Mechanical linkage-based automatic sampling mechanism for gas chromatograph

Abstract

The application provides a mechanical linkage-based automatic sample injection mechanism of a gas chromatograph, relates to the technical field of sample injection of a gas chromatograph, and comprises a base corresponding to the gas chromatograph, a support frame fixed on the base, a rotating structure arranged in the support frame, a driving structure arranged on the support frame, the rotating structure corresponding to the driving structure, a plurality of sample injection structures arranged on the rotating structure, a connecting structure arranged between the sample injection structures and the rotating structure, a height adjusting structure and a reagent bottle arranged on the base, the reagent bottle corresponding to the sample injection structure, and the height adjusting structure corresponding to the rotating structure. In the application, the rotating structure is arranged in the support frame, and the connecting structure is arranged between the sample injection structure and the rotating structure. The sample injection structure can be driven to rotate by the rotating structure, and the gas or liquid in the reagent bottle can be extracted by the sample injection structure, so that multiple sample injections are realized, the work efficiency is improved, the work intensity of workers is reduced, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas chromatograph sample introduction technology, specifically to an automatic sample introduction mechanism for gas chromatographs based on mechanical linkage. Background Technology

[0002] Gas chromatography (GC) is an important instrument for separating and determining low-boiling-point mixtures. It is used for instrumental analysis experiments in chemical engineering, bioengineering, and food science, as well as for scientific research and routine analysis. It is used to detect and analyze gaseous substances or substances that can be converted into gases at certain temperatures. Due to the different physical properties of substances, the partition coefficients of each component in the sample between the gas phase and the stationary liquid phase are different. When the vaporized sample is carried into the chromatographic column by the carrier gas, the components undergo repeated partitioning between the two phases. Because the stationary phase has different adsorption or dissolution capacities for each component, even if the carrier gas flow rate is the same, the running speed of each component in the chromatographic column is different. After a certain period of flow, they separate from each other and leave the chromatographic column in sequence to enter the detector. The generated signals are amplified and plotted on the recorder as the chromatographic peaks of each component. Most existing gas chromatographs use manual sample injection. First, manual sample injection is inefficient. Second, manual sample injection requires the manual use of a syringe to extract gas or liquid, which makes it impossible to accurately control the sample volume, thus easily leading to errors.

[0003] Therefore, the present invention provides an automatic sample injection mechanism for a gas chromatograph based on mechanical linkage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an automated gas chromatograph injection mechanism based on mechanical linkage, thereby solving the problems mentioned in the background art. This invention enables multiple injections, improving work efficiency, reducing worker workload, and thus lowering labor costs. It also allows for more precise control of the injection volume, preventing errors caused by excessive or insufficient injection. Furthermore, it prevents damage to the gas chromatograph, extending its service life. The extrusion structure facilitates sample extraction and injection, reducing the overall cost of the device. Simultaneous injection and extraction further enhance the device's efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an automatic sample injection mechanism for a gas chromatograph based on mechanical linkage, comprising a base corresponding to the gas chromatograph, a support frame fixed on the base, a rotating structure installed inside the support frame, a driving structure installed on the support frame, the rotating structure corresponding to the driving structure, multiple injection structures installed on the rotating structure, a connecting structure installed between the injection structures and the rotating structure, a height adjustment structure and a reagent bottle installed on the base, the reagent bottle corresponding to the injection structure, the height adjustment structure corresponding to the rotating structure, a vaporization structure installed inside the base, the vaporization structure corresponding to the injection structure, the injection structure including a sample delivery tube, a squeezing structure installed inside the sample delivery tube, the squeezing structure corresponding to the rotating structure, a heating structure and a discharge structure installed inside the vaporization structure, the discharge structure corresponding to the sample delivery tube, and a pushing structure installed on the driving structure, the pushing structure including a push rod.

