A high efficiency sample splitting device for a gas chromatograph

Abstract

The utility model discloses a high -efficient sample shunt device for gas chromatograph specifically related to gas chromatograph sample shunt field, including vaporization subassembly, vaporization subassembly upper side swing joint has connecting assembly, vaporization subassembly inner surface swing joint has lining assembly, vaporization subassembly downside sliding connection has push assembly, vaporization subassembly includes the shell, the shell inner surface fixedly connected with the baffle, the shell inner surface fixedly connected with the heating wire. The utility model discloses a high -efficient sample shunt device for gas chromatograph, through the vaporization subassembly of design, can carry out vaporization to liquid sample, is convenient for subsequent shunt, and the connecting assembly of design can guarantee the sealing effect of vaporization subassembly, prevents carrier gas leakage and outside air to enter, improves the accuracy of analysis result, through the cap can close and open vaporization subassembly fast, is convenient for opening the cap and checks, cleans or replaces the component etc. operation to the inside of vaporization subassembly.

Description

Technical Field

[0001] This utility model relates to the field of sample splitting in gas chromatographs, and in particular to a high-efficiency sample splitting device for gas chromatographs. Background Technology

[0002] Gas chromatography is a core tool in modern analytical chemistry. It achieves efficient separation by exploiting the differences in sample distribution between the mobile and stationary phases. It is widely used in fields such as environmental monitoring, food safety, and drug development. Its core processes include sample introduction, separation, detection, and data processing. As a key component of the sample introduction system, the sample splitter directly affects the sensitivity, accuracy, and reproducibility of the analysis.

[0003] In existing equipment, when the liner tube needs to be removed after the experiment is completed, it is generally necessary to use tools such as tweezers, wrenches, and special screwdrivers to disassemble the vaporization chamber components, remove the sample inlet cap, and then use a small screwdriver or tweezers to push the liner tube upward from the bottom of the vaporization chamber to remove it completely. The process is cumbersome, inconvenient for replacing the liner tube, and will lead to a reduction in detection and analysis efficiency. Utility Model Content

[0004] The main objective of this invention is to provide a high-efficiency sample splitting device for gas chromatographs, which can effectively solve the problems mentioned above.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-efficiency sample splitting device for a gas chromatograph includes a vaporization component. A connecting component is movably connected to the upper side of the vaporization component, and a liner component is movably connected to the inner surface of the vaporization component. A pushing component is slidably connected to the lower side of the vaporization component. The vaporization component includes a housing, a partition plate is fixedly connected to the inner surface of the housing, a heating wire is fixedly connected to the inner surface of the housing, and a discharge pipe communicating with the inner cavity is fixedly connected to the lower end of the housing. Rectangular grooves are formed on both sides of the upper surface of the inner surface of the housing, and an annular groove is formed on the upper surface of the inner surface of the housing. The lower sides of both rectangular grooves communicate with the inner cavity of the annular groove.

[0007] Preferably, the connecting assembly includes a cap disposed on the upper side of the outer shell, a feed inlet fixedly connected to the middle of the cap, an annular groove II opened on the lower side of the cap, two rectangular blocks fixedly connected to the lower side of the outer surface of the cap, and a plurality of anti-slip strips arranged in a circular array fixedly connected to the upper side of the outer surface of the cap.

[0008] Preferably, the annular groove is adapted to the shape of the partition, and the shapes of the two rectangular blocks and the two rectangular grooves are also adapted.

[0009] Preferably, the lining assembly includes an inner lining tube disposed on the inner surface of the partition, two connecting tubes 1 are fixedly connected to the middle of the inner lining tube, and a connecting tube 2 is fixedly connected to one end of the two connecting tubes 1 that are close to each other. A threaded groove is formed on the inner surface of the connecting tube 2, and a connecting tube 3 is fixedly connected to the lower side of the inner surface of the inner lining tube. A discharge port is formed on the lower side of the connecting tube 3.

