Multi-channel combined type grain heavy metal content detection device

Abstract

The utility model provides a multi-channel combined type grain heavy metal content detection device which comprises an outer shell and is characterized in that a detection structure is arranged in the outer shell and comprises a plurality of U-shaped detection pipes which are uniformly distributed and penetrate through the outer shell, and adjusting pieces corresponding to the detection pipes are arranged at the ends, arranged on the inner side of the outer shell, of the detection pipes. A rotating rod corresponding to the adjusting piece is arranged above the outer shell, the rotating rod rotates to correspond to different detection pipes through a detection structure arranged in the outer shell, and different feeding channels are selected to distinguish different grain samples; a chemical reagent is contained in the outer shell and enters the detection tube through the adjusting part to be mixed with a crushed grain sample, due to the U-shaped design of the detection tube, the mixed sample is precipitated at the bottom of the U-shaped tube, and at the moment, detection can be carried out through sample liquid at one end, arranged on the outer side of the outer shell, of the detection tube; and the current intensity of the liquid is measured.

Description

Technical Field

[0001] The utility model provides a device for detecting the heavy metal content in grains, belongs to the technical field of equipment for detecting the heavy metal content in grains, and particularly relates to a multi-channel combined device for detecting the heavy metal content in grains. Background Art

[0002] The electrochemical electrode method is an analytical technology based on electrochemical principles. It uses a specific electrode as the working electrode after appropriate pretreatment of the grain sample. By applying voltage or current, the heavy metal ions to be measured undergo redox reactions on the electrode surface, thereby generating changes in current or voltage. Based on the quantitative relationship between these changes and the concentration of heavy metal ions, the content of heavy metals such as lead, cadmium, mercury, and arsenic in grain can be accurately determined. This method has the advantages of high sensitivity, fast detection speed, simple operation, and relatively low cost. The use of a multi-channel system further improves the detection throughput and efficiency, making this method widely used in the field of grain heavy metal detection.

[0003] In the current field of electrochemical analysis, traditional electrode-based techniques are often limited to a single-channel detection mode for the quantitative analysis of heavy metal content in grain samples. This means that each experiment can only measure the electrochemical response of a specific heavy metal ion in a single sample. This single-sample detection strategy results in lower analytical throughput, increases the overall detection cycle, and thus reduces the efficiency of the detection process. In addition, due to the repetitiveness of experimental operations and possible systematic errors, the single-channel detection mode may introduce random errors, which in turn affect the accuracy and precision of the measurement results. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technology, the embodiments of the present application provide a multi-channel combined grain heavy metal content detection device, which solves the problem of low detection efficiency of a single channel, realizes rapid parallel analysis of the heavy metal content in multiple grain samples, significantly improves detection efficiency and accuracy, reduces operation complexity, and enhances the practicality and reliability of the detection system.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a multi-channel combined food heavy metal content detection device, including an outer shell, characterized in that a detection structure is provided inside the outer shell, the detection structure includes a number of U-shaped detection tubes evenly distributed and passing through the outer shell, the detection tube is placed on the inner side of the outer shell and is provided with an adjustment piece corresponding to itself on one end, and a rotating rod corresponding to the adjustment piece is provided above the outer shell.

[0006] Preferably, a through hole is provided on the upper portion of the outer shell, which passes through one side plate of the outer shell and is positioned between the detection structures. A sealing plug is provided inside the through hole, which corresponds to the outer shell and is movably connected to the rotating rod.

[0007] Preferably, a clamp is fixedly connected to one end of the rotating rod away from the sealing plug, a convex piece corresponding to the clamp is provided below the clamp, and the other end of the convex piece is fixedly connected to a connecting tube inserted into the detection tube.

[0008] Preferably, the connecting tube is externally sheathed with a sleeve corresponding to the detection tube, the sleeve is tightly attached to the outer wall of the detection tube, and a certain gap is provided between the connecting tube and the inner wall of the detection tube.

[0009] Preferably, the clamp is provided with a delivery port connected to the connecting tube, the kit is provided with a liquid injection hole penetrating the clamp and a side wall of the detection tube, and a filter is provided inside the end of the detection tube away from the liquid injection hole.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0011] The utility model provides a detection structure placed inside the outer shell, and the rotating rod rotates itself to correspond to different detection tubes, selecting different feeding channels to distinguish different grain samples; the outer shell contains chemical reagents, which enter the detection tube through an adjusting piece and mix with the crushed grain sample. Due to the U-shaped design of the detection tube, the mixed sample is precipitated at the bottom of the U-shaped tube. At this time, the sample liquid at one end of the detection tube placed outside the outer shell can be tested, and the metal content concentration can be known by measuring the current intensity of the liquid.