[0006] Furthermore, the drive structure includes a motor fixed on a support frame, a first rotating shaft and a second rotating shaft rotatably fitted within the support frame, the output end of the motor being fixedly connected to the first rotating shaft, a first gear fixed on the first rotating shaft, a second gear fixed on the second rotating shaft, the first gear and the second gear meshing, the rotation structure includes a rotating frame, a sliding groove formed within the rotating frame, a sliding rod fixed to the lower side of the second rotating shaft, the sliding rod corresponding to the sliding groove, the height adjustment structure includes an electric cylinder fixed on a base, a rotating plate fixed to the output end of the electric cylinder, a rotating groove formed within the rotating frame, the rotating groove corresponding to the rotating plate, and a push rod rotatably connected to the first rotating shaft.

[0007] Furthermore, the connection structure includes multiple mounting slots opened at the bottom of the rotating plate, the mounting slots being threaded into the sample delivery tube, a slot being opened in the base, the slot corresponding to the reagent bottle, a sampling port being opened at the top of the reagent bottle, a blocking block being installed in the sampling port, a first telescopic rod being fixed between the blocking block and the reagent bottle, the first telescopic rod including a first rod body and a second rod body, the first rod body and the second rod body being slidably connected, and a first spring being fixed between the first rod body and the second rod body.

[0008] Furthermore, the sample delivery tube includes a tube body, with a discharge port at the bottom of the tube body. An injection tube is slidably fitted inside the discharge port. A first blocking plate is fixed at the top of the injection tube. A first connecting port and a second connecting port are opened inside the injection tube. The first connecting port corresponds to the tube body and the discharge port. A limiting plate is fixed on the injection tube, and multiple second springs are fixed between the limiting plate and the tube body.

[0009] Furthermore, the extrusion structure includes a first piston that slides within the tube body. A second telescopic rod and multiple third springs are fixed between the first piston and the tube body. The second telescopic rod includes a third rod body and a fourth rod body. The third rod body is a hollow structure. The third rod body and the fourth rod body are slidably connected. Multiple through holes are opened inside the rotating frame. The through holes correspond to the push rods and are connected to the third rod bodies. The push rods correspond to the third rod bodies. A first electromagnet is fixed inside the first piston. The first electromagnet corresponds to the tube body.

[0010] Furthermore, the vaporization structure includes a vaporization chamber opened in the base, and the discharge structure includes a second piston that is slidably fitted in the vaporization chamber. A second electromagnet is fixed inside the second piston, and the second electromagnet corresponds to the cavity wall of the vaporization chamber.

[0011] Furthermore, the heating structure includes a first heating tube fixed inside the second piston and a plurality of second heating tubes fixed inside the base. The second heating tubes are located on the periphery of the vaporization chamber, and a plurality of third telescopic rods are fixed between the second piston and the bottom of the vaporization chamber.

[0012] Furthermore, the third telescopic rod includes a fifth rod body and a sixth rod body, the fifth rod body and the sixth rod body are slidably connected, and multiple fourth springs are fixed between the fifth rod body and the sixth rod body. An inlet is provided at the bottom of the vaporization chamber, and the inlet is connected to the inlet end of the gas chromatograph. Multiple third electromagnets are fixed inside the base, and the third electromagnets are located around the inlet.

[0013] Furthermore, the base has a connecting port that corresponds to the injection tube. A plugging ring is installed inside the connecting port. Multiple fifth springs are fixed between the plugging ring and the base. A conical block is fixed at the bottom inside the plugging ring. Multiple third connecting ports are opened on the periphery of the plugging ring. A limiting rod is fixed inside the connecting port and corresponds to the third connecting port. A sample injection tube is fixed inside the second piston and corresponds to the connecting port and the sample injection port.

[0014] Furthermore, a sliding tube is fixed inside the injection tube, a connecting tube is slidably fitted inside the sliding tube, a plurality of sixth springs are fixed between the sliding tube and the connecting tube, a second blocking plate is fixed at the bottom of the connecting tube, a fourth connecting port is opened on the connecting tube, and a fifth connecting port is opened on the second blocking plate.

