A fixed assembly of chromatographic columns for a multidimensional gas chromatograph

Abstract

The utility model discloses a kind of column fixing assembly for multidimensional gas chromatograph, including sliding seat, the back seat surface of the sliding seat is equipped with sliding groove, further including pipe clamping mechanism, the pipe clamping mechanism includes U-shaped clamp seat, arc mouth block, slope strip, stop plate, screw pipe, connecting column and connector head, the surface of the one side seat body of the sliding seat away from sliding groove is integrally formed with U-shaped clamp seat, the pipe clamping mechanism is set by the improvement of the pipe clamping mechanism of multidimensional gas chromatograph internal fixed chromatographic column clamping seat and cooperation sliding seat, U-shaped clamp seat is used as the position of chromatographic column carding with pipe clamping mechanism, subsequently stop plate of U-shaped clamp seat is pushed with connector head by screw pipe and sends chromatographic column, so that chromatographic column is clamped and is firmly held between arc mouth block and connector, guarantee the long-term stable use after chromatographic column and multidimensional gas chromatograph communication, avoid the influence analysis result due to chromatographic column loosening.

Description

Technical Field

[0001] This utility model relates to the field of chromatographic column fixation technology, and in particular to a chromatographic column fixation component for a multidimensional gas chromatograph. Background Technology

[0002] Multidimensional gas chromatography (GC) is a separation and analysis technique developed from traditional gas chromatography. By connecting multiple chromatographic columns in series, parallel, or in combination, and combining different separation mechanisms (such as polarity, boiling point, molecular size differences, etc.), it achieves efficient separation of complex mixtures. When installing an ion chromatography column in a multidimensional gas chromatograph, the inlet of the multidimensional gas chromatograph is connected to the protective column with a liner and a sealing connector, and then connected to the inlet end of the chromatographic column. Then, the detector inlet of the multidimensional gas chromatograph is connected to the outlet of the chromatographic column with a sealing connector for installation.

[0003] Currently, in multidimensional gas chromatographs, the chromatographic column is connected to the inlet of the instrument and the inlet of the detector at both ends. The column is then clamped and fixed inside the multidimensional gas chromatograph using a sliding clamping column holder. However, this simple clamping column holder has limited clamping stability. The column holder ages quickly after repeated clamping, making it easy for the column to fall off after repeated clamping, affecting the normal use of the column. To address this, we propose a column fixing component for multidimensional gas chromatographs. Utility Model Content

[0004] The main objective of this invention is to provide a column fixing assembly for a multidimensional gas chromatograph. By improving the column clamping seat inside the multidimensional gas chromatograph and incorporating a sliding seat with a clamping mechanism, the clamping mechanism uses a U-shaped clamp as the position to accommodate the column. Subsequently, the stop plate of the U-shaped clamp uses a rotating tube to push the column head against the column, thus clamping the column securely between the arc-shaped block and the column connector. This ensures long-term stable use of the column after it is connected to the multidimensional gas chromatograph, preventing the analysis results from being affected by column loosening, and effectively solving the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A column fixing assembly for a multidimensional gas chromatograph includes a sliding base with a sliding groove on its back surface, and a tube clamping mechanism. The tube clamping mechanism includes a U-shaped clamp, an arc-shaped block, a bevel rib, a stop plate, a spiral tube, a connecting column, and a column head. The U-shaped clamp is integrally formed on the side of the sliding base away from the sliding groove, and the arc-shaped block is fitted inside the U-shaped clamp. The surface of the U-shaped clamp on one side of the arc-shaped block has a bevel rib, and the surface of the long base plate of the U-shaped clamp away from the arc-shaped block and the bevel rib has a stop plate. The surface of the stop plate has a through-hole for screwing in the spiral tube, and a connecting column is inserted into the tube opening. The column head away from the spiral tube has an integrally formed column head for cooperating with the arc-shaped block and the bevel rib to clamp the chromatographic column.

[0007] Furthermore, the length of the bottom plate of the U-shaped clamp is greater than the length of its top plate, and the end of the top plate of the U-shaped clamp and the top of the stop plate are provided with curved surfaces.

[0008] By adopting the above technical solution, the chromatographic column can be smoothly inserted into the holder between the top plate and the stop plate of the U-shaped clamp. The bottom plate and the top plate of the U-shaped clamp can also be opened in opposite directions to facilitate the insertion of a slightly larger chromatographic column.

[0009] Furthermore, the U-shaped inner wall of the U-shaped clamp is provided with three-sided hook grooves on three sides, and the three-sided hook ribs protruding from the outer side of the arc block are installed in the three-sided hook grooves. The length of the three-sided hook groove is less than the width of the seat plate of the U-shaped clamp.

[0010] By adopting the above technical solution, the arc-shaped block is positioned and clamped in the three-sided groove of the U-shaped clamp with three-sided hook ribs, which makes the arc-shaped block easy to remove and replace. The arc of the arc-shaped block can also be customized in size to easily adapt to the holders of chromatographic columns of different sizes.

[0011] Furthermore, the arc-shaped block has a semi-circular arc opening at its block body, and the surface of the connector head on one side of the arc-shaped block has an arc-shaped support surface.