[0010] Preferably, the third connecting pipe is a tapered pipe with a large upper diameter and a small lower diameter, and the two first connecting pipes are tapered pipes with a smaller diameter on the side closer to each other and a larger diameter on the side farther away from each other.

[0011] Preferably, the pushing assembly includes a push plate slidably connected to the lower side of the inner surface of the partition. Two slide rods are fixedly connected to the lower end of the push plate. The lower ends of the two slide rods pass through the outer shell and are fixedly connected to a plate. Two springs are fixedly connected to the upper end of the plate and the lower end of the outer shell. The two springs are sleeved on the outer surface of one of the slide rods that are close to each other. A circular hole is opened in the middle of the plate. The inner diameter of the circular hole is larger than the outer diameter of the discharge pipe.

[0012] Preferably, the discharge pipe passes through the push plate and is slidably connected to the push plate, and the discharge pipe is located in the middle of the circular hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This device, through its designed vaporization component, can vaporize liquid samples, facilitating subsequent splitting. The designed connecting components ensure the sealing effect of the vaporization component, preventing carrier gas leakage and the entry of outside air, thus improving the repeatability and accuracy of analytical results. The cap allows for quick sealing and opening of the vaporization component, making sample injection more convenient. At the same time, during instrument maintenance, it is also convenient to open the cap to inspect, clean, or replace parts inside the vaporization component.

[0015] 2. This device, through its designed inner liner assembly, provides a high-temperature, controllable vaporization space for the sample, enabling rapid and uniform vaporization of liquid samples. Simultaneously, the constricted section in the middle of the inner liner tube focuses the sample gas flow, reducing sample diffusion and improving chromatographic separation efficiency. Furthermore, the threaded grooves on the inner surface of the constricted section guide the carrier gas to form a rotating airflow, increasing the contact area between the sample and the inner wall of the inner liner tube, promoting the vaporization of non-volatile components. The designed pushing component allows the inner liner tube to slide within the outer shell, facilitating its removal for cleaning or replacement, thus helping to maintain instrument performance stability and extend its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a partial cross-sectional structural diagram of the vaporization component of this utility model;

[0019] Figure 4 This is a partial cross-sectional structural diagram of the connecting component of this utility model;

[0020] Figure 5 This is a partial cross-sectional structural diagram of the inner lining component of this utility model;

[0021] Figure 6 This is a partial cross-sectional structural diagram of the propulsion component of this utility model.

[0022] In the diagram: 1. Vaporization component; 11. Outer shell; 12. Baffle plate; 13. Heating wire; 14. Discharge pipe; 15. Rectangular groove; 16. Annular groove one; 2. Connecting component; 21. Cap; 22. Inlet; 23. Annular groove two; 24. Rectangular block; 25. Anti-slip strip; 3. Lining component; 31. Lining tube; 32. Connecting tube one; 33. Connecting tube two; 34. Threaded groove; 35. Connecting tube three; 4. Pushing component; 41. Push plate; 42. Slide rod; 43. Plate body; 44. Spring; 45. Round hole. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Example 1, as Figures 1-3 As shown, a high-efficiency sample splitting device for a gas chromatograph includes a vaporization component 1, a connecting component 2 movably connected to the upper side of the vaporization component 1, an inner liner component 3 movably connected to the inner surface of the vaporization component 1, and a pushing component 4 slidably connected to the lower side of the vaporization component 1. The vaporization component 1 includes a housing 11, a partition 12 fixedly connected to the inner surface of the housing 11, a heating wire 13 fixedly connected to the inner surface of the housing 11, and a discharge pipe 14 communicating with the inner cavity fixedly connected to the lower end of the housing 11. Rectangular grooves 15 are formed on both sides of the upper upper surface of the inner surface of the housing 11, and an annular groove 16 is formed on the upper upper surface of the inner surface of the housing 11. The lower sides of the two rectangular grooves 15 are communicating with the inner cavity of the annular groove 16.

