Powdered sample sub-sampling device for mycotoxin detection in grain

Abstract

The utility model discloses a be applicable to the powder sample of grain fungus toxin detection's short -fractionation sampling device, including casing, material box, short -fractionation assembly and sampling assembly, short -fractionation assembly is by short -fractionation board and installs fixed block on the lateral wall of short -fractionation board and is composed, the short -fractionation board divides a plurality of equal area short -fractionation unit, and the sampling assembly of different short -fractionation sampling ratio is formed through the different combination installation of blanking pipe and plugging piece. The utility model has the advantages that: short -fractionation assembly, sampling assembly and material box can be detachably installed in casing, through multiple inversion, simplify the operation of multiple short -fractionation sampling, and through the combination of plugging piece and material pipe, the short -fractionation ratio can be adjusted, the short -fractionation sampling ratio is adjusted, after determining the short -fractionation sampling ratio, the powder sample in material cavity is directly short -fractionated and sampled through equal division pipe, and the operation of short -fractionation sampling under different short -fractionation sampling ratios is simplified.

Description

Technical Field

[0001] This utility model relates to the field of agricultural facility technology, and in particular to a powder sample reduction and sampling device suitable for the detection of mycotoxins in grains. Background Technology

[0002] Grain quality testing is a crucial step in grain storage, and mycotoxin detection is a key indicator within grain quality testing. Mycotoxins are distributed extremely unevenly in grain. To ensure more uniform and representative test samples, a common practice is to pulverize the grain sample to be tested and perform testing on the powdered sample. To improve accuracy, methods such as increasing the sample volume, extending the mixing time of the powdered sample, and using multi-point sampling are often employed to obtain the final test results through fractional sampling. Detection methods vary significantly depending on the testing standards. For example, using national standards versus industry-standard rapid testing requires different sample volumes and sampling times, necessitating repeated switching of fractional reduction ratios. However, existing fractional sampling equipment often has fixed fractional reduction ratios, such as common dividers and quarter dividers. Repeatedly switching equipment under different testing standards makes the operation process cumbersome. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a powder sample reduction and sampling device suitable for the detection of mycotoxins in grains, which can achieve reduction and sampling at different ratios and simplify the reduction and sampling operation.

[0004] The purpose of this utility model is achieved through the following technical solution: a powder sample reduction and sampling device suitable for the detection of mycotoxins in grains, comprising a shell, a material box, a reduction component, and a sampling component. The shell is a hollow shell with connectors at both ends. There are two material boxes, each of which is detachably installed on the connector. Each material box has a material cavity for measuring the powder sample. The reduction component consists of a reduction plate and a fixing block installed on the side wall of the reduction plate. The reduction plate is detachably installed in the shell through the fixing block. The reduction plate divides into multiple reduction units of equal area. Each reduction unit has a through hole. The sampling component includes multiple material tubes for sampling and multiple sealing components for sealing the through holes. Each material tube consists of a dividing tube, a discharge tube, and a buffer tube connecting the dividing tube and the discharge tube. A discharge tube or a sealing component is selectively installed in one of the through holes in each reduction unit.

[0005] The external area of ​​the reducing plate is the same as the cross-sectional area of ​​the material cavity, and the external area of ​​the reducing unit is the same as the cross-sectional area of ​​the dividing tube. During reducing sampling, no material is discharged through the through hole where the sealing component is installed. The dividing tube is placed at the bottom of the material cavity containing the powder sample and separates the powder sample in the material cavity for sampling. The powder sample is discharged normally through the discharge pipe installed in the through hole. Sampling components with different reduction sampling ratios are formed by different combinations of discharge pipe and sealing component. The external area of ​​the reducing plate and reducing unit refers to the area formed by the region enclosed by the outermost edge of the reducing plate or reducing unit.

[0006] Preferably, the material cavity is rectangular or rectangular. The cross-sectional area of ​​the dividing tube is rectangular or rectangular, and the end of the dividing tube is set as a blade shape for separating the powder sample. Rectangular or rectangular shapes are the most convenient shapes for achieving equal division in actual production and are also convenient for manufacturing. Rectangular or rectangular shapes can achieve complete equal division, so they are the most preferred solution for this scheme. It should be noted that since the dividing plate corresponds to the material cavity, and the dividing plate is evenly divided into multiple dividing units (dividing tubes) of equal area, the material cavity can also be selected in other shapes for the powder sample to be divided, as long as the area of ​​the dividing unit (dividing tube) is evenly divided, that is, there is no restriction on the shape. In any division sampling process, the division ratio can be adjusted by the combination of the sealing component and the material tube to achieve adjustment of various division sampling ratios.

