Gas chromatograph with high detection accuracy

Abstract

The utility model belongs to the technical field of detection equipment, and particularly relates to a gas chromatograph with high detection accuracy, which mainly comprises a machine body, a sample introduction mechanism, a storage tray and a feeding mechanism, according to the equipment, through automatic design, accurate transfer of samples from the material storage disc to the sample feeding mechanism is realized, and errors caused by manual operation are avoided; a clamping mechanism in the feeding mechanism adopts the combination of a clamping air cylinder, an L-shaped clamping arm and an anti-skid arc-shaped piece, so that the stability and the safety of the test tubes in the transfer process are ensured; the translation mechanism is matched with the guide piece and the motor, so that accurate positioning of the sample is ensured; the method improves the accuracy and repeatability of gas chromatographic analysis, and is suitable for the field of high-precision chemical analysis.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and particularly relates to a gas chromatograph with high detection accuracy. Background Art

[0002] A gas chromatograph is an instrument commonly used to analyze the components of chemical samples. It separates each component by introducing the sample into a gas chromatography column and separating the components according to their different distribution characteristics in the column, and then the detector detects the corresponding signals to realize the analysis of the sample components. At present, the gas chromatographs on the market often require manual operation during the sample transfer and injection process, which has problems such as complex operation steps and easy generation of human errors, resulting in the accuracy of the detection results being affected.

[0003] Especially in the case of a large amount of samples or continuous detection, frequent manual operations not only increase the workload of the operators, but also may lead to poor repeatability of data due to the instability of the operation, and even problems such as sample loss. These problems have an adverse impact on the accuracy and reliability of the experimental results. Therefore, how to reduce manual operation intervention while ensuring the accurate transmission of samples has become a technical problem to be solved in the field of gas chromatographs. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a gas chromatograph with high detection accuracy, which can achieve that by introducing automation technology, not only the efficiency of laboratory work can be improved, but also the accuracy and consistency of the analysis results can be ensured.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gas chromatograph with high detection accuracy includes a machine body. A sample injection mechanism for inputting a sample to be detected into the machine body and a storage tray for storing the sample to be detected are provided at the top of the machine body. A feeding mechanism is provided at the top of the storage tray, and the feeding mechanism is used to transfer the sample stored on the storage tray into the sample injection mechanism so that the sample injection mechanism can inject the sample into the machine body.

[0007] Further, the feeding mechanism includes a housing, a translation mechanism is arranged inside the housing, the movable end of the translation mechanism is connected with a cylinder, and the telescopic end of the cylinder is connected with a clamping mechanism, and the clamping mechanism is used to clamp the sample test tube stored on the storage tray.

[0008] Further, the clamping mechanism includes a clamping cylinder connected to the telescopic end of the cylinder, clamping arms are arranged mirror-symmetrically at the movable end of the clamping cylinder, and a clamping head is fixedly connected to one end of the clamping arm.

[0009] Further, the clamping arm is L-shaped;

[0010] An arc-shaped member is fixedly connected to the inner side of the clamping head, and an anti-slip rubber strip is pasted on the inner arc surface of the arc-shaped member.

[0011] Further, a connecting seat is fixedly connected to the top of the clamping cylinder, and a connecting block that is engaged with the connecting seat is fixedly connected to the telescopic end of the cylinder.

[0012] Further, the translation mechanism includes a guiding member, a linkage member is movably inserted into the guiding member, and a motor for driving the movement of the linkage member is provided at one end of the linkage member.

[0013] Further, the guiding member includes a supporting member, and guiding tubes are fixedly connected to both ends of the top of the supporting member;

[0014] The linkage member includes a pushing plate, a guiding column is fixedly connected to the side surface of the pushing plate, and the guiding column penetrates through the guiding tube.

[0015] Further, a threaded column is connected to the output end of the motor, and a threaded hole adapted to the threaded column is formed through the side surface of the pushing plate.

[0016] Further, a connecting plate is fixedly connected to one end of the guiding column.