[0025] In this embodiment, the annular groove 23 is aligned with the partition 12, and the rectangular block 24 is aligned with the rectangular groove 15. Then, the cap 21 is pressed down onto the upper side of the outer shell 11. The cap 21 is then rotated, causing the rectangular block 24 to rotate in the annular groove 16. After the rectangular block 24 and the rectangular groove 15 are misaligned, the cap 21 can no longer move in the vertical direction, thus fixing the cap 21 to the outer shell 11 and providing a closed vaporization space for the sample.

[0026] like Figure 4 As shown, the connecting component 2 includes a cap 21 located on the upper side of the outer shell 11. A feed inlet 22 is fixedly connected to the middle of the cap 21. An annular groove 23 is opened on the lower side of the cap 21. Two rectangular blocks 24 are fixedly connected to the lower side of the outer surface of the cap 21. Several anti-slip strips 25 arranged in an annular array are fixedly connected to the upper side of the outer surface of the cap 21.

[0027] Specifically, the annular groove 23 is adapted to the shape of the partition 12, and the shapes of the two rectangular blocks 24 and the two rectangular grooves 15 are also adapted.

[0028] like Figure 5 As shown, the inner lining assembly 3 includes an inner lining tube 31 disposed on the inner surface of the partition plate 12. Two connecting tubes 32 are fixedly connected to the middle of the inner lining tube 31. The two connecting tubes 32 are fixedly connected to a connecting tube 33 at their close ends. A threaded groove 34 is provided on the inner surface of the connecting tube 33. A connecting tube 35 is fixedly connected to the lower side of the inner surface of the inner lining tube 31. A discharge port is provided on the lower side of the connecting tube 35.

[0029] Specifically, connecting pipe 35 is a tapered pipe with a large upper diameter and a small lower diameter, and the two connecting pipes 32 are tapered pipes with a smaller diameter on the side closer to each other and a larger diameter on the side farther away from each other.

[0030] The sample is injected into the outer shell 11 through the feed port 22 and enters the inner liner tube 31. Under the high temperature heating of the heating wire 13, the liquid sample vaporizes. When the sample flows through the connecting tube 32, the connecting tube 32 can focus the sample gas flow, gather the sample to the column head of the chromatographic column, reduce sample diffusion, and help improve chromatographic separation efficiency, improve detection sensitivity and resolution.

[0031] The threaded groove 34 can guide the carrier gas to form a rotating airflow. The rotating airflow can increase the contact area between the sample and the inner wall of the inner liner tube 31, promote the vaporization of non-volatile components, and the spiral flow formed by the threaded groove 34 can also reduce eddy current loss.

[0032] The vaporized sample finally flows out through the outlet of connecting pipe 35 and then through the inlet 22. The lower side of the inlet 22 is connected to the distributor.

[0033] The flow divider is existing technology. It adopts a flow divider for gas detectors disclosed in Chinese Patent Publication No. 202320550103.X to efficiently separate samples.

[0034] Example 2: Based on Example 1, this example adds a pushing component 4, which can push the inner liner tube to slide in the outer shell, making it easy to remove from the outer shell. This allows for cleaning or replacement of the inner liner tube, helping to maintain the stability of the instrument's performance and extend its service life.

[0035] like Figure 6 As shown, the pushing component 4 includes a push plate 41 slidably connected to the lower side of the inner surface of the partition 12. Two slide rods 42 are fixedly connected to the lower end of the push plate 41. The lower ends of the two slide rods 42 pass through the outer shell 11 and are fixedly connected to a plate 43. Two springs 44 are fixedly connected to the upper end of the plate 43 and the lower end of the outer shell 11. The two springs 44 are sleeved on the outer surface of one of the slide rods 42 that are close to each other. A round hole 45 is opened in the middle of the plate 43. The inner diameter of the round hole 45 is larger than the outer diameter of the discharge pipe 14.

[0036] Specifically, the discharge pipe 14 passes through the push plate 41 and is slidably connected to the push plate 41, and the discharge pipe 14 is located in the middle of the round hole 45.