[0007] The material chamber is equipped with graduation lines, which allow for real-time calculation of the volume (quantity) of the powdered sample in the chamber. Preferably, the reducing plate is positioned directly opposite the material chamber when installed in the housing, facilitating the discharge of the powdered sample. The diameter of the equalizing tube is larger than the diameter of the discharge tube, and the buffer tube is a tapered tube connected to the equalizing tube at one end and the discharge tube at the other. Since the area of ​​the equalizing tube is equal to the area of ​​the reducing unit, and the discharge tube is placed in the through hole, the buffer tube is preferably a tapered tube for easy discharge. The equalizing tube, buffer tube, and discharge tube are arranged coaxially. The discharge tube and the through hole are fitted with an interference fit. Since the housing will be inverted in this application, the discharge tube and the through hole can be connected using a more convenient disassembly method, or common methods such as bolt fixing or snap-fit ​​fixing can be used, which will not be described in detail here. The sealing component is a rubber plug. The housing is provided with multiple non-penetrating guide grooves arranged along the discharge direction, and the fixing block is slidably installed in the guide grooves and drives the reducing plate to move. Furthermore, for the detachable connection in this solution, either a threaded connection or a bolt fixation can be used, as long as a detachable connection can be achieved.

[0008] The housing of this application has two feed ports, each with a detachable feed box for the main pipe. A reducing plate is detachably installed inside the housing, and the through holes on the reducing plate can be combined according to actual usage requirements. Specifically, this is achieved by sealing some through holes and installing a feed tube in the remaining through holes. In use, the powdered sample to be reduced and sampled is laid flat in the feed box. At the same time, the reducing component and the sampling component are installed in the housing. Then, the housing is installed on the feed box, and the dividing tube is inserted into the bottom of the feed chamber to separate the powdered sample. The other port of the housing is equipped with... With the empty material box, the entire reduction sampling device is now assembled. Inverting the device allows for reduction sampling. For example, when performing 1 / 5 sampling, the reduced powder sample falls into the pre-placed (upper) material box, while the remaining powder sample falls onto the reduction plate (the excess powder sample can be removed by disassembling). The housing, reduction assembly, and sampling assembly can then be disassembled to reverse the direction of the sampling tubes. Reassembly allows for further reduction sampling of the powder sample obtained from the 1 / 5 sampling. Therefore, this application can achieve continuous multiple reduction sampling. For easy direct observation, relevant components of this device can be made of transparent material.

[0009] The beneficial effects of this utility model are: (1) The reduction component, the sampling component and the material box can all be disassembled and installed in the shell. By inverting multiple times, the operation of multiple reduction sampling is simplified; (2) The reduction ratio can be adjusted by the combination of the sealing component and the material tube, and the reduction sampling ratio can be adjusted. After determining the reduction sampling ratio, the powder sample in the material cavity can be directly reduced and sampled through the equal division tube, which simplifies the operation of reduction sampling under different reduction sampling ratios. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0011] Figure 2 This is an installation diagram of Embodiment 1 of the present invention;

[0012] Figure 3 This is a schematic diagram of the structure of the reduction plate in Embodiment 1 of this utility model;

[0013] Figure 4 This is a schematic diagram of the material box in Embodiment 1 of this utility model;

[0014] Figure 5 This is a side view of the material box in Embodiment 1 of this utility model;

[0015] Figure 6 This is a schematic diagram of the shell structure in Embodiment 1 of this utility model;

[0016] Figure 7 This is a schematic diagram of the installation of the reduction component and the sampling component during the first reduction sampling in Embodiment 1 of this utility model;

[0017] Figure 8 This is a schematic diagram of the installation of the reduction component and the sampling component during the second reduction sampling in Embodiment 1 of this utility model;

[0018] Figure 9 This is an installation diagram of Embodiment 2 of the present invention;

[0019] Figure 10 This is a schematic diagram of the shell structure in Embodiment 2 of this utility model.

[0020] In the diagram, 1-shell, 2-material box, 3-reduction assembly, 4-sampling assembly, 101-connector, 102-guide groove, 103-slot, 201-material cavity, 202-insertion strip, 301-reduction plate, 302-fixing block, 303-reduction unit, 304-through hole, 401-material tube, 402-sealing component, 403-division tube, 404-drop tube, 405-buffer tube. Detailed Implementation

[0021] The technical solution of this utility model is described in further detail below with reference to the accompanying drawings and embodiments, but the protection scope of this utility model is not limited to the following description.

