A liquid chromatography column with easily replaceable frits

Abstract

The utility model relates to the technical field of chromatographic column, concretely to a liquid chromatographic column that screen plate is easy to replace, including chromatographic column main part and connecting component, be provided with the communicating pipe on chromatographic column main part, be provided with screen plate at the port department of communicating pipe, connecting component includes the installation ring of setting in the screen plate perimeter, the sleeve of coaxial setting on the installation ring, four annular array distribution slide block on the sleeve, the fixed cylinder of coaxial setting on communicating pipe, four set up on fixed cylinder and provide the sliding slot of slide block, set up on fixed cylinder and with the clamping groove of sliding slot intercommunication, set up on the first magnet of slide block and second magnet in the clamping groove inside, the end face of installation ring and communicating pipe each other adhesion, first magnet and second magnet magnetism connects. The utility model not only is convenient for the replacement operation to screen plate, can also avoid the condition that screen plate is easy to loosen and fall off, improve the use convenience of chromatographic column.

Description

Technical Field

[0001] This utility model relates to the field of chromatography column technology, and in particular to a liquid chromatography column with an easily replaceable sieve plate. Background Technology

[0002] As the core separation unit of a liquid chromatography system, the chromatographic column achieves efficient separation based on the differences in the partition coefficients of sample components between the mobile and stationary phases through a carefully designed stationary phase structure and optimized distribution mechanism. The sieve plate, a key component of the column, is located at the column inlet and outlet, serving the dual functions of optimizing mobile phase distribution and protecting the stationary phase. Its specific pore size effectively intercepts particulate impurities while ensuring uniform passage of the mobile phase through the packing layer, minimizing the external volume effect.

[0003] Chinese patent CN218481475U discloses a liquid chromatography column, including a body, a sieve plate, and a fixing cap. The body is a hollow column with openings at both ends along its axial direction. The body includes a body segment, a fixing segment, and a connecting segment coaxially connected in sequence along its axial direction. At least a portion of the connecting segment is covered by the sieve plate. The fixing cap has a cavity for accommodating the sieve plate, and the fixing segment is threadedly connected to the fixing cap. The sieve plate in this liquid chromatography column is easy to replace.

[0004] However, the above technical solution has the following shortcomings: the liquid chromatography column avoids the situation where the sieve plate is tightly attached to the fixed cap under high pressure by fitting the cap body into the connecting section. However, fixing the cap body and sieve plate by means of socket fitting is prone to loosening and deflection of the cap body from the connecting section under high pressure due to loose connection, thus failing to guarantee the stability of the sieve plate. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a liquid chromatography column with an easily replaceable sieve plate. This not only facilitates the replacement of the sieve plate but also prevents the sieve plate from loosening and falling off, thus improving the ease of use of the chromatography column.

[0006] The present invention provides a liquid chromatography column with an easily replaceable sieve plate, comprising a column body and a connecting assembly; a connecting tube is provided on the column body, and a sieve plate is provided at the port of the connecting tube; the connecting assembly includes a mounting ring disposed on the periphery of the sieve plate, a sleeve coaxially disposed on the mounting ring, four sliders arranged in an annular array on the sleeve, a fixed cylinder coaxially disposed on the connecting tube, four grooves disposed on the fixed cylinder for sliding of the sliders, a slot disposed on the fixed cylinder and communicating with the grooves, a first magnet disposed on the sliders, and a second magnet disposed inside the slots; the mounting ring and the end face of the connecting tube are in close contact with each other, and the first magnet and the second magnet are magnetically connected.

[0007] Preferably, the slider is a T-shaped structure with an arc surface, and the groove and the slider are adapted to each other.

[0008] Preferably, the sleeve and the fixed sleeve are fitted together.

[0009] Preferably, a fixing cap is provided on the connecting pipe, the fixing cap abuts against the mounting ring, and the fixing cap and the sleeve fit together.

