Sample injection structure of liquid chromatograph

Abstract

The utility model discloses a sample introduction structure of liquid chromatograph, including liquid chromatograph main part, the liquid chromatograph main part upper end one side has reserved sample introduction. Advantageous effect lies in: the utility model discloses a group by rotary block, rotary column, servo motor, three groups of magnetic guide rail, magnetic block and three groups of different inside diameter's elastic snap ring, in the sample introduction process, can through servo motor drive rotary block rotation, and then will rotary column adjust from horizontal state to vertical state, then according to the specification rotation rotary column of syringe selects the elastic snap ring of suitable inside diameter, then fixes it, again syringe is through the elastic snap ring and is connected fixedly, at this moment, only need to push magnetic block and slowly move in the magnetic guide rail, can be inserted into the needle head sample introduction, this mode can through the magnetic guide rail to the limiting orientation of syringe, not only is convenient for staff sample introduction, and sample introduction effect is good, has higher use performance and applicability.

Description

Technical Field

[0001] This utility model relates to the field of liquid chromatograph injection structure technology, specifically to an injection structure for a liquid chromatograph. Background Technology Liquid chromatography is a type of separation and analysis technique characterized by using a liquid as the mobile phase and various forms of stationary phase, such as paper, thin-layer plates, and packed beds. In the development of chromatographic technology, in order to distinguish various methods, they have been named according to the form of the stationary phase, such as paper chromatography, thin-layer chromatography, column liquid chromatography, and liquid chromatograph.

[0002] In existing liquid chromatographs, the sample injection process involves the operator holding a syringe, inserting the needle into the pre-designated injection port, and pushing the syringe to inject the sample. However, this method lacks proper syringe guidance and positioning, leading to needle bending due to shaking when the syringe is inserted into the injection port, causing damage or contamination, and inconveniencing the operator. Therefore, there is an urgent need for a new liquid chromatograph injection structure to address these issues. Utility Model Content

[0003] (a) Technical problems to be solved The technical problem to be solved by this utility model is to provide an injection structure for a liquid chromatograph, based on the current state of the technology.

[0004] (II) Technical Solution This utility model is achieved through the following technical solution: This utility model proposes an injection structure for a liquid chromatograph, including a liquid chromatograph body, an injection port reserved on one side of the upper end of the liquid chromatograph body, a U-shaped support provided on one side of the injection port, a rotating block installed inside the support, a servo motor installed on one side wall of the support, a rotating column installed inside the rotating block, three sets of positioning holes circumferentially distributed on the outer side wall of the bottom end of the rotating column, a positioning bolt installed on one side wall of the rotating block, three sets of magnetic guide rails circumferentially distributed on the outer side wall of the rotating column, a T-shaped groove opened in the magnetic guide rail, a magnetic block installed in the T-shaped groove, an elastic retaining ring fixed on one side wall of the magnetic block, and a rubber pad provided on the inner wall of the elastic retaining ring.

[0005] Furthermore, the injection port is connected to the main body of the liquid chromatograph by screws, and the support is fixed to the top of the main body of the liquid chromatograph by bolts.

[0006] Furthermore, the rotating block is rotatably mounted inside the support, the output shaft of the servo motor is fixedly connected to the rotating block, the servo motor is fixed to one side wall of the support by bolts, and the servo motor is electrically connected to the main body of the liquid chromatograph.

[0007] Furthermore, an angle disk is provided at the upper end of the rotating block, and a pointer is installed on one side wall of the rotating block, with the pointer located at the upper end of the angle disk.

[0008] Furthermore, the positioning hole is formed on the rotating column, and the positioning bolt is connected to the positioning hole by a thread.

[0009] Furthermore, the magnetic guide rail is fixed to the outer wall of the top of the rotating column by screws, the T-slot is formed on the magnetic guide rail, and the magnetic block is slidably connected to the T-slot.

[0010] Furthermore, the elastic retaining ring is fixed to one side wall of the magnetic block by a connecting rod, and one end of the elastic retaining ring has an open structure.

