Mounting device for liquid chromatographic column

Abstract

The utility model discloses a mounting device for a liquid chromatographic column, which particularly belongs to the technical field of chromatographic column mounting and comprises a fixing plate, a connecting rod, an upper positioning and mounting mechanism and a lower positioning and mounting mechanism for positioning the lower end of the chromatographic column. The upper positioning and mounting mechanism comprises a mounting ring, a propping bolt and a fixed propping sheet which is propped against the chromatographic column; one end of the connecting rod is fixed with the fixing plate, and the other end of the connecting rod is fixed with the mounting ring; a threaded hole matched with the abutting bolt is formed in the side end of the mounting ring, and the end, screwed into the threaded hole, of the abutting bolt is fixed to the fixing abutting piece. The mounting device can be used for fixing the chromatographic columns with different diameters, is simple in structure, and can be hung or pasted on an original instrument for use.

Description

Technical Field

[0001] The utility model belongs to the technical field of chromatographic column installation, and in particular relates to an installation device used for a liquid chromatographic column. Background Art

[0002] In the experimental analysis of liquid chromatography, the liquid chromatography column used in the instrument needs to be installed and fixed in the column oven. As the instrument hardware ages, the fixture used to fix the chromatographic column on the original instrument breaks due to aging. Therefore, in the laboratory, the chromatographic column is not actually fixed and often leans against the side of the instrument.

[0003] To this end, Chinese utility model patent CN2020210254414 discloses a new type of liquid chromatography column connector, which fixes the chromatographic column through a fastening ring. In the application analysis of the above scheme, the following disadvantages still exist: 1. The outer diameter of the commonly used chromatographic column is 6-8mm. For chromatographic columns with a large diameter of more than 11mm, the above liquid chromatography column connector cannot be well adapted; 2. The structure provided by the above scheme is too complicated, which is not conducive to operation, and it needs to be used in combination with the original instrument as much as possible, otherwise it will lead to too high a modification cost and is not conducive to implementation. Summary of the invention

[0004] The utility model aims to provide a mounting device for a liquid chromatography column, which can be used to fix chromatography columns of different diameters, has a simple structure, and can be hung or pasted on an original instrument for use.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mounting device for a liquid chromatography column comprises a fixing plate, a connecting rod, an upper positioning mounting mechanism and a lower positioning mounting mechanism for positioning the lower end of the chromatography column; the upper positioning mounting mechanism comprises a mounting ring, a tightening bolt and a fixing abutment for tightening against the chromatography column; one end of the connecting rod is fixed to the fixing plate, and the other end is fixed to the mounting ring; a threaded hole adapted to the tightening bolt is provided at a side end of the mounting ring, and one end of the tightening bolt is screwed into the threaded hole and fixed to the fixing abutment.

[0007] When the staff needs to position the chromatographic column, they can rotate the tightening bolt to tighten the end of the bolt fixed to the fixing plate 8 against the side of the chromatographic column, thereby fixing the chromatographic column. There are at least three tightening bolts 4, each with an angle of 120°, and they are tightened against the side wall of the chromatographic column from three angles.

[0008] Preferably, the upper positioning installation mechanism further comprises a soft positioning block, and the soft positioning block is bonded and fixed to the fixed abutment sheet.

[0009] The positioning soft block can be bonded and fixed to the fixed abutment. In fact, the hook surface of Velcro can be pasted on the free end surface of the fixed abutment, and the positioning soft block is provided with a rough surface, so as to achieve Velcro-like bonding and fixation. When the tightening bolt rotates, the positioning soft block indirectly fixed with it will also rotate, but it is unknown whether it rotates to an angle that fits the curved side of the chromatographic column. Therefore, the positioning soft block can use a soft rubber pad, so that when it is pressed tightly by force, the positioning soft block will undergo a small deformation, so that it can be more tightly pressed against the side of the chromatographic column.

[0010] Preferably, the positioning soft block is provided with a friction-increasing rib at one end facing the chromatographic column.

[0011] The friction-increasing ribs can increase the friction between the side of the chromatographic column and avoid sliding between the positioning soft block and the side wall of the chromatographic column when the tightening bolt is rotated to apply pressure.

[0012] Preferably, a rotating handle is provided at one end of the tightening bolt facing away from the fixed retaining plate.

[0013] The rotating handle is provided to make it more convenient for the user to apply force.

[0014] Preferably, the lower positioning installation mechanism comprises a positioning seat, the positioning seat is provided with a positioning groove, and the positioning groove is plugged and fixed to the Peek head at the end of the chromatographic column.