[0017] Further, through holes for fixing it to the movable end of the clamping cylinder are symmetrically formed through the side surface of one end of the clamping arm.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The gas chromatograph with high detection accuracy effectively improves the accuracy of sample transfer and injection through an automated design. First, the automated operations of the injection mechanism and the feeding mechanism avoid manual intervention, reduce errors caused by manual operations, and improve the accuracy and consistency of experimental data. Especially when performing continuous analysis of a large number of samples, the device can ensure that each sample can be accurately transferred and injected, avoiding problems caused by sample loss and operational instability.

[0020] Secondly, the clamping mechanism in the device has precise control and anti-slip design, ensuring the safety of the test tube during transfer. The design of the clamping cylinder enables the clamping mechanism to accurately grasp the test tube, and through the cooperation of the arc-shaped member and the anti-slip rubber strip, the clamping stability is further enhanced. The design of the L-shaped clamping arm provides a greater clamping force, enabling test tubes of different specifications to be firmly clamped, thus avoiding the possible slipping or tilting of the test tube during transfer. This design not only improves the operational safety of the device but also ensures the accuracy of each experiment.

[0021] In addition, the precise control of the translation mechanism enables the sample to be accurately positioned during the transfer process. The combination of the motor and the guide ensures the stable movement of the translation mechanism, avoiding sampling errors caused by inaccurate positions. The cooperation between the linkage and the translation mechanism enables the sample test tube to be quickly and accurately moved to the required position, improving the overall efficiency of the equipment. Through this precise mechanical control, this gas chromatograph can not only meet the requirements of high-precision analysis, but also improve the repeatability and reliability of the experiment. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a schematic structural diagram of the feeding mechanism of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the feeding mechanism of the present utility model after removing the housing;

[0025] Figure 4 is a schematic structural diagram of the translation mechanism of the present utility model;

[0026] Figure 5 is a schematic structural diagram of the cylinder of the present utility model;

[0027] Figure 6 is Figure 5 an enlarged schematic diagram of part A in

[0028] In the drawings, the list of components represented by each reference numeral is as follows:

[0029] 1, body;

[0030] 2, sampling mechanism;

[0031] 3, storage tray;

[0032] 4, feeding mechanism;

[0033] 41, housing;

[0034] 42, translation mechanism;

[0035] 421, motor; 4211, threaded column; 422, guide; 4221, support; 4222, guide tube;

[0036] 423, linkage; 4231, push plate; 4232, threaded hole; 4233, guide post; 4234, connecting plate;

[0037] 43, cylinder; 431, connecting block;

[0038] 44. Clamping mechanism; 441. Clamping cylinder; 442. Connecting seat; 443. Clamping arm; 4431. Clamping head; 4432. Arc-shaped part. Detailed implementation mode

[0039] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation modes of the present utility model, and does not strictly limit the scope of protection specifically claimed by the present utility model.

[0040] Refer to Figures 1-6 , a gas chromatograph with high detection accuracy, including a machine body 1, and a sample injection mechanism 2 for injecting a sample to be detected into the machine body 1 is arranged on the top of the machine body 1; the sample injection mechanism 2 is composed of a sample injection needle, a sample injection port and a control device, and is used for accurately injecting a sample into a chromatographic column; and a storage tray 3 for storing the sample to be detected; the storage tray 3 is a rotating tray with a plurality of grooves, and is used for arranging the sample test tubes to be detected in an orderly manner; a feeding mechanism 4 is arranged on the top of the storage tray 3, and the feeding mechanism 4 is used for transferring the sample stored on the storage tray 3 into the sample injection mechanism 2, so that the sample injection mechanism 2 can inject the sample into the machine body 1.

[0041] Refer to Figures 1-3 , the feeding mechanism 4 includes a housing 41, and a translation mechanism 42 is arranged in the housing 41; the translation mechanism 42 is supported and translated through a guide member 422 to ensure the accuracy of movement; the movable end of the translation mechanism 42 is connected with a cylinder 43, and the telescopic end of the cylinder 43 is connected with a clamping mechanism 44; the cylinder 43 is used for controlling the up and down movement of the clamping mechanism 44 to accurately align with the sample test tube on the storage tray 3; the clamping mechanism 44 is used for clamping the sample test tube stored on the storage tray 3.

