Auxiliary matching structure for gas chromatograph

Abstract

The utility model discloses a kind of auxiliary matching structure for gas chromatograph, it is related to gas chromatograph technical field, including gas chromatograph main body, the top of the gas chromatograph main body is fixedly connected with support plate, the front side of the support plate is equipped with rectangular through-hole, the front side of the support plate is provided with clamping mechanism, the back of the support plate is provided with the lifting mechanism of cooperation with clamping mechanism, and the clamping mechanism includes connecting plate.The utility model cooperates by setting support plate, rectangular through-hole, clamping mechanism and lifting mechanism, solves the gas chromatograph main body in use, usually needs manual operation injection needle to inject sample into sample inlet, in the process of injection, operator needs to keep stable handheld state, make injection needle aim at sample inlet and insert needle head, then, manually press mode pushes needle stem to complete sample injection, the problem that more time and effort is spent in the process of injection, reaches the effect of convenient injection.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography technology, specifically to an auxiliary structure for a gas chromatograph. Background Technology

[0002] Gas chromatography is a precision instrument widely used in the field of analytical chemistry. It separates and analyzes the components in a mixture based on the differences in the partition coefficients of different substances between the stationary and mobile phases. After the sample is vaporized, it enters the chromatographic column with the carrier gas. Due to the different interactions with the stationary phase, the residence time of each component in the column varies. They then flow out of the column in sequence and are detected by the detector, thereby obtaining information about the composition and content of the sample. It has the advantages of high separation efficiency, fast analysis speed, and high sensitivity, and is widely used in quality control and component analysis in many industries such as chemical, environmental, and food industries.

[0003] The problem with existing technology is that when using the existing gas chromatograph, it is usually necessary to manually operate the injection needle to inject the sample into the injection port. During the injection process, the operator needs to keep the needle steady, align the injection needle with the injection port and insert the needle, and then manually press the needle bar to complete the sample injection. The injection process is time-consuming and laborious. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide an auxiliary structure for a gas chromatograph that has the advantage of automatic sample placement. This solves the problem that existing gas chromatographs typically require manual operation of the injection needle to inject the sample into the injection port. During the injection process, the operator needs to maintain a stable hand position to align the injection needle with the injection port and insert the needle. Then, the needle rod needs to be manually pressed to complete the sample injection, which is time-consuming and laborious.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary structure for a gas chromatograph, comprising a gas chromatograph body, a support plate fixedly connected to the top of the gas chromatograph body, a rectangular through hole on the front side of the support plate, a clamping mechanism on the front side of the support plate, and a lifting mechanism cooperating with the clamping mechanism on the rear side of the support plate.

[0006] The clamping mechanism includes a connecting plate. Positioning blocks are fixedly connected to the top and bottom of the front side of the connecting plate. Clamping components are provided on the left and right sides of the opposite side of the two positioning blocks, and the clamping components are symmetrically arranged. T-shaped grooves that cooperate with the clamping components are opened at the top and bottom of the middle of the front side of the connecting plate.

[0007] The lifting mechanism includes a pressing component and a driving component, wherein the pressing component is disposed in the inner cavity of the rectangular through hole.

[0008] As a preferred embodiment of the present invention, the clamping assembly includes a clamping plate, with V-shaped clamping blocks fixedly connected to the top and bottom of the right side of the clamping plate, and a pushing plate fixedly connected to the left side of the clamping plate.

[0009] As a preferred embodiment of this utility model, T-shaped blocks are fixedly connected to the top and bottom of the rear side of the clamping plate. The side of the T-shaped block near the T-shaped groove passes through the T-shaped groove and extends into the inner cavity of the T-shaped groove to contact the inner wall of the T-shaped groove. A sponge pad is fixedly connected to the V-shaped opening of the V-shaped clamping block. A push column is rotatably connected to the rear side of the push plate.