[0011] Furthermore, the inner diameters of the three sets of elastic retaining rings are inconsistent, and the centers of the three sets of elastic retaining rings are coaxial with the center of the injection port. The adhesive pad is bonded to the inner wall of the elastic retaining ring.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model has the following advantages: This invention utilizes a system consisting of a rotating block, a rotating column, a servo motor, three sets of magnetic guide rails, a magnetic block, and three sets of elastic retaining rings with different inner diameters. During sample injection, the servo motor drives the rotating block to rotate, thereby adjusting the rotating column from a horizontal to a vertical position. Then, the rotating column is rotated according to the syringe specifications to select an elastic retaining ring with a suitable inner diameter, which is then fixed. The syringe is then secured by the elastic retaining rings. At this point, simply pushing the magnetic block to move slowly within the magnetic guide rails allows the needle to be inserted into the injection port. This method uses the magnetic guide rails to limit and guide the syringe, which not only facilitates sample injection for operators but also provides good sample injection results, exhibiting high performance and applicability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the sample injection structure of a liquid chromatograph according to the present invention; Figure 2 The sample introduction structure of the liquid chromatograph described in this utility model is... Figure 1 Enlarged view of point A in the middle; Figure 3 This is an exploded schematic diagram showing the connection relationship between the rotating column and the rotating block in the sample injection structure of a liquid chromatograph according to the present invention.

[0014] The annotations in the attached figures are explained as follows: 1. Liquid chromatograph body; 2. Inlet; 3. Rotating column; 4. Elastic retaining ring; 5. Magnetic guide rail; 6. Support; 7. Rotating block; 8. Angle dial; 9. Pointer; 10. Servo motor; 11. Positioning bolt; 12. Positioning hole; 13. Magnetic block; 14. T-slot; 15. Rubber pad. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] like Figures 1-3 As shown, the injection structure of a liquid chromatograph in this embodiment includes a liquid chromatograph body 1, which can perform chromatographic analysis on the injected liquid. An injection port 2 is provided on one side of the upper end of the liquid chromatograph body 1 to inject the sample liquid into the chromatograph body 1. A U-shaped support 6 is provided on one side of the injection port 2, and a rotating block 7 is installed inside the support 6. A servo motor 10 is installed on one side wall of the support 6 to drive the rotating block 7 to rotate. A rotating column 3 is installed inside the rotating block 7, and the outer wall of the bottom end of the rotating column 3 is circular. There are three sets of positioning holes 12 distributed around the perimeter. A positioning bolt 11 is installed on one side wall of the rotating block 7 to position the adjusted rotating column 3. Three sets of magnetic guide rails 5 are distributed in a circle on the outer side wall of the rotating column 3 to guide the movement of the syringe. A T-slot 14 is opened in the magnetic guide rail 5. A magnetic block 13 is installed in the T-slot 14. An elastic retaining ring 4 is fixed on one side wall of the magnetic block 13 to lock and fix the syringe. A rubber pad 15 is provided on the inner wall of the elastic retaining ring 4 to protect the outer wall of the syringe.

[0017] like Figures 1-3 In this embodiment, the injection port 2 is connected to the liquid chromatograph body 1 by screws, the support 6 is fixed to the top of the liquid chromatograph body 1 by bolts, the rotating block 7 is rotatably installed in the support 6, the output shaft of the servo motor 10 is fixedly connected to the rotating block 7, the servo motor 10 is fixed to one side wall of the support 6 by bolts, the servo motor 10 is electrically connected to the liquid chromatograph body 1, the upper end of the rotating block 7 is provided with an angle disk 8, a pointer 9 is installed on one side wall of the rotating block 7, the pointer 9 is located at the upper end of the angle disk 8, the positioning hole 12 is formed on the rotating column 3, and the positioning bolt 11 is threadedly connected to the positioning hole 12. During the injection process, the servo motor 10 first drives the rotating block 7 to rotate, thereby adjusting the rotating column 3 from a horizontal state to a vertical state. Then, according to the specifications of the syringe, the rotating column 3 is rotated to select the appropriate inner diameter elastic retaining ring 4. During the rotation process, the pointer 9 and the angle disk 8 can play an auxiliary positioning role for the operator. After adjustment, the positioning bolt 11 is screwed into the positioning hole 12 to fix the adjusted rotating column 3.