[0012] By adopting the above technical solution, the arc-shaped opening can be used to clamp the column head and secure it to the chromatographic column.

[0013] Furthermore, a tail shank is welded to the bottom of the tail tube of the spiral tube, and the shank body is a T-shaped shank body.

[0014] By adopting the above technical solution, the rotating tube can be rotated at the screw-in hole by pinching the tail handle.

[0015] Furthermore, the reinforcing bar has an inclined guide surface that slopes upward toward the arc-shaped block at its body.

[0016] By adopting the above technical solution, the chromatographic column can be pushed along the slope ribs to the arc-shaped block for clamping.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention improves the column clamping seat inside a multidimensional gas chromatograph and incorporates a tube clamping mechanism with a sliding seat. The tube clamping mechanism uses a U-shaped clamp as the position to accommodate the column, and then a rotating tube pushes the column head against the stop plate of the U-shaped clamp to secure the column between the arc-shaped block and the column connector. This ensures the long-term stable use of the column after it is connected to the multidimensional gas chromatograph and avoids the impact on analytical results due to column loosening.

[0019] Furthermore, the arc-shaped block is secured with three-sided hook ribs and three-sided hook grooves on the U-shaped clamp, allowing for easy replacement of arc-shaped blocks of different sizes at the U-shaped clamp, making it suitable for clamping various chromatographic columns. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a column fixing assembly for a multidimensional gas chromatograph according to the present invention.

[0021] Figure 2 This is a schematic diagram showing the disassembled chromatographic column and clamping mechanism of a chromatographic column fixing assembly for a multidimensional gas chromatograph according to this utility model.

[0022] Figure 3 This is an exploded view of the clamping mechanism of a column fixing component for a multidimensional gas chromatograph according to the present invention.

[0023] In the diagram: 1. Sliding seat; 2. Sliding groove; 3. Tube clamping mechanism; 4. U-shaped clamp; 5. Three-sided hook groove; 6. Three-sided hook rib; 7. Arc block; 8. Sloping rib; 9. Stop plate; 10. Screw-in hole; 11. Screw tube; 12. Tail handle; 13. Column connector; 14. Column head connector; 15. Chromatographic column. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figure 1-3As shown, a column fixing assembly for a multidimensional gas chromatograph includes a sliding base 1 with a sliding groove 2 on its back surface. It also includes a clamping mechanism 3, which comprises a U-shaped clamp 4, an arc-shaped block 7, a bevel rib 8, a stop plate 9, a spiral tube 11, a connecting column 13, and a column head 14. The U-shaped clamp 4 is integrally formed on the side of the sliding base 1 away from the sliding groove 2, and the arc-shaped block 7 is clamped to the inside of the U-shaped clamp 4. The surface of the U-shaped clamp 4 on one side of the arc block 7 has a raised bevel rib 8, and the surface of the long seat plate of the U-shaped clamp 4 away from the arc block 7 and the bevel rib 8 has a raised stop plate 9. The surface of the stop plate 9 has a through hole 10 for screwing in the spiral tube 11, and a connecting post 13 is inserted into the tube opening of the spiral tube 11. The column head of the connecting post 13 away from the spiral tube 11 is integrally formed with a column head 14 for cooperating with the arc block 7 and the bevel rib 8 to clamp the chromatographic column 15.

[0026] The bottom plate of the U-shaped clamp 4 is longer than the top plate of the clamp itself, and the end of the top plate of the U-shaped clamp 4 and the top of the stop plate 9 are provided with an arc surface.

[0027] By adopting the above technical solution, the chromatographic column 15 can be smoothly inserted into the seat between the top plate and the stop plate 9 of the U-shaped clamp 4. The bottom plate and the top plate of the U-shaped clamp 4 can also be opened in opposite directions to facilitate the insertion of a slightly larger chromatographic column 15.

[0028] Among them, the U-shaped clamp 4 has a three-sided hook groove 5 on three sides of the U-shaped inner seat wall, and the three-sided hook groove 5 is fitted with a three-sided hook rib 6 protruding from the outer side of the arc block 7. The length of the three-sided hook groove 5 is less than the width of the seat plate of the U-shaped clamp 4.

[0029] By adopting the above technical solution, the arc-shaped block 7 is positioned and clamped in the three-sided hook groove 5 of the U-shaped clamp 4 with the three-sided hook rib 6, so that the arc-shaped block 7 can be easily removed and replaced. The arc-shaped opening of the arc-shaped block 7 can also be customized in size to facilitate the adaptation to the holder of the chromatographic column 15 of different sizes.

[0030] The arc-shaped block 7 has a semi-circular arc opening at its block body, and the surface of the connector head 14 on one side of the arc-shaped block 7 has an arc-shaped support surface.

[0031] By adopting the above technical solution, the arc-shaped block 7 can be used with the column head 14 to clamp the chromatographic column with a semi-circular arc.

[0032] The tail tube 11 is welded to the bottom of the tail tube with a tail handle 12, and the handle of the tail handle 12 is a T-shaped handle.

