Gas circuit connecting structure of gas chromatograph and gas chromatograph

Abstract

The utility model provides a gas circuit connecting structure of a gas chromatograph and a gas chromatograph, and belongs to the technical field of gas analysis devices.The gas circuit connecting structure of the gas chromatograph comprises a connecting base and a gas pipe fixing piece; the connecting seat is provided with a plurality of first through holes, one end of each first through hole is communicated with the air pipe, and the other end of each first through hole is communicated with the air hole of the feed-through piece. When the gas circuit connecting structure of the gas chromatography is used, each gas pipe is communicated with the feed-through piece through the connecting seat; in the process of debugging the gas chromatograph, the connecting seat and the feed-through piece are firstly disassembled, and then the connecting seat is connected with the detection equipment, so that each gas pipe can be detected, each gas pipe does not need to be disassembled, and each gas pipe can be directly connected with the feed-through piece through the connecting seat after the detection of the detection equipment is finished; therefore, each gas pipe is connected with the feed-through piece, and the gas pipes do not need to be connected with the feed-through piece one by one, so that the debugging efficiency of the gas chromatograph is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas analysis devices, and in particular to a gas path connection structure of a gas chromatograph and a gas chromatograph. Background Art

[0002] Chromatograph is a device for chromatographic separation and analysis. It includes sampling system, detection system, recording and data processing system, temperature control system and mobile phase control system. Modern chromatographs have the characteristics of stability, sensitivity, versatility and high degree of automation. There are gas chromatographs, liquid chromatographs and gel chromatographs. These chromatographs are widely used in the analysis of certain contents of chemical products and polymer materials. Gel chromatography can also determine the molecular weight and distribution of polymer materials.

[0003] In existing gas chromatographs, multiple gases such as the gas to be tested and the carrier gas enter multiple gas paths through feedthroughs, and then enter the chromatographic column through multiple gas paths. After the gas passes through the chromatographic column, it is finally tested and analyzed. The exhaust gas in the gas chromatograph also needs to be connected to the feedthroughs through multiple gas paths for exhaust. Due to debugging requirements, the gas chromatograph needs to assemble gas paths externally and test the air tightness of each gas path in the gas chromatograph. During testing, it is necessary to disassemble the feedthroughs and each gas path, and then connect the testing equipment to each gas path. Each gas path is tested for air tightness through the testing equipment. After the air tightness test is completed, the connection between each gas path and the testing equipment is disconnected, and then each gas path is connected to the feedthrough to test the air tightness again.

[0004] Since the feedthrough and each gas path need to be repeatedly disconnected and connected during the debugging of the gas chromatograph, the debugging efficiency is low. Utility Model Content

[0005] The present application provides a gas chromatography gas path connection structure and a gas chromatograph, which are used to solve the technical problem of low efficiency in the debugging process of the existing gas chromatograph.

[0006] A first aspect of an embodiment of the present application provides a gas path connection structure of a gas chromatograph, comprising a connection seat and a gas pipe fixing member;

[0007] The connecting seat is provided with a plurality of first through holes penetrating the two end surfaces of the connecting seat, one end of the first through hole is used to be connected with the trachea through the trachea fixing piece, and the end surface of the connecting seat away from the trachea is used to be detachably connected with the feed-through piece, and the other end of each of the first through holes is connected with each of the air holes of the feed-through piece in a one-to-one correspondence.

[0008] In the preferred technical solution of the gas path connection structure of the gas chromatograph, it also includes a seat fixing member;

[0009] An end surface of the connecting seat away from the air pipe is used to abut against an end surface of each sealing member of the feed-through member through the seat body fixing member, and each first through hole is connected to each air hole one by one through the second through hole on each sealing member.

[0010] In the preferred technical solution of the gas path connection structure of the above-mentioned gas chromatography, the seat body fixing part is a screw group, the screw group has a plurality of screws, and a plurality of first screw holes are also provided on the connecting seat, each of the screws passes through each of the first screw holes one by one, and is fixed one by one in each of the second screw holes of the feed-through.

[0011] In the preferred technical solution of the gas path connection structure of the gas chromatograph, the connection seat is a boss having a raised portion and a flange portion, the first through hole is arranged on the raised portion, and the first screw hole is arranged on the flange portion.