[0015] The beneficial effects of this invention are:

[0016] 1. A rotating structure is installed inside the support frame, and a connecting structure is installed between the sample injection structure and the rotating structure. The rotating structure can drive the sample injection structure to rotate, and the sample injection structure can extract the gas or liquid in the reagent bottle, thereby realizing multiple injections, improving work efficiency, reducing the labor intensity of workers, and thus reducing labor costs. It can also control the injection volume more precisely, thereby preventing errors caused by too much or too little injection, thus ensuring the accuracy of the experiment. It also facilitates the replacement of the sample injection structure, thereby preventing errors caused by sample mixing when injecting two different samples.

[0017] 2. Installing a vaporization structure inside the base allows for the vaporization of liquid samples, facilitating sample injection. This reduces the vaporization workload of the gas chromatograph, improving efficiency and preventing blockages caused by incomplete vaporization, thus extending its lifespan.

[0018] 3. Installing a squeezing structure inside the sample delivery tube allows for the extrusion of samples and the extraction of samples, thus facilitating sampling and injection and reducing the overall cost of the device.

[0019] 4. A height adjustment structure is installed on the base to adjust the height of the rotating frame. By rotating the rotating frame, the position of the sample injection structure can be adjusted, allowing the device to inject and extract samples simultaneously, thereby improving the device's working efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of the automatic sample injection mechanism for a gas chromatograph based on mechanical linkage according to the present invention.

[0021] Figure 2 This is a schematic diagram of the overall assembly cross-sectional structure of the automatic sample injection mechanism for a gas chromatograph based on mechanical linkage according to the present invention.

[0022] Figure 3 for Figure 2 A schematic diagram at point A in the middle;

[0023] Figure 4 for Figure 2 A schematic diagram at point B in the middle;

[0024] Figure 5 This is a schematic diagram of the assembly structure of the rotating frame in the automatic sample injection mechanism of the gas chromatograph based on mechanical linkage of the present invention.

[0025] Figure 6 This is a schematic diagram of the assembly cross-sectional structure of the sample delivery tube in the automatic sample injection mechanism of the gas chromatograph based on mechanical linkage of the present invention.

[0026] Figure 7 This is a schematic diagram of the assembly structure of the rotating plate and rotating frame in the automatic sample injection mechanism of the gas chromatograph based on mechanical linkage of the present invention.

[0027] Figure 8 This is a schematic diagram of the assembly structure of the first gear and the second gear in the automatic sample injection mechanism of the gas chromatograph based on mechanical linkage of the present invention.

[0028] Figure 9 This is a schematic diagram of the assembly structure of the injection tube in the automatic injection mechanism of the gas chromatograph based on mechanical linkage of the present invention.

[0029] Figure 10 This is a schematic diagram of the assembly structure of the reagent bottle in the automatic sample injection mechanism of the gas chromatograph based on mechanical linkage of the present invention;

