Liquid chromatograph

Abstract

The utility model belongs to the technical field of chromatographic instrument equipment, and relates to a liquid chromatograph which comprises a bottom plate and a chromatographic instrument body fixedly connected to the bottom plate, the chromatographic instrument body is communicated with a six-way valve, the six-way valve is fixedly connected with the bottom plate through a supporting rod, a lower plate is arranged on the bottom plate, the lower surface of the lower plate is connected with the bottom plate through a moving assembly, and the moving assembly is arranged on the bottom plate. First electric push rods are fixedly connected to the two ends of the upper surface of the lower plate, an upper plate is fixedly connected to the top ends of the two first electric push rods, a lower arc groove is formed in the upper surface of the lower plate, penetrates through the bottom plate and is matched with the six-way valve, and an upper arc groove is formed in the lower surface of the upper plate and is matched with the lower arc groove. Fixing assemblies are arranged in the upper arc groove and the lower arc groove. The injector is fixed between the upper arc groove and the lower arc groove through the fixing assembly, so that the injector can have a stable injection state, meanwhile, the injector fixing device can adapt to injectors of different specifications and can be flexibly adjusted according to the specifications of the injectors, and the universality of the injector fixing device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatograph equipment, and more specifically, to a liquid chromatograph. Background Art

[0002] A liquid chromatograph refers to an instrument that first separates a mixture by utilizing the difference in the partition ratio of the mixture between a liquid-solid or two immiscible liquids, and then analyzes and identifies it. According to whether the stationary phase is a liquid or a solid, the liquid chromatograph is further divided into liquid-liquid chromatography (LLC) and liquid-solid chromatography (LSC). A modern liquid chromatograph consists of parts such as a high-pressure infusion pump, a sampling system, a temperature control system, a chromatographic column, a detector, and a signal recording system.

[0003] There is a liquid chromatograph sampling device with a publication number of CN220340130U. The syringe can be conveniently aligned with the port of the six-way valve through the injection rod and the injection port. Then, through the bearing plate, when using the syringe, the syringe can have a support point to be stable, ensuring the stability of the injection process, thus making the sampling more convenient. The syringe can also be lifted by the positioning rod and the limit block, and the syringe is more stably restricted by the arc-shaped limit block.

[0004] However, there are still deficiencies in the above technology. Although several injection ports are opened on the injection rod to inject liquid samples, the specifications and models of syringes are diverse. The fixedly opened injection ports can only adapt to several fixed specifications of syringes, and there will still be a situation where the outer diameter of the syringe does not match the diameter of the injection port, and it cannot be flexibly adjusted according to the specifications of the syringe, lacking versatility. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a liquid chromatograph, which solves the problem mentioned in the above background art that although several injection ports are opened on the injection rod to inject liquid samples, the specifications and models of syringes are diverse, the fixedly opened injection ports can only adapt to several fixed specifications of syringes, and there will still be a situation where the outer diameter of the syringe does not match the diameter of the injection port, and it cannot be flexibly adjusted according to the specifications of the syringe, lacking versatility.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is a liquid chromatograph, which includes a bottom plate and a chromatograph body fixedly connected to the bottom plate. The chromatograph body is communicated with a six-way valve, and the six-way valve is fixedly connected to the bottom plate through a support rod. A lower plate is arranged on the bottom plate, and the lower surface of the lower plate is connected to the bottom plate through a moving component. At both ends of the upper surface of the lower plate, a first electric push rod is fixedly connected. The tops of the two first electric push rods are fixedly connected to an upper plate. A lower arc groove is opened on the upper surface of the lower plate, and the lower arc groove penetrates through the bottom plate and cooperates with the six-way valve. An upper arc groove is opened on the lower surface of the upper plate, and the upper arc groove cooperates with the lower arc groove. A fixing component is arranged in the upper arc groove and the lower arc groove.

