Detachable liquid chromatographic column

Abstract

The utility model discloses a detachable liquid chromatographic column which comprises a column tube and two column caps, the number of the column caps is two, the column caps are respectively in threaded connection with two ends of the column tube, an integrally formed boss is mounted on the inner wall of the column tube, a filter plate body is arranged at the top of the boss, and an annular pressing sleeve is fixedly connected onto the inner wall of each column cap; square grooves are symmetrically formed in the top of the filter plate body, and supporting grooves communicated with the filter plate body are symmetrically formed in the two sides, corresponding to the inner walls of the square grooves, of the filter plate body. The detachable liquid chromatographic column is reasonable in structural design, convenient to use, capable of achieving rapid disassembly and assembly of all the components, free of tools during operation, capable of improving convenience of a user during work, good in overall structural strength, high in installation sealing performance, not prone to extrusion deformation, not prone to leakage of internal filler, long in service life and suitable for popularization and application. And the use requirements can be comprehensively met.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic columns, in particular to a detachable liquid chromatographic column. Background Art

[0002] Chromatography is a separation and analysis method, with separation as the core, so the chromatographic column that is responsible for separation is the heart of the chromatographic system. The requirements for chromatographic columns are high column efficiency, good selectivity, and fast analysis speed.

[0003] Patent document CN201922222602.2 discloses "a detachable liquid chromatography column", including a column tube, the column tube is filled with fillers, an annular fixing seat is provided at the outer wall of both ends of the column tube, a fixing ring is installed at each fixing seat, the inner side of the fixing ring is provided with a mounting slot, the mounting slot is adapted to the fixing seat, the fixing ring is fixedly connected with the column cap by bolts, a plug body is provided at one end of the column cap, the plug body is inserted into the column tube, a number of evenly distributed liquid channels are provided in the plug body, an annular sealing groove is provided at the outer wall of the plug body, a sealing ring is provided in the sealing groove, a plug is threadedly connected at the other end of the column cap, a cavity is provided on the column cap, the plug is installed in the cavity, and a filter is provided between the end of the plug and the bottom wall of the cavity, a liquid inlet and outlet are provided at the center of the plug, the liquid inlet and outlet are communicated with the cavity, and the cavity is communicated with the liquid channel. The liquid chromatography column of the utility model is convenient to assemble and disassemble, and it is convenient to replace the internal components.

[0004] This patent requires bolts to assemble the components, so tools are needed for disassembly. At the same time, the filter plate is set inside the column cap, which is inconvenient to take out even after the plug is removed. Therefore, the disassembly process is still not very convenient. For this reason, we propose a detachable liquid chromatography column to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to provide a detachable liquid chromatography column to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a detachable liquid chromatography column, comprising a column tube and a column cap, wherein the column caps are two in number and are respectively threadedly connected to the two ends of the column tube, an integrally formed boss is installed on the inner wall of the column tube, a filter plate body is provided on the top of the boss, and an annular pressing sleeve is fixedly connected to the inner wall of the column cap;

[0007] A square groove is symmetrically provided on the top of the filter plate body, and supporting grooves connected to each other are symmetrically provided on both sides of the inner wall of the square groove of the filter plate body. A rotating groove is provided at the position corresponding to the square groove on the top of the column cap, and a rotating rod is provided inside the rotating groove. The bottom end of the rotating rod passes through the rotating groove, the column cap and the square groove in sequence and extends to the inside of the square groove where a circular block is fixedly connected, and a connecting card is symmetrically installed on the outside of the circular block.

[0008] Furthermore, a support sleeve is fixedly connected to the position of the column cap on the surface of the column tube, four threaded sleeves are installed around the outside of the support sleeve at equal distances, a locking screw is connected to the inner thread of the threaded sleeve, and one end of the locking screw passes through the support sleeve and extends to the inside of the column cap to be plugged into it.

[0009] Furthermore, the outer side of the filter plate body is in contact with the inner wall of the column tube, and the bottom of the annular pressing sleeve is in contact with the top of the filter plate body.

[0010] Furthermore, an anti-slip ring is fixedly connected to the surface of the rotating rod and located inside the column cap, and the anti-slip ring is specifically a rubber ring.