[0015] The positioning seat is actually a large tray, and the Peek head at the end of the chromatographic column is embedded in the positioning groove to achieve fixation. The main force point for fixing the chromatographic column is still on the upper positioning mechanism. In actual applications, the diameter of the positioning groove is larger than the size of the Peek head at the end of the chromatographic column. The fixation of the chromatographic column is achieved by the positioning seat supporting the end and clamping the upper positioning mechanism.

[0016] Preferably, there are two connecting rods, and except for one connecting rod fixed to the mounting ring, two ends of the other connecting rod are respectively fixed to the fixing plate and the positioning seat.

[0017] Preferably, the positioning seat is provided with a through groove for the PEEK tube to pass through.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. After the tightening bolt is screwed in, the chromatographic columns of different diameters can be tightened and fixed. It is suitable for conventional 6-8mm chromatographic columns and also for large 11mm chromatographic columns.

[0020] 2. The structure is simple, which is more conducive to application. The chromatographic column can be fixed by simply fixing the fixing plate on the instrument without changing the structure of the original instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a mounting device for a liquid chromatography column (front view);

[0022] Figure 2 A schematic diagram of the structure of a mounting device for a liquid chromatography column (side view);

[0023] Figure 3 for Figure 2 Enlarged view of part A in .

[0024] In the figure: 1. Peek head, 2. Mounting ring, 3. Rotating handle, 31. Positioning soft block, 4. Tightening bolt, 5. Fixing plate, 6. Positioning seat, 7. Connecting rod, 8. Fixing piece, 9. Aligning column. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] From the perspective of application, this embodiment again makes the following additional explanations on the installation device used for the liquid chromatography column:

[0027] A mounting device for a liquid chromatography column, the main body of which comprises a fixing plate (5)

[0028] Connecting rod (7);

[0029] Upper positioning installation mechanism;

[0030] The upper positioning and mounting mechanism comprises a mounting ring (2), a tightening bolt (4), a fixing abutment sheet (8) for tightening against the chromatographic column (9), and a positioning soft block (31);

[0031] The lower positioning installation mechanism comprises a positioning seat (6).

[0032] The above-mentioned installation device is applicable to two application scenarios: vertically installed chromatographic columns and horizontally installed chromatographic columns. The staff can choose the appropriate installation method according to the actual situation, and fix the fixing plate on the instrument by hanging or bonding, so as to fix the chromatographic column.

Claims

1. A mounting device for a liquid chromatography column, comprising a fixing plate (5) and a connecting rod (7), characterized in that: It also includes an upper positioning and mounting mechanism and a lower positioning and mounting mechanism for positioning the lower end of the chromatographic column (9); The upper positioning and mounting mechanism comprises a mounting ring (2), a tightening bolt (4), and a fixing abutment sheet (8) for tightening against the chromatographic column (9); One end of the connecting rod (7) is fixed to the fixing plate (5), and the other end is fixed to the mounting ring (2); A threaded hole adapted to the holding bolt (4) is provided at the side end of the mounting ring (2); one end of the holding bolt (4) screwed into the threaded hole is fixed to the fixing holding plate (8).

2. The installation device for a liquid chromatography column according to claim 1, characterized in that: The upper positioning installation mechanism further comprises a positioning soft block (31), and the positioning soft block (31) is bonded and fixed to the fixing abutment sheet (8).

3. The installation device for a liquid chromatography column according to claim 2, characterized in that: The end of the positioning soft block (31) facing the chromatographic column (9) is provided with a friction-increasing rib.

4. The installation device for a liquid chromatography column according to claim 2, characterized in that: A rotating handle (3) is provided at one end of the tightening bolt (4) facing away from the fixed retaining plate (8).

5. The installation device for a liquid chromatography column according to claim 1, characterized in that: The lower positioning installation mechanism comprises a positioning seat (6), the positioning seat (6) being provided with a positioning groove, and the positioning groove is plugged and fixed to the Peek head (1) at the end of the chromatographic column (9).

6. The installation device for a liquid chromatography column according to claim 1, characterized in that: There are two connecting rods (7), one of which is fixed to the mounting ring (2), and two ends of the other connecting rod (7) are respectively fixed to the fixing plate (5) and the positioning seat (6).

7. The installation device for a liquid chromatography column according to claim 1, characterized in that: The positioning seat (6) is provided with a through groove for the PEEK tube to pass through.

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