[0007] As a preferred solution, the moving component includes a driving motor fixedly connected to the bottom plate. The output shaft of the driving motor is connected to a lead screw through a coupling. The other end of the lead screw is connected to a fixing plate through a bearing, and the fixing plate is fixedly connected to the bottom plate. A moving block is threadedly connected to the outside of the lead screw, and the upper surface of the moving block is fixedly connected to the lower surface of the lower plate.

[0008] As a preferred solution, the lower surface of the moving block is fixedly connected with limiting blocks symmetrically arranged with respect to the moving block, and limiting grooves slidably connected to the limiting blocks are opened on the bottom plate.

[0009] As a preferred solution, the fixing component includes fixing blocks respectively fixedly connected to the upper arc groove and the lower arc groove. A chute is opened on the opposite surface of the two fixing blocks, and a sliding rod is slidably connected in the chute. Both ends of the sliding rod are respectively located inside and outside the chute. The outer end of the sliding rod is fixedly connected with an arc-shaped plate, and a spring is fixedly connected between the arc-shaped plate and the fixing block. The spring is sleeved on the outside of the sliding rod.

[0010] As a preferred solution, the arc-shaped plate is a rubber plate.

[0011] As a preferred solution, symmetrically arranged support feet are fixedly connected to both sides of the lower end of the bottom plate, and suction cups are fixedly connected to the lower ends of the support feet.

[0012] As a preferred solution, symmetrically arranged second electric push rods are fixedly connected to both sides of the lower end of the bottom plate, and moving wheels are connected to the lower ends of the second electric push rods.

[0013] Compared with the prior art, the beneficial effects of the present utility model include:

[0014] By setting the fixing component, the syringe is fixed between the upper arc groove and the lower arc groove, enabling it to have a stable injection state. At the same time, it can adapt to syringes of different specifications and can be flexibly adjusted according to the specifications of the syringe, improving the versatility of the device. Description of the Drawings

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the front view structure of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the right view structure of an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the top view structure of an embodiment of the present utility model. Detailed implementation manners

[0019] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural ways and implementation ways that can be mutually replaced. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0020] The following will be combined with the specification appendix Figures 1-4 And the specific implementation manners to explain the above technical solution in detail:

[0021] A liquid chromatograph provided by the utility model comprises a bottom plate 1 and a chromatograph body 2 fixedly connected to the bottom plate 1. The chromatograph body 2 is communicated with a six-way valve 3. The six-way valve 3 is fixedly connected to the bottom plate 1 through a support rod. A lower plate 4 is arranged on the bottom plate 1. The lower surface of the lower plate 4 is connected to the bottom plate 1 through a moving component. Two ends of the upper surface of the lower plate 4 are fixedly connected with a first electric push rod 5. The tops of the two first electric push rods 5 are fixedly connected with an upper plate 6. A lower arc groove 7 is formed in the upper surface of the lower plate 4. The lower arc groove 7 penetrates through the bottom plate 1 and is matched with the six-way valve 3. An upper arc groove 8 is formed in the lower surface of the upper plate 6. The upper arc groove 8 is matched with the lower arc groove 7. A fixing component is arranged in the upper arc groove 8 and the lower arc groove 7. When the liquid chromatograph needs to be used, the bottom plate 1 is arranged on a workbench surface. A liquid sample is drawn out of a test tube through a syringe, and then the syringe is placed in the lower arc groove 7 on the lower plate 4, that is, between the upper plate 6 and the lower plate 4. Subsequently, the first electric push rod 5 retracts, driving the upper plate 6 to move downward until the syringe is fixed between the upper arc groove 8 and the lower arc groove 7. During this process, the fixing component can fix the syringe. Preferably, when the fixing component fixes the syringe, it is ensured that the needle of the syringe can be aligned with the inlet of the six-way valve 3 first. After the syringe is fixed, the moving component works, driving the lower plate 4 to move, so that the syringe can move accordingly until the needle of the syringe can be inserted into the six-way valve 3. The sample in the syringe will enter the chromatograph body 2 for detection. During the injection process, the syringe can maintain a stable injection state. Moreover, when the upper plate 6, the lower plate 4 and the fixing component are arranged to fix the syringe, syringes of different specifications can be adapted, and flexible adjustment can be made according to the specifications of the syringe, improving the versatility of the device. After the injection is completed, the moving component drives the lower plate 4 to reset, and then the first electric push rod 5 pushes outwards, causing the upper plate 6 to rise and no longer fix the syringe. Then, the syringe after injection can be removed.

