A readily detachable gas chromatography column oven for ease of maintenance

Abstract

The utility model relates to a kind of easy disassembly gas chromatographic column box convenient to maintain, including box, sample inlet and detection interface, sample inlet and detection interface are respectively fixedly connected on the top side wall in box, the bottom of the sample inlet and the detection interface is respectively provided with two slide holes, positioning rod is slidably connected in slide hole, the bottom end of two positioning rods is fixedly connected with positioning ring in common.The utility model relates to the technical field of chromatographic column box.This kind of easy disassembly gas chromatographic column box, places chromatographic column joint in the inner ring of positioning ring, then cooperates the positioning of flexible pipe and reaches the effect of centering, then using positioning ring moves upwards and drives corresponding chromatographic column joint to insert into sample inlet, then cooperates the resistance of resistance block, so that chromatographic column joint can be stably inserted in sample inlet and detection interface, so as to save the step of bolt tightening and wrench auxiliary, reaches the effect that gas chromatographic column is maintained conveniently.

Description

Technical Field

[0001] This utility model relates to the technical field of chromatography column ovens, and in particular to an easy-to-maintain and easily disassembled gas chromatography column oven. Background Technology

[0002] A gas chromatography column is a long, thin tube coated with a thin layer of liquid (called the stationary phase). When a sample mixture is carried through the column by a carrier gas (called the mobile phase), the components undergo repeated partitioning between the stationary and mobile phases. Because different components have different interactions with the stationary phase (such as adsorption and dissolution), they pass through the column at different rates, escaping at different times (retention times) to achieve separation. When replacing or installing a gas chromatography column, bolts are used to fix the column to the injection port and the detection port. However, a wrench is also needed to assist in fixing the bolts. This increases the number of steps involved in fixing or replacing the column, thus affecting the efficiency of replacement and disassembly, and consequently impacting the maintenance efficiency of the column. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an easy-to-maintain and easily disassembled gas chromatography column oven, so as to solve the technical problems mentioned in the background art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An easy-to-maintain and easily disassembled gas chromatography column oven includes a box body, an injection port, and a detection port. The injection port and the detection port are respectively fixedly connected to the top side wall of the box body. Two sliding holes are opened at the bottom of the injection port and the detection port, and positioning rods are slidably connected in the sliding holes. The bottom ends of the two positioning rods are fixedly connected to a positioning ring. A chromatographic column connector is provided on the positioning ring, and a positioning component is also provided at the bottom of the chromatographic column connector.

[0005] In a preferred embodiment, the present invention can be further configured such that the positioning component includes a positioning post, the bottom diameter of which is the same as the inner diameter of the positioning ring, and the bottom end of the positioning post is inserted into the positioning ring.

[0006] In a preferred embodiment, the present invention can be further configured such that: the side of the positioning ring is provided with a clearance groove for avoiding the positioning post, and flexible blocks are fixedly connected to the two opposite side walls of the clearance groove, and the ends of the two flexible blocks are both arc-shaped.

[0007] In a preferred embodiment, the present invention can be further configured such that: a rotating ring is rotatably connected to the outer periphery of both the sample inlet and the detection interface, and two abutment rods are fixedly connected to the bottom of the rotating ring, the abutment rods being arc-shaped.

[0008] In a preferred embodiment, the present invention can be further configured such that: an abutment block is fixedly connected to the bottom end of the abutment rod near the column connector, and a notch corresponding to the abutment block is provided on the outer periphery of the positioning ring.

[0009] In a preferred embodiment, the present invention can be further configured such that the top end of the contact block is inclined, and a sealing ring is fixedly connected to the top of the chromatographic column connector.

[0010] In summary, this utility model has at least one of the following beneficial technical effects: 1. This easy-to-maintain, easily disassembled gas chromatography column oven places the column connector inside the inner ring of the positioning ring, and with the help of the flexible tube positioning, it achieves a centered effect. Then, the positioning ring moves upward to drive the corresponding column connector into the injection port. With the help of the contact block, the column connector can be stably inserted into the injection port and the detection port, thus eliminating the need for bolt tightening and wrench assistance, achieving the effect of easy gas chromatography column maintenance. 2. This easy-to-maintain and easily disassembled gas chromatography column oven, after the column connector is initially positioned, push the positioning ring upward to allow the positioning rod to insert into the sliding hole. After the column connector is inserted into the injection port, the positioning ring will be located between the two abutting rods. The abutting rods and the positioning ring contact and abut each other, forming friction to prevent the positioning ring from falling down, thus achieving the effect of positioning the positioning ring. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the chromatography column oven of this utility model.

[0014] Figure 3 This is a schematic diagram of the sample inlet interface of this utility model.

[0015] Figure 4 This is a schematic diagram of the bottom structure of the sample inlet interface of this utility model.