[0010] As a preferred embodiment of this utility model, the support plate has stroke grooves on both the left and right sides of its front side, and the rear side of the push column passes through the stroke groove and extends into the inner cavity of the stroke groove to contact the inner wall of the stroke groove.

[0011] In a preferred embodiment of this invention, the pressing component includes a movable plate, the front side of which is fixedly connected to a connecting plate, a limiting post fixedly connected to the top of the movable plate, a limiting block fixedly connected to the top of the limiting post, and a spring sleeved on the bottom of the surface of the limiting post.

[0012] In a preferred embodiment of this invention, the drive assembly includes a servo motor, a screw, and a lifting plate. The bottom of the servo motor is fixedly connected to a support plate, the bottom of the screw is fixedly connected to the output end of the servo motor, the rear side of the lifting plate is sleeved on the surface of the screw and threadedly connected to the screw, the middle of the lifting plate is sleeved on the top of the surface of the limiting post, the top and bottom of the spring are fixedly connected to the lifting plate and the moving plate, respectively, and a pressing block is fixedly connected to the front side of the bottom of the lifting plate.

[0013] As a preferred embodiment of this utility model, the left and right sides of the inner wall of the rectangular through hole are provided with sliding grooves, and the left and right sides of the movable plate are fixedly connected with sliders. The side of the slider away from the movable plate passes through the sliding groove and extends into the inner cavity of the sliding groove to contact the inner wall of the sliding groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model solves the problem that existing gas chromatographs typically require manual operation of the injection needle to inject samples into the injection port. During the injection process, the operator needs to maintain a stable hand position to align the injection needle with the injection port and insert the needle. Then, the needle rod is manually pressed to complete the sample injection, which is time-consuming and laborious. This invention achieves the effect of convenient sample injection.

[0016] 2. This utility model, by setting a clamping mechanism, can clamp and fix the injection needle, aligning the needle tip with the injection port, making it convenient for the needle tip to be inserted into the inner cavity of the injection port of the gas chromatograph.

[0017] 3. This utility model, by setting up a lifting mechanism, can lift the injection needle, so that the injection needle can be inserted into the inner cavity of the injection port of the gas chromatograph and automatically injected, which facilitates sample injection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the driver component structure;

[0020] Figure 3 This is a schematic diagram of the support plate and rectangular through-hole structure;

[0021] Figure 4 This is a schematic diagram of the downward pressure component structure;

[0022] Figure 5 This is a schematic diagram of the clamping component structure.

[0023] In the diagram: 1. Gas chromatograph body; 2. Support plate; 3. Rectangular through hole; 4. Clamping mechanism; 5. Lifting mechanism; 6. Stroke groove; 7. Slide groove; 8. Slider; 41. Connecting plate; 42. Positioning block; 43. Clamping assembly; 44. T-slot; 51. Pressing assembly; 52. Drive assembly; 431. Clamping plate; 432. V-shaped clamping block; 433. Pushing plate; 434. T-block; 435. Sponge pad; 436. Pushing column; 511. Moving plate; 512. Limiting column; 513. Limiting block; 514. Spring; 521. Servo motor; 522. Screw; 523. Lifting plate; 524. Pressing block. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] Example 1

[0029] Reference Figure 1-5 This is the first embodiment of the present invention, providing an auxiliary structure for a gas chromatograph, including a gas chromatograph body 1, a support plate 2 fixedly connected to the top of the gas chromatograph body 1, a rectangular through hole 3 on the front side of the support plate 2, a clamping mechanism 4 on the front side of the support plate 2, and a lifting mechanism 5 cooperating with the clamping mechanism 4 on the rear side of the support plate 2.

[0030] The clamping mechanism 4 includes a connecting plate 41. Positioning blocks 42 are fixedly connected to the top and bottom of the front side of the connecting plate 41. Clamping components 43 are provided on the left and right sides of the opposite side of the two positioning blocks 42. The clamping components 43 are symmetrically arranged. T-shaped grooves 44 that cooperate with the clamping components 43 are provided on the top and bottom of the middle of the front side of the connecting plate 41.