[0033] By adopting the above technical solution, the rotating tube 11 can be rotated at the screw-in hole 10 by pinching the tail handle 12.

[0034] Among them, the slope bar 8 is provided with a sloping guide surface that tilts upward toward the arc block 7 at the bar body;

[0035] By adopting the above technical solution, the chromatographic column 15 can be pushed along the slope rib 8 to the arc-shaped block 7 for clamping.

[0036] It should be noted that this utility model is a column fixing assembly for a multidimensional gas chromatograph. By improving the column clamping seat for fixing the column 15 inside the multidimensional gas chromatograph, the sliding seat 1 in this utility model is a product of the hardening of the original column clamping seat body. This ensures that the sliding seat 1 can be normally slidably installed in the clamping position of the column clamping seat inside the multidimensional gas chromatograph with the help of the sliding groove 2. Alternatively, the sliding seat 1 can also be drilled and bolted to be locked inside the multidimensional gas chromatograph. Subsequently, the tube clamping mechanism 3 on the surface of the sliding seat 1 replaces the original simple elastic clamping arm structure. The U-shaped clamping seat 4 of the clamping mechanism 3 can form a clamping position on the surface of the sliding seat 1. The column 15 can be smoothly inserted into the seat from between the top plate and the stop plate 9 of the U-shaped clamping seat 4. Then the column 15 is pressed against the surface of the column head 14. At this time, it is pinched... The tail shank 12 rotates the rotary tube 11, causing the rotary tube 11 to rotate at the connecting column 13. At the same time, it pushes the column head 14 to move the chromatographic column 15 towards the arc-shaped block 7. The chromatographic column 15 is inserted into the arc-shaped opening of the arc-shaped block 7 along the slope rib 8. As the rotary tube 11 continues to push, the chromatographic column 15 is firmly clamped, ensuring stable use after the two ends of the chromatographic column 15 are connected to the multidimensional gas chromatograph. When the rotary tube 11 is unscrewed, the chromatographic column 15 and the column head 14 can be pulled back, allowing the chromatographic column 15 to be removed from between the top seat plate and the stop plate 9 of the U-shaped clamp 4 for replacement. The arc-shaped block 7 is positioned and clamped in the three-sided hook groove 5 of the U-shaped clamp 4 with three-sided hook ribs 6, making the arc-shaped block 7 easy to remove and replace. The arc-shaped opening of the arc-shaped block 7 can also be customized to fit the clamps of different sizes of chromatographic column 15.

[0037] It should be noted that this utility model is a column fixation component for a multidimensional gas chromatograph. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A column fixing assembly for a multidimensional gas chromatograph, comprising a sliding mount (1), wherein the back surface of the sliding mount (1) is provided with a sliding groove (2), characterized in that: It also includes a pipe clamping mechanism (3), which includes a U-shaped clamp (4), an arc-shaped block (7), a slope rib (8), a stop plate (9), a spiral pipe (11), a connecting column (13), and a connecting column head (14). The sliding seat (1) has a U-shaped clamp (4) integrally formed on the side of the seat body away from the sliding groove (2), and the arc-shaped block (7) is clamped inside the U-shaped clamp (4). The surface of the U-shaped clamp (4) on one side of the arc-shaped block (7) has a protruding slope rib (8). 8), and the long seat plate surface of the U-shaped clamp (4) away from the arc block (7) and the slope rib (8) has a stop plate (9) protruding. The plate surface of the stop plate (9) has a through hole (10) for screwing in the spiral tube (11). A connecting column (13) is inserted at the tube opening of the spiral tube (11). The column head of the connecting column (13) away from the spiral tube (11) is integrally formed with a column head (14) for cooperating with the arc block (7) and the slope rib (8) to clamp the chromatographic column (15).

2. The column immobilization assembly for a multidimensional gas chromatograph according to claim 1, characterized in that: The length of the bottom seat plate of the U-shaped clamp (4) is greater than the length of its top seat plate, and the end of the top seat plate of the U-shaped clamp (4) and the top of the stop plate (9) are provided with an arc surface.

3. The column immobilization assembly for a multidimensional gas chromatograph according to claim 1, characterized in that: The U-shaped clamp (4) has three-sided hook grooves (5) on three sides of the inner wall of the U-shaped clamp (4), and the three-sided hook ribs (6) protruding from the outer side of the arc block (7) are installed in the three-sided hook grooves (5). The length of the groove of the three-sided hook groove (5) is less than the width of the seat plate of the U-shaped clamp (4).

4. The column immobilization assembly for a multidimensional gas chromatograph according to claim 1, characterized in that: The arc-shaped block (7) has a semi-circular arc opening at its block body, and the surface of the connector head (14) on one side of the arc-shaped block (7) has an arc-shaped support surface.

5. The column immobilization assembly for a multidimensional gas chromatograph according to claim 1, characterized in that: The tail tube (11) has a tail handle (12) welded to the bottom of the tail tube, and the handle (12) is a T-shaped handle.

6. The column immobilization assembly for a multidimensional gas chromatograph according to claim 1, characterized in that: The slope bar (8) has a sloping guide surface that is inclined upward toward the arc block (7) at the bar body.

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