[0022] As a preferred solution, the moving component includes a driving motor 9 fixedly connected to the bottom plate 1. The output shaft of the driving motor 9 is connected to a lead screw 10 through a coupling. The other end of the lead screw 10 is connected to a fixing plate 11 through a bearing. The fixing plate 11 is fixedly connected to the bottom plate 1. A moving block 12 is threadedly connected to the outside of the lead screw 10. The upper surface of the moving block 12 is fixedly connected to the lower surface of the lower plate 4. When the moving component works, the driving motor 9 starts, thereby driving the lead screw 10 to rotate. Under the rotation of the lead screw 10, the moving block 12 will start to move in the horizontal direction. When the needle of the syringe on the lower plate 4 driven by the moving block 12 is inserted into the six-way valve 3, the driving motor 9 stops working. After the injection is completed, the driving motor 9 rotates in reverse, thereby driving the lead screw 10 to rotate in the opposite direction. The moving block 12 will drive the lower plate 4 to move away from the six-way valve 3, thus completing the reset. As a preferred solution, the lower surface of the moving block 12 is fixedly connected with limiting blocks 13 symmetrically arranged with respect to the moving block 12. Limiting grooves 14 are formed on the bottom plate 1 and are slidably connected with the limiting blocks 13, playing a role of limiting and guiding.

[0023] As a preferred solution, the fixing component includes fixing blocks 15 respectively fixedly connected to the upper arc groove 8 and the lower arc groove 7. A sliding groove 16 is formed on the opposite surface of the two fixing blocks 15. A sliding rod 17 is slidably connected in the sliding groove 16. Both ends of the sliding rod 17 are respectively located inside and outside the sliding groove 16. The outer end of the sliding rod 17 is fixedly connected with an arc-shaped plate 18. A spring 19 is fixedly connected between the arc-shaped plate 18 and the fixing block 15. The spring 19 is sleeved on the outside of the sliding rod 17. During the process of the first electric push rod 5 retracting and driving the upper plate 6 to move downward, the fixing component in the upper arc groove 8 at the upper plate 6 will move accordingly. During this process, as the arc-shaped plate 18 gradually contacts the syringe and presses the syringe downward, the sliding rods 17 at the upper arc groove 8 and the lower arc groove 7 will slide into their respective sliding grooves 16, causing the spring 19 to be compressed. When the needle of the syringe is aligned with the inlet of the six-way valve 3, the first electric push rod 5 stops working. At this time, under the action of elastic potential energy, the arc-shaped plates 18 on both sides of the syringe will fix the syringe, enabling it to maintain a stable state during injection.

[0024] In order to increase the friction and improve the fixing effect, as a preferred solution, the arc-shaped plate 18 is a rubber plate. At the same time, the rubber arc-shaped plate 18 can undergo a certain amount of elastic deformation when fixing the syringe, so as to be able to adapt to syringes of larger sizes.

[0025] In order to ensure the stability of the connection between the bottom plate 1 and the workbench surface, as a preferred solution, symmetrically arranged supporting feet 20 are fixedly connected to both sides of the lower end of the bottom plate 1. The lower ends of the supporting feet 20 are fixedly connected with suction cups 21.