[0012] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional schematic diagram of a multi-channel combined grain heavy metal content detection device of the present invention;

[0014] Figure 2 This is a cross-sectional view of a multi-channel combined grain heavy metal content detection device according to the present invention;

[0015] Figure 3 This is an exploded view of the detection structure of a multi-channel combined grain heavy metal content detection device of the utility model;

[0016] Figure 4 This is a cross-sectional view of a detection tube of a multi-channel combined grain heavy metal content detection device of the present invention.

[0017] As shown in the figure:

[0018] 1. Outer shell;

[0019] 11. Rotating rod; 12. Through hole; 13. Sealing plug; 14. Clamp; 15. Feeding port;

[0020] 2. Detection structure;

[0021] 21. Detection tube; 22. Adjustment piece; 23. Protrusion; 24. Connecting tube; 25. Kit; 26. Liquid injection hole; 27. Filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] like Figure 1 and Figure 2As shown, a multi-channel combined type grain heavy metal content detection device includes an outer shell 1, which is provided with a detection structure 2 inside. The detection structure 2 includes a number of U-shaped detection tubes 21 that are evenly distributed and pass through the outer shell 1. The detection tube 21 is placed on the inner side of the outer shell 1 and is provided with an adjustment part 22 corresponding to itself on one end. A rotating rod 11 corresponding to the adjustment part 22 is provided above the outer shell 1. Chemical reagents are placed inside the outer shell 1, and the chemical reagents enter the detection tube 21 through the adjustment part 22 and mix with the crushed grain sample. A through hole 12 is provided above the outer shell 1, which passes through one side plate of itself and is placed between the detection structure 2. A sealing plug 13 corresponding to itself and movably connected to the rotating rod 11 is provided inside the through hole 12. The rotating rod 11 rotates itself to correspond to different detection tubes 21, selects different feeding channels, and distinguishes different grain samples. Chemical agents are stored in the outer shell 1. After the sealing plug 13 is opened and the chemical agents are injected to a certain height, they will flow into the detection tube 21 from the injection hole 26. There is a certain gap between the connecting tube 24 and the detection tube 21, which allows the liquid to pass through while preventing the mixed liquid from flowing back and contaminating the chemical agents. This structure can add reagents to multiple samples at the same time.

[0026] In this embodiment, a detection structure 2 is integrated inside the outer shell 1 of the detection device, and the structure is dynamically docked with multiple detection tubes 21 through the rotation of the rotating rod 11, so as to select a specific feeding channel. This design allows different grain samples to be distinguished and processed independently. The outer shell 1 is filled with chemical reagents, which are transported to the detection tube 21 under the control of the adjustment member 22 and mixed with the crushed grain sample. The U-shaped design of the detection tube 21 promotes the sedimentation process of the mixed sample at the bottom of the tube. The sample liquid after precipitation can be sampled through one end of the detection tube 21 extending outside the outer shell 1, and the concentration of metal ions therein can be accurately determined by measuring the current response intensity of the liquid.

[0027] like Figure 3 and Figure 4As shown, a clamp 14 is fixedly connected to the end of the rotating rod 11 away from the sealing plug 13. Below the clamp 14 is a corresponding protrusion 23. The other end of the protrusion 23 is fixedly connected to a connecting tube 24 that is inserted into the interior of the detection tube 21. A sleeve 25 corresponding to the detection tube 21 is sheathed around the exterior of the connecting tube 24. The sleeve 25 fits snugly against the outer wall of the detection tube 21, leaving a gap between the connecting tube 24 and the inner wall of the detection tube 21. The clamp 14 is provided with a delivery port 15 that communicates with the connecting tube 24. The sleeve 25 is provided with a liquid injection hole 26 that extends through the clamp 14 and the side wall of the detection tube 21. A filter 27 is installed inside the end of the detection tube 21 away from the injection hole 26. The clamp 14 is locked onto the protrusion 23 to prevent sample spillage during delivery. Due to the U-shaped design of the detection tube 21, the mixed sample settles at the bottom of the U-shaped tube. At this point, the sample liquid at the end of the detection tube 21, placed outside the outer shell 1, can be tested. The current intensity of the liquid is measured, which provides the metal concentration. This design allows for simultaneous testing of multiple samples, improving detection efficiency and accuracy.