[0031] The lifting mechanism 5 includes a pressing component 51 and a driving component 52. The pressing component 51 is disposed in the inner cavity of the rectangular through hole 3.

[0032] Specifically, by using the support plate 2, rectangular through hole 3, clamping mechanism 4 and lifting mechanism 5 in combination, the effect of convenient sample injection is achieved.

[0033] Furthermore, the injection needle is placed in the inner cavity of the positioning block 42. Then, the drive assembly 52 is activated to move downward, and the pressing assembly 51 is driven to move downward simultaneously. During the downward movement of the pressing assembly 51, the two clamping assemblies 43 will move closer to each other, clamping the injection needle and driving it downward, so that the injection needle is automatically inserted into the inner cavity of the gas chromatograph body 1 inlet. After the injection needle is inserted, the downward moving assembly stops moving downward. At this time, the drive assembly 52 will continue to move downward a certain distance and push the needle shaft of the injection needle downward, so that the sample in the inner cavity of the injection needle is injected into the inner cavity of the gas chromatograph body 1 inlet. After the injection is completed, the drive assembly 52 is activated to move upward, and the pressing assembly 51 is driven to move upward simultaneously, so that the needle tip of the injection needle is withdrawn from the inner cavity of the gas chromatograph body 1 inlet. When the pressing assembly 51 reaches the appropriate position, the two clamping assemblies 43 will move away from each other and release the injection needle, making it convenient for the user to remove the injection needle.

[0034] Example 2

[0035] The second embodiment of this utility model provides an auxiliary fitting structure for a gas chromatograph. The clamping assembly 43 includes a clamping plate 431. V-shaped clamping blocks 432 are fixedly connected to the top and bottom of the right side of the clamping plate 431, and a pushing plate 433 is fixedly connected to the left side of the clamping plate 431.

[0036] T-shaped blocks 434 are fixedly connected to the top and bottom of the rear side of the clamping plate 431. The side of the T-shaped block 434 near the T-shaped groove 44 passes through the T-shaped groove 44 and extends into the inner cavity of the T-shaped groove 44 to contact the inner wall of the T-shaped groove 44. A sponge pad 435 is fixedly connected to the V-shaped opening of the V-shaped clamping block 432. A push column 436 is rotatably connected to the rear side of the push plate 433.

[0037] The support plate 2 has stroke grooves 6 on the left and right sides of the front side. The rear side of the push column 436 passes through the stroke groove 6 and extends into the inner cavity of the stroke groove 6 to contact the inner wall of the stroke groove 6.

[0038] Specifically, by setting the clamping plate 431 and V-shaped clamping block 432, the injection needle can be clamped and fixed. By setting the pushing plate 433 and pushing column 436, the clamping plate 431 can be moved to move closer to the injection needle and clamp it. By setting the T-shaped block 434 and T-shaped groove 44, the clamping plate 431 can be limited. By setting the sponge pad 435, the V-shaped clamping block 432 can be prevented from damaging the injection needle. By setting the stroke groove 6, the pushing column 436 can move along the trajectory of the inner cavity of the stroke groove 6 during the downward movement, and drive the two pushing plates 433 to move closer to each other.

[0039] Furthermore, as the push column 436 moves downward within the cavity of the stroke groove 6, it first contacts the inclined surface of the inner wall of the stroke groove 6, generating pressure. This pressure forces the two push columns 436 closer together, causing the push plate 433 to move synchronously. The push plate 433 then drives the clamping plate 431 and the V-shaped clamp 432 to move synchronously, causing the two V-shaped clamps 432 to move closer to the injection needle. When the V-shaped clamps 432 move to the appropriate position, the sponge pad 435 on their inner side... It will contact the injection needle and compress the sponge pad 435, so that the V-shaped clamp 432 will not damage the injection needle when clamping and fixing it. When the push column 436 descends to the appropriate position, it will no longer contact the inclined surface of the inner wall of the stroke groove 6 and enter the straight part of the inner cavity of the stroke groove 6. At this time, the push column 436 will no longer be squeezed, and the two push columns 436 will no longer approach each other. Their distance will remain unchanged, so that the clamping plate 431 and the V-shaped clamp 432 will no longer move, thus clamping and fixing the injection needle.

