Multi-channel automatic sample injection detection device for agricultural products based on gas chromatography

Abstract

The utility model relates to the technical field of agricultural product detection, and discloses an agricultural product multi-channel automatic sample injection detection device based on gas chromatography, which comprises a gas chromatograph box body, and a plurality of detection channel pipes are arranged on the inner side of the gas chromatograph box body. According to the gas chromatograph disclosed by the utility model, the plurality of detection channel pipes are arranged on the inner side of the gas chromatograph box body, the rectangular sample detection vessels are filled in the plurality of detection channel pipes, and the plurality of agricultural product partition plates are arranged in the plurality of detection channel pipes, so that different agricultural products can be placed in the rectangular sample detection vessels; when agricultural products in the rectangular sample detection vessel pass through the internal detection opening, gas chromatography detection is carried out, the driving roller drives the rectangular sample detection vessel to move backwards, uniform-speed automatic pushing can be achieved, automatic detection is convenient, multiple channels of the device can carry out agricultural product detection at the same time, automatic sample separation detection is achieved, the detection efficiency is relatively high, and the labor cost is low.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product testing technology, specifically a multi-channel automatic sample injection and testing device for agricultural products based on gas chromatography. Background Technology

[0002] With the development of modern agriculture, the demand for agricultural product quality and safety testing is increasing. Currently, multi-residue detection methods based on gas chromatography-mass spectrometry (GC-MS) have become an important means of agricultural product safety assessment. While the pass rate of routine monitoring of agricultural product quality and safety in my country has exceeded 98%, traditional testing methods still face efficiency bottlenecks. In the field of pesticide residue detection, existing equipment mostly relies on single-channel manual sample introduction, which is insufficient to meet the needs of rapid screening of large batches of samples. Therefore, it is necessary to use new gas chromatographs for agricultural product testing.

[0003] Gas chromatography (GC) is commonly used to determine residues (such as pesticide residues, veterinary drug residues, personal care product residues, illegal additives, and related substances) in food or pharmaceutical matrix samples. However, in practical applications, existing agricultural product testing methods typically involve manual, single-stage testing. Multi-channel automated agricultural product testing capabilities are relatively insufficient, with inadequate automation and the inability to simultaneously test different agricultural products. This results in relatively low testing efficiency, long testing cycles, and high labor costs, failing to meet the time-sensitive requirements of agricultural product distribution. Therefore, we propose a multi-channel automated sampling and detection device for agricultural products based on GC to address these issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a multi-channel automated sampling and detection device for agricultural products based on gas chromatography. It has the advantages of simultaneous multi-channel detection of agricultural products, automated sample separation and detection, relatively high detection efficiency, and low labor costs.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-channel automatic sampling and detection device for agricultural products based on gas chromatography, comprising a gas chromatograph housing, wherein multiple detection channel tubes are provided on the inner side of the gas chromatograph housing;

[0008] Multiple detection channel tubes extend through the gas chromatograph housing. Each detection channel tube has a drive roller and a stepper motor at one end. The top of the drive roller extends into the detection channel tube. The output end of the stepper motor is connected to the drive roller. Each detection channel tube has a slidable rectangular sample detection dish that can be inserted into it. The rectangular sample detection dish has multiple agricultural product partitions arranged at equal intervals inside.

[0009] The rectangular sample detection dish has openings on both sides along its width, and the bottom of the rectangular sample detection dish abuts against the drive roller. The rotation of the drive roller can cause the rectangular sample detection dish to slide along the detection channel tube.

[0010] The detection channel tube has internal detection openings on both sides along its width.

[0011] Preferably, the plurality of detection channel tubes are arranged at equal intervals along the height direction of the gas chromatograph chamber, and the front and rear ends of the detection channel tubes are open, with the rectangular sample detection dish fitting and filling the inner side of the detection channel tubes.

[0012] Preferably, each of the detection channel tubes has a drive opening at the bottom, the top of the drive roller passes through the drive opening and extends to the inside of the detection channel tube, and the top of the drive roller is in contact with the bottom of the rectangular sample detection dish.

[0013] Preferably, each of the detection channel tubes is provided with a mounting base at its bottom, the stepper motor is fixedly connected to the mounting base, and the output end of the stepper motor is connected to the drive shaft of the drive roller.

[0014] Preferably, the gas chromatograph housing has a switch door on one side and multiple sealed windows on the other side. One end of each detection channel tube is inserted into the corresponding sealed window, and the other end is connected to the switch door of the gas chromatograph housing.

[0015] Preferably, each of the sealing windows is provided with an elastic rubber ring on one side of the gas chromatograph chamber, and the back of the detection channel tube is inserted into the elastic rubber ring.