[0012] In the preferred technical solution of the gas path connection structure of the gas chromatograph, at least one positioning protrusion matching with the positioning groove on the feed-through is provided on one end surface of the connection seat close to the feed-through.

[0013] In the preferred technical solution of the gas path connection structure of the gas chromatograph, the number of the positioning protrusions is the same as the number of the first through holes, and the first through holes are arranged in a one-to-one correspondence in each positioning protrusion.

[0014] In the preferred technical solution of the gas path connection structure of the gas chromatograph, the protrusion is a cylinder, and the first through holes are arranged in the cylinder at uniform intervals around the circumference.

[0015] In the preferred technical solution of the gas path connection structure of the gas chromatograph, the connection seat is an elastic rubber seat.

[0016] In the preferred technical solution of the gas path connection structure of the gas chromatograph, the air pipe fixing piece is a ferrule joint, which has a connector end and a ferrule end, the connector end is used to communicate with the air pipe, and the ferrule end abuts against the first through hole.

[0017] A second aspect of an embodiment of the present application provides a gas chromatograph, comprising a feedthrough and a plurality of gas pipes, and also comprising the above-mentioned gas chromatograph gas path connection structure, wherein the feedthrough is connected to each of the gas pipes through the gas chromatograph gas path connection structure.

[0018] The present application provides a gas chromatograph gas path connection structure and a gas chromatograph, wherein the gas chromatograph gas path connection structure includes a connecting seat and an air pipe fixing piece; the connecting seat is provided with a plurality of first through holes penetrating two end faces of the connecting seat, one end of the first through hole is used to be connected to the air pipe through the air pipe fixing piece, and the end face of the connecting seat away from the air pipe is used to be detachably connected to the feed-through piece, and the other end of each first through hole is connected to each air hole of the feed-through piece one by one. When using the gas path connection structure of the gas chromatograph of the present application, each gas pipe of the gas chromatograph is set on the connecting seat, and each gas pipe is connected to the feed-through piece through the connecting seat; in the process of debugging the gas chromatograph, the connecting seat and the feed-through piece are first disassembled, and then the connecting seat is connected to the detection equipment, so that each gas pipe can be detected without disassembling each gas pipe. After the detection of the detection equipment is completed, each gas pipe can be directly connected to the feed-through piece through the connecting seat, thereby realizing the connection between each gas pipe and the feed-through piece, and there is no need to connect each gas pipe to the feed-through piece one by one, thereby improving the debugging efficiency of the gas chromatograph and solving the technical problem of low efficiency of the existing gas chromatograph during the debugging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 A schematic diagram of the gas path connection structure of a gas chromatograph provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0022] Figure 3 A schematic diagram of the structure of a connection seat in a gas path connection structure of a gas chromatograph provided in an embodiment of the present application;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure from another angle;

[0024] Figure 5 A schematic diagram of the structure of a feed-through provided in an embodiment of the present application;

[0025] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0026] Figure 7 Another structural schematic diagram of the gas path connection structure of the gas chromatograph provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100-connecting seat; 110-protruding portion; 120-flange portion;

[0029] 200-tracheal fixings;

[0030] 300-seat fixing part;

[0031] 400-first through hole;

[0032] 500-trachea;

[0033] 600-Feedthrough;

[0034] 700-stomach;

[0035] 800-seal;

[0036] 900-second through hole;

[0037] 1000-positioning groove;

[0038] 1100-positioning protrusion;

[0039] 1200-first screw hole;

[0040] 1300-second screw hole;

[0041] 1400-Screw head retreat groove.

[0042] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0044] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] As described in the background technology, in the existing gas chromatograph, multiple gases such as the test gas and the carrier gas enter into multiple gas paths through the feedthrough, and then enter into the chromatographic column through multiple gas paths. After the gas passes through the chromatographic column, it is finally detected and analyzed. Due to the debugging requirements, the gas chromatograph needs to assemble the gas paths externally and detect the air tightness of each gas path. During the detection, it is necessary to disassemble the feedthrough and each gas path, and then connect the detection equipment with each gas path. Each gas path is tested for air tightness through the detection equipment. After the air tightness test is completed, the connection between each gas path and the detection equipment is disassembled, and then each gas path is connected to the feedthrough to test the air tightness again.