[0040] Example 3

[0041] The second embodiment of this utility model provides an auxiliary structure for a gas chromatograph. The pressing component 51 includes a movable plate 511. The front side of the movable plate 511 is fixedly connected to the connecting plate 41. A limiting post 512 is fixedly connected to the top of the movable plate 511. A limiting block 513 is fixedly connected to the top of the limiting post 512. A spring 514 is sleeved on the bottom of the surface of the limiting post 512.

[0042] The drive assembly 52 includes a servo motor 521, a screw 522, and a lifting plate 523. The bottom of the servo motor 521 is fixedly connected to the support plate 2. The bottom of the screw 522 is fixedly connected to the output end of the servo motor 521. The rear side of the lifting plate 523 is sleeved on the surface of the screw 522 and threadedly connected to the screw 522. The middle of the lifting plate 523 is sleeved on the top of the surface of the limiting post 512. The top and bottom of the spring 514 are fixedly connected to the lifting plate 523 and the moving plate 511, respectively. A pressing block 524 is fixedly connected to the front side of the bottom of the lifting plate 523.

[0043] The rectangular through hole 3 has grooves 7 on both the left and right sides of its inner wall. The movable plate 511 has sliders 8 fixedly connected to both the left and right sides of its left and right sides. The side of the slider 8 away from the movable plate 511 passes through the groove 7 and extends into the inner cavity of the groove 7 to contact the inner wall of the groove 7.

[0044] Specifically, by setting the movable plate 511, the clamping assembly 43 can be raised and lowered as a whole through the connecting plate 41 during the lifting process. By setting the limiting post 512 and the limiting block 513, the spring 514 and the lifting plate 523 can be limited. By setting the spring 514, the lifting plate 523 can drive the movable plate 511 to rise and fall through the spring 514. After the movable plate 511 descends to the appropriate position, it will stop moving. The lifting plate 523 can compress the spring 514, so that the lowering block 524 can continue to move down a certain distance to press down the needle rod of the injection needle, so that the sample in the inner cavity of the injection needle is injected into the inner cavity of the gas chromatograph injection port.

[0045] By setting a servo motor 521, the screw 522 can be driven to rotate, and the screw 522 can drive the lifting plate 523 to rise and fall. By setting the lifting plate 523, the moving plate 511 and the pressing block 524 can be moved synchronously during the lifting process. By setting the pressing block 524, the needle rod of the injection needle can be pressed down, thereby injecting the sample in the inner cavity of the injection needle into the inner cavity of the gas chromatograph injection port. By setting the slider 8 and the groove 7, the moving plate 511 can be limited.

[0046] Furthermore, the servo motor 521 is activated, driving the screw 522 to rotate. During the rotation of the screw 522, through its threaded connection with the lifting plate 523, the rotational motion of the screw 522 is converted into the vertical linear motion of the lifting plate 523, causing the lifting plate 523 to move downward. The lowering block 524 moves synchronously with the lifting plate 523. Simultaneously, during the downward movement of the lifting plate 523, the spring 514 drives the moving plate 511 to move downward. The sliders 8 on both sides of the moving plate 511 move synchronously with the moving plate 511 within the inner cavity of the slide groove 7, limiting the movement of the moving plate 511 and ensuring its stability. The moving plate 511 moves vertically and linearly downwards, which in turn drives the clamping assembly 43 to move downwards via the connecting plate 41, allowing the injection needle to be inserted into the cavity of the gas chromatograph inlet. When the moving plate 511 reaches the appropriate position, it will contact the bottom of the inner wall of the rectangular through hole 3 and stop moving. Meanwhile, the lifting plate 523 will continue to move downwards and compress the spring 514. The lifting plate 523 will drive the lowering block 524 to move downwards for a certain distance, so that after the injection needle is inserted into the gas chromatograph inlet, the lowering block 524 can push the needle shaft of the injection needle to inject the sample from the inner cavity of the injection needle into the cavity of the gas chromatograph inlet.