[0016] Preferably, the rectangular sample detection dish is rectangular in shape, the length of the rectangular sample detection dish is greater than the length of the detection channel tube, and the rectangular sample detection dish is provided with a gripping movable rod on the side near the opening and closing door of the gas chromatograph.

[0017] Preferably, the interior of the rectangular sample testing dish is divided into multiple agricultural product testing chambers by an agricultural product partition, and agricultural product testing samples are placed in the agricultural product testing chambers.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, this utility model provides a multi-channel automatic sampling and detection device for agricultural products based on gas chromatography, which has the following beneficial effects:

[0020] 1. This multi-channel automated sampling and detection device for agricultural products based on gas chromatography (GC-MS) features multiple detection channel tubes inside the GC chamber. Each detection channel tube is filled with a rectangular sample dish. The rectangular sample dish has multiple agricultural product partitions spaced at equal intervals, dividing the interior into multiple detection chambers. Different agricultural products are placed in each detection channel tube, which has internal detection openings on both sides. When agricultural products in the rectangular sample dish pass through these internal detection openings, they can be detected by GC-MS, depending on the type of agricultural product. Multiple channels can simultaneously perform multiple detections, offering convenient and efficient detection. The device allows for simultaneous multi-channel detection of agricultural products with stable and relatively high efficiency.

[0021] 2. This multi-channel automatic sampling and detection device for agricultural products based on gas chromatography has a drive roller and a stepper motor installed on the back of the bottom of the detection channel tube. The stepper motor drives the drive roller to rotate, and the top of the drive roller extends to the inside of the detection channel tube. The rotation of the drive roller can drive the rectangular sample detection dish to move backward, and automatically push different agricultural products in the rectangular sample detection dish at a uniform speed. The automatic feeding is stable and the automatic detection is convenient. The device automates sample separation and detection, with relatively high detection efficiency and low labor costs. Attached Figure Description

[0022] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a rear-view perspective view of the structure of this utility model;

[0024] Figure 3 This is a top-view perspective view of the rear of the structure of this utility model;

[0025] Figure 4 This is a three-dimensional sectional view of the structure of this utility model from the rear.

[0026] Figure 5 This is a frontal perspective three-dimensional schematic diagram of the connection structure between the rectangular sample testing dish and the agricultural product partition of this utility model.

[0027] In the diagram: 1. Gas chromatograph housing; 2. Detection channel tube; 3. Drive roller; 4. Stepper motor; 5. Rectangular sample detection dish; 6. Agricultural product partition; 7. Internal detection opening; 8. Drive opening; 9. Mounting base; 10. Sealing window; 11. Elastic rubber ring; 12. Grip lever. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 5 A multi-channel automatic sampling and detection device for agricultural products based on gas chromatography includes a gas chromatograph housing 1, and multiple detection channel tubes 2 are provided inside the gas chromatograph housing 1.

[0030] Multiple detection channel tubes 2 extend through the gas chromatograph housing 1. Each detection channel tube 2 has a drive roller 3 and a stepper motor 4 at one end. The top of the drive roller 3 extends into the detection channel tube 2. The output end of the stepper motor 4 is connected to the drive roller 3. Each detection channel tube 2 has a slidable rectangular sample detection dish 5 inserted inside. The rectangular sample detection dish 5 has multiple agricultural product partitions 6 arranged at equal intervals inside.

[0031] The rectangular sample detection dish 5 has openings on both sides along its width. The bottom of the rectangular sample detection dish 5 abuts against the drive roller 3. The rotation of the drive roller 3 can cause the rectangular sample detection dish 5 to slide along the detection channel tube 2.

[0032] The detection channel tube 2 has internal detection openings 7 on both sides along its width;

[0033] The beneficial effects of this solution are as follows: Multiple detection channel tubes 2 are installed inside the gas chromatograph housing 1. Each detection channel tube 2 is filled with a rectangular sample detection dish 5, and multiple agricultural product partitions 6 are installed inside, allowing different agricultural products to be placed in the rectangular sample detection dish 5 for sealing and isolation. Internal detection openings 7 are opened on both sides of the detection channel tubes 2. When the agricultural products in the rectangular sample detection dish 5 pass through the internal detection openings 7, gas chromatography detection is performed. Multiple channels can perform multiple groups of simultaneous detection, making detection convenient and efficient. The stepper motor 4 drives the drive roller 3 to rotate, causing the rectangular sample detection dish 5 to move backward, automatically and uniformly pushing different agricultural products in the rectangular sample detection dish 5. Automatic feeding is stable and automatic detection is convenient. The device enables simultaneous detection of agricultural products through multiple channels, and automated sample separation detection results in relatively high detection efficiency and low labor costs.

