Gas chromatography sampling device convenient for taking and placing samples

Abstract

The utility model discloses a gas chromatography sampling device convenient to take and place samples, which comprises a chromatograph body, a sampling mechanism is arranged on the upper side of the chromatograph body, a conveying mechanism is arranged on one side of the chromatograph body, the sampling mechanism is matched with the conveying mechanism, and the conveying mechanism comprises a driving mechanism, a conveying shell, a first sample placing plate and a second sample placing plate. The first sample placing plate is slidably mounted on the upper side of the conveying shell, and a transverse sliding plate is slidably mounted at the bottom of the inner wall of the conveying shell. According to the gas chromatography sampling device provided by the utility model, through the arrangement of the conveying mechanism and the sampling mechanism, the sample bottles can be automatically and circularly conveyed to the sampling part through the conveying mechanism in the sampling operation process of the sample, and the sample bottles can be automatically and circularly conveyed to the sampling part through the sampling mechanism; according to the gas chromatography sampling device, a sample in the sample bottle can be automatically sampled and put into the sample inlet, so that the convenience of taking and placing the sample by the gas chromatography sampling device is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography technology, specifically to a gas chromatography injection device that facilitates sample handling. Background Technology

[0002] A chromatograph is a device used for chromatographic separation and analysis. It includes an injection system, a detection system, a recording and data processing system, a temperature control system, and a mobile phase control system. Modern chromatographs are characterized by stability, sensitivity, versatility, and high automation. Depending on the application, chromatographs can be classified into gas chromatographs, liquid chromatographs, and gel permeation chromatography (GPC), etc.

[0003] Gas chromatography is a common type of gas chromatograph. It uses a gas as the mobile phase and separates mixtures based on differences in boiling point, polarity, and adsorption properties. Gas chromatographs are widely used in fields such as medicine and healthcare, environmental monitoring, petrochemicals, and biochemistry.

[0004] Current gas chromatographs require manual sampling of sample vials using a syringe, repeated injection, sampling, and injection multiple times during sample injection. This method is cumbersome, has high repeatability errors, and is time-consuming and labor-intensive. Therefore, there is an urgent need to design a gas chromatograph injection device that facilitates sample handling and injection to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a gas chromatography injection device that facilitates sample handling, thereby addressing the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A gas chromatograph injection device for easy sample handling includes a chromatograph body, an injection mechanism on the upper side of the chromatograph body, and a conveying mechanism on one side of the chromatograph body. The injection mechanism cooperates with the conveying mechanism. The conveying mechanism includes a drive mechanism, a conveying housing, a first sample placement plate, and a second sample placement plate. The first sample placement plate is slidably mounted on the upper side of the conveying housing. A transverse sliding plate is slidably mounted on the bottom of the inner wall of the conveying housing. A vertical sliding plate is slidably mounted on one side of the transverse sliding plate. The second sample placement plate is fixedly mounted on the upper side of the vertical sliding plate. Cam grooves are provided on both sides of the conveying housing. A connecting rod is provided on one side of the vertical sliding plate. Cam followers are provided at both ends of the connecting rod. The cam followers are slidably disposed in the cam grooves. Both the first and second sample placement plates are connected to the drive mechanism.

[0008] The drive mechanism includes a drive motor, pulleys, and a timing belt. There are two pulleys. The drive motor is fixedly installed on one side of the conveying housing. The two pulleys are rotatably installed on one side of the inner wall of the conveying housing. One of the pulleys is fixedly connected to the output end of the drive motor. The timing belt is sleeved around the two pulleys.

[0009] A first clamping plate is fixedly installed on the lower side of the first layout plate, and a second clamping plate is fixedly installed on one side of the transverse sliding plate. The first clamping plate is fixedly connected to the upper side of one end of the timing belt, and the second clamping plate is fixedly connected to the lower side of the other end of the timing belt.

[0010] Both the first and second layout plates have layout cylinders on their lower sides.

[0011] The injection mechanism includes a support frame, a linear motor, a cylinder, and a sampling needle. The support frame is fixedly installed on the upper side of the chromatograph body, the linear motor is fixedly installed on the upper side of the inner wall of the support frame, the cylinder is fixedly installed on the output end of the linear motor, a housing is fixedly installed on the lower side of the cylinder, an electric telescopic rod is fixedly installed on the upper side of the inner wall of the housing, the sampling needle is located on the lower side of the inner wall of the housing, a threaded cap is rotatably installed on the output end of the electric telescopic rod, and a threaded connector is provided on the upper side of the sampling needle, the threaded connector being threadedly connected to the threaded cap.