[0028] In this embodiment, a chemical reagent storage unit is provided in the outer shell 1 of the detection device, and the unit is designed with a drug injection mechanism. When the operator removes the sealing plug 13 and adds chemical reagents to the preset liquid level, the reagents are continuously transferred to the detection tube 21 through the injection hole 26. In addition, the gap design between the connecting tube 24 and the detection tube 21 ensures one-way fluid transmission, prevents the backflow phenomenon after the reagents are mixed, and thus avoids cross contamination of chemical reagents. The injection system supports simultaneous reagent distribution of multiple samples, improving the parallel processing capability of the detection process. The stable delivery of samples is achieved through the mechanical interlocking of the card 14 and the protrusion 23, ensuring the airtightness and integrity of the sample during the addition process.

[0029] When in use, first ensure that all detection tubes 21 and related components are clean and dry, and then add chemical reagents to the chemical reagent storage unit of the outer shell 1 until the predetermined liquid level is reached; open the sealing plug 13 above the outer shell 1, and inject the chemical reagent into the detection tube 21 through the injection hole 26. Ensure that the reagent flows smoothly into the detection tube 21 through the connecting tube 24, and at the same time, the gap design prevents the reagent from flowing back and cross contamination; place the grain sample to be tested in the corresponding detection tube 21. Use the clip 14 to buckle on the protrusion 23 to ensure that there will be no overflow when the sample is put in, and maintain the stability of the sample; crush the grain sample placed in the detection tube 21 to facilitate the full mixing of the chemical reagent and the sample; through the operation of the rotating rod 11, guide the chemical reagent through the adjustment part 22 to the corresponding detection tube 21 and mix it with the crushed grain sample. The U-shaped design of the detection tube 21 allows the mixed sample to complete sedimentation at the bottom of the tube; after the sample is settled, the end of the detection tube 21 extending outside the outer shell 1 is prepared for sampling and testing; by connecting an electrochemical detection instrument, the current intensity of the sample liquid in the detection tube 21 is measured, and the concentration of metal ions is analyzed based on the current response intensity; the electrochemical detection results are recorded, and the heavy metal content in the grain sample is calculated based on the standard curve or preset calibration parameters; after the detection is completed, the detection tube 21 and related components are cleaned and maintained for next use.

[0030] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A multi-channel combined type grain heavy metal content detection device, comprising an outer shell (1), characterized in that: A detection structure (2) is provided inside the outer shell (1), and the detection structure (2) comprises a plurality of evenly distributed U-shaped detection tubes (21) that penetrate the outer shell (1). An adjustment member (22) corresponding to the detection tube (21) is provided on one end of the inner side of the outer shell (1). A rotating rod (11) corresponding to the adjustment member (22) is provided above the outer shell (1).

2. The multi-channel combined type grain heavy metal content detection device according to claim 1, characterized in that: A through hole (12) is provided above the outer shell (1) and passes through one side plate of the outer shell and is positioned between the detection structures (2). A sealing plug (13) is provided inside the through hole (12) and corresponds to the through hole and is movably connected to the rotating rod (11).

3. The multi-channel combined type grain heavy metal content detection device according to claim 2, characterized in that: A clamping member (14) is fixedly connected to one end of the rotating rod (11) away from the sealing plug (13); a convex member (23) corresponding to the clamping member (14) is provided below the clamping member (14); and the other end of the convex member (23) is fixedly connected to a connecting pipe (24) inserted into the interior of the detection tube (21).

4. The multi-channel combined grain heavy metal content detection device according to claim 3, characterized in that: The connecting tube (24) is externally sleeved with a sleeve (25) corresponding to the detection tube (21), the sleeve (25) is closely attached to the outer wall of the detection tube (21), and a certain gap is provided between the connecting tube (24) and the inner wall of the detection tube (21).

5. The multi-channel combined type grain heavy metal content detection device according to claim 4, characterized in that: The clamp (14) is provided with a delivery port (15) connected to the connecting pipe (24), the kit (25) is provided with a liquid injection hole (26) penetrating the kit (25) and the side wall of one side of the detection tube (21), and a filter screen (27) is provided inside the end of the detection tube (21) away from the liquid injection hole (26).

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