[0042] Refer to Figures 3-4 , the clamping mechanism 44 includes a clamping cylinder 441 connected to the telescopic end of the cylinder 43; the clamping cylinder 441 drives the clamping arm 443 to open and close through its movable end; the movable end of the clamping cylinder 441 is mirror-symmetrically provided with a clamping arm 443, and one end of the clamping arm 443 is fixedly connected with a clamping head 4431; the clamping head 4431 is used for grasping the test tube, and its design takes into account anti-slip and stability to ensure the safety of the test tube during transfer.

[0043] Refer to Figures 5-6 , the shape of the clamping arm 443 is set to an L shape; the L-shaped structure can provide greater clamping force and adapt to test tubes of different specifications; an arc-shaped part 4432 is fixedly connected to the inner side of the clamping head 4431, and an anti-slip rubber strip is pasted on the inner arc surface of the arc-shaped part 4432; the anti-slip rubber strip increases the clamping friction force, prevents the test tube from slipping, and ensures safety during transfer.

[0044] Refer to Figures 3-5 , a connecting seat 442 is fixedly connected to the top of the clamping cylinder 441; the connecting seat 442 is used to stably hold the clamping cylinder 441 and ensure its stable connection with other components; a connecting block 431 that is engaged with the connecting seat 442 is fixedly connected to the telescopic end of the cylinder 43; the design of the connecting block 431 ensures the transmission stability between the cylinder 43 and the clamping cylinder 441.

[0045] Refer to Figures 3-4 , the translation mechanism 42 includes a guide member 422; the guide member 422 ensures the accurate moving direction of the translation mechanism 42 and reduces the error during movement; a linkage member 423 is movably inserted into the guide member 422; one end of the linkage member 423 is provided with a motor 421 for driving the movement of the linkage member 423; the motor 421 drives the linkage member 423 to move through rotation, realizing the precise positioning of the sample test tube.

[0046] Refer to Figure 4 , the guide member 422 includes a support member 4221, and guide tubes 4222 are fixedly connected to both ends of the top of the support member 4221; the guide tubes 4222 provide support and guidance for the movement of the linkage member 423; the linkage member 423 includes a pushing plate 4231, and a guide post 4233 is fixedly connected to the side surface of the pushing plate 4231, and the guide post 4233 penetrates through the guide tube 4222; the guide post 4233 slides in the guide tube 4222 to ensure the accurate movement path of the pushing plate 4231.

[0047] Refer to Figure 4 , the output end of the motor 421 is connected to a threaded column 4211; the threaded column 4211 cooperates with the threaded hole 4232 of the pushing plate 4231 to form a threaded transmission mechanism; a threaded hole 4232 adapted to the threaded column 4211 is formed through the side surface of the pushing plate 4231; this design enables the pushing plate 4231 to move precisely under the drive of the motor 421.

[0048] Refer to Figures 3-4 , one end of the guide post 4233 is fixedly connected to a connecting plate 4234; the connecting plate 4234 provides a stable connection for the guide post 4233 to ensure that it does not shift during movement.

[0049] Refer to Figure 5 , through grooves for fixing it to the movable end of the clamping cylinder 441 are symmetrically formed through the side surface of one end of the clamping arm 443; the design of the through grooves facilitates the installation and fixation of the clamping arm 443 and ensures the clamping stability of the clamping cylinder 441 for the test tube.

[0050] The working principle of the present utility model is as follows:

[0051] Place the test tube containing the sample to be detected into the corresponding groove on the storage tray 3. When it is necessary to transfer the sample stored on the storage tray 3 into the sample injection mechanism 2, at this time, the storage tray 3 will be pushed by the driving device located at its bottom, causing the storage tray 3 to rotate to a suitable position;

[0052] Then, driven by the motor 421, it will drive the linkage member 423 to move on the guide member 422, thereby driving the cylinder 43 and the clamping mechanism 44 to move synchronously. When the clamping head 4431 moves to the position directly above the test tube to be clamped, the motor 421 stops at this time;

