thereby pressurizing and improving filtration efficiency and effectiveness.

[0016] 3. This utility model has a scientific and reasonable design, with the advantages of good filtration effect, simple structure and easy implementation. It is a highly innovative filtration bottle for chromatographic analysis. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the inner tube and cap of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal insertion tube of this utility model;

[0021] Figure 5 This is a schematic diagram of the pressure ring structure of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Cap, 2-Inner tube, 3-Outer tube, 4-Pressure ring, 5-Insertion groove, 6-Sealing protrusion, 7-Filter membrane, 8-Leakage hole, 9-Ring body, 10-Cross rib, 11-Connecting platform. Detailed Implementation

[0024] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0025] A rapid filtration bottle for chromatographic analysis includes an outer tube 3, an inner tube 2, a cap 1, and a filter membrane 7. The inner tube is inserted into the outer tube, and a cap is installed on the top of the inner tube. Its innovation lies in the fact that it also includes a membrane pressing ring 4. The inner tube includes an inner tube body and an outer rim provided at the lower end of the inner tube body. The outer rim and the bottom of the inner tube body together form an inserting groove 5. The membrane pressing ring is embedded in the inserting groove and is used to press the filter membrane onto the bottom of the inner tube body.

[0026] The bottom of the inner tube body has a leakage hole 8 for the filtered liquid to enter the inner tube. A connecting platform 11 is provided between the leakage hole and the inner wall of the inner tube, and the pressure membrane ring is pressed onto the connecting platform. The filter membrane is the same size as the bottom of the inner tube body.

[0027] Because the filter membrane completely covers the bottom of the inner tube, and the edge of the filter membrane is pressed and fixed by the membrane pressing ring, and because the membrane pressing ring and the insert groove are tightly fitted, liquid will not seep in; even if liquid seeps in, the membrane pressing ring is pressed against the connecting platform, which can also block the seeping liquid; furthermore, even if liquid seeps in, the liquid will be filtered by the filter membrane, so the filtration effect can be guaranteed.

[0028] A sealing protrusion 6 is provided on the outer wall of the inner tube body. When it is pushed in, the sealing protrusion can fit tightly against the inner wall of the outer tube, ensuring that the liquid sample can be pressed into the inner tube through the filter membrane, thereby increasing the pressure and improving the filtration efficiency and effect.

[0029] In this embodiment, the membrane pressing ring has two structural forms: one is a circular ring body 9 that presses the edge of the filter membrane; the other is a structure with a cross rib 10 set in the circular ring body. This structure can not only press the edge of the filter membrane, but also press the middle of the filter membrane through the cross rib. At the same time, the setting of the cross rib can also avoid the deformation of the circular ring body and enhance the reliability of filtration.

[0030] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A rapid filtration bottle for chromatographic analysis, comprising an outer tube, an inner tube, a cap, and a filter membrane, wherein the inner tube is inserted into the outer tube, and a cap is installed at the top of the inner tube, characterized in that: It also includes a membrane pressing ring. The inner tube includes an inner tube body and an outer rim provided at the lower end of the inner tube body. The outer rim and the bottom of the inner tube body together form an inserting groove. A membrane pressing ring is installed in the inserting groove. The membrane pressing ring is used to press the filter membrane onto the bottom of the inner tube body.

2. The rapid filtration bottle for chromatographic analysis according to claim 1, characterized in that: The bottom of the inner cannula body is provided with a leakage hole, and a connecting platform is provided between the leakage hole and the inner wall of the inner cannula, and the pressure ring is pressed onto the connecting platform.

3. The rapid filtration bottle for chromatographic analysis according to claim 1, characterized in that: The filter membrane is the same size as the bottom of the inner cannula body.

4. The rapid filtration bottle for chromatographic analysis according to claim 1, characterized in that: A sealing protrusion is provided on the outer wall of the inner cannula body.

5. A rapid filtration bottle for chromatographic analysis according to claim 1, characterized in that: The pressure ring is a circular ring.

6. A rapid filtration bottle for chromatographic analysis according to claim 1, characterized in that: The pressure ring is composed of a circular ring body and cross ribs arranged inside the circular ring body.

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