[0016] In the diagram, 1. Box body; 2. Sample injection interface; 3. Detection interface; 4. Sliding hole; 5. Positioning rod; 6. Positioning ring; 7. Column connector; 8. Positioning assembly; 9. Positioning column; 10. Clearance groove; 11. Flexible block; 12. Rotary ring; 13. Abutment rod; 14. Abutment block; 15. Notch; 16. Sealing ring. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Example: Refer to Figure 1 - Figure 4 This utility model discloses an easy-to-maintain and easily disassembled gas chromatography column oven, including a box body 1, an injection port 2, and a detection port 3. The injection port 2 and the detection port 3 are respectively fixedly connected to the top side wall inside the box body 1. Two sliding holes 4 are respectively opened at the bottom of the injection port 2 and the detection port 3. A positioning rod 5 is slidably connected in the sliding hole 4. The bottom ends of the two positioning rods 5 are fixedly connected to a positioning ring 6. A chromatography column connector 7 is provided on the positioning ring 6. A positioning component 8 is also provided at the bottom of the chromatography column connector 7.

[0019] In this embodiment, reference Figure 2 - Figure 4 When the two ends of the chromatographic column need to be inserted into the injection port 2 and the detection port 3 respectively, pull down the positioning ring 6 to make the positioning rod 5 slide downward (the top diameter of the positioning rod 5 is larger than the diameter of the positioning rod 5 itself, making it T-shaped, which is not shown in the figure, so that it slides in the sliding hole 4 to avoid disengaging from the sliding hole 4, and the bottom of the sliding hole 4 is designed to be constricted to limit the top of the positioning rod 5), so that the chromatographic column connector 7 is disengaged from the injection port 2, and then the chromatographic column connector 7 is exposed. The chromatographic column connector 7 is removed from the position of the positioning ring 6, and then the corresponding end of the chromatographic column is inserted from the bottom of the chromatographic column connector 7, leaving a specified length, and then the chromatographic column connector 7 is put back into the positioning ring 6. Then the positioning ring 6 is pushed up, and the positioning component 8 is used to fix the chromatographic column connector 7 and the positioning ring 6. At this time, the docking and installation of the chromatographic column connector 7 and the chromatographic column are completed.

[0020] In a further preferred embodiment of this utility model, such as Figure 2 - Figure 4 As shown, the positioning component 8 includes a positioning post 9. The bottom diameter of the positioning post 9 is the same as the inner diameter of the positioning ring 6, and the bottom end of the positioning post 9 is inserted into the positioning ring 6. The side of the positioning ring 6 is provided with a clearance groove 10 for avoiding the positioning post 9. Flexible blocks 11 are fixedly connected to the two opposite side walls of the clearance groove 10. The ends of the two flexible blocks 11 are both arc-shaped. Both the sample inlet 2 and the detection interface 3 are rotatably connected to a rotating ring 12 on their outer periphery. Two abutment rods 13 are fixedly connected to the bottom of the rotating ring 12, and the abutment rods 13 are arranged in an arc shape.

[0021] In this embodiment, combined with Figure 2 - Figure 4 The bottom end of the positioning column 9 is fixedly connected to the bottom end of the column connector 7. The center of the positioning column 9 has a small hole to facilitate the passage of the column end. After the column end passes through the bottom end of the positioning column 9 and through the column connector 7, the column connector 7 is placed back into the positioning ring 6. Meanwhile, the positioning column 9 passes between two flexible blocks 11 in the relief groove 10. The flexible blocks 11 are made of soft material such as rubber or silicone. When the positioning column 9 passes between the two flexible blocks 11, it will squeeze the flexible blocks 11. After the outer periphery of the positioning column 9 fits the inner ring of the positioning ring 6, the flexible blocks 11 can be pulled by hand to restore them. This completes the centering and initial positioning of the column connector 7. After the column connector 7 is initially positioned, push the positioning ring 6 upward so that the positioning rod 5 is inserted into the sliding hole 4. After the column connector is inserted into the injection port 2, the positioning ring 6 will be located between the two abutting rods 13. The abutting rods 13 and the positioning ring 6 will contact and abut each other, forming friction to prevent the positioning ring 6 from falling down, thus achieving the effect of positioning the positioning ring 6.

[0022] In a further preferred embodiment of this utility model, such as Figure 2 - Figure 4 As shown, the bottom end of the abutment rod 13 is fixedly connected to the bottom end near the column connector 7. The outer periphery of the positioning ring 6 is provided with a notch 15 corresponding to the abutment block 14. The top end of the abutment block 14 is inclined. The top end of the column connector 7 is fixedly connected to a sealing ring 16.