[0037] In this embodiment, after the vaporization and diversion of the sample are completed, the heating of the heating wire 13 is stopped. After the device cools down, the cap 21 is rotated and removed from the outer shell 11. Then, the plate 43 is pushed upward, and the plate 43 pushes the slide rod 42 and the push plate 41 to move upward. Then, the push plate 41 pushes the inner liner tube 31 upward. After the inner liner tube 31 is pushed out of the upper opening of the outer shell 11, the inner liner tube 31 can be pulled from the top to remove it from the outer shell 11 for cleaning, maintenance, etc.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency sample splitting device for a gas chromatograph, comprising a vaporization assembly (1), characterized in that: The vaporization component (1) is movably connected to the upper side of the connecting component (2), the inner surface of the vaporization component (1) is movably connected to the inner surface of the vaporization component (1), the lower side of the vaporization component (1) is slidably connected to the pushing component (4), the vaporization component (1) includes a shell (11), the inner surface of the shell (11) is fixedly connected to the partition plate (12), the inner surface of the shell (11) is fixedly connected to the heating wire (13), the lower end of the shell (11) is fixedly connected to the discharge pipe (14) communicating with the inner cavity, the upper sides of the inner surface of the shell (11) are provided with rectangular grooves (15), the upper side of the inner surface of the shell (11) is provided with an annular groove (16), and the lower sides of the two rectangular grooves (15) are communicating with the inner cavity of the annular groove (16).

2. The high-efficiency sample splitting device for a gas chromatograph according to claim 1, characterized in that: The connecting component (2) includes a cap (21) disposed on the upper side of the outer shell (11), a feed inlet (22) is fixedly connected to the middle of the cap (21), an annular groove (23) is opened on the lower side of the cap (21), two rectangular blocks (24) are fixedly connected to the lower side of the outer surface of the cap (21), and a number of anti-slip strips (25) arranged in an annular array are fixedly connected to the upper side of the outer surface of the cap (21).

3. The high-efficiency sample splitting device for a gas chromatograph according to claim 2, characterized in that: The annular groove (23) is adapted to the shape of the partition (12), and the shapes of the two rectangular blocks (24) and the two rectangular grooves (15) are also adapted.

4. The high-efficiency sample splitting device for a gas chromatograph according to claim 1, characterized in that: The inner lining assembly (3) includes an inner lining tube (31) disposed on the inner surface of the partition (12). Two connecting tubes (32) are fixedly connected in the middle of the inner lining tube (31). The two connecting tubes (32) are fixedly connected to a connecting tube (33) at their close ends. A threaded groove (34) is provided on the inner surface of the connecting tube (33). A connecting tube (35) is fixedly connected to the lower side of the inner surface of the inner lining tube (31). A discharge port is provided on the lower side of the connecting tube (35).

5. A high-efficiency sample splitting device for a gas chromatograph according to claim 4, characterized in that: The connecting pipe three (35) is a tapered pipe with a large upper diameter and a small lower diameter, and the two connecting pipes one (32) are tapered pipes with a smaller diameter on the side closer to each other and a larger diameter on the side farther away from each other.

6. The high-efficiency sample splitting device for a gas chromatograph according to claim 1, characterized in that: The pushing assembly (4) includes a push plate (41) slidably connected to the lower side of the inner surface of the partition (12). The lower end of the push plate (41) is fixedly connected to two slide rods (42). The lower ends of the two slide rods (42) penetrate the outer shell (11) and are fixedly connected to a plate (43). The upper end of the plate (43) and the lower end of the outer shell (11) are fixedly connected to two springs (44). The two springs (44) are sleeved on the outer surface of one of the slide rods (42) that are close to each other. A circular hole (45) is opened in the middle of the plate (43). The inner diameter of the circular hole (45) is larger than the outer diameter of the discharge pipe (14).

7. A high-efficiency sample splitting device for a gas chromatograph according to claim 6, characterized in that: The discharge pipe (14) passes through the push plate (41) and is slidably connected to the push plate (41). The discharge pipe (14) is located in the middle of the circular hole (45).

Images