[0026] For the convenience of the overall movement of the device, as a preferred solution, symmetrically arranged second electric push rods 22 are fixedly connected to both sides of the lower end of the bottom plate 1. The lower end of the second electric push rod 22 is connected to a moving wheel 23. When it is necessary to move the entire device in a non-working state, first, the suction cup 21 is no longer in a negative pressure state. Subsequently, the second electric push rod 22 is pushed downward, thereby driving the moving wheel 23 to move downward, enabling the moving wheel 23 to support the entire device until the suction cup 21 is separated from the workbench surface. Then, the device can be moved through the moving wheel 23.

[0027] Preferably, the motors, electric push rods, and liquid chromatography instruments mentioned above are mature existing technologies, so their principles and structures will not be elaborated here. The specifications and models of the motors and electric push rods can be selected according to the actual situation. When connecting the circuits, it is defaultly connected to the municipal circuit.

[0028] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the existing technology. The circuit connection adopts the conventional connection method in the existing technology and will not be elaborated here. The content not described in detail in this specification belongs to the well-known existing technology in the field of professional technicians.

[0029] The technical scope of the present utility model is not limited to the content described in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A liquid chromatograph, comprising a base plate (1) and a chromatograph body (2) fixedly connected to the base plate (1), characterized in that: The chromatograph body (2) is connected to a six-way valve (3), and the six-way valve (3) is fixedly connected to the bottom plate (1) through a support rod. A lower plate (4) is arranged on the bottom plate (1), and the lower surface of the lower plate (4) is connected to the bottom plate (1) through a moving component. The two ends of the upper surface of the lower plate (4) are fixedly connected to a first electric push rod (5), and the top of the two first electric push rods (5) is fixedly connected to an upper plate (6). The upper surface of the lower plate (4) is provided with a lower arc groove (7), and the lower arc groove (7) passes through the bottom plate (1) and cooperates with the six-way valve (3). The lower surface of the upper plate (6) is provided with an upper arc groove (8), and the upper arc groove (8) cooperates with the lower arc groove (7). Fixed components are arranged in the upper arc groove (8) and the lower arc groove (7).

2. A liquid chromatograph according to claim 1, characterized in that: The moving assembly comprises a driving motor (9) fixedly connected to a base plate (1); an output shaft of the driving motor (9) is connected to a screw rod (10) via a coupling; the other end of the screw rod (10) is connected to a fixed plate (11) via a bearing; the fixed plate (11) is fixedly connected to the base plate (1); the outer side of the screw rod (10) is threadedly connected to a moving block (12); the upper surface of the moving block (12) is fixedly connected to the lower surface of the lower plate (4).

3. A liquid chromatograph according to claim 2, characterized in that: The lower surface of the moving block (12) is fixedly connected to a limit block (13) symmetrically arranged with respect to the moving block (12), and the bottom plate (1) is provided with a limit groove (14) slidably connected to the limit block (13).

4. A liquid chromatograph according to claim 1, characterized in that: The fixing assembly comprises fixing blocks (15) respectively fixedly connected to the upper arc groove (8) and the lower arc groove (7); a sliding groove (16) is provided on opposite sides of the two fixing blocks (15); a sliding rod (17) is slidably connected in the sliding groove (16); two ends of the sliding rod (17) are respectively located inside and outside the sliding groove (16); an arc plate (18) is fixedly connected to the outer end of the sliding rod (17); a spring (19) is fixedly connected between the arc plate (18) and the fixing block (15); and the spring (19) is sleeved on the outer side of the sliding rod (17).

5. A liquid chromatograph according to claim 4, characterized in that: The arc-shaped plate (18) is a rubber plate.

6. A liquid chromatograph according to claim 1, characterized in that: The bottom end of the bottom plate (1) is fixedly connected to two sides thereof with symmetrically arranged supporting feet (20), and the bottom ends of the supporting feet (20) are fixedly connected to suction cups (21).

7. A liquid chromatograph according to claim 6, characterized in that: The lower ends of the bottom plate (1) are fixedly connected to symmetrically arranged second electric push rods (22), and the lower ends of the second electric push rods (22) are connected to moving wheels (23).

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