[0022] Example 1

[0023] like Figures 1-2 As shown, a powder sample reduction and sampling device suitable for detecting mycotoxins in grains includes a shell 1, a material box 2, a reduction component 3, and a sampling component 4. The shell 1 is a hollow shell with connectors 101 at both ends. There are two material boxes 2, each detachably mounted on a connector 101. Each material box 2 contains a material chamber 201 for measuring the powder sample. Figure 3 As shown, the reduction assembly 3 consists of a reduction plate 301 and a fixing block 302 installed on the side wall of the reduction plate 301. The reduction plate 301 is detachably installed in the housing 1 through the fixing block 302. The reduction plate 301 divides into multiple reduction units 303 of equal area. Each reduction unit 303 is provided with a through hole 304. The sampling assembly 4 includes multiple material tubes 401 for sampling and multiple sealing components 402 for sealing the through holes 304. Each material tube 401 consists of a dividing tube 403, a dropping tube 404, and a buffer tube 405 connecting the dividing tube 403 and the dropping tube 404. A dropping tube 404 or a sealing component 402 is selectively installed in one of the through holes 304 in each reduction unit 303.

[0024] The external area of ​​the reducing plate 301 is the same as the cross-sectional area of ​​the material cavity 201, and the external area of ​​the reducing unit 303 is the same as the cross-sectional area of ​​the equal-division tube 403. During reducing sampling, no material is discharged through the through hole 304 where the sealing component 402 is installed. The equal-division tube 403 is placed at the bottom of the material cavity 201 containing the powder sample and separates the powder sample in the material cavity 201 for sampling. The powder sample is discharged normally through the discharge pipe 404 installed in the through hole 304. Different combinations of the discharge pipe 404 and the sealing component 402 are used to form sampling components with different reducing sampling ratios. The material cavity 201 is rectangular.

[0025] The material chamber 201 is provided with graduation lines. When the dividing plate 301 is installed in the housing 1, it is positioned directly opposite the material chamber 201. The diameter of the dividing tube 403 is larger than the diameter of the discharge tube 404. The buffer tube 405 is a tapered tube with one end connected to the dividing tube 403 and the other end connected to the discharge tube 404. The sealing element 402 is a rubber plug. Since the cross-sectional area of ​​the dividing tube 403 is rectangular, for ease of installation, the dividing tube 403, buffer tube 405, and discharge tube 404 are all square tubes, and the corresponding sealing element 402 is a square plug. The through hole 304 is a square hole, and the end of the dividing tube 403 is set in a blade shape for separating powdered samples. The dividing tube 403, buffer tube 405, and discharge tube 404 are arranged coaxially. The discharge tube 404 and the through hole 304 are fitted with an interference fit. The housing 1 is provided with a plurality of non-penetrating guide grooves 102 arranged along the material dropping direction. The fixing block 302 is slidably mounted on the guide grooves 102 and drives the shrink plate 301 to move. It should be noted that the fixing block 302 can also be directly and detachably mounted on the housing 1 with bolts, and the housing 1 can be provided with corresponding screw holes.

[0026] like Figures 4-6As shown, the housing 1 and the material box 2 are detachably connected by interlocking, with a slot 103 on the connector 101 and a corresponding insert 202 on the material box 2. The connection between the housing 1 and the material box 2 facilitates sample reduction, ensuring that the housing 1 does not wobble when inverted. The material box 2 has a material cavity 201 with a length of 60cm, a width of 20cm, and a depth of 10cm. The reduction plate 301 has a length of 60cm, a width of 20cm, and a thickness of 3cm. The reduction plate 301 divides the material into rectangles with a length of 10cm and a width of 5cm. The corresponding equal-dividing tube 403 has a cross-section with a length of 10cm and a width of 5cm. The reduction plate 301 is divided into 24 equal-area reduction units 303. A material drop tube 404 or a sealing component 402 is installed on each reduction unit 303, allowing for sample reduction in combinations of 1 to 1 / 24. It should be noted that the shell 1 and the material box 2 can be either rectangular or cylindrical, as long as the space reserved for the material cavity 201 meets the usage requirements. During use, if... Figures 7-8 As shown, a powdered sample is first laid flat in one of the material boxes 2. The housing 1, the other material box 2, the reduction component 3, and the sampling component 4 are then installed sequentially to complete the assembly of the reduction sampling device. Initially, seven through holes 304 are sealed with sealing components 402. A discharge tube 404 is installed in the remaining through holes 304. The device is then inverted (flipped), completing 1 / 5 of the reduction sampling on the first attempt. The remaining 1 / 7 of the reduction sampling is then completed, referring to the first sampling method. In this application, since the reduction unit 303 (equal division tube 403) is equally divided, the discharge tube 404 can be installed in any of the through holes 304, making operation very convenient and greatly simplifying the reduction sampling process.