[0034] Furthermore, multiple detection channel tubes 2 are arranged at equal intervals along the height direction of the gas chromatograph housing 1, with the front and rear ends of the detection channel tubes 2 being open, and the rectangular sample detection dish 5 is fitted and filled inside the detection channel tubes 2.

[0035] By setting multiple detection channel tubes 2 vertically and equidistantly arranged inside the gas chromatograph housing 1, stable and equidistant measurements can be performed. The measurements are stable and have good adaptability. Furthermore, the front and rear ends of the detection channel tubes 2 are open, allowing the rectangular sample detection dish 5 to be stably inserted and displaced by the detection channel tubes 2, resulting in excellent adaptability.

[0036] Furthermore, each detection channel tube 2 is provided with a drive opening 8 at the bottom, the top of the drive roller 3 passes through the drive opening 8 and extends to the inside of the detection channel tube 2, and the top of the drive roller 3 is connected to the bottom of the rectangular sample detection dish 5.

[0037] By setting the drive opening 8, the top of the drive roller 3 extends from the drive opening 8 to the inside of the detection channel tube 2, thus achieving stable adaptation and good conveying effect.

[0038] Furthermore, each detection channel tube 2 is provided with a mounting base 9 at its bottom, and the stepper motor 4 is fixedly connected to the mounting base 9. The output end of the stepper motor 4 is connected to the drive shaft of the drive roller 3.

[0039] By setting the mounting base 9, the stepper motor 4 can be stably installed on the mounting base 9, with excellent installation adaptability. The output end of the stepper motor 4 is connected to the drive shaft of the drive roller 3, so that the stepper motor 4 can drive the drive roller 3 to rotate, and the operation and holding effect is good.

[0040] Furthermore, the gas chromatograph housing 1 has a switch door on one side and multiple sealed windows 10 on the other side. One end of each detection channel tube 2 is inserted into the corresponding sealed window 10, and the other end is connected to the switch door of the gas chromatograph housing 1.

[0041] By setting the sealing window 10, the detection channel tube 2 can be installed at the opening and closing door of the gas chromatograph housing 1. Opening the opening and closing door allows the detection channel tube 2 to be detached from the housing of the gas chromatograph housing 1. The sealing window 10 can support and fix the rear end of the detection channel tube 2, ensuring stable installation.

[0042] Furthermore, each sealing window 10 is provided with an elastic rubber ring 11 on one side inside the gas chromatograph housing 1, and the back of the detection channel tube 2 is inserted into the elastic rubber ring 11.

[0043] By setting the elastic rubber ring 11, the sealing window 10 can support the elastic rubber ring 11. When the door is closed, the rear end of the detection channel tube 2 can be inserted into the elastic rubber ring 11. The elastic rubber ring 11 can limit the detection channel tube 2 and prevent leakage, resulting in good sealing protection.

[0044] Furthermore, the rectangular sample detection dish 5 is rectangular in shape, and the length of the rectangular sample detection dish 5 is greater than the length of the detection channel tube 2. The rectangular sample detection dish 5 is provided with a gripping movable rod 12 on the side near the opening and closing door of the gas chromatograph housing 1.

[0045] By setting the rectangular sample detection dish 5 to have a rectangular side, and the front-to-back distance of the rectangular sample detection dish 5 is greater than the front-to-back distance of the detection channel tube 2, the rectangular sample detection dish 5 can be inserted into the detection channel tube 2 for displacement. The grasping movable rod 12 can be held by hand for hand displacement, making the device displacement stable and with excellent adaptability.

[0046] Furthermore, the interior of the rectangular sample testing dish 5 is divided into multiple agricultural product testing chambers by agricultural product partitions 6, and agricultural product testing samples are placed in the agricultural product testing chambers;

[0047] The rectangular sample testing dish 5 is divided into multiple agricultural product testing chambers by agricultural product partitions 6, which serve to place agricultural products and place agricultural product testing samples inside the testing chambers. Different types of agricultural product testing samples are placed in different agricultural product testing chambers, ensuring stable testing adaptation.

[0048] It should be noted that all the devices in this application are common devices on the market, and can be selected according to the needs of specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection. Those skilled in the art can easily implement it. It belongs to the prior art and will not be described in detail.