[0012] A sampling needle is provided on the lower side of the sampling needle tube, and an inlet is provided on the upper side of the chromatograph body. The sampling needle tube and the sampling needle are matched with the inlet.

[0013] In the above technical solution, the gas chromatography injection device provided by this utility model, which facilitates sample handling, has the following advantages:

[0014] (1) The gas chromatography injection device provided by this utility model, through the set conveying mechanism and injection mechanism, can automatically transport the sample bottle to the injection site through the conveying mechanism during the sample injection operation, and can automatically take the sample in the sample bottle and put the sample into the injection port through the injection mechanism, thereby improving the convenience of the gas chromatography injection device in taking and putting samples and reducing the repetition of injection.

[0015] (2) The gas chromatography injection device provided by this utility model can guide the vertical sliding plate and the second sample plate through the cam follower and cam groove, so that they move downwards. When the second sample plate moves towards the first sample plate, the collision between the second sample plate and the first sample plate is avoided, thereby improving the practicality of the conveying mechanism.

[0016] (3) The gas chromatography injection device provided by this utility model can be easily connected to the push rod of the sampling needle tube by setting the threaded connector and threaded cap, so as to realize the electric telescopic rod driving the sampling needle tube to pick up and release samples, thereby improving the practicality of the injection mechanism. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a gas chromatography injection device for easy sample handling according to an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural diagram of the conveying mechanism provided in an embodiment of a gas chromatography injection device for easy sample handling according to the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the housing provided in an embodiment of a gas chromatography injection device for easy sample handling according to the present invention.

[0021] 1. Chromatograph body; 2. Injection mechanism; 3. Conveying mechanism; 4. Injection port; 5. Support frame; 6. Linear motor; 7. Cylinder; 8. Housing; 9. Sampling needle; 10. Electric telescopic rod; 11. Threaded cap; 12. Sampling needle tube; 13. Threaded connector; 14. Drive mechanism; 15. Conveying housing; 16. First sample placement plate; 17. Second sample placement plate; 18. Sample placement cylinder; 19. Drive motor; 20. Pulley; 21. Synchronous belt; 22. First clamping plate; 23. Horizontal sliding plate; 24. Second clamping plate; 25. Vertical sliding plate; 26. Connecting rod; 27. Cam follower; 28. Cam groove. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-3As shown in the figure, the present invention provides a gas chromatography injection device for easy sample handling, comprising a chromatograph body 1, an injection mechanism 2 on the upper side of the chromatograph body 1, and a conveying mechanism 3 on one side of the chromatograph body 1. The injection mechanism 2 cooperates with the conveying mechanism 3. The conveying mechanism 3 includes a drive mechanism 14, a conveying housing 15, a first sample placement plate 16 and a second sample placement plate 17. The first sample placement plate 16 is slidably mounted on the upper side of the conveying housing 15. A horizontal sliding plate 23 is slidably mounted on the bottom of the inner wall of the conveying housing 15. A vertical sliding plate 25 is slidably mounted on one side of the horizontal sliding plate 23. The second sample placement plate 17 is fixedly mounted on the upper side of the vertical sliding plate 25. Cam grooves 28 are provided on both sides of the conveying housing 15. A connecting rod 26 is provided on one side of the vertical sliding plate 25. Cam followers 27 are provided at both ends of the connecting rod 26. The first and second lofting plates 16 and 17 are slidably disposed in the cam groove 28. Both the first lofting plate 16 and the second lofting plate 17 are connected to the drive mechanism 14. The drive mechanism 14 includes a drive motor 19, pulleys 20 and a synchronous belt 21. There are two pulleys 20. The drive motor 19 is fixedly installed on one side of the conveying housing 15. The two pulleys 20 are rotatably installed on one side of the inner wall of the conveying housing 15. One of the pulleys 20 is fixedly connected to the output end of the drive motor 19. The synchronous belt 21 is sleeved around the two pulleys 20. A first clamping plate 22 is fixedly installed on the lower side of the first lofting plate 16. A second clamping plate 24 is fixedly installed on one side of the transverse sliding plate 23. The first clamping plate 22 is fixedly connected to the upper side of one end of the synchronous belt 21. The second clamping plate 24 is fixedly connected to the lower side of the other end of the synchronous belt 21. Lofting cylinders 18 are provided on the lower side of both the first lofting plate 16 and the second lofting plate 17.