[0047] Working principle:

[0048] In use, the operator pinches the injection needle and places it at the opening of the positioning block 42 for initial positioning. Then, the servo motor 521 is started to rotate forward, driving the screw 522 to rotate. During the rotation of the screw 522, through the threaded connection with the lifting plate 523, the rotational motion of the screw 522 is converted into the vertical linear motion of the lifting plate 523, causing the lifting plate 523 to move downward. The pressing block 524 moves synchronously with the lifting plate 523. At the same time, during the downward movement of the lifting plate 523, the spring 514 drives the moving plate 511 to move downward. The sliders 8 on both sides of the moving plate 511 move synchronously with the moving plate 511 in the inner cavity of the slide groove 7, limiting the moving plate 511 and keeping it in vertical linear motion. During the downward movement of the moving plate 511, the clamping assembly 43 moves downward as a whole through the connecting plate 41.

[0049] Simultaneously, as the clamping assembly 43 moves downward, its pushing column 436 moves downward within the cavity of the travel groove 6. During this downward movement, the pushing column 436 first contacts the inclined surface of the inner wall of the travel groove 6, generating pressure. This pressure forces the two pushing columns 436 closer together, causing the pushing plate 433 to move synchronously. The pushing plate 433 then drives the clamping plate 431 and the V-shaped clamping block 432 to move synchronously, causing the two V-shaped clamping blocks 432 to move closer to the injection needle. When the V-shaped clamping block 432 moves to the appropriate position, its inner sponge pad 435 will... The injection needle makes contact and compresses the sponge pad 435, so that the V-shaped clamp 432 avoids damaging the injection needle when clamping and fixing it. When the push column 436 descends to the appropriate position, it will no longer contact the inclined surface of the inner wall of the stroke groove 6 and enter the straight part of the inner cavity of the stroke groove 6. At this time, the push column 436 is no longer squeezed, and the two push columns 436 no longer approach each other. Their distance remains unchanged, so that the clamping plate 431 and the V-shaped clamp 432 no longer move, clamping and fixing the injection needle, so that the injection needle moves down synchronously with the V-shaped clamp 432 and is inserted into the inner cavity of the gas chromatograph injection port.

[0050] Once the moving plate 511 reaches the appropriate position, it contacts the bottom of the inner wall of the rectangular through hole 3 and stops moving, completing the insertion of the injection needle. The lifting plate 523 continues to move downwards, compressing the spring 514. The lifting plate 523 then drives the lowering block 524 to move downwards a further distance, allowing the injection needle to be inserted into the gas chromatograph inlet. The lowering block 524 then pushes the injection needle shaft, injecting the sample from the injection needle's inner cavity into the gas chromatograph inlet's inner cavity. After sample injection is complete, the servo motor 521 is activated to reverse, causing the lifting plate 511 to move downwards. The lowering plate 523 moves upward, and the moving plate 511 moves upward synchronously through the spring 514. The moving plate 511 moves the clamping assembly 43 upward synchronously, so that the needle tip of the injection needle is pulled out from the inner cavity of the injection port of the gas chromatograph body 1. When the clamping assembly 43 moves upward to the appropriate position, its pushing column 436 will move away from each other, and the pushing plate 433 will move the clamping plate 431 synchronously, so that the two V-shaped clamps 432 move away from each other and release the injection needle. At this time, the operator can take out the injection needle and complete the injection.

[0051] In summary, by using the support plate 2, rectangular through hole 3, clamping mechanism 4 and lifting mechanism 5 in combination, the effect of convenient sample injection is achieved.