[0048] Since the feedthrough and each gas path need to be repeatedly disconnected and connected during the debugging of the gas chromatograph, the debugging efficiency is low.

[0049] In order to solve the technical problem of low efficiency of existing gas chromatographs during the debugging process, the present application proposes a gas path connection structure of a gas chromatograph and a gas chromatograph, wherein the gas path connection structure of the gas chromatograph includes a connecting seat and an air pipe fixing piece; the connecting seat is provided with a plurality of first through holes penetrating the two end faces of the connecting seat, one end of the first through hole is used to connect with the air pipe through the air pipe fixing piece, and the end face of the connecting seat away from the air pipe is used for detachable connection with the feed-through piece, and the other end of each first through hole is connected with each air hole of the feed-through piece in a one-to-one correspondence.

[0050] When using the gas path connection structure of the gas chromatograph of the present application, each gas pipe of the gas chromatograph is set on the connecting seat, and each gas pipe is connected to the feed-through piece through the connecting seat; in the process of debugging the gas chromatograph, the connecting seat and the feed-through piece are first disassembled, and then the connecting seat is connected to the detection equipment, so that each gas pipe can be detected without disassembling each gas pipe. After the detection of the detection equipment is completed, each gas pipe can be directly connected to the feed-through piece through the connecting seat, thereby realizing the connection between each gas pipe and the feed-through piece, and there is no need to connect each gas pipe to the feed-through piece one by one, thereby improving the debugging efficiency of the gas chromatograph and solving the technical problem of low efficiency of the existing gas chromatograph during the debugging process.

[0051] The following specific embodiments are combined with the accompanying drawings to describe the technical solution of the application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0052] Reference Figures 1 to 7 As shown, Figure 1 A schematic diagram of the gas path connection structure of a gas chromatograph provided in an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the structure from another angle; Figure 3 A schematic diagram of the structure of a connection seat in a gas path connection structure of a gas chromatograph provided in an embodiment of the present application; Figure 4 for Figure 3 A schematic diagram of the structure from another angle; Figure 5 A schematic diagram of the structure of a feed-through provided in an embodiment of the present application; Figure 6 for Figure 5 A schematic diagram of the structure from another angle; Figure 7 Another structural schematic diagram of the gas path connection structure of the gas chromatograph provided in an embodiment of the present application.

[0053] In the embodiments of this application, refer to Figures 1 to 3 As shown, a first aspect of an embodiment of the present application provides a gas path connection structure of a gas chromatograph, comprising a connection seat 100 and a gas pipe fixing member 200 .

[0054] The connecting base 100 is provided with a plurality of first through holes 400 penetrating the two end surfaces of the connecting base 100, one end of the first through hole 400 is used to communicate with the trachea 500 through the trachea fixing member 200, and the end surface of the connecting base 100 away from the trachea 500 is used for detachable connection with the feed-through member 600, and the other end of each first through hole 400 is connected one-to-one with each air hole 700 of the feed-through member 600.

[0055] The connecting seat 100 of the gas path connecting structure of the gas chromatograph of the present application has two end faces, and a plurality of first through holes 400 penetrating the two end faces of the connecting seat 100 are provided on the connecting seat 100, and the number of the first through holes 400 is equal to or greater than the number of the air pipes 500. In the present embodiment, the number of the first through holes 400 is equal to the number of the air pipes 500, and one end face of the connecting seat 100 is connected with each air pipe 500. Specifically, one end of the first through hole 400 is connected with the air pipe 500 through the air pipe fixing piece 200, so that the air pipe 500 is fixed at the first through hole 400, and the air pipe 500 is connected with the first through hole 400. The other end face of the connecting seat 100 is detachably connected to the feedthrough 600 through the seat body fixing piece 300, and the end of each first through hole 400 away from the air pipe 500 is connected with each air hole 700 of the feedthrough 600 in a one-to-one correspondence.