[0030] In the diagram: 1. Base; 2. Support frame; 3. Motor; 4. First rotating shaft; 5. First gear; 6. Second rotating shaft; 7. Second gear; 8. Rotating frame; 9. Slide rod; 10. Slide groove; 11. Electric cylinder; 12. Rotating plate; 13. Rotating groove; 14. Slot; 15. Reagent bottle; 16. First telescopic rod; 17. First rod body; 18. Second rod body; 19. First spring; 20. Sampling port; 21. Block; 22. Through hole; 23. Mounting groove; 24. Sample delivery tube; 25. Tube body; 26. Injection tube; 27. Discharge port; 28. First connecting port; 29. ​​Second connecting port; 30. First blocking plate; 31. Limiting plate; 32. Second spring; 33. Third spring; 34. 35. Second telescopic rod; 36. Third rod body; 37. Fourth rod body; 38. First piston; 39. First electromagnet; 40. Push rod; 41. Vaporization chamber; 42. First heating tube; 43. Second piston; 44. Second electromagnet; 45. Second heating tube; 46. Third telescopic rod; 47. Fifth rod body; 48. Sixth rod body; 49. Fourth spring; 50. Sample inlet; 51. Third electromagnet; 52. Connecting port; 53. Fifth spring; 54. Plug ring; 55. Third connecting port; 56. Limiting rod; 57. Sample inlet tube; 58. Sliding tube; 59. Sixth spring; 60. Fourth connecting port; 61. Fifth connecting port; 62. Connecting tube; 63. Second plug plate; 64. Conical block. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Please see Figures 1 to 10This invention provides a technical solution: an automatic sample injection mechanism for a gas chromatograph based on mechanical linkage, including a base 1 corresponding to the gas chromatograph, a support frame 2 fixed on the base 1, a rotating structure installed inside the support frame 2, a driving structure installed on the support frame 2, the rotating structure corresponding to the driving structure, multiple injection structures installed on the rotating structure, a connecting structure installed between the injection structures and the rotating structure, a height adjustment structure and a reagent bottle 15 installed on the base 1, the reagent bottle 15 corresponding to the injection structure, the height adjustment structure corresponding to the rotating structure, a vaporization structure installed inside the base 1, the vaporization structure corresponding to the injection structure, the injection structure including a sample delivery tube 24, a squeezing structure installed inside the sample delivery tube 24, the squeezing structure corresponding to the rotating structure, a heating structure and a discharge structure installed inside the vaporization structure, the discharge structure corresponding to the sample delivery tube 24, and a pushing structure installed on the driving structure, the pushing structure including a push rod 39.

[0033] In this embodiment, the driving structure includes a motor 3 fixed on a support frame 2. A first rotating shaft 4 and a second rotating shaft 6 are rotatably fitted inside the support frame 2. The output end of the motor 3 is fixedly connected to the first rotating shaft 4. A first gear 5 is fixed on the first rotating shaft 4, and a second gear 7 is fixed on the second rotating shaft 6. The first gear 5 and the second gear 7 mesh. The rotating structure includes a rotating frame 8. A sliding groove 10 is provided inside the rotating frame 8. A sliding rod 9 is fixed to the lower side of the second rotating shaft 6. The sliding rod 9 corresponds to the sliding groove 10. The height adjustment structure includes an electric cylinder 11 fixed on a base 1. A rotating plate 12 is fixed to the output end of the electric cylinder 11. A rotating groove 13 is provided inside the rotating frame 8. The rotating groove 13 corresponds to the rotating plate 12. A push rod 39 is rotatably connected to the first rotating shaft 4.

[0034] Specifically, when the position of the sample delivery tube 24 needs to be rotated, the motor 3 is started, causing the first rotating shaft 4 to rotate, which in turn drives the first gear 5 to rotate. The first gear 5 meshes with the second gear 7 and rotates, thereby driving the rotating plate 12 to rotate, which in turn drives the sample delivery tube 24 on the rotating plate 12 to rotate, thus allowing the position of the sample delivery tube 24 to be adjusted. When it is necessary to inject or extract samples through the sample delivery tube 24, the electric cylinder 11 is started, causing the electric cylinder 11 to drive the rotating plate 12 to move up and down, which in turn drives the rotating frame 8 to slide up and down. The rotating frame 8 slides up and down along the slide rod 9. At this time, the cross-shaped structure of the slide rod 9 can ensure that the first rotating shaft 4 can drive the rotating frame 8 to rotate, thus achieving simultaneous up and down sliding and rotation, allowing the sample delivery tube 24 to move in a spiral manner, thereby reducing the movement time between sampling and injection, and further improving work efficiency.