[0052] It should be noted that the servo motor, screw, and spring are all existing devices or equipment, or devices or equipment that can be implemented with existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters, are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0053] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0054] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0055] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An auxiliary structure for a gas chromatograph, comprising a gas chromatograph body (1), characterized in that: A support plate (2) is fixedly connected to the top of the gas chromatograph body (1). A rectangular through hole (3) is provided on the front side of the support plate (2). A clamping mechanism (4) is provided on the front side of the support plate (2). A lifting mechanism (5) that works in conjunction with the clamping mechanism (4) is provided on the rear side of the support plate (2). The clamping mechanism (4) includes a connecting plate (41). Positioning blocks (42) are fixedly connected to the top and bottom of the front side of the connecting plate (41). Clamping components (43) are provided on the left and right sides of the opposite side of the two positioning blocks (42), and the clamping components (43) are symmetrically arranged. T-shaped grooves (44) that cooperate with the clamping components (43) are opened at the top and bottom of the middle of the front side of the connecting plate (41). The lifting mechanism (5) includes a pressing component (51) and a driving component (52), wherein the pressing component (51) is disposed in the inner cavity of the rectangular through hole (3).

2. The auxiliary fitting structure for a gas chromatograph according to claim 1, characterized in that: The clamping assembly (43) includes a clamping plate (431), with V-shaped clamping blocks (432) fixedly connected to the top and bottom of the right side of the clamping plate (431), and a push plate (433) fixedly connected to the left side of the clamping plate (431).

3. The auxiliary fitting structure for a gas chromatograph according to claim 2, characterized in that: T-shaped blocks (434) are fixedly connected to the top and bottom of the rear side of the clamping plate (431). The side of the T-shaped block (434) near the T-shaped groove (44) passes through the T-shaped groove (44) and extends to the inner cavity of the T-shaped groove (44) to contact the inner wall of the T-shaped groove (44). A sponge pad (435) is fixedly connected to the V-shaped opening of the V-shaped clamping block (432). A push column (436) is rotatably connected to the rear side of the push plate (433).

4. The auxiliary fitting structure for a gas chromatograph according to claim 3, characterized in that: The support plate (2) has stroke grooves (6) on its left and right sides. The rear side of the push column (436) passes through the stroke groove (6) and extends into the inner cavity of the stroke groove (6) to contact the inner wall of the stroke groove (6).

5. The auxiliary fitting structure for a gas chromatograph according to claim 1, characterized in that: The pressing assembly (51) includes a movable plate (511), the front side of which is fixedly connected to the connecting plate (41), a limiting post (512) is fixedly connected to the top of the movable plate (511), a limiting block (513) is fixedly connected to the top of the limiting post (512), and a spring (514) is sleeved on the bottom of the surface of the limiting post (512).

6. The auxiliary fitting structure for a gas chromatograph according to claim 5, characterized in that: The drive assembly (52) includes a servo motor (521), a screw (522), and a lifting plate (523). The bottom of the servo motor (521) is fixedly connected to the support plate (2). The bottom of the screw (522) is fixedly connected to the output end of the servo motor (521). The rear side of the lifting plate (523) is sleeved on the surface of the screw (522) and threadedly connected to the screw (522). The middle of the lifting plate (523) is sleeved on the top of the surface of the limiting post (512). The top and bottom of the spring (514) are fixedly connected to the lifting plate (523) and the moving plate (511) respectively. A pressing block (524) is fixedly connected to the front side of the bottom of the lifting plate (523).

7. The auxiliary fitting structure for a gas chromatograph according to claim 6, characterized in that: The rectangular through hole (3) has a sliding groove (7) on the left and right sides of its inner wall. The movable plate (511) has a slider (8) fixedly connected to its left and right sides. The slider (8) passes through the sliding groove (7) on the side away from the movable plate (511) and extends into the inner cavity of the sliding groove (7) to contact the inner wall of the sliding groove (7).

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