Guard column structure of chromatographic column of chromatographic analysis instrument

Abstract

The utility model relates to the technical field of chromatographic analyzers, in particular to a protective column structure of a chromatographic column of a chromatographic analyzer, which comprises an upper shell, a lower shell movably arranged on the end face of the upper shell, a spool movably arranged in the upper shell and a rotating shaft movably arranged in the lower shell, a telescopic groove is formed in the upper shell, a telescopic tube is arranged in the telescopic groove, a connecting ring is arranged on the outer surface of the telescopic tube in a sleeving manner and is movably arranged in the telescopic groove, and a capturing assembly is arranged in the upper shell and is used for capturing particles and impurities entering a sample from the interior of the telescopic tube. The wire pipe can enter the upper shell and the lower shell through the telescopic pipe, and the arranged connecting ring can stretch out and draw back in the connecting groove, so that the use limitation can be reduced, the connecting part of the wire pipe and the connecting pipe can be clamped, and impurities are prevented from entering through the connecting part to influence the chromatographic result of a sample.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic analyzers, and specifically to a protective column structure of a chromatographic column of a chromatographic analyzer. Background Art

[0002] The chromatographic guard column is an important component of the high performance liquid chromatograph. It is installed between the injector and the analytical column. The main function of the guard column is to protect the analytical column from interference from impurities in the sample and mobile phase, thereby extending the service life of the analytical column and improving the chromatographic separation effect.

[0003] However, in actual use, the existing protective column structure of the chromatographic column of the chromatographic analysis instrument has a design structure in which the threaded seat at one end of the column and the injector or analytical column are fixed by a snap fit, and the mounting strip is fixed by a threaded connection between a bolt and a mounting screw hole. Therefore, when a large injector and analytical column need to be rotated, the threaded connection method will lead to limitations in use. Therefore, we propose a protective column structure for the chromatographic column of the chromatographic analysis instrument. Utility Model Content

[0004] A technical problem to be solved by the present application is: how to design a protective column structure for a chromatographic column of a chromatographic analysis instrument that reduces the limitations of use caused by a rotating connecting tube.

[0005] To solve the above technical problems, the present invention provides a protective column structure for a chromatographic column of a chromatographic analysis instrument, comprising an upper shell, a lower shell movably arranged on the end surface of the upper shell, a wire tube movably arranged inside the upper shell, and a rotating shaft movably arranged inside the lower shell, and further comprising:

[0006] a telescopic tube, the telescopic tube being movably disposed inside the upper shell;

[0007] a telescopic slot, the telescopic slot being opened inside the upper shell;

[0008] A connecting ring, which is sleeved on the outer surface of the telescopic tube and movably arranged inside the telescopic slot;

[0009] The capturing component is arranged on and inside the upper shell and is used to capture particles and impurities that enter the sample from the inside of the telescopic tube.

[0010] In some embodiments, the capture assembly includes a column core bracket arranged inside the lower shell, filter plates are arranged inside both ends of the column core bracket, a connecting tube is sleeved on the outer surface of the top end of the column core bracket, and a T-block is arranged on the top end of the connecting tube.

[0011] In some embodiments, a bevel is provided between the T-block and the connecting tube, and the T-block and the connecting tube are respectively made of PEKK material and stainless steel, which fits tightly together.

[0012] In some embodiments, the outer surface of the telescopic tube is provided with threads for direct connection to an object of use.

[0013] In some embodiments, a slot is provided inside the lower shell, and a limiting ring is sleeved on the outer surface of the rotating shaft, and the limiting ring is movably disposed inside the slot.

[0014] In some embodiments, outer surfaces of the upper shell and the lower shell are both knurled.

[0015] In some embodiments, a blade ring is provided at the top end of the telescopic tube, and the wire tube is provided inside the blade ring for clamping the wire tube and sealing it, and the blade ring is made of PEEK material.

[0016] This utility model has at least the following beneficial effects:

[0017] 1. The sample is placed through the provided wire tube, and the interior of the upper and lower shells can be entered through the telescopic tube. The capture component is used to capture the particles and impurities of the sample. The provided telescopic tube can drive the connecting ring to move, and the provided connecting ring can be extended and retracted inside the connecting groove, thereby reducing the limitations of use;

[0018] 2. At the same time, the blade ring provided on the end face of the connecting tube can clamp the connection between the wire tube and the connecting tube to prevent impurities from entering through the connection and affecting the chromatographic results of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility;

[0020] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the overall front of the utility model;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A;

[0023] Figure 5 This is a schematic diagram of the structure of the upper shell, lower shell and blade ring of this utility model.

[0024] In the figure: 1. Upper shell; 2. Telescopic tube; 3. Wire tube; 4. Knurling; 5. Lower shell; 6. Rotating shaft; 7. Thread; 8. Telescopic slot; 9. Connecting ring; 10. Capture assembly; 101. Column core bracket; 102. Filter; 103. Connecting tube; 104. T-block; 11. Slot; 12. Limiting ring; 13. Blade ring. DETAILED DESCRIPTION

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

[0026] Example 1

[0027] See also Figure 1-4 , this utility provides a technical solution:

[0028] A protective column structure for a chromatographic column of a chromatographic analysis instrument comprises an upper shell 1, a lower shell 5 movably arranged on the end surface of the upper shell 1, a wire tube 3 movably arranged inside the upper shell 1, and a rotating shaft 6 movably arranged inside the lower shell 5. The interior of the rotating shaft 6 is hollow, the top of the upper shell 1 is rounded, and the bottom of the lower shell 5 is rounded, which can provide a high aesthetic appearance. The structure also includes:

[0029] The telescopic tube 2 is movably arranged inside the upper shell 1;

[0030] The telescopic slot 8 is provided inside the upper shell 1;

[0031] A connecting ring 9 is sleeved on the outer surface of the telescopic tube 2 and movably arranged inside the telescopic slot 8;

[0032] The capturing component 10 is arranged inside the upper shell 1 and is used to capture particles and impurities that enter the sample from the inside of the telescopic tube 2.