[0027] Example 2

[0028] like Figures 9-10 As shown, the housing 1 and the material box 2 can also be cylindrical. The housing 1 and the material box 2 are installed in a detachable manner by means of threaded connection. Specifically, the connector 101 is provided with an external thread, and the material box 2 is provided with a matching internal thread. The remaining parts and connection structure are as described in Embodiment 1.

[0029] As illustrated above with reference to the accompanying drawings, one embodiment of the present invention has been described by way of example. However, those skilled in the art should understand that various improvements can be made to the embodiment proposed above without departing from the scope of the present invention, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the appended claims.

Claims

1. A powdered sample portioning device suitable for use in the detection of mycotoxins in foodstuffs, characterised in that, The system includes a housing (1), a material box (2), a reduction assembly (3), and a sampling assembly (4). The housing (1) is a hollow housing with connectors (101) at both ends. There are two material boxes (2), each of which is detachably mounted on the connector (101). Each material box (2) has a material chamber (201) for measuring powdered samples. The reduction assembly (3) consists of a reduction plate (301) and a fixing block (302) mounted on the side wall of the reduction plate (301). The reduction plate (301) is detachably mounted in the housing (1) via the fixing block (302). The reduction plate (301) divides into multiple reduction units (303) of equal area. Each reduction unit (303) is provided with a through hole (304). The sampling component (4) includes multiple material tubes (401) for sampling and multiple sealing components (402) for sealing the through holes (304). Each material tube (401) is composed of a dividing tube (403), a dropping tube (404), and a buffer tube (405) connecting the dividing tube (403) and the dropping tube (404). A dropping tube (404) or a sealing component (402) is installed in one of the through holes (304) in each reduction unit (303). The external area of ​​the reducing plate (301) is the same as the cross-sectional area of ​​the material cavity (201), and the external area of ​​the reducing unit (303) is the same as the cross-sectional area of ​​the dividing tube (403). During the reducing sampling, the through hole (304) of the sealing component (402) does not drop material. The dividing tube (403) is placed at the bottom of the material cavity (201) with the powder sample and the powder sample in the material cavity (201) is separated and sampled. The powder sample drops normally through the dropping pipe (404) installed in the through hole (304). Different combinations of the dropping pipe (404) and the sealing component (402) are used to form sampling components with different reducing sampling ratios.

2. The powdered sample portioning device suitable for mycotoxin detection in foodstuffs according to claim 1, characterized in that, The material cavity (201) is rectangular or rectangular.

3. A powdered sample portioning device suitable for use in the detection of mycotoxins in foodstuffs according to any of claims 1 or 2, characterised in that, The material chamber (201) is provided with scale lines.

4. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, When the split plate (301) is installed in the housing (1), it is located directly opposite the material cavity (201).

5. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, The diameter of the equal-dividing pipe (403) is larger than the diameter of the discharge pipe (404), and the buffer pipe (405) is a tapered pipe with one end connected to the equal-dividing pipe (403) and the other end connected to the discharge pipe (404).

6. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, The sealing component (402) is a rubber plug.

7. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, The cross-sectional area of ​​the dividing tube (403) is rectangular or rectangular, and the end of the dividing tube (403) is set as a blade shape for separating powder samples.

8. The powder sample reduction and sampling device for the detection of mycotoxins in grains according to claim 1 or 5, characterized in that, The equal-division pipe (403), buffer pipe (405) and discharge pipe (404) are arranged coaxially.

9. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, The material discharge tube (404) and the through hole (304) are fitted with an interference fit.

10. The powder sample reduction and sampling device for detecting mycotoxins in grains according to claim 1, characterized in that, The housing (1) is provided with a plurality of non-penetrating guide grooves (102) arranged along the material dropping direction. The fixing block (302) is slidably installed in the guide groove (102) and drives the shrink plate (301) to move.

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