[0049] Working principle: Multiple detection channel tubes 2 are provided inside the gas chromatograph housing 1. Each detection channel tube 2 is filled with a rectangular sample detection dish 5. Multiple agricultural product partitions 6 are arranged at equal intervals inside the rectangular sample detection dish 5, which can divide the interior of the rectangular sample detection dish 5 into multiple agricultural product detection chambers, each containing different agricultural products. The detection channel tubes 2 have internal detection openings 7 on both sides. When the agricultural products in the rectangular sample detection dish 5 pass through the internal detection openings 7, they can be detected by gas chromatography according to the different agricultural products. Multiple channels can be used for multiple groups of simultaneous detection, which is convenient and efficient.

[0050] The bottom back of the detection channel tube 2 is equipped with a drive roller 3 and a stepper motor 4. Running the stepper motor 4 can drive the drive roller 3 to rotate. The top of the drive roller 3 extends to the inside of the detection channel tube 2. The rotation of the drive roller 3 can drive the rectangular sample detection dish 5 to move backward. It can automatically push different agricultural products in the rectangular sample detection dish 5 at a uniform speed, ensuring stable automatic feeding and convenient automatic detection. This allows the device to simultaneously detect agricultural products in multiple channels, and it can also automatically sort and detect samples. The detection efficiency is relatively high and the labor cost is low.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-channel automatic injection detection device for agricultural products based on gas chromatography, comprising a gas chromatograph box (1), characterized in that: The inside of the gas chromatograph box (1) is provided with a plurality of detection channel pipes (2); A plurality of detection channel pipes (2) are arranged in the gas chromatograph box (1), and each detection channel pipe (2) is provided with a driving roller (3) and a stepping motor (4) below one end thereof; the top of the driving roller (3) extends into the detection channel pipe (2); the output end of the stepping motor (4) is connected to the driving roller (3); and a slidable rectangular sample detection dish (5) is slidably inserted into each detection channel pipe (2); a plurality of agricultural product partitions (6) are equidistantly arranged in the rectangular sample detection dish (5). The two sides of the rectangular sample detection dish (5) along the width are open; the bottom of the rectangular sample detection dish (5) abuts against the driving roller (3); and the driving roller (3) rolls to drive the rectangular sample detection dish (5) to slide along the detection channel pipe (2). The two sides of the detection channel pipe (2) along the width are provided with internal detection openings (7).

2. The multi-channel automatic sampling detection device for agricultural products based on gas chromatography according to claim 1, characterized in that: A plurality of detection channel pipes (2) are arranged in the gas chromatograph box (1) in an equidistant and spaced manner along the height direction; the front and rear ends of the detection channel pipe (2) are open; and the rectangular sample detection dish (5) is filled in the inside of the detection channel pipe (2).

3. The multi-channel automatic sampling detection device for agricultural products based on gas chromatography according to claim 1, characterized in that: The bottom of each detection channel pipe (2) is provided with a driving opening (8); the top of the driving roller (3) penetrates through the driving opening (8) and extends into the inside of the detection channel pipe (2); and the top of the driving roller (3) abuts against the bottom of the rectangular sample detection dish (5).

4. The multi-channel automatic sampling detection device for agricultural products based on gas chromatography according to claim 1, characterized in that: The bottom of each detection channel pipe (2) is provided with a mounting seat (9); the stepping motor (4) is fixedly connected to the mounting seat (9); and the output end of the stepping motor (4) is connected to the driving shaft of the driving roller (3).

5. The multi-channel automatic sampling device for agricultural products based on gas chromatography according to claim 1, characterized in that: One side of the gas chromatograph box (1) is provided with a switch door; the other side is provided with a plurality of sealed windows (10); one end of each detection channel pipe (2) is inserted into the corresponding sealed window (10); and the other end is connected to the switch door of the gas chromatograph box (1).

6. The multi-channel automatic sampling detection device for agricultural products based on gas chromatography according to claim 5, characterized in that: Each sealed window (10) is provided with an elastic rubber ring (11) on one side in the gas chromatograph box (1); and the back of the detection channel pipe (2) is inserted into the elastic rubber ring (11).

7. The multi-channel automatic sampling device for agricultural products based on gas chromatography according to claim 1, characterized in that: The rectangular sample detection dish (5) is rectangular; the length of the rectangular sample detection dish (5) is greater than the length of the detection channel pipe (2); and the rectangular sample detection dish (5) is provided with a gripped movable rod body (12) on the side close to the switch door of the gas chromatograph box (1).

8. The multi-channel automatic sampling device for agricultural products based on gas chromatography according to claim 1, characterized in that: The inside of the rectangular sample detection dish (5) is divided into a plurality of agricultural product detection cavities by the agricultural product partitions (6); and agricultural product detection samples are placed in the agricultural product detection cavities.

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