Pretreatment device for pesticide residue detection of agricultural products

Abstract

The utility model provides an agricultural product pesticide residue detection pretreatment device which comprises a crushing part and a collecting part, the collecting part comprises an intercepting part, a filter screen part and a collecting base which are sequentially arranged from top to bottom, and all the parts can be sequentially disassembled and are convenient to clean and assemble; a collecting strip is arranged in the crushing part to scrape a sample adhered to the bottom surface and assist the sample in entering the filtering and collecting part, so that the device is particularly suitable for detecting agricultural products which contain grease components, are easy to adhere and are not easy to filter, and is simple in structure, convenient to disassemble and clean and wide in application prospect.

Description

Technical Field

[0001] This utility model belongs to the technical field of solution extraction equipment, specifically relating to a pretreatment device for detecting pesticide residues in agricultural products. Background Technology

[0002] Before processing agricultural products, gas chromatography is often used to determine the residues of organophosphorus, organochlorine, and pyrethroid pesticides. Therefore, equipment capable of extracting solutions from agricultural products is needed to crush, filter, and extract solutions. Especially for agricultural product solutions that cannot be obtained through centrifugation (such as samples containing fiber, large particles, or volatile solvents), filtration is the only way to extract the solution, making successful filtration crucial.

[0003] While existing pesticide residue extraction equipment for agricultural products has the basic function of extracting solutions, it often suffers from several drawbacks. During the extraction process of vegetables, a large amount of vegetable leaf residue remains in the solution. If not cleaned promptly, this residue can hinder filtration and affect the accuracy of test results. Furthermore, some vegetables, such as beans and rapeseed, contain high levels of oil. The oil in the crushed product can easily clog the filter, leading to intermittent or interrupted extraction. This results in the inability to extract a homogeneous solution from all samples, limiting the accuracy of the results. Moreover, when the sample volume is large, the crushed residue tends to accumulate at the bottom, hindering its entry into the filtration zone and causing significant sample waste, further impacting the accuracy of the test results.

[0004] In addition, existing equipment has the problem of difficult-to-clean filters, often requiring the entire equipment to be rinsed at the same time, which is a heavy cleaning task and makes it difficult to ensure that the filters can be thoroughly cleaned.

[0005] Therefore, there is an urgent need to find a simple pretreatment device for pesticide residue detection in vegetable agricultural products containing oils, so as to improve the extraction efficiency of solutions from agricultural products. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a pretreatment device for pesticide residue detection in agricultural products, comprising a crushing component and a collecting component. The collecting component includes an intercepting component, a filter component, and a collecting base arranged sequentially from top to bottom. Each component can be disassembled sequentially for easy cleaning and assembly. A collecting strip is installed inside the crushing component to scrape off samples adhering to the bottom surface, assisting them in entering the filtering and collecting component. This device is particularly suitable for detecting agricultural products containing oily components that are prone to adhesion and difficult to filter. It has a simple structure, is easy to disassemble and clean, and has broad application prospects.

[0007] The present invention provides a pretreatment device for detecting pesticide residues in agricultural products, the device comprising a crushing component and a collecting component that are integrated into a single structure;

[0008] The crushing component is used to crush the agricultural product to be tested, and has a collection bar inside to assist the sample in entering the collection component;

[0009] The collection component includes a filter component and a collection base arranged from top to bottom, used for filtering and collecting the sample to be tested.

[0010] The pesticide residue detection pretreatment device for agricultural products provided by this utility model is specifically suitable for vegetable agricultural products, or some vegetable agricultural products containing oil, such as soybeans and rapeseed. After soybeans and rapeseed are initially crushed, a large amount of vegetable residue is generated, which easily accumulates in the crushing part and is difficult to clean. By setting a collecting strip at the bottom of the crushing part, the accumulated vegetable residue can be effectively scraped up and helped to enter the collecting part.

[0011] In addition, if samples such as soybeans and rapeseed are directly crushed and centrifuged for extraction, the centrifugation process can easily clog centrifuge tubes or damage the rotor due to the presence of coarse fiber and large particles. The centrifuge rotor becomes unbalanced, resulting in a very short lifespan for the device, which is frequently damaged. Furthermore, because these samples contain oily components, the precipitate is not firm, and the supernatant is turbid. Therefore, it is still necessary to choose a suitable filtration method to replace centrifugation.

[0012] Furthermore, the filtering component includes a detachably combined interceptor and filter screen component. After being crushed, the agricultural products pass through the interceptor and filter screen component in sequence and enter the collection base.

[0013] When vegetables are filtered, a large amount of vegetable residue easily clogs the filter, making continuous filtration difficult. This problem can be effectively solved by removing the vegetable residue before filtration. Therefore, an interceptor should be installed above the filter to trap vegetable residue and prevent it from clogging the filter below.