[0024] Specifically, in this embodiment, when performing sample injection, the operator places the sample vial containing the sample into the sample placement cylinder 18 on the upper side of the first sample placement plate 16. Then, by starting the drive motor 19, the pulley 20 is rotated. The rotation of the pulley 20 drives the synchronous belt 21 to rotate. The rotation of the synchronous belt 21 causes the first sample placement plate 16 to move backward through the first clamping plate 22. At the same time, the synchronous belt 21 causes the horizontal sliding plate 23 to move forward through the second clamping plate 24. The movement of the horizontal sliding plate 23 causes the vertical sliding plate 25 and the second sample placement plate 17 to move forward. When step 7 moves forward, it drives connecting rod 26 and cam follower 27 to move along cam groove 28. When cam follower 27 moves to the downward tilt position of cam groove 28, it drives vertical sliding plate 25 and second lofting plate 17 to move downward along horizontal sliding plate 23, so that second lofting plate 17 is lower than first lofting plate 16. Then, after the second lofting plate 17 and first lofting plate 16 alternate, when cam follower 27 moves to the upward tilt position of cam groove 28, it drives vertical sliding plate 25 and second lofting plate 17 to move upward along horizontal sliding plate 23. Then, the first lofting plate 16 moves to the sample feeding mechanism. When the sample is moved to the lower side, the second sample plate 17 will move to the other end of the conveying housing 15. Then, the sample injection mechanism 2 will be activated to sample the sample vials on the first sample plate 16. At the same time, the operator will place another sample vial containing a sample into the sample cylinder 18 on the upper side of the second sample plate 17. After the sample injection mechanism 2 has finished sampling the sample vials on the first sample plate 16, the sample injection mechanism 2 will send the sample into the chromatograph body 1. Through the above steps, the second sample plate 17 will be moved to the lower side of the sample injection mechanism 2 for sampling, and the first sample plate 16 will be moved to one end of the conveying housing 15. The staff removes the sample bottle from the first sample plate 16, places a new sample bottle containing the sample on it, and by continuously repeating the above steps, the sample bottle samples can be automatically sampled, injected, sampled again, and injected again, thereby reducing manual operation steps and reducing the error of sample injection repeatability. The first clamping plate 22 and the second clamping plate 24 are both composed of two clamping plates, which are fixed to both sides of the synchronous belt 21 by bolts. The synchronous belt 21 is a toothed synchronous belt, and the first clamping plate 22 and the second clamping plate 24 are provided with toothed grooves on one side that are adapted to the synchronous belt 21.

[0025] This utility model provides a gas chromatography injection device that facilitates sample handling. The injection mechanism 2 includes a support frame 5, a linear motor 6, a cylinder 7, and a sampling needle tube 12. The support frame 5 is fixedly installed on the upper side of the chromatograph body 1. The linear motor 6 is fixedly installed on the upper side of the inner wall of the support frame 5. The cylinder 7 is fixedly installed at the output end of the linear motor 6. A mounting shell 8 is fixedly installed on the lower side of the cylinder 7. An electric telescopic rod 10 is fixedly installed on the upper side of the inner wall of the mounting shell 8. The sampling needle tube 12 is located on the lower side of the inner wall of the mounting shell 8. A threaded cap 11 is rotatably installed at the output end of the electric telescopic rod 10. A threaded connector 13 is provided on the upper side of the sampling needle tube 12, and the threaded connector 13 is threadedly connected to the threaded cap 11. A sampling needle 9 is provided on the lower side of the sampling needle tube 12. An injection port 4 is provided on the upper side of the chromatograph body 1. The sampling needle tube 12 and the sampling needle 9 cooperate with the injection port 4.