[0056] When using the gas path connection structure of the gas chromatograph of the present application, since each gas pipe 500 of the gas chromatograph is arranged on the connecting seat 100, each gas pipe 500 is connected with the first through hole 400 on the connecting seat 100 in a one-to-one correspondence, and then the connecting seat 100 and the feed-through piece 600 are detachably connected, that is, each gas pipe 500 is connected with each gas hole 700 of the feed-through piece 600 through the connecting seat 100; in the process of debugging the gas chromatograph, the connecting seat 100 and the feed-through piece 600 are first separated, and then the connecting seat 100 is connected with the detection equipment, so that each gas pipe 500 can be detected without disassembling each gas pipe 500; After the testing of the testing equipment is completed, the connecting seat 100 is connected to the feed-through piece 600, that is, each air pipe 500 is directly connected to the feed-through piece 600 through the connecting seat 100, thereby realizing the connection between each air pipe 500 and the feed-through piece 600. Compared with the existing gas chromatograph, it is necessary to connect and disassemble each air pipe 500 with the feed-through piece 600 one by one. The gas path connection structure of the gas chromatograph provided in the present application does not need to connect or disassemble each air pipe 500, but only needs to disassemble or connect a connecting seat 100, thereby improving the debugging and installation efficiency of the gas chromatograph and solving the technical problem of low efficiency of the existing gas chromatograph during the debugging process.

[0057] Furthermore, since the existing debugging method requires multiple separate disassembly or installation of each air pipe 500, the leakage probability and leakage risk of the air pipe 500 are increased, and the leakage points are also increased. The gas path connection structure of the gas chromatograph of the present application is only connected and disassembled through the connecting seat 100, which reduces the leakage probability and the increase in leakage risk, and reduces the leakage points.

[0058] In another embodiment, it also includes a seat body fixing part 300; an end surface of the connecting seat 100 away from the air pipe 500 is used to abut against an end surface of each sealing component 800 of the feed-through component 600 through the seat body fixing part 300, and each first through hole 400 is connected to each air hole 700 one by one through the second through hole 900 on each sealing component 800.

[0059] Reference Figure 5 and Figure 7 As shown, a plurality of positioning grooves 1000 are provided on one end face of the feed-through 600 facing the connecting seat 100, and an air hole 700 is provided on the bottom surface of the positioning groove 1000. A sealing member 800 is provided in each positioning groove 1000, and a second through hole 900 is provided on the sealing member 800. One end of the second through hole 900 is connected to the air hole 700, and the other end of the second through hole 900 is connected to the first through hole 400.

[0060] In this embodiment, the connecting seat 100 is connected to the sealing member 800 of the feed-through member 600, thereby improving the sealing of the connection between the first through hole 400 and the air hole 700 of the feed-through member 600, enhancing the sealing effect, and preventing air leakage between the first through hole 400 and the air hole 700 of the feed-through member 600.

[0061] In other embodiments, the seat body fixing member 300 is a screw group having multiple screws, and the connecting seat 100 is also provided with multiple first screw holes 1200. Each screw passes through each first screw hole 1200 one by one and is fixed one by one in each second screw hole 1300 of the feed-through member 600.

[0062] In this embodiment, the seat fixing member 300 is set as a screw group, so as to realize the detachable connection between the feed-through member 600 and the connecting seat 100, and the screw installation and removal are simple and quick, thereby improving the installation and removal efficiency. Since each screw passes through each first screw hole 1200 one by one, and is fixed in each second screw hole 1300 of the feed-through member 600 one by one, the sealing member 800 is squeezed and fixed, and the sealing performance of the connection between the first through hole 400 and the air hole 700 of the feed-through member 600 is further improved, and air leakage between the first through hole 400 and the air hole 700 of the feed-through member 600 is prevented.

[0063] In a certain embodiment, the connection seat 100 is a boss, the boss has a raised portion 110 and a flange portion 120, the first through hole 400 is provided on the raised portion 110, and the first screw hole 1200 is provided on the flange portion 120. In this embodiment, by providing the first screw hole 1200 on the flange portion 120 and the first through hole 400 on the raised portion 110, it is possible to prevent the first screw hole 1200 from interfering with the first through hole 400, avoid squeezing the air pipe 500 in the first through hole 400 when installing a screw in the first screw hole 1200, and prevent the air pipe 500 from being displaced or deformed.