[0014] Furthermore, both the interception component and the filter component are cylindrical structures with an upward opening, and the bottom surface of the cylinder is provided with an interception mesh or a filter mesh.

[0015] Since the interception component and the filter component need to be frequently disassembled and cleaned, the interception component and the filter component provided by this utility model are both designed as cylindrical shapes with the opening facing upwards, so that they can be connected and assembled in sequence, or disassembled and cleaned separately.

[0016] Furthermore, the intercepting component has a large-aperture mesh structure; the filter mesh of the filter component has a smaller pore size than the intercepting component.

[0017] In some cases, it is understandable that the interception components can be set up with multiple layers as needed, because some vegetable residues are easily missed after a single interception and enter the filter screen. Setting up multiple layers of interception can solve this problem well.

[0018] In some methods, the filter components can be multi-layered as needed. For example, the filter components may consist of a first filter component, a second filter component, and a third filter component, which are sequentially and detachably connected. The pore size of the filter screens can decrease sequentially to obtain the desired extraction solution. This is because directly using a small-pore filter screen can easily lead to clogging. By using a filter screen with pore sizes decreasing sequentially, the appropriate filtrate can be intercepted by the appropriate pore size, and the filtrate after initial interception can more easily enter the small-pore filter screen. The first, second, and third filter components are all cylindrical structures with upward openings, and the bottom surface of the cylinder has a filter screen. Each filter component is equivalent to one layer of filter screen. Theoretically, the number of filter components can be two, three, four, etc., depending on the specific situation. Since each filter component is uniformly cylindrical with an upward opening, they can be connected sequentially and can also be easily disassembled for cleaning.

[0019] Furthermore, the upper opening edges of the interception component and the filter component are provided with internal threads, which can be engaged with the external threads at the bottom of the crushing component, the interception component, and the filter component above them, respectively.

[0020] Furthermore, the collection base is an upward-opening cylindrical structure, and the upper opening edge of the collection base is provided with internal threads, which can be engaged with the external threads at the bottom of the filter screen component.

[0021] The shape of the collection base can be the same as that of the filter screen component, but the bottom of the collection base does not have a mesh and is a closed structure used to collect the solution to be tested.

[0022] Furthermore, after the collection base is combined with the interception component, the filter component, the collection base and the crushing component, the device is in a sealed state; the upper side wall of the collection base is connected to the vacuuming device; the filter component is provided with a baffle at the position corresponding to the vacuuming device.

[0023] In some embodiments, the internal threads of the interception component, filter component, and collection base are equipped with washers, and the device is sealed after being assembled into a single unit.

[0024] A baffle is installed at the bottom of the filter component, corresponding to the vacuum position. This not only prevents the collected sample from being sucked away by the vacuum device, but also guides the sample into the collection base.

[0025] Vacuum devices can help speed up the filtration process; however, they are optional and can be used depending on specific needs.

[0026] Furthermore, the crushing component has a cylindrical structure with a stirring paddle in the middle; the bottom surface of the crushing component is equipped with a gate. During the crushing of agricultural products, the gate remains closed. After crushing is completed, the gate opens, and the crushed agricultural products enter the filtering and collecting component.

[0027] In some embodiments, a motor is installed on the crushing component, which drives the agitator to rotate and controls the opening and closing of the gate.

[0028] Furthermore, the collecting strip is provided on the bottom surface of the crushing component to scrape off the sample adhering to the bottom surface and assist it in entering the collecting component.

[0029] Furthermore, the first end of the collecting bar is located at the center of the bottom surface of the crushing component and is fixed, while the second end can move in a circle around the first end; the gate is located at the radius of the bottom surface of the crushing component.

[0030] Since the collecting bar moves in a circle with the center of the bottom surface as the center and the collecting bar as the radius, and the gate is located at the radius of the bottom surface and has a fan-shaped structure, the collecting bar can push all the collected residue into the gate in sequence, preventing any sample from remaining inside the crushed parts.

[0031] The beneficial effects of the agricultural product pesticide residue detection pretreatment device provided by this utility model are as follows:

[0032] 1. An interception component is installed above the filter screen to effectively prevent vegetable residue from clogging the filter screen;

[0033] 2. Both the interception component and the filter component are upward-opening cylindrical structures, which are assembled together in a stacked manner. They can be disassembled one by one for easy cleaning. The appropriate number or pore size of the filter components can also be selected for assembly as needed.