[0026] In another embodiment of this utility model, during sampling, a linear motor 6 drives a cylinder 7 and a mounting housing 8 to move to the upper side of the sample bottle, and then starts. The cylinder 7 lowers the mounting housing 8, allowing the sampling needle 9 on the lower side of the mounting housing 8 to insert into the sample bottle. Then, the electric telescopic rod 10 is activated, driving the push rod of the sampling needle tube 12 to move upward, allowing the sampling needle tube 12 to sample the sample from the sample bottle. Then, the cylinder 7 is activated again, driving the mounting housing 8 to rise, allowing the sampling needle 9 to move out of the sample bottle. Then, the linear motor 6 is activated again, driving the cylinder 7 and the mounting housing 8 to move to the upper side of the inlet 4. At this time, the cylinder 7 lowers the mounting housing 8 again to insert the sampling needle 9 into the sample bottle. The sample is inserted into the injection port 4, and then the electric telescopic rod 10 is activated again to drive the push rod of the sampling needle tube 12 to move downward, so that the push rod puts the sample in the sampling needle tube 12 into the injection port 4. The sample then enters the chromatograph body 1 through the injection port 4. The lower end of the sampling needle tube 12 is also provided with a threaded groove. A threaded cylinder is fixedly installed on the lower side of the inner wall of the mounting shell 8. The sampling needle tube 12 is threadedly connected to the threaded cylinder through the threaded groove, thus achieving fixed installation on the lower side of the inner wall of the mounting shell 8. A disassembly port is provided on one side of the mounting shell 8. Through the disassembly port, the user can separate the threaded cap 11 from the threaded connector, and then separate the sampling needle tube 12 from the threaded cylinder, so as to disassemble and replace the sampling needle tube 12.

[0027] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas chromatograph injection device for easy sample handling, comprising a chromatograph body (1), characterized in that, The chromatograph body (1) is provided with an injection mechanism (2) on its upper side and a transport mechanism (3) on one side of the chromatograph body (1). The injection mechanism (2) cooperates with the transport mechanism (3). The transport mechanism (3) includes a drive mechanism (14), a transport housing (15), a first sample release plate (16), and a second sample release plate (17). The first sample release plate (16) is slidably mounted on the upper side of the transport housing (15). A transverse sliding plate (23) is slidably mounted on the bottom of the inner wall of the transport housing (15). A vertical sliding plate (25) is slidably installed on one side, and the second lofting plate (17) is fixedly installed on the upper side of the vertical sliding plate (25). Cam grooves (28) are provided on both sides of the conveying housing (15). A connecting rod (26) is provided on one side of the vertical sliding plate (25). Cam followers (27) are provided at both ends of the connecting rod (26). The cam followers (27) are slidably installed in the cam grooves (28). The first lofting plate (16) and the second lofting plate (17) are both connected to the driving mechanism (14).

2. The gas chromatography injection device for easy sample handling according to claim 1, characterized in that, The drive mechanism (14) includes a drive motor (19), pulleys (20) and a timing belt (21). There are two pulleys (20). The drive motor (19) is fixedly installed on one side of the conveying housing (15). The two pulleys (20) are rotatably installed on one side of the inner wall of the conveying housing (15). One of the pulleys (20) is fixedly connected to the output end of the drive motor (19). The timing belt (21) is sleeved around the two pulleys (20).

3. A gas chromatograph sample introduction device for easy sample handling according to claim 2, characterized in that, A first clamping plate (22) is fixedly installed on the lower side of the first layout plate (16), and a second clamping plate (24) is fixedly installed on one side of the transverse sliding plate (23). The first clamping plate (22) is fixedly connected to the upper side of one end of the synchronous belt (21), and the second clamping plate (24) is fixedly connected to the lower side of the other end of the synchronous belt (21).

4. The gas chromatography injection device for easy sample handling according to claim 1, characterized in that, Both the first laying out plate (16) and the second laying out plate (17) have laying out cylinders (18) on their lower sides.

5. A gas chromatograph sample introduction device for easy sample handling according to claim 1, characterized in that, The injection mechanism (2) includes a support frame (5), a linear motor (6), a cylinder (7), and a sampling needle (12). The support frame (5) is fixedly installed on the upper side of the chromatograph body (1). The linear motor (6) is fixedly installed on the upper side of the inner wall of the support frame (5). The cylinder (7) is fixedly installed at the output end of the linear motor (6). A mounting shell (8) is fixedly installed on the lower side of the cylinder (7). An electric telescopic rod (10) is fixedly installed on the upper side of the inner wall of the mounting shell (8). The sampling needle (12) is located on the lower side of the inner wall of the mounting shell (8). A threaded cap (11) is rotatably installed at the output end of the electric telescopic rod (10). A threaded connector (13) is provided on the upper side of the sampling needle (12). The threaded connector (13) is threadedly connected to the threaded cap (11).

6. A gas chromatograph sample introduction device for easy sample handling according to claim 5, characterized in that, A sampling needle (9) is provided on the lower side of the sampling needle tube (12), and an inlet (4) is provided on the upper side of the chromatograph body (1). The sampling needle tube (12) and the sampling needle (9) are matched with the inlet (4).

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