[0018] like Figures 1-3 In this embodiment, the magnetic guide rail 5 is fixed to the outer wall of the top of the rotating column 3 by screws. The T-slot 14 is formed on the magnetic guide rail 5. The magnetic block 13 is slidably connected to the T-slot 14. The elastic retaining ring 4 is fixed to one side wall of the magnetic block 13 by a connecting rod. One end of the elastic retaining ring 4 is an open structure. The inner diameters of the three sets of elastic retaining rings 4 are not the same, and the center of the three sets of elastic retaining rings 4 is coaxial with the center of the injection port 2. The syringe is placed in the elastic retaining ring 4, and the rubber pad 15 can protect it. Then, the magnetic block 13 is pushed to move the syringe down and insert its needle into the injection port 2. This method can limit and guide the syringe through the magnetic guide rail 5, which not only facilitates the staff to inject the sample, but also has a good injection effect and has high performance and applicability.

[0019] The specific implementation process of this embodiment is as follows: First, place the device in place and connect the external power supply. During the sample injection process, the servo motor 10 drives the rotating block 7 to rotate, thereby adjusting the rotating column 3 from a horizontal state to a vertical state. Then, according to the specifications of the syringe, rotate the rotating column 3 to select the appropriate inner diameter elastic retaining ring 4. During the rotation, the pointer 9 and the angle plate 8 can assist the operator in positioning. After adjustment, the positioning bolt 11 is screwed into the positioning hole 12 to fix the adjusted rotating column 3. Next, the syringe is placed in the elastic retaining ring 4, and the rubber pad 15 can protect it. Then, push the magnetic block 13 to move the syringe down and insert its needle into the injection port 2. This method can limit and guide the syringe through the magnetic guide rail 5, which not only facilitates the operator's sample injection but also has a good sample injection effect, with high performance and applicability.

[0020] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sample introduction structure for a liquid chromatograph, characterized by: The system includes a liquid chromatograph body (1), with an injection port (2) reserved on one side of the upper end of the liquid chromatograph body (1). A U-shaped support (6) is provided on one side of the injection port (2). A rotating block (7) is installed in the support (6). A servo motor (10) is installed on one side wall of the support (6). A rotating column (3) is installed in the rotating block (7). Three sets of positioning holes (12) are distributed in a circle on the outer side wall of the bottom end of the rotating column (3). A positioning bolt (11) is installed on one side wall of the rotating block (7). Three sets of magnetic guide rails (5) are distributed in a circle on the outer side wall of the rotating column (3). A T-shaped groove (14) is opened in the magnetic guide rail (5). A magnetic block (13) is installed in the T-shaped groove (14). An elastic retaining ring (4) is fixed on one side wall of the magnetic block (13). A rubber pad (15) is provided on the inner wall of the elastic retaining ring (4).

2. The sample introduction structure for a liquid chromatograph according to claim 1, wherein: The injection port (2) is connected to the liquid chromatograph body (1) by screws, and the support (6) is fixed to the top of the liquid chromatograph body (1) by bolts.

3. The sample introduction structure for a liquid chromatograph according to claim 1, wherein: The rotating block (7) is rotatably installed inside the support (6). The output shaft of the servo motor (10) is fixedly connected to the rotating block (7). The servo motor (10) is fixed to one side wall of the support (6) by bolts. The servo motor (10) is electrically connected to the liquid chromatograph body (1).

4. The sample introduction structure for a liquid chromatograph according to claim 1, wherein: An angle disk (8) is provided on the upper end of the rotating block (7), and a pointer (9) is installed on one side wall of the rotating block (7). The pointer (9) is located on the upper end of the angle disk (8).

5. The sample introduction structure of claim 4, wherein: The positioning hole (12) is formed on the rotating column (3), and the positioning bolt (11) is connected to the positioning hole (12) by a thread.

6. The injection structure of a liquid chromatograph according to claim 5, characterized in that: The magnetic guide rail (5) is fixed to the outer side wall of the top of the rotating column (3) by screws. The T-slot (14) is formed on the magnetic guide rail (5). The magnetic block (13) is slidably connected to the T-slot (14).

7. The injection structure of a liquid chromatograph according to claim 6, characterized in that: The elastic retaining ring (4) is fixed to one side wall of the magnetic block (13) by a connecting rod, and one end of the elastic retaining ring (4) is an open structure.

8. The injection structure of a liquid chromatograph according to claim 7, characterized in that: The inner diameters of the three sets of elastic retaining rings (4) are not the same, and the center of the three sets of elastic retaining rings (4) is coaxial with the center of the injection port (2). The adhesive pad (15) is bonded to the inner wall of the elastic retaining ring (4).

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