[0034] 3. A collection bar is installed inside the crushing component to scrape the sample adhering to the bottom surface in a circular motion, so that all samples can smoothly enter the filtration and collection component;

[0035] 4. Particularly suitable for testing agricultural products containing oily components that are easy to adhere to and difficult to filter;

[0036] 5. The structure is simple, easy to disassemble and clean, and easy to achieve industrial production. Attached Figure Description

[0037] Figure 1 A schematic diagram of the overall structure of a pretreatment device for pesticide residue detection in agricultural products;

[0038] Figure 2 Exploded view of a pretreatment device for pesticide residue detection in agricultural products (vacuum device omitted);

[0039] Figure 3 A schematic diagram of a pretreatment device for detecting pesticide residues in agricultural products, featuring multi-layered filter components;

[0040] Figure 4 This is a schematic diagram of the structure of the broken component;

[0041] Figure 5 This is a schematic diagram of the interceptor component;

[0042] Figure 6 This is a schematic diagram of the filter screen component.

[0043] Figure 7 This is a structural diagram of the filter component (viewed from bottom to top);

[0044] Figure 8 This is a structural diagram of the collection base. Detailed Implementation

[0045] The preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention and do not limit it in any way. All features disclosed in the embodiments of the present invention, or all steps in all methods or processes disclosed, can be combined in any way except for mutually exclusive features and / or steps.

[0046] Example 1: Pretreatment device for pesticide residue detection in agricultural products

[0047] like Figure 1 As shown, the agricultural product pesticide residue detection pretreatment device 1 provided in this embodiment includes a crushing component 2 and a collecting component 3 assembled into an integrated structure. The crushing component 2 is used to crush the agricultural product to be tested and has a collecting strip 4 inside to assist the sample in entering the collecting component 3. The collecting component 3 includes a filtering component 5 and a collecting base 6 arranged sequentially from top to bottom for filtering and collecting the sample to be tested. The filtering component 5 includes a detachably combined intercepting component 7 and a filter screen component 8. After being crushed, the agricultural product passes through the intercepting component 7 and the filter screen component 8 in sequence and enters the collecting base 6.

[0048] like Figure 2As shown, both the intercepting component 7 and the filter component 8 are upward-opening cylindrical structures, with an intercepting mesh or filter screen on the bottom surface of the cylinder. Since the intercepting component 7 and the filter component 8 need frequent disassembly and cleaning, they are designed as upward-opening cylindrical shapes, allowing for sequential connection and assembly, or sequential disassembly and cleaning. The intercepting component 7 has a large-aperture mesh structure; the filter screen pore size of the filter component 8 is smaller than that of the intercepting component. In some designs, the intercepting component 7 has a large-aperture mesh structure 24 with a pore size of 0.5–5 cm, and the filter component 8 has a filter screen 25 with a pore size of 0.45–850 μm. The intercepting component 7 can also be multi-layered as needed to prevent some vegetable residue from being missed during initial interception. The filter component 8 can also be multi-layered as needed, such as… Figure 3 As shown, the filter assembly 8 includes a first filter assembly 10, a second filter assembly 11, and a third filter assembly 12, which are detachably connected in sequence. The pore size of the filter screens can be progressively smaller to obtain the desired extraction solution. This is because directly using a small-pore filter screen can easily lead to clogging. By using a filter screen with progressively smaller pore sizes, the appropriate filtrate can be intercepted through suitable pore sizes, and the filtrate after initial interception can more easily enter the smaller-pore filter screen. Since each filter assembly 8 has a uniform upward-opening cylindrical structure, they can be connected sequentially and easily disassembled for individual cleaning.

[0049] like Figure 5 and Figure 6 As shown, the upper opening edge 13 and the second upper opening edge 13-2 of the intercepting component 7 and the filter component 8 are respectively provided with internal threads 14 and second internal threads 14-2, which can be engaged with the external threads 16, second external threads 16-2, and third external threads 16-3 of the bottom 15 of the crushing component 2, the intercepting component 7, and the filter component 8 above them, respectively. The collecting base 6 is also an upward-opening cylindrical structure. The third upper opening edge 13-3 of the collecting base 6 is provided with a third internal thread 14-3, which can be engaged with the external thread 16 of the bottom 15 of the filter component 8. The shape of the collecting base 6 can be the same as that of the filter component 8. Figure 8 However, the bottom surface 17 of the collecting base 6 is not equipped with a mesh, forming a closed structure for collecting the solution to be tested. After the collecting base 6 is combined with the interception component 7, the filter component 8, and the crushing component 2, the device is sealed. The upper side wall 18 of the collecting base 6 has an external interface 9 for communication with the vacuum device 19. The filter component 8 has a baffle 32 at the corresponding position to the vacuum device 19. Figure 7The baffle 32 prevents the collected sample from being sucked away by the vacuum device 19 and also acts as a guide, directing the sample into the collection base 6. The interception component 7, the filter component 8, and the internal threads 14, 14-2, and 14-3 of the collection base 6 are each equipped with a washer 33, a second washer 33-2, and a third washer 33-3, respectively. When assembled, the device is sealed. The vacuum device 19 can help accelerate the filtration process; however, the vacuum device 19 can be used or not, depending on specific needs.