[0035] The connection structure includes multiple mounting slots 23 at the bottom of the rotating plate 12, which are threaded into the sample delivery tube 24. A slot 14 is provided inside the base 1, corresponding to the reagent bottle 15. A sampling port 20 is provided at the top of the reagent bottle 15, and a blocking block 21 is installed inside the sampling port 20. A first telescopic rod 16 is fixed between the blocking block 21 and the reagent bottle 15. The first telescopic rod 16 includes a first rod body 17 and a second rod body 18, which are slidably connected. A first spring 19 is fixed between the second rod body 18 and the sample delivery tube 24, which includes a tube body 25. The bottom of the tube body 25 is provided with a discharge port 27. An injection tube 26 is slidably fitted inside the discharge port 27. A first blocking plate 30 is fixed to the top of the injection tube 26. A first connecting port 28 and a second connecting port 29 are provided inside the injection tube 26. The first connecting port 28 corresponds to the tube body 25 and the discharge port 27. A limiting plate 31 is fixed on the injection tube 26. Multiple second springs 32 are fixed between the limiting plate 31 and the tube body 25.

[0036] Specifically, during sampling, the sample delivery tube 24 is under negative pressure and moves downward, causing the injection tube 26 to be inserted into the outlet 27. This causes the injection tube 26 to be stopped by the block 21, compressing the second spring 32 and causing the first blocking plate 30 to slide upwards. At this time, the block 21 is pressed into the reagent bottle 15, the first telescopic rod 16 is compressed, and the injection tube 26 is fully inserted into the sampling port 20. Thus, the tube body 25 is connected to the reagent bottle 15 through the first connecting port 28 and the second connecting port 29. When 5 is connected, the reagent in reagent bottle 15 can be extracted to achieve sampling. After sampling is completed, injection tube 26 moves upward, sampling port 20 is blocked again by block 21, negative pressure in tube body 25 can prevent sample overflow, second spring 32 rebounds, and the discharge port 27 is blocked again by first block plate 30, so that first connecting port 28 is sealed by the inner wall of discharge port 27, thereby helping to prevent sample overflow and ensuring that the sample can remain in tube body 25, thus ensuring feeding effect.

[0037] The extrusion structure includes a first piston 37 that slides within the tube 25. A second telescopic rod 34 and multiple third springs 33 are fixed between the first piston 37 and the tube 25. The second telescopic rod 34 includes a third rod body 35 and a fourth rod body 36. The third rod body 35 is a hollow structure. The third rod body 35 and the fourth rod body 36 are slidably connected. Multiple through holes 22 are provided inside the rotating frame 8. The through holes 22 correspond to the push rod 39 and are connected to the third rod body 35. The push rod 39 corresponds to the third rod body 35. A first electromagnet 38 is fixed inside the first piston 37 and corresponds to the tube 25.

[0038] Specifically, during sampling, the first piston 37 is attracted and fixed to the bottom of the tube 25 by the first electromagnet 38. When sampling, the first electromagnet 38 is de-energized, causing the third spring 33 to rebound and drive the first piston 37 to return to its original position, thus enabling the extraction process. During injection, the push rod 39 passes through the through hole 22 and pushes the first piston 37 downward, increasing the pressure inside the tube 25. When the injection tube 26 moves upward, the greater pressure can push the sample out of the tube 25. Compared to manual injection, this method is more efficient and allows for more precise control of the sampling and injection times, thereby controlling the amount of sample injected and ensuring the accuracy of the experimental results.