[0033] The capture component 10 includes a column core bracket 101 arranged inside the lower shell 5, and filter plates 102 are arranged inside both ends of the column core bracket 101. The top outer surface of the column core bracket 101 is provided with a connecting tube 103, and the top of the connecting tube 103 is provided with a T-block 104. The filter plate 102 can remove impurities on the captured sample. The filter plate 102 is cylindrical in shape, which can be easily replaced and prevented from being brought into the interior of the upper shell 1.

[0034] There is an inclined surface between the T-block 104 and the connecting tube 103 , and the T-block 104 and the connecting tube 103 are respectively made of PEKK material and stainless steel and fit tightly together. The inclined surface between the two facilitates mutual rotation.

[0035] The outer surface of the telescopic tube 2 is provided with a thread 7 for directly connecting to an object of use. The thread 7 provided on the outer surface can be turned to connect to the object of use, thereby reducing the number of parts used for the connection.

[0036] A slot 11 is provided inside the lower shell 5, and a limiting ring 12 is provided on the outer surface of the rotating shaft 6. The limiting ring 12 is movably arranged inside the slot 11. The slot 11 and the limiting ring 12 are arranged so that the rotating shaft 6 can rotate smoothly after being pressed in in a snap-fit ​​form. The rotation is to prevent the wire tube 3 from being twisted off due to the rotation of the threaded connection 7.

[0037] The outer surfaces of the upper shell 1 and the lower shell 5 are both provided with knurling 4, and the knurling 4 is provided to play an anti-slip role.

[0038] When using this device, you first need to let the sample to be captured enter through the wire tube 3, and then you can rotate the thread 7 on the outer surface of the connecting tube to connect. After the connection is completed, the sample can enter the T-block 104, and the impurities enter the filter plate 102 and the column core bracket 101 through the T-block 104 to be separated and detected. Finally, the data processing, flushing and regeneration are completed. When it is necessary to adjust the expansion and contraction of the connecting tube, it can be adjusted through the connecting ring 9 on the outer surface of one end of the connecting tube on the inner wall of the expansion groove 8.

[0039] Example 2

[0040] See also Figure 5 , this utility provides a technical solution:

[0041] Different from Example 1, a blade ring 13 is provided at the top of the telescopic tube 2, and the wire tube 3 is arranged inside the blade ring 13 for clamping the wire tube 3 and sealing it, and the blade ring 13 is made of PEEK material.

[0042] When the line tube 3 enters the inner wall of the connecting tube, a certain gap will appear at the connection between the two, causing impurities to enter the inner wall of the connection and affect the detection results. For this purpose, the blade ring 13 is provided to block the gap between the two and prevent impurities from entering.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective column structure for a chromatographic column of a chromatographic analysis instrument, comprising an upper shell (1), a lower shell (5) movably arranged on the end surface of the upper shell (1), a wire tube (3) movably arranged inside the upper shell (1), and a rotating shaft (6) movably arranged inside the lower shell (5), characterized in that: Also included are: a telescopic tube (2), the telescopic tube (2) being movably arranged inside the upper shell (1); a telescopic slot (8), wherein the telescopic slot (8) is provided inside the upper shell (1); A connecting ring (9), the connecting ring (9) is sleeved on the outer surface of the telescopic tube (2) and movably arranged inside the telescopic groove (8); A capture component (10) is provided on and inside the upper shell (1) and is used to capture particles and impurities that enter the sample from the inside of the telescopic tube (2).

2. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 1, characterized in that: The capture assembly (10) comprises a column core bracket (101) arranged inside the lower shell (5), filter plates (102) are arranged inside both ends of the column core bracket (101), a connecting tube (103) is sleeved on the outer surface of the top end of the column core bracket (101), and a T-shaped block (104) is arranged at the top end of the connecting tube (103).

3. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 2, characterized in that: An inclined surface is provided between the T-shaped block (104) and the connecting tube (103), and the T-shaped block (104) and the connecting tube (103) are respectively made of PEKK material and stainless steel and are tightly fitted.

4. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 3, characterized in that: The outer surface of the telescopic tube (2) is provided with a thread (7) for direct connection to an object of use.

5. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 4, characterized in that: A slot (11) is provided inside the lower shell (5), and a limiting ring (12) is sleeved on the outer surface of the rotating shaft (6). The limiting ring (12) is movably arranged inside the slot (11).

6. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 5, characterized in that: The outer surfaces of the upper shell (1) and the lower shell (5) are both provided with knurling (4).

7. The protective column structure of the chromatographic column of the chromatographic analysis instrument according to claim 6, characterized in that: A blade ring (13) is provided at the top end of the telescopic tube (2), and the wire tube (3) is arranged inside the blade ring (13) for clamping the wire tube (3) and sealing it, and the blade ring (13) is made of PEEK material.

Images