[0064] In other possible embodiments, at least one positioning protrusion 1100 matching with the positioning groove 1000 on the feed-through 600 is disposed on an end surface of the connection socket 100 close to the feed-through 600 .

[0065] In this embodiment, by setting the positioning protrusion 1100 in the positioning groove 1000, the feed-through 600 and the connecting seat 100 can be quickly positioned, thereby facilitating the installation and disassembly of the seat body fixing member 300, and preventing misalignment between the feed-through 600 and the connecting seat 100, thereby improving the sealing effect.

[0066] In a possible embodiment, the number of the positioning protrusions 1100 is the same as the number of the first through holes 400, and each first through hole 400 is disposed in each positioning protrusion 1100 in a one-to-one correspondence. In this embodiment, each first through hole 400 corresponds to a positioning protrusion 1100, because the positioning protrusion 1100 corresponds to the positioning groove 1000, and the first through hole 400 and the second through hole 900 also correspond to each other, that is, the second through hole 900 is disposed in the positioning groove 1000, so that the corresponding connection between the first through hole 400 and the second through hole 900 is more stable, and the first through hole 400 and the second through hole 900 are prevented from being offset when connected, resulting in the phenomenon of inaccurate docking.

[0067] In another possible embodiment, the protrusion 110 is a cylinder, and the first through holes 400 are arranged in the cylinder at uniform intervals around the circumference. In this embodiment, the protrusion 110 is arranged in a cylindrical shape, so that the volume of the protrusion 110 is reduced, and at the same time, the first through holes 400 are arranged in the cylinder at uniform intervals around the circumference, so that the first through holes 400 are evenly stressed.

[0068] In other possible embodiments, the connection base 100 is an elastic rubber base. In this embodiment, the connection base 100 is configured as an elastic rubber base, thereby improving the sealing performance of the connection between the connection base 100 and the feed-through 600.

[0069] In a possible embodiment, the trachea fixing member 200 is a ferrule joint, which has a joint end and a ferrule end, the joint end is used to communicate with the trachea 500, and the ferrule end abuts in the first through hole 400. The ferrule joint includes a pipe joint and a ferrule, the trachea 500 passes through the pipe joint and the ferrule in sequence, the pipe joint fixes the trachea 500 at the position of the first through hole 400, the ferrule is arranged in the first through hole 400, the inner wall of the ferrule abuts the trachea 500, and the outer wall of the ferrule abuts the inner wall of the first through hole 400, thereby realizing the connection and fixation of the trachea 500. In this embodiment, by setting the trachea fixing member 200 as a ferrule joint, the trachea 500 can be sealed and connected in the first through hole 400, preventing leakage at the connection between the trachea 500 and the first through hole 400.

[0070] In other embodiments, the outer wall of the protrusion 110 is provided with a plurality of screw head retreat grooves 1400, and at least a portion of the projection of the first screw hole 1200 toward the protrusion 110 is located in the screw head retreat groove 1400. In this embodiment, by providing the screw head retreat grooves 1400, the diameter of the flange portion 120 can be reduced, thereby reducing the diameter of the connecting seat 100, so that the space occupied by the connecting seat 100 is reduced.

[0071] A second aspect of an embodiment of the present application provides a gas chromatograph, comprising a feedthrough 600 and a plurality of gas pipes 500 , and also comprising the above-mentioned gas chromatograph gas path connection structure, wherein the feedthrough 600 is connected to each gas pipe 500 via the gas chromatograph gas path connection structure.

[0072] Since the gas chromatograph of the present application includes the above-mentioned gas chromatograph's gas path connection structure, the gas chromatograph's gas path connection structure includes a connecting seat 100, an air pipe fixing member 200 and a seat body fixing member 300; the connecting seat 100 is provided with a plurality of first through holes 400 penetrating the two end faces of the connecting seat 100, one end of the first through hole 400 is connected to the air pipe 500 through the air pipe fixing member 200, and the end face of the connecting seat 100 away from the air pipe 500 is abutted against one end face of the feed-through member 600 through the seat body fixing member 300, and the other end of each first through hole 400 is connected to each air hole 700 of the feed-through member 600 in a one-to-one correspondence.