[0010] Preferably, the fixing cap has an inner cavity and a channel inside, and the connecting tube, the channel and the inner cavity are connected in sequence.

[0011] Preferably, the fixing cap is provided with a threaded cylinder, the connecting pipe has a threaded part, and the threaded cylinder is threadedly connected to the threaded part.

[0012] Preferably, a limiting ring is coaxially provided on the connecting pipe, and the threaded cylinder and the limiting ring abut against each other.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] This utility model, through its fixed mechanism, not only enables quick replacement of the sieve plate, but also prevents the sieve plate from loosening or deflecting during operation by utilizing the abutment effect of the inner wall of the slot and the magnetic attraction of the first and second magnets. Furthermore, it prevents the sieve plate from falling off when the fixing cap is removed, avoiding the drawback of difficulty in removing the sieve plate from the cavity of the fixing cap. This ensures the smooth progress of experiments or production, and the operation is simple and convenient, demonstrating excellent practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the present invention;

[0017] Figure 3 This is a structural cross-sectional view of an embodiment of the present utility model;

[0018] Figure 4 for Figure 2 A partially enlarged schematic diagram of the structure at point A;

[0019] Figure 5 This is a schematic diagram of the structure of the fixing cylinder of this utility model.

[0020] Reference numerals in the attached figures: 1. Column body; 2. Connecting tube; 3. Mounting ring; 4. Sieve plate; 5. Sleeve; 6. Slider; 7. First magnet; 8. Fixing cylinder; 9. Slide groove; 10. Slot; 11. Second magnet; 12. Fixing cap; 13. Threaded cylinder; 14. Threaded part; 15. Limiting ring; 16. Inner cavity; 17. Channel. Detailed Implementation

[0021] Example 1

[0022] like Figure 1 - Figure 5 As shown, this embodiment proposes a liquid chromatography column with an easily replaceable sieve plate, including a column body 1 and a connecting assembly; a connecting tube 2 is provided on the column body 1, a sieve plate 4 is provided at the port of the connecting tube 2, and a fixing cap 12 is provided on the connecting tube 2.

[0023] The connecting assembly includes a mounting ring 3 disposed on the periphery of the sieve plate 4, a sleeve 5 coaxially disposed on the mounting ring 3, four sliders 6 arranged in a ring array on the sleeve 5, a fixed cylinder 8 coaxially disposed on the connecting pipe 2, four sliding grooves 9 disposed on the fixed cylinder 8 for the sliders 6 to slide, a slot 10 disposed on the fixed cylinder 8 and communicating with the sliding grooves 9, a first magnet 7 disposed on the sliders 6, and a second magnet 11 disposed inside the slot 10; the mounting ring 3 and the end face of the connecting pipe 2 are in contact with each other, the first magnet 7 and the second magnet 11 are magnetically connected, the slider 6 is T-shaped with an arc surface, the sliding grooves 9 are adapted to the sliders 6, and the sleeve 5 and the fixed cylinder 8 are in contact with each other.

[0024] In this embodiment, when the sieve plate 4 needs to be installed, first align the slider 6 on the sleeve 5 with the groove 9 of the fixed cylinder 8 and insert it into the groove 9. Then push the sleeve 5 to slide along the axial direction against the fixed cylinder 8. When the slider 6 abuts against the end of the groove 9, rotate the sleeve 5. The sleeve 5 drives the slider 6 to rotate into the slot 10 until it can no longer rotate. At this time, the first magnet 7 and the second magnet 11 magnetically attract each other to fix the sleeve 5. The abutment effect of the inner wall of the slot 10 and the magnetic attraction prevent the sleeve 5 from loosening or deflecting under high pressure. At the same time, when disassembling the sieve plate 4, it will not fall off along with the removal of the fixed cap 12, avoiding the disadvantage of difficulty in removing the sieve plate 4 from the cavity of the fixed cap 12. This ensures the smooth progress of the experiment or production, and the operation is simple and convenient, with good practicality.