[0011] Furthermore, the column cap is provided with a liquid inlet and outlet channel interconnected with the column tube, and the outer surface of the connecting end of the column cap is provided with a connecting thread.

[0012] Furthermore, a plurality of filter holes are provided on the filter plate body corresponding to the inner side of the annular pressing sleeve.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model discloses that when the column cap needs to be removed, the locking screw can be rotated under the threaded connection of the nut to disengage it from the plugging therewith, and the column cap can be rotated and then removed from the column tube. When the column cap is removed, the filter plate body will be taken out together, which is more convenient. When the filter plate body needs to be replaced, it is only necessary to rotate the rotating rod to drive the circular block and the connecting clamping plate to rotate together, so that the connecting clamping plate is disengaged from the plugging therewith of the supporting groove, and then it can be taken out from the square groove. Similarly, when installing, it is only necessary to reverse the above steps. The detachable liquid chromatography column has a reasonable structural design and is easy to use. It can realize rapid disassembly and assembly of various components. No tools are required during operation, which improves the convenience of users when working. In addition, the overall structural strength is good, the sealing performance of the installation is high, it is not easy to be squeezed and deformed, the internal filler is not easy to leak, it has a long service life, and can fully meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2It is a partial structural cross-sectional view of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the filter plate body, rotating rod, circular block and connecting clamping plate of the utility model.

[0018] In the figure: 1 column tube, 2 column cap, 3 boss, 4 filter plate body, 5 annular pressing sleeve, 6 square groove, 7 support groove, 8 rotation groove, 9 rotating rod, 10 round block, 11 connecting card plate, 12 support sleeve, 13 screw sleeve, 14 locking screw, 15 anti-slip ring, 16 inlet and outlet liquid channel, 17 filter hole. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-3 A detachable liquid chromatography column comprises a column tube 1 and a column cap 2, wherein the number of the column caps 2 is two and they are respectively threadedly connected to the two ends of the column tube 1, the column cap 2 is provided with an inlet and outlet liquid channel 16 which is interconnected with the column tube 1, the outer surface of the connecting end of the column cap 2 is provided with a connecting thread, an integrally formed boss 3 is installed on the inner wall of the column tube 1, a filter plate body 4 is provided on the top of the boss 3, a filler is provided inside the column tube 1, an annular pressing sleeve 5 is fixedly connected to the inner wall of the column cap 2, and a plurality of filter holes 17 are provided on the inner side of the filter plate body 4 corresponding to the annular pressing sleeve 5.

[0021] A square groove 6 is symmetrically provided on the top of the filter plate body 4, and support grooves 7 connected to each other are symmetrically provided on both sides of the inner wall of the square groove 6 of the filter plate body 4. A rotating groove 8 is provided at the position corresponding to the square groove 6 on the top of the column cap 2, and a rotating rod 9 is provided inside the rotating groove 8. The bottom end of the rotating rod 9 passes through the rotating groove 8, the column cap 2 and the square groove 6 in sequence and extends to the inside of the square groove 6 and is fixedly connected with a circular block 10. A connecting clamp 11 is symmetrically installed on the outer side of the circular block 10. The height of the connecting clamp 11 is adapted to the height of the upper and lower sides of the inner wall of the support groove 7, so that clamping can be achieved.

[0022] Specifically, a support sleeve 12 is fixedly connected to the position of the column cap 2 on the surface of the column tube 1, and four threaded sleeves 13 are installed around the outside of the support sleeve 12 at equal distances. A locking screw 14 is connected to the inner thread of the threaded sleeve 13. One end of the locking screw 14 passes through the support sleeve 12 and extends to the inside of the column cap 2 to be plugged in. When the column tube 1 and the column cap 2 form a threaded connection, the support sleeve 12 can be used to support the column cap 2, improve the axial compressive strength, and is not easy to deform. At the same time, it also has a certain sealing performance. After the locking screw 14 is rotated, its end can be plugged into the inside of the column cap 2 through the threaded connection with the threaded sleeve 13 to form a horizontal plug-in fixation, thereby improving the installation strength and preventing it from loosening due to the action of the thread.