[0023] In this embodiment, combined with Figure 2 - Figure 4 When the positioning ring 6 is positioned, the sliding of the positioning ring 6 will cause the abutment block 14 at the end of the abutment rod 13 to pass through the notch 15 opened on the outer periphery of the positioning ring 6. Then, the rotating ring 12 will rotate, and the rotating ring 12 will drive the abutment block 14 to rotate, so that the inclined side of the top of the abutment block 14 will contact the bottom edge of the notch 15 first, so that the positioning ring 6 is squeezed by the top of the abutment block 14. The outer surface of the positioning ring 6 is covered with a rubber layer, so that the positioning ring 6 can be firmly attached to the bottom surface of the injection port 2 by the squeezing of the abutment block 14, thereby completing the positioning and locking of the positioning ring 6 and the column connector 7.

[0024] The implementation principle of the above embodiment is as follows: When it is necessary to insert the two ends of the chromatographic column into the injection port 2 and the detection port 3 respectively, pull down the positioning ring 6, so that the positioning ring 6 drives the positioning rod 5 to slide downward, allowing the chromatographic column connector 7 to disengage from the injection port 2, and then expose the chromatographic column connector 7, allowing the chromatographic column connector 7 to be removed from the position of the positioning ring 6. Then, insert the corresponding end of the chromatographic column from the bottom of the chromatographic column connector 7, leaving a specified length, and then put the chromatographic column connector 7 back into the positioning ring 6. The bottom end of the positioning column 9 is fixedly connected to the bottom end of the chromatographic column connector 7, and the center of the positioning column 9 is provided with a small hole. To facilitate the passage of the column end, the end of the column is passed through the bottom of the positioning column 9 and through the column connector 7. The column connector 7 is then placed back into the positioning ring 6. During this process, the positioning column 9 passes between two flexible blocks 11 in the clearance groove 10. The flexible blocks 11 are made of soft material such as rubber or silicone. When the positioning column 9 passes between the two flexible blocks 11, it will squeeze the flexible blocks 11. After the outer periphery of the positioning column 9 fits against the inner ring of the positioning ring 6, the flexible blocks 11 can be pulled by hand to restore them. This completes the centering and initial positioning of the column connector 7. When the positioning ring 6 is positioned, the sliding of the positioning ring 6 will cause the abutment block 14 at the end of the abutment rod 13 to pass through the notch 15 opened on the outer periphery of the positioning ring 6. Then, the rotating ring 12 will rotate, and the rotating ring 12 will drive the abutment block 14 to rotate, so that the inclined side of the top of the abutment block 14 will contact the bottom edge of the notch 15 first. This will cause the positioning ring 6 to be squeezed by the top of the abutment block 14. The outer surface of the positioning ring 6 is covered with a rubber layer, so that the positioning ring 6 can be firmly attached to the bottom surface of the injection port 2 by the squeezing of the abutment block 14, thereby completing the positioning and locking of the positioning ring 6 and the column connector 7.

[0025] Additionally, it should be noted that the column connection and installation method at the detection interface 3 is the same as that at the injection interface 2, and the steps are also the same.

[0026] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A maintenance-friendly, easily disassembled gas chromatography column oven, comprising a box body (1), an injection port (2), and a detection port (3), wherein the injection port (2) and the detection port (3) are respectively fixedly connected to the top side wall inside the box body (1), characterized in that, The bottom of the injection interface (2) and the detection interface (3) are respectively provided with two sliding holes (4). A positioning rod (5) is slidably connected in the sliding hole (4). The bottom ends of the two positioning rods (5) are fixedly connected to a positioning ring (6). A chromatographic column connector (7) is provided on the positioning ring (6). A positioning component (8) is also provided at the bottom of the chromatographic column connector (7).

2. The easily maintainable and detachable gas chromatography column oven according to claim 1, characterized in that, The positioning component (8) includes a positioning post (9), the bottom diameter of which is the same as the inner diameter of the positioning ring (6), and the bottom end of the positioning post (9) is inserted into the positioning ring (6).

3. The easily maintainable and detachable gas chromatography column oven according to claim 2, characterized in that, The positioning ring (6) has a clearance groove (10) on its side for avoiding the positioning post (9). Two flexible blocks (11) are fixedly connected to the two opposite side walls of the clearance groove (10), and the ends of the two flexible blocks (11) are arc-shaped.

4. The easily maintainable and detachable gas chromatography column oven according to claim 1, characterized in that, The outer periphery of both the sample inlet (2) and the detection interface (3) is rotatably connected to a rotating ring (12). The bottom of the rotating ring (12) is fixedly connected to two abutting rods (13), which are arranged in an arc shape.

5. The easily maintainable and detachable gas chromatography column oven according to claim 4, characterized in that, The bottom end of the abutment rod (13) is fixedly connected to the side of the column connector (7), and the outer periphery of the positioning ring (6) is provided with a notch (15) corresponding to the abutment block (14).

6. The easily maintainable and detachable gas chromatography column oven according to claim 5, characterized in that, The top end of the contact block (14) is inclined, and the top end of the chromatographic column connector (7) is fixedly connected with a sealing ring (16).

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