[0053] At the same time, the cylinder 43 will drive the clamping mechanism 44 to move downward. During the downward movement of the clamping mechanism 44, the clamping mechanism 44 will drive the two clamping arms 443 to open, so that the arc-shaped member 4432 can clamp the test tube stored on the storage tray 3. When the arc-shaped member 4432 can clamp to one-third of the height of the test tube, the cylinder 43 will stop working. At this time, the clamping cylinder 441 will drive the two clamping arms 443 to approach each other, so that the arc-shaped member 4432 can clamp and fix the test tube;

[0054] After clamping the test tube, then with the cooperation of the translation mechanism 42, the cylinder 43 and the clamping mechanism 44, the test tube is transferred to the sample injection mechanism 2;

[0055] The entire process of sample transfer does not require manual intervention, thus avoiding the errors caused by manual operation and improving the accuracy of detection.

[0056] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A gas chromatograph with high detection accuracy, characterized in that: The invention comprises a machine body (1), wherein a sample introduction mechanism (2) for introducing a sample to be detected into the machine body (1) and a material storage tray (3) for storing the sample to be detected are arranged on the top of the machine body (1), and a loading mechanism (4) is arranged on the top of the material storage tray (3), wherein the loading mechanism (4) is used to transfer the sample stored on the material storage tray (3) into the sample introduction mechanism (2), so that the sample introduction mechanism (2) can inject the sample into the machine body (1).

2. A gas chromatograph with high detection accuracy according to claim 1, characterized in that: The feeding mechanism (4) comprises a housing (41), a translation mechanism (42) is arranged inside the housing (41), a movable end of the translation mechanism (42) is connected to a cylinder (43), a retracted end of the cylinder (43) is connected to a clamping mechanism (44), and the clamping mechanism (44) is used to clamp the sample test tube stored on the storage tray (3).

3. A gas chromatograph with high detection accuracy according to claim 2, characterized in that: The clamping mechanism (44) comprises a clamping cylinder (441) connected to the telescopic end of the cylinder (43), a clamping arm (443) is mirror-imaged at the movable end of the clamping cylinder (441), and a clamping head (4431) is fixedly connected to one end of the clamping arm (443).

4. A gas chromatograph with high detection accuracy according to claim 3, characterized in that: The shape of the clamping arm (443) is set to be L-shaped; The inner side of the clamping head (4431) is fixedly connected to an arc-shaped piece (4432), and an anti-slip rubber strip is adhered to the inner arc surface of the arc-shaped piece (4432).

5. The gas chromatograph with high detection accuracy according to claim 3, characterized in that: The top of the clamping cylinder (441) is fixedly connected to a connecting seat (442), and the telescopic end of the cylinder (43) is fixedly connected to a connecting block (431) engaged with the connecting seat (442).

6. A gas chromatograph with high detection accuracy according to claim 2, characterized in that: The translation mechanism (42) comprises a guide member (422), a linkage member (423) is movably plugged into the guide member (422), and a motor (421) for driving the linkage member (423) to move is provided at one end of the linkage member (423).

7. A gas chromatograph with high detection accuracy according to claim 6, characterized in that: The guide member (422) comprises a support member (4221), and both ends of the top of the support member (4221) are fixedly connected with guide tubes (4222); The linkage member (423) comprises a pushing plate (4231), a side surface of the pushing plate (4231) being fixedly connected to a guide column (4233), and the guide column (4233) passes through the guide tube (4222).

8. A gas chromatograph with high detection accuracy according to claim 7, characterized in that: The output end of the motor (421) is connected to a threaded column (4211), and a threaded hole (4232) matching the threaded column (4211) is formed through the side surface of the push plate (4231).

9. A gas chromatograph with high detection accuracy according to claim 8, characterized in that: One end of the guide column (4233) is fixedly connected to a connecting plate (4234).

10. A gas chromatograph with high detection accuracy according to claim 3, characterized in that: A through groove is symmetrically formed on the side surface of one end of the clamping arm (443) and is used to fix the clamping arm (443) on the movable end of the clamping cylinder (441).

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