[0023] Specifically, the outer side of the filter plate body 4 is in contact with the inner wall of the column tube 1, which can effectively prevent the internal filler from leaking from the joint. The bottom of the annular pressing sleeve 5 is in contact with the top of the filter plate body 4. The annular pressing sleeve 5 can not only cooperate with the boss 3 to achieve the compression and fixation of the filter plate body 4, but also can block the liquid after it enters, ensuring penetration from the filter hole 17.

[0024] Specifically, an anti-slip ring 15 is fixedly connected to the surface of the rotating rod 9 and located inside the column cap 2. The anti-slip ring 15 is specifically a rubber ring. The anti-slip ring 15 is made of a high-friction rubber material, which can prevent the rotating rod 9 from rotating freely, causing the connecting card 11 to be disengaged from the support groove 7, thereby preventing the filter plate body 4 from loosening and falling off.

[0025] The detachable liquid chromatography column has a reasonable structural design and is easy to use. It can realize rapid disassembly and assembly of various components without the need for tools during operation, thereby improving the convenience of users at work. It also has good overall structural strength, high installation sealing, is not easily deformed by extrusion, and internal fillers are not prone to leakage. It has a long service life and can fully meet usage requirements.

[0026] Working principle: when the column cap 2 needs to be removed, the locking screw 14 can be rotated under the threaded connection of the screw sleeve 13 to disengage it from the plug, and the column cap 2 can be rotated and then removed from the column tube 1. When the column cap 2 is removed, the filter plate body 4 will be taken out together, which is more convenient. When the filter plate body 4 needs to be replaced, it is only necessary to rotate the rotating rod 9 to drive the circular block 10 and the connecting card plate 11 to rotate together, so that the connecting card plate 11 is disengaged from the plug-in connection with the support groove 7, and then it can be taken out from the square groove 6. Similarly, when installing, it is only necessary to reverse the above steps.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable liquid chromatography column, comprising a column tube (1) and a column cap (2), characterized in that: There are two column caps (2) which are respectively threadedly connected to the two ends of the column tube (1); an integrally formed boss (3) is installed on the inner wall of the column tube (1); a filter plate body (4) is provided on the top of the boss (3); and an annular pressing sleeve (5) is fixedly connected to the inner wall of the column cap (2); The top of the filter plate body (4) is symmetrically provided with a square groove (6), and the filter plate body (4) is symmetrically provided with supporting grooves (7) that are in communication with each other on both sides of the inner wall corresponding to the square groove (6). The top of the column cap (2) is provided with a rotating groove (8) at a position corresponding to the square groove (6), and a rotating rod (9) is provided inside the rotating groove (8). The bottom end of the rotating rod (9) passes through the rotating groove (8), the column cap (2) and the square groove (6) in sequence and extends to the inside of the square groove (6) and is fixedly connected with a circular block (10), and a connecting card plate (11) is symmetrically installed on the outer side of the circular block (10).

2. A detachable liquid chromatography column according to claim 1, characterized in that: A support sleeve (12) is fixedly connected to the position of the column cap (2) on the surface of the column tube (1), and four screw sleeves (13) are installed around the outer side of the support sleeve (12) at equal distances. The screw sleeve (13) is internally threadedly connected to a locking screw (14), and one end of the locking screw (14) passes through the support sleeve (12) and extends to the inside of the column cap (2) to be plugged therein.

3. A detachable liquid chromatography column according to claim 2, characterized in that: The outer side of the filter plate body (4) is in contact with the inner wall of the column tube (1), and the bottom of the annular pressing sleeve (5) is in contact with the top of the filter plate body (4).

4. A detachable liquid chromatography column according to claim 3, characterized in that: An anti-slip ring (15) is fixedly connected on the surface of the rotating rod (9) and located inside the column cap (2), and the anti-slip ring (15) is specifically a rubber ring.

5. A detachable liquid chromatography column according to claim 4, characterized in that: The column cap (2) is provided with a liquid inlet and outlet channel (16) which is in communication with the column tube (1), and the outer surface of the connecting end of the column cap (2) is provided with a connecting thread.

6. A detachable liquid chromatography column according to claim 5, characterized in that: A plurality of filter holes (17) are provided on the filter plate body (4) on the inner side corresponding to the annular pressing sleeve (5).

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