[0050] like Figure 4 As shown, the crushing component 2 has a cylindrical structure with a stirring paddle 21 in the middle and blades 35 on the stirring paddle 21. A gate 23 is located on the bottom surface 22 of the crushing component 2. During the crushing process, the gate 23 remains closed. After crushing, the gate 23 opens, and the crushed agricultural product enters the filtering and collecting component 3. A motor 26 is installed on the crushing component 2, which drives the stirring paddle 21 to rotate and controls the opening and closing of the gate 23. A handheld component 34 is installed on the motor 26, making the device easy to hold and suitable for outdoor use. A collecting strip 27 is located on the bottom surface 28 of the crushing component 2, used to scrape off the sample adhering to the bottom surface 28 and assist it in entering the collecting component 3. The first end 29 of the collecting strip 27 is located at the center 30 of the bottom surface of the crushing component 2 and is fixed, while the second end 31 can move in a circle around the first end 29. The gate 23 is located at the radius of the bottom surface of the crushing component 2. Since the collecting bar 27 moves in a circle with the bottom center 30 as the center and the collecting bar 27 as the radius, and the gate 23 is located at the bottom radius, which has a fan-shaped hollow 36 that matches the shape of the valve 23, the gate 23 and the end point 37 of the collecting bar 27 coincide at the center. Then, they move under the control of the motor 26. Therefore, the collecting bar 27 can push all the collected residue into the gate 23 in sequence, preventing any sample from remaining inside the crushing component 2.

[0051] The application of this invention is not limited to this. It can be extended to other applications, such as those related to environmental protection. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this invention; therefore, the scope of protection of this invention should be determined by the scope defined in the claims.

Claims

1. An agricultural product pesticide residue detection pretreatment device, characterized in that, The device comprises a crushing part and a collecting part combined into an integrated structure. The crushing part is used for crushing the agricultural products to be tested, and a collecting strip is arranged in the crushing part to help the sample enter the collecting part. The collecting part comprises a filtering part and a collecting base arranged in sequence from top to bottom, and is used for filtering and collecting the sample to be tested.

2. The agricultural product pesticide residue detection pretreatment device of claim 1, wherein, The filtering part comprises a blocking part and a filter screen part combined detachably, and the agricultural products crushed pass through the blocking part and the filter screen part in sequence and then enter the collecting base.

3. The agricultural product pesticide residue detection pretreatment device of claim 2, wherein, The blocking part and the filter screen part are both in the form of a cylinder with an upward opening, and the lower bottom surface of the cylinder is provided with a blocking screen or a filter screen.

4. The agricultural product pesticide residue detection pretreatment device according to claim 3, characterized in that, The blocking part is in the form of a large-aperture mesh structure, and the filter screen part has a smaller aperture than the blocking part.

5. The agricultural product pesticide residue detection pretreatment device of claim 3, wherein, The upper end opening edge of the blocking part and the filter screen part is provided with an internal thread, which can be combined with an external thread on the bottom of the crushing part, the blocking part and the filter screen part respectively.

6. The agricultural product pesticide residue detection pretreatment device of claim 5, wherein, The collecting base is in the form of a cylinder with an upward opening, and the upper end opening edge of the collecting base is provided with an internal thread, which can be combined with an external thread on the bottom of the filter screen part.

7. The agricultural product pesticide residue detection pretreatment device according to claim 6, characterized in that, The collecting base, the blocking part, the filter screen part and the crushing part are combined to form a sealed state in the device.

8. The agricultural product pesticide residue detection pretreatment device of claim 1, wherein, The upper end side wall of the collecting base is communicated with a vacuum pumping device, and the filtering part is provided with a row of baffles at a position corresponding to the vacuum pumping device.

9. The agricultural product pesticide residue detection pretreatment device of claim 8, wherein, The crushing part is in the form of a cylinder, and a stirring paddle is arranged in the middle of the crushing part.

10. The agricultural product pesticide residue detection pretreatment device according to claim 9, characterized in that, The bottom surface of the crushing part is provided with a gate, which is kept closed during the crushing of the agricultural products, and is opened after the crushing is completed, so that the crushed agricultural products enter the filtering and collecting part. The collecting strip is arranged on the bottom surface of the crushing part, and is used for scraping the sample adhered to the bottom surface and helping the sample enter the collecting part. The first end of the collecting strip is fixed at the center of the bottom surface of the crushing part, and the second end can make a circular motion around the first end. The gate is located at a position with a radius of the bottom surface of the crushing part.

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