[0039] The vaporization structure includes a vaporization chamber 40 located within the base 1. The discharge structure includes a second piston 42 slidably fitted within the vaporization chamber 40. A second electromagnet 43 is fixed within the second piston 42, and the second electromagnet 43 corresponds to the wall of the vaporization chamber 40. The heating structure includes a first heating tube 41 fixed within the second piston 42 and multiple second heating tubes 44 fixed within the base 1. The second heating tubes 44 are located around the periphery of the vaporization chamber 40. Multiple third telescopic rods 45 are fixed between the second piston 42 and the bottom of the vaporization chamber 40. Each third telescopic rod 45 includes a fifth rod body 46 and a sixth rod body 47, which are slidably connected. Multiple fourth springs 48 are fixed between the fifth rod body 46 and the sixth rod body 47. An inlet 49 is located at the bottom of the vaporization chamber 40 and is connected to the injection end of a gas chromatograph. Multiple third electromagnets 50 are fixed within the base 1. Three electromagnets 50 are located around the injection port 49. A connecting port 51 is provided on the base 1, which corresponds to the injection tube 26. A plugging ring 53 is installed inside the connecting port 51. Multiple fifth springs 52 are fixed between the plugging ring 53 and the base 1. A conical block 63 is fixed at the bottom inside the plugging ring 53. Multiple third connecting ports 54 are provided around the plugging ring 53. A limiting rod 55 is fixed inside the connecting port 51, which corresponds to the third connecting port 54. An injection tube 56 is fixed inside the second piston 42, which corresponds to the connecting port 51 and the injection port 49. A sliding tube 57 is fixed inside the injection tube 56. A connecting tube 61 is slidably fitted inside the sliding tube 57. Multiple sixth springs 58 are fixed between the sliding tube 57 and the connecting tube 61. A second blocking plate 62 is fixed at the bottom of the connecting tube 61. A fourth connecting port 59 is provided on the connecting tube 61. A fifth connecting port 60 is provided on the second blocking plate 62.

[0040] Specifically, during sample injection, the injection tube 26 slides downwards until it is stopped by the conical block 63, at which point the injection tube 26 is pushed upwards, and the plugging ring 53 enters the vaporization chamber 40. The tube body 25 then connects to the vaporization chamber 40 through the first connecting port 28, the second connecting port 29, and the third connecting port 54. The higher gas pressure at this point allows the sample in the tube body 25 to be delivered into the vaporization chamber 40. The position of the first piston 37 remains fixed, ensuring good sample injection. Meanwhile, the second piston 42 slides downwards, compressing the third telescopic rod 45. If the sample is liquid, the first heating tube 41 and the second heating tube 44 can be energized, causing them to heat and vaporize the sample. As the second piston 42 moves downwards, it drives the injection tube 56 downwards, inserting it into the injection port 49 until the injection tube 56 is stopped by the first connecting port 63. The length of the three telescopic rods 45 is limited, and the carrier gas is introduced into the vaporization chamber 40. Then, the larger air pressure pushes the second blocking plate 62 downward. At this time, the position of the second blocking plate 62 is fixed by the third electromagnet 50, so that it can be blown out from the fourth connecting port 59 and the fifth connecting port 60. At this time, the air pressure decreases, the third telescopic rods 45 rebound and drive the second piston 42 to reset, so that the sliding tube 57 slides relative to the connecting tube 61. The sixth spring 58 is compressed, thus ensuring normal gas output. After the gas output is completed, the third electromagnet 50 no longer fixes the second blocking plate 62, so the sixth spring 58 can drive the connecting tube 61 to reset. An elastic sealing gasket can also be installed in the sample inlet 49. When the sample inlet tube 56 is inserted, the elastic sealing gasket seals the periphery of the sample inlet tube 56. When the sample inlet tube 56 slides out, the elastic sealing gasket seals the periphery of the connecting tube 61, thus ensuring the sample injection effect.

