Automatic sampling device of liquid chromatograph

Abstract

The utility model belongs to the technical field of liquid chromatographs, and particularly relates to an automatic sampling device of a liquid chromatograph, which comprises a machine body, a mounting frame and a second motor, a control end is arranged on one side of the machine body, and supporting foot stools are arranged at the four corners of the bottom of the machine body; the mounting frames are arranged in the machine body, a lead screw is arranged between the mounting frames, a first motor is arranged on one side of each mounting frame, the output end of each first motor penetrates through the corresponding mounting frame to be connected with the corresponding lead screw, a sliding block is arranged on the surface of each lead screw, and a lifting air cylinder is arranged at the bottom of each sliding block. A suction pump is arranged at the bottom of the lifting cylinder, and a sampling head is arranged at the bottom of the suction pump; a second motor is arranged in the middle of the bottom of the machine body; the output end of the second motor penetrates through the machine body and is provided with a turntable; the structure is reasonable, the position of the sample injection head is convenient to adjust in the using process, meanwhile, the position of a test tube is convenient to adjust, and the flexibility is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid chromatographs, in particular to an automatic sample injection device for liquid chromatographs. Background Art

[0002] Liquid chromatograph refers to an instrument that uses the difference in the distribution ratio of the mixture between liquid and solid or between two immiscible liquids to separate the mixture first and then analyze and identify it. Liquid chromatographs are divided into liquid-liquid chromatography (LLC) and liquid-solid chromatography (LSC) according to whether the stationary phase is liquid or solid. Modern liquid chromatographs are composed of high-pressure infusion pumps, injection systems, temperature control systems, chromatographic columns, detectors, signal recording systems, etc. Compared with classical liquid column chromatography devices, liquid chromatographs have the characteristics of high efficiency, rapidity, and sensitivity. Liquid chromatographs can separate mixtures of high-boiling point and difficult-to-gas compounds through chromatographic column core eluents and are used in biomedicine, environmental chemistry, petrochemicals and other departments.

[0003] In the prior art, the application number is CN202121389332.5, and the application name is a liquid chromatograph automatic sampling device. The technical scheme recorded therein includes a body, a control end is installed on one side of the body, and a motor is installed on the inner bottom end of the body, the top of the motor is connected to a rotating rod, and the top of the rotating rod is fixedly connected to a turntable, and the top of the turntable is provided with a plurality of through slots, and the inner top end of the body is connected to a telescopic rod, and the surface of the telescopic rod is connected to a clamp, and the surface of the clamp is connected to a syringe. In the utility model, under the action of the limiting mechanism, by pressing the connecting plate, the connecting tube and the extrusion rod connected to the connecting plate can be moved, so that the arc plate connected to the extrusion rod can be used to limit the test tube inside the through slot, so as to prevent the test tube from moving when the syringe is operated, thereby affecting its subsequent use. At the same time, by rotating the bolt, the ball can be driven to move, so that it is convenient to move it to the inside of the groove, so as to limit the connecting tube, the extrusion rod and the arc plate.

[0004] However, there are still some shortcomings in the actual process. For example, during the sampling process, the injection head is fixed, which makes it impossible to adapt to different test tubes. For this reason, we propose a new type of automatic injection device for liquid chromatography. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problems existing in the prior art, the present utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide an automatic sample injection device for a liquid chromatograph, which is convenient for adjusting the position of the injection head and the position of the test tube during use, and has high flexibility.

[0008] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] An automatic sample injection device for a liquid chromatograph, comprising a body, a mounting frame and a second motor;

[0010] in,

[0011] A control terminal is provided on one side of the machine body, and supporting legs are provided at the four corners of the bottom of the machine body;

[0012] The mounting frame is arranged inside the machine body, a screw rod is arranged between the mounting frames, a first motor is arranged on one side of the mounting frame, and an output end of the first motor passes through the mounting frame and is connected to the screw rod, a slider is arranged on the surface of the screw rod, a lifting cylinder is arranged at the bottom of the slider, a suction pump is arranged at the bottom of the lifting cylinder, and a sampling head is arranged at the bottom of the suction pump;

[0013] A second motor is arranged in the middle of the bottom of the body, a turntable is arranged at the output end of the second motor through the body, a limiting groove is arranged on the surface of the turntable, an elastic member is arranged inside the limiting groove, and a fixing clamp is arranged at one end of the elastic member.

[0014] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, wherein: a fixing seat is arranged at the bottom of the supporting footrest, and an anti-slip pad is arranged at the bottom of the fixing seat.

[0015] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, wherein: the control end includes a display unit and a key module.

[0016] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, guide rods are further arranged between the mounting frames, and matching guide grooves are arranged on the sliding block.

[0017] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, wherein: the sliding block is provided with a threaded hole matched with the screw rod.

[0018] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, wherein: the elastic member is a return spring.

[0019] As a preferred solution of the automatic sample injection device for liquid chromatograph described in the utility model, the opposite side of the fixed clamp block is arranged in an inclined surface.

[0020] Compared with the prior art, the beneficial effects of the utility model are: through the cooperation of the mounting frame, the screw rod, the first motor and the slider, it is convenient to drive the suction pump and the sampling head to move left and right, and it is convenient to adjust the sampling position, which is suitable for different types of test tubes and has high flexibility; in addition, through the cooperation of the second motor and the turntable, it is convenient to adjust the position of the test tube, and by arranging elastic parts and fixed clamps inside the limit groove, it is convenient to fix test tubes of different sizes, and the stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the mounting frame of the utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of the limit groove of the utility model.

[0025] In the figure, 100 body, 110 control end, 120 support bracket, 200 mounting frame, 210 screw rod, 220 first motor, 230 slider, 240 lifting cylinder, 250 suction pump, 260 sampling head, 300 second motor, 310 turntable, 320 limit groove, 330 elastic member, 340 fixed clamp block. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The utility model provides the following technical solutions: an automatic sample injection device for a liquid chromatograph, which is convenient for adjusting the position of the injection head and the position of the test tube during use, and has high flexibility;

[0031] Figures 1 to 3 The figure shows a schematic structural diagram of an embodiment of an automatic sample injection device for a liquid chromatograph of the utility model, the main body of which includes a body 100, a mounting frame 200 and a second motor 300;

[0032] Please refer again Figures 1 to 3 : A control terminal 110 is installed on one side of the body 100, and support legs 120 are installed at the four corners of the bottom of the body 100. A fixing seat is installed at the bottom of the support legs 120, and an anti-slip pad is installed at the bottom of the fixing seat. The control terminal 110 includes a display unit and a button module. Further, the body 100 is used for detection, the control terminal 110 is used for human-machine operation, and the support legs 120 is used to support the body 100;

[0033] Please refer again Figures 1 to 3 The mounting frame 200 is mounted inside the machine body 100, a screw rod 210 is mounted between the mounting frames 200, a first motor 220 is mounted on one side of the mounting frame 200, and the output end of the first motor 220 passes through the mounting frame 200 and is connected to the screw rod 210, a slider 230 is mounted on the surface of the screw rod 210, a guide rod is also mounted between the mounting frames 200, and a matching guide groove is provided on the slider 230, and a threaded hole matching the screw rod 210 is provided on the slider 230, and the slider A lifting cylinder 240 is installed at the bottom of 230, a suction pump 250 is installed at the bottom of the lifting cylinder 240, and a sampling head 260 is installed at the bottom of the suction pump 250. Further, the mounting frame 200 is used to carry the screw rod 210, the screw rod 210 is used to carry the slider 230, the first motor 220 is used to drive the screw rod 210 to rotate, the slider 230 is used to move left and right to adjust the position, the lifting cylinder 240 is used to adjust the height, and the suction pump 250 and the sampling head 260 are used for sample extraction;

[0034] Please refer again Figures 1 to 3: A second motor 300 is installed in the middle of the bottom of the body 100, and a turntable 310 is installed on the output end of the second motor 300 through the body 100. A limiting groove 320 is installed on the surface of the turntable 310, and an elastic member 330 is installed inside the limiting groove 320. A fixed clamp block 340 is installed at one end of the elastic member 330. The elastic member 330 is a reset spring, and the opposite side of the fixed clamp block 340 is arranged in an inclined surface. Further, the second motor 300 and the turntable 310 are used to adjust the position of the test tube, and the limiting groove 320, the elastic member 330 and the fixed clamp block 340 are used to fix the test tube.

[0035] Working principle: During the use of the utility model, through the cooperation of the mounting frame 200, the screw rod 210, the first motor 220 and the slider 230, it is convenient to drive the suction pump 250 and the sampling head 260 to move left and right, which is convenient for adjusting the sampling position, and is suitable for different types of test tubes with high flexibility; in addition, through the cooperation of the second motor 300 and the turntable 310, the position of the test tube is convenient to adjust, and by arranging the elastic member 330 and the fixing clamp block 340 inside the limiting groove 320, it is convenient to fix the test tubes of different sizes, and the stability is good.

[0036] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid chromatograph automatic sample injection device, characterized in that: It comprises a machine body (100), a mounting frame (200) and a second motor (300); in, A control terminal (110) is provided on one side of the machine body (100), and supporting legs (120) are provided at four corners of the bottom of the machine body (100); The mounting frame (200) is arranged inside the machine body (100), a screw rod (210) is arranged between the mounting frames (200), a first motor (220) is arranged on one side of the mounting frame (200), and an output end of the first motor (220) passes through the mounting frame (200) and is connected to the screw rod (210), a slider (230) is arranged on the surface of the screw rod (210), a lifting cylinder (240) is arranged at the bottom of the slider (230), a suction pump (250) is arranged at the bottom of the lifting cylinder (240), and a sampling head (260) is arranged at the bottom of the suction pump (250); A second motor (300) is arranged in the middle of the bottom of the machine body (100); a turntable (310) is arranged at the output end of the second motor (300) penetrating the machine body (100); a limiting groove (320) is arranged on the surface of the turntable (310); an elastic member (330) is arranged inside the limiting groove (320); and a fixing clamp (340) is arranged at one end of the elastic member (330).

2. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: A fixing seat is arranged at the bottom of the supporting foot frame (120), and an anti-slip pad is arranged at the bottom of the fixing seat.

3. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: The control terminal (110) comprises a display unit and a key module.

4. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: A guide rod is also provided between the mounting frames (200), and a matching guide groove is provided on the slider (230).

5. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: The slider (230) is provided with a threaded hole that matches the screw rod (210).

6. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: The elastic member (330) is a return spring.

7. The automatic sample injection device for liquid chromatography according to claim 1, characterized in that: The opposite side of the fixing clamp block (340) is arranged in an inclined surface.

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