[0073] When using the gas chromatograph of the present application, each gas pipe 500 of the gas chromatograph is set on the connecting seat 100, and each gas pipe 500 is connected with the feed-through piece 600 through the connecting seat 100; in the process of debugging the gas chromatograph, the connecting seat 100 and the feed-through piece 600 are first disassembled, and then the connecting seat 100 is connected with the detection equipment, so that each gas pipe 500 can be detected without disassembling each gas pipe 500. After the detection of the detection equipment is completed, each gas pipe 500 can be directly connected to the feed-through piece 600 through the connecting seat 100, thereby realizing the connection between each gas pipe 500 and the feed-through piece 600, and there is no need to connect each gas pipe 500 one by one with the air hole 700 of the feed-through piece 600, thereby improving the debugging efficiency of the gas chromatograph and solving the technical problem of low efficiency of the existing gas chromatograph during the debugging process.

[0074] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0075] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A gas path connection structure for gas chromatography, characterized in that: It comprises a connecting seat (100) and a trachea fixing piece (200); The connection seat (100) is provided with a plurality of first through holes (400) penetrating two end surfaces of the connection seat (100); one end of the first through hole (400) is used to communicate with the trachea (500) through the trachea fixing member (200); an end surface of the connection seat (100) away from the trachea (500) is used to be detachably connected to the feedthrough member (600); and the other end of each of the first through holes (400) is connected to each of the pores (700) of the feedthrough member (600) in a one-to-one correspondence.

2. The gas path connection structure of gas chromatography according to claim 1, characterized in that: Also includes a seat body fixing member (300); An end surface of the connecting seat (100) away from the air pipe (500) is used to abut against an end surface of each sealing member (800) of the feed-through member (600) through the seat body fixing member (300), and each of the first through holes (400) is connected to each of the air holes (700) in a one-to-one correspondence through the second through holes (900) on each of the sealing members (800).

3. The gas path connection structure of gas chromatography according to claim 2, characterized in that: The seat body fixing member (300) is a screw group, which has a plurality of screws. The connecting seat (100) is also provided with a plurality of first screw holes (1200), and each of the screws passes through each of the first screw holes (1200) in a one-to-one manner and is fixed in each of the second screw holes (1300) of the feed-through member (600) in a one-to-one manner.

4. The gas path connection structure of gas chromatography according to claim 3, characterized in that: The connection seat (100) is a boss having a raised portion (110) and a flange portion (120); the first through hole (400) is arranged on the raised portion (110); and the first screw hole (1200) is arranged on the flange portion (120).

5. The gas path connection structure of a gas chromatograph according to any one of claims 2 to 4, characterized in that: At least one positioning protrusion (1100) matching with the positioning groove (1000) on the feed-through piece (600) is provided on an end surface of the connection seat (100) close to the feed-through piece (600).

6. The gas path connection structure of gas chromatography according to claim 5, characterized in that: The number of the positioning protrusions (1100) is the same as the number of the first through holes (400), and each of the first through holes (400) is arranged in a one-to-one correspondence within each of the positioning protrusions (1100).

7. The gas path connection structure of gas chromatography according to claim 4, characterized in that: The raised portion (110) is a cylinder, and the first through holes (400) are arranged in the cylinder at even intervals around the circumference.

8. The gas path connection structure of a gas chromatograph according to any one of claims 2 to 4, characterized in that: The connecting seat (100) is an elastic rubber seat.

9. The gas path connection structure of a gas chromatograph according to any one of claims 1 to 4, characterized in that: The trachea fixing member (200) is a ferrule joint, which has a joint end and a ferrule end, the joint end is used to communicate with the trachea (500), and the ferrule end abuts against the first through hole (400).

10. A gas chromatograph, comprising a feedthrough (600) and a plurality of gas tubes (500), characterized in that: It also comprises the gas path connection structure of the gas chromatograph as claimed in any one of claims 1 to 9, wherein the feed-through (600) is connected to each of the gas pipes (500) via the gas path connection structure of the gas chromatograph.

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