[0041] Workflow: Starting motor 3 causes the first rotating shaft 4 to rotate, which in turn drives the first gear 5 to rotate. The first gear 5 meshes with the second gear 7, causing the rotating plate 12 to rotate. This, in turn, drives the sample delivery tube 24 on the rotating plate 12 to rotate, allowing for position adjustment of the sample delivery tube 24. When sample injection or extraction is required through the sample delivery tube 24, the electric cylinder 11 is activated, causing the rotating plate 12 to move up and down. This, in turn, causes the rotating frame 8 to slide up and down along the sliding rod 9. The cross-shaped structure of the sliding rod 9 ensures that the first rotating shaft 4 can drive the rotating frame 8 to rotate. The sample delivery tube 24 moves spirally, allowing it to slide up and down while rotating. The first piston 37 is attracted and fixed to the bottom of the tube body 25 by the first electromagnet 38. When sampling, the first electromagnet 38 is de-energized, causing the third spring 33 to return and push the first piston 37 upwards, allowing for extraction. When injecting the sample, the push rod 39 passes through the through hole 22 and pushes the first piston 37 downwards, increasing the pressure inside the tube body 25. When the injection tube 26 moves upwards, this increased pressure can then push the tube body 25... When the sample is injected, the injection tube 26 slides downwards until it is stopped by the conical block 63. At this point, the injection tube 26 is pushed upwards, and the plugging ring 53 enters the vaporization chamber 40. The tube body 25 then connects to the vaporization chamber 40 through the first connecting port 28, the second connecting port 29, and the third connecting port 54. The higher gas pressure at this point allows the sample in the tube body 25 to be delivered into the vaporization chamber 40. The position of the first piston 37 remains fixed, ensuring good sample injection. The second piston 42 slides downwards, and the third telescopic rod 45 is compressed. If the sample is liquid, the first piston 37 can be... The heating tube 41 and the second heating tube 44 are energized, causing them to heat and vaporize the sample. As the second piston 42 moves downward, it drives the injection tube 56 to slide downward, inserting it into the injection port 49 until the position of the injection tube 56 is limited by the length of the third telescopic rod 45. The carrier gas is then introduced into the vaporization chamber 40, and the larger gas pressure pushes the second blocking plate 62 downward. At this time, the position of the second blocking plate 62 is fixed by the third electromagnet 50, so that it can be blown out from the fourth connecting port 59 and the fifth connecting port 60, thereby realizing the injection of the sample.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic sample injection mechanism for a gas chromatograph based on mechanical linkage, comprising a base (1) corresponding to the gas chromatograph, characterized in that, A support frame (2) is fixed on the base (1). A rotating structure is installed inside the support frame (2). A driving structure is installed on the support frame (2). The rotating structure corresponds to the driving structure. Multiple injection structures are installed on the rotating structure. A connecting structure is installed between the injection structure and the rotating structure. A height adjustment structure and a reagent bottle (15) are installed on the base (1). The reagent bottle (15) corresponds to the injection structure. The height adjustment structure corresponds to the rotating structure. A vaporization structure is installed inside the base (1). The vaporization structure corresponds to the injection structure. The injection structure includes a sample delivery tube (24). A squeezing structure is installed inside the sample delivery tube (24). The squeezing structure corresponds to the rotating structure. A heating structure and a discharge structure are installed inside the vaporization structure. The discharge structure is connected to the sample delivery tube (24). Correspondingly, the drive structure is equipped with a push structure, which includes a push rod (39). The drive structure includes a motor (3) fixed on the support frame (2). The support frame (2) is rotatably fitted with a first rotating shaft (4) and a second rotating shaft (6). The output end of the motor (3) is fixedly connected to the first rotating shaft (4). A first gear (5) is fixed on the first rotating shaft (4), and a second gear (7) is fixed on the second rotating shaft (6). The first gear (5) meshes with the second gear (7). The rotating structure includes a rotating frame (8). A sliding groove (10) is opened in the rotating frame (8). A sliding rod (9) is fixed on the lower side of the second rotating shaft (6). The sliding rod (9) corresponds to the sliding groove (10). The height adjustment structure includes an electric cylinder (11) fixed on the base (1). A rotating plate (12) is fixed to the output end of the electric cylinder (11). A rotating groove (13) is provided in the rotating frame (8). The rotating groove (13) corresponds to the rotating plate (12). The push rod (39) is rotatably connected to the first rotating shaft (4). The connection structure includes multiple mounting grooves (23) opened at the bottom of the rotating plate (12). The mounting grooves (23) are threadedly engaged with the sample delivery tube (24). A slot (14) is provided in the base (1). The slot (14) corresponds to the reagent bottle (15). A sampling port (20) is opened at the top of the reagent bottle (15). A block (21) is installed in the sampling port (20). A first telescopic rod (16) is fixed between the block (21) and the reagent bottle (15). The first telescopic rod (16) includes a first rod body (17) and a... The second rod (18) is slidably connected to the first rod (17). A first spring (19) is fixed between the first rod (17) and the second rod (18). The sample delivery tube (24) includes a tube body (25). A discharge port (27) is opened at the bottom of the tube body (25). An injection tube (26) is slidably fitted inside the discharge port (27). A first blocking plate (30) is fixed at the top of the injection tube (26). A first connecting port (28) and a second connecting port (29) are opened inside the injection tube (26). The first connecting port (28) corresponds to the tube body (25) and the discharge port (27). A limiting plate (31) is fixed on the injection tube (26). Multiple second springs (32) are fixed between the limiting plate (31) and the tube body (25).

2. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 1, characterized in that: The extrusion structure includes a first piston (37) that slides within the tube (25). A second telescopic rod (34) and multiple third springs (33) are fixed between the first piston (37) and the tube (25). The second telescopic rod (34) includes a third rod body (35) and a fourth rod body (36). The third rod body (35) is a hollow structure. The third rod body (35) and the fourth rod body (36) are slidably connected. Multiple through holes (22) are provided inside the rotating frame (8). The through holes (22) correspond to the push rod (39). The through holes (22) are connected to the third rod body (35). The push rod (39) corresponds to the third rod body (35). A first electromagnet (38) is fixed inside the first piston (37). The first electromagnet (38) corresponds to the tube (25).

3. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 1, characterized in that: The vaporization structure includes a vaporization chamber (40) opened in the base (1), and the discharge structure includes a second piston (42) that is slidably fitted in the vaporization chamber (40). A second electromagnet (43) is fixed in the second piston (42), and the second electromagnet (43) corresponds to the cavity wall of the vaporization chamber (40).

4. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 3, characterized in that: The heating structure includes a first heating tube (41) fixed inside the second piston (42) and a plurality of second heating tubes (44) fixed inside the base (1). The second heating tubes (44) are located on the periphery of the vaporization chamber (40). A plurality of third telescopic rods (45) are fixed between the second piston (42) and the bottom of the vaporization chamber (40).

5. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 4, characterized in that: The third telescopic rod (45) includes a fifth rod body (46) and a sixth rod body (47). The fifth rod body (46) and the sixth rod body (47) are slidably connected. Multiple fourth springs (48) are fixed between the fifth rod body (46) and the sixth rod body (47). An inlet (49) is provided at the bottom of the vaporization chamber (40). The inlet (49) is connected to the inlet end of the gas chromatograph. Multiple third electromagnets (50) are fixed in the base (1). The third electromagnets (50) are located on the periphery of the inlet (49).

6. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 5, characterized in that: The base (1) has a connecting port (51) which corresponds to the injection tube (26). A plugging ring (53) is installed in the connecting port (51). Multiple fifth springs (52) are fixed between the plugging ring (53) and the base (1). A conical block (63) is fixed at the bottom of the plugging ring (53). Multiple third connecting ports (54) are opened on the periphery of the plugging ring (53). A limiting rod (55) is fixed in the connecting port (51). The limiting rod (55) corresponds to the third connecting port (54). A sample injection tube (56) is fixed in the second piston (42). The sample injection tube (56) corresponds to the connecting port (51) and the sample injection port (49).

7. The automatic sample introduction mechanism for a gas chromatograph based on mechanical linkage according to claim 6, characterized in that: The sample inlet tube (56) is fixed with a sliding tube (57), and a connecting tube (61) is slidably fitted inside the sliding tube (57). Multiple sixth springs (58) are fixed between the sliding tube (57) and the connecting tube (61). A second blocking plate (62) is fixed at the bottom of the connecting tube (61). A fourth connecting port (59) is opened on the connecting tube (61), and a fifth connecting port (60) is opened on the second blocking plate (62).

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