Efficient pesticide residue detection device

Abstract

The utility model relates to a high-efficiency pesticide residue detection device which comprises a shell, and a driving part which is arranged on the shell and is detachably arranged at the upper end of the inner wall of the shell, and a crushing head is arranged at the lower end of the driving part; the crushing table is fixedly connected to the inner wall of the shell and is opposite to the crushing head, and a vertically-penetrating liquid leakage hole is formed in the center of the crushing table; a freeze-drying extraction reagent is arranged on the inner wall of the funnel; and a shunting structure and detection test paper. The pesticide residue detection device is compact and reasonable in structure and convenient to operate, realizes field rapid pesticide residue detection of agricultural products through a simple mechanical structure and a freeze-drying extraction reagent, and does not need complex equipment and operation of professionals. The operation process is simplified, and the detection time is shortened; the detection efficiency is improved, and the on-site rapid detection requirement is met; different pesticide components are detected through multiple pieces of detection test paper, so that the detection precision is improved; the device is simple in structure, low in cost and easy to popularize and apply, and effectively improