Sample injector with convertible sample injection ports

Abstract

The utility model relates to the technical field of sample injectors, in particular to a sample injector with a convertible sample injection port, which comprises a box body, one side of the box body is fixedly connected with a support table, the upper surface of the support table is slidably connected with a rectangular plate, and the upper surface of the rectangular plate is slidably connected with a driving plate. A supporting frame is fixedly connected to the upper surface of the driving plate, a supporting arm is fixedly connected to the outer surface of the supporting frame, a mounting plate is slidably connected to the front face of the supporting arm, and a sample injection needle is arranged on the front face of the mounting plate. According to the sample injection device, the rectangular plate, the driving plate and other parts are arranged, so that the driving plate can drive the sample injection needle to move through the supporting frame and the supporting arm, and then the effect that the sample injection needle can correspond to different sample injection ports by arranging the rectangular plate and the driving plate is achieved; the defects that according to an existing technical scheme, sample inlets are not convenient to convert, and the test progress is affected are overcome.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sample injectors, in particular to a sample injector with switchable sample injection ports. BACKGROUND

[0002] In a chromatographic system, a device capable of quantitatively feeding an analysis sample into a chromatographic column, liquid chromatography has a septum-type sample injection port injector stop-flow injection and a six-way injection valve injection, gas chromatography has a vaporization chamber and a sample injection valve. Open-tube column gas chromatography has split injection and non-split injection, and the sample injection valve is divided into manual and automatic, and the principle is to place the sample to be tested in a sealed container, heat to volatilize the volatile components from the sample matrix, and reach equilibrium in the gas-liquid (or gas-solid) two phases. Directly extract the top gas for chromatographic analysis to test the composition and content of volatile components in the sample.

[0003] Through retrieval, the gas chromatograph box sample injector disclosed in Chinese Patent No. CN217688758U includes a fixed sleeve and a chromatograph fixed box. The bottom of the fixed sleeve is fixedly connected with a threaded sleeve. A circle of threaded circles matched with the threaded sleeve is formed on the upper surface of the chromatograph fixed box. An adjustable clamping mechanism is arranged in the fixed sleeve to clamp and fix the sample injector body. The sample injector body is placed between the two arc-shaped limiting blocks by pulling the arc-shaped limiting blocks outward through the connecting plate. The sample injector body is clamped and fixed by the two arc-shaped limiting blocks. After the connecting port at the bottom of the sample injector body is connected with the sample injection tube, the fixed sleeve is connected with the upper surface of the chromatograph fixed box through the threaded sleeve connected with the threaded circles. The upper surface of the chromatograph fixed box is always perpendicular to the sample injector body, so that the sample injector body does not deviate when moving up and down.

[0004] For the related technologies in the above, the inventors find that the following defects exist: The liner tube and sample injection pad and other components inside the sample injection port need to be cleaned and replaced regularly. In order to avoid affecting the test, the sample injection needle needs to be able to correspond to different sample injection ports. The application solves the problem that the sample injection port is not convenient to switch by the cooperation between the driving plate and the rectangular plate, so that the sample injection needle can correspond to different sample injection ports. CONTENT OF THE UTILITY MODEL

[0005] In order to correspond to different sample injection ports, the application provides a sample injector with switchable sample injection ports.

[0006] The application provides a sample injector with switchable sample inlets. The technical scheme is as follows: a sample injector with switchable sample inlets comprises a box body, a supporting table is fixedly connected to one side of the box body, a rectangular plate is slidably connected to the upper surface of the supporting table, a driving plate is slidably connected to the upper surface of the rectangular plate, a supporting frame is fixedly connected to the upper surface of the driving plate, a supporting arm is fixedly connected to the outer surface of the supporting frame, an installation plate is slidably connected to the front surface of the supporting arm, a sample injection needle is arranged on the front surface of the installation plate, two sample inlet bodies are arranged in the box body, and a first positioning opening is arranged on the outer surface of the driving plate.

[0007] Optionally, a sealing cover is arranged above the box body, and two sample injection holes are arranged on the upper surface of the sealing cover.

[0008] Optionally, a cylinder is fixedly arranged on the front surface of the installation plate, and a clamping piece is fixedly connected to the piston rod of the cylinder.

[0009] Optionally, two fixing pieces are slidably connected to the front surface of the installation plate, and a limiting piece is fixedly connected to the front surface of the installation plate.

[0010] Optionally, a first motor is fixedly arranged in the supporting arm, a gear is fixedly connected to the output end of the first motor, and a rack is slidably connected to the inside of the supporting arm.

[0011] Optionally, a supporting plate is fixedly connected to the outer surface of the supporting arm, and a second motor is fixedly arranged in the protective shell.

[0012] Optionally, a placing disc is rotatably connected to the front surface of the driving plate, a plurality of placing holes are arranged on the upper surface of the placing disc, and a second positioning opening is arranged on the upper surface of the placing disc.

[0013] In summary, the application has the following beneficial technical effects:

[0014] 1. The rectangular plate and the driving plate are arranged, the driving plate can drive the sample injection needle to move through the supporting frame and the supporting arm, the sample injection needle can correspond to different sample inlets through the arrangement of the rectangular plate and the driving plate, the sample inlets can be conveniently switched, and the test progress is not affected.

[0015] 2. The installation plate and the rack are arranged, the first motor can drive the gear to rotate through the cooperation of the installation plate and the rack, the gear drives the rack and the installation plate to slide up and down through rotation, and the height of the sample injection needle is adjusted through the arrangement of the installation plate and the rack. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0017] Figure 2 yes Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the overall side structure in an embodiment of this application;

[0019] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point B;

[0020] Figure 5 This is a schematic diagram of the sealing cap structure in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of the rack structure in an embodiment of this application.

[0022] Reference numerals in the attached drawings: 1. Housing; 2. Support platform; 3. Rectangular plate; 4. Drive plate; 5. Support frame; 6. Support arm; 7. Mounting plate; 8. Injection needle; 9. Injection port body; 10. First positioning port; 11. Sealing cap; 12. Injection hole; 13. Cylinder; 14. Clamping device; 15. Fixing device; 16. Limiting device; 17. First motor; 18. Gear; 19. Rack; 20. Support plate; 21. Second motor; 22. Placement tray; 23. Placement hole; 24. Second positioning port. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1-6 The figure provides a further detailed description of this application.

[0024] This application discloses an injector with a convertible inlet. For example... Figure 1 , 2The utility model provides a kind of sample injector with interchangeable sample inlet shown in 1,3,4,5,6, including box 1, two sample inlet bodies 9 are installed in the inside of box 1, sample inlet body 9 is constituted by heating device and fixed nut etc., sample inlet body 9 is installed with lining pipe, sample pad etc.

[0025] Please refer to Figure 1 、 3 、5, the upper portion of box 1 is provided with sealing cover 11, sealing cover 11 plays the protection effect to sample inlet body 9, the upper surface of sealing cover 11 is provided with two sample holes 12, each sample hole 12 corresponds with one sample inlet body 9.

[0026] Please refer to Figure 1 、 3 、4,6, the fixed front surface of mounting plate 7 is installed with pneumatic cylinder 13, pneumatic cylinder 13 is used to drive sample needle 8 sampling and sampling, the output end of pneumatic cylinder 13 is fixedly connected with clamp 14, recess is set on the outer surface of clamp 14, clamp 14 is connected with the top of sample needle 8 piston rod by recess.

[0027] Please refer to Figure 1 、 3 、4,6, the front surface of mounting plate 7 is slidably connected with two fixed parts 15, fixed part 15 is clamped to the both sides of sample needle 8 by sliding, the front surface of mounting plate 7 is fixedly connected with limit part 16, limit part 16 is used to limit the flange of sample needle 8.

[0028] Please refer to Figure 1 、 3 、4,6, the inside of support arm 6 is slidably connected with rack 19, rack 19 is fixedly connected with mounting plate 7, the output end of first motor 17 is fixedly connected with gear 18, gear 18 is engaged with rack 19, gear 18 drives rack 19 and mounting plate 7 to slide up and down by rotating, to adjust the height of sample needle 8.

[0029] Please refer to Figure 1 、 2 , 3, 5, the front of the driving plate 4 is rotationally connected with a placing disc 22, a plurality of placing holes 23 are formed in the upper surface of the placing disc 22, the placing holes 23 are used for placing test tubes containing test samples, a second positioning opening 24 is formed in the upper surface of the placing disc 22, and the placing disc 22 is rotatable to make different placing holes 23 correspond to the sampling needle 8, so that the sampling needle 8 can complete sampling, and the placing disc 22 is reset to make the second positioning opening 24, the first positioning opening 10, the sampling hole 12, the sampling opening body 9 and the sampling needle 8 correspond to each other, so that the sampling needle 8 can realize sampling.

[0030] Please refer to Figure 1 、 2 , 3, the outer surface of the support arm 6 is fixedly connected with a support plate 20, the lower surface of the support plate 20 is fixedly installed with a second motor 21, the output end of the second motor 21 is fixedly connected with the upper surface of the placing disc 22, and the second motor 21 drives the placing disc 22 to rotate through the output end.

[0031] The implementation principle of the sampling opening convertible sampler in the embodiment of the application is as follows: the sliding rectangular plate 3 drives the driving plate 4 and other components to slide, so that the first positioning opening 10 corresponds to one sampling hole 12, the sample test tube is placed in the placing hole 23, the second motor 21 is started, the output end of the second motor 21 drives the placing disc 22 to rotate, so that the sample test tube corresponds to the sampling needle 8, the first motor 17 is started, the first motor 17 drives the gear 18 to rotate, the gear 18 drives the rack 19 to slide, the rack 19 drives the mounting plate 7 and other components to slide, so that the needle tip of the sampling needle 8 enters the inside of the sample test tube, the air cylinder 13 is started, the output end of the air cylinder 13 drives the piston rod of the sampling needle 8 to slide through the clamping piece 14, so that the sample is sucked into the inside of the sampling needle 8, sampling is completed, the first motor 17 is started, the sampling needle 8 is reset, the second motor 21 is started, so that the second positioning opening 24 corresponds to the first positioning opening 10, the first motor 17 is started, the needle tip of the sampling needle 8 enters the inside of the sampling opening body 9 through the second positioning opening 24, the first positioning opening 10 and the sampling hole 12, the air cylinder 13 is started, the sample in the inside of the sampling needle 8 is injected into the lining pipe in the inside of the sampling opening body 9, sampling is completed, the first motor 17 is started, the sampling needle 8 is reset, the driving plate 4 is slid, the driving plate 4 drives the support frame 5, the support arm 6 and other components to slide, so that the sampling needle 8, the second positioning opening 24 and the first positioning opening 10 correspond to another sampling hole 12, and the conversion of the sampling opening body 9 is completed.

[0032] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A sample injector with switchable sample inlet comprising a housing (1), characterized in that: The side of the box (1) is fixedly connected with a support table (2), the upper surface of the support table (2) is slidably connected with a rectangular plate (3), the upper surface of the rectangular plate (3) is slidably connected with a driving plate (4), the upper surface of the driving plate (4) is fixedly connected with a support frame (5), the outer surface of the support frame (5) is fixedly connected with a support arm (6), the front surface of the support arm (6) is slidably connected with a mounting plate (7), the front surface of the mounting plate (7) is provided with a sample injection needle (8), the inside of the box (1) is provided with two sample injection port bodies (9), and the outer surface of the driving plate (4) is provided with a first positioning opening (10).

2. The sample injector with switchable sample inlet according to claim 1, characterized in that: The upper surface of the sealing cover (11) is provided with two sample injection holes (12).

3. The sample injector with switchable sample inlet according to claim 1, characterized in that: The fixed front surface of the mounting plate (7) is provided with a gas cylinder (13), and the piston rod of the gas cylinder (13) is fixedly connected with a clamping piece (14).

4. The sample injector with switchable sample inlet according to claim 1, characterized in that: The front surface of the mounting plate (7) is slidably connected with two fixing pieces (15), and the front surface of the mounting plate (7) is fixedly connected with a limiting piece (16).

5. The sample injector with switchable sample inlet according to claim 1, characterized in that: The inside of the support arm (6) is fixedly provided with a first motor (17), the output end of the first motor (17) is fixedly connected with a gear (18), and the inside of the support arm (6) is slidably connected with a rack (19).

6. The sample injector of claim 1, wherein: The outer surface of the support arm (6) is fixedly connected with a support plate (20), and the lower surface of the support plate (20) is fixedly provided with a second motor (21).

7. The sample injector of claim 1, wherein: The front surface of the driving plate (4) is rotatably connected with a placing disc (22), the upper surface of the placing disc (22) is provided with a plurality of placing holes (23), and the upper surface of the placing disc (22) is provided with a second positioning opening (24).

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