[0025] Example 2

[0026] like Figure 1 - Figure 3As shown, this embodiment proposes a liquid chromatography column with an easily replaceable sieve plate. Compared with Embodiment 1, in this embodiment, the fixing cap 12 and the mounting ring 3 abut against each other, the fixing cap 12 and the sleeve 5 fit together, and the fixing cap 12 is provided with an inner cavity 16 and a channel 17. The connecting pipe 2, the channel 17 and the inner cavity 16 are connected in sequence.

[0027] The fixed cap 12 is provided with a threaded cylinder 13, the connecting pipe 2 has a threaded part 14, the threaded cylinder 13 is threadedly connected to the threaded part 14, and a limit ring 15 is coaxially provided on the connecting pipe 2, with the threaded cylinder 13 and the limit ring 15 abutting against each other.

[0028] In this embodiment, the mounting ring 3 and the side of the sieve plate 4 facing away from the connecting pipe 2 are fixed by the fixing cap 12. When installing the fixing cap 12, the fixing cap 12 is first put into the connecting pipe 2, and then the threaded cylinder 13 is screwed into the threaded part 14 until the end face of the threaded cylinder 13 is in contact with the limiting ring 15. At this time, the threaded cylinder 13 is screwed into the threaded part 14, and the bottom inner wall of the fixing cap 12 abuts against the mounting ring 3, thereby completing the installation operation. When using this chromatographic column, under high pressure, the fluid mixed with the target substance passes through the filter holes of the filter on the sieve plate 4, enters the inner cavity 16 through the channel 17, and finally flows out of the inner cavity 16 and into the collection bottle.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A liquid chromatography column with easily replaceable sieve plates, characterized in that, include: A chromatographic column body (1) is provided with a connecting tube (2), and a sieve plate (4) is provided at the port of the connecting tube (2); The connecting assembly includes a mounting ring (3) disposed on the circumference of the sieve plate (4), a sleeve (5) coaxially disposed on the mounting ring (3), four sliders (6) arranged in an annular array on the sleeve (5), a fixed cylinder (8) coaxially disposed on the connecting pipe (2), four sliding grooves (9) disposed on the fixed cylinder (8) for sliding of the sliders (6), a slot (10) disposed on the fixed cylinder (8) and communicating with the sliding grooves (9), a first magnet (7) disposed on the slider (6), and a second magnet (11) disposed inside the slot (10); the mounting ring (3) and the end face of the connecting pipe (2) are in contact with each other, and the first magnet (7) and the second magnet (11) are magnetically connected.

2. The liquid chromatography column with easily replaceable sieve plates according to claim 1, characterized in that, The slider (6) is a T-shaped structure with an arc surface, and the groove (9) is adapted to the slider (6).

3. The liquid chromatography column with easily replaceable sieve plates according to claim 1, characterized in that, The sleeve (5) and the fixed sleeve (8) fit together.

4. The liquid chromatography column with easily replaceable sieve plates according to claim 1, characterized in that, A fixing cap (12) is provided on the connecting pipe (2). The fixing cap (12) abuts against the mounting ring (3), and the fixing cap (12) and the sleeve (5) fit together.

5. A liquid chromatography column with easily replaceable sieve plates according to claim 4, characterized in that, The fixed cap (12) has an inner cavity (16) and a channel (17) inside, and the connecting pipe (2), the channel (17) and the inner cavity (16) are connected in sequence.

6. A liquid chromatography column with easily replaceable sieve plates according to claim 4, characterized in that, The fixing cap (12) is provided with a threaded cylinder (13), and the connecting pipe (2) has a threaded part (14). The threaded cylinder (13) is threadedly connected to the threaded part (14).

7. A liquid chromatography column with easily replaceable sieve plates according to claim 6, characterized in that, A limiting ring (15) is coaxially provided on the connecting pipe (2), and the threaded cylinder (13) and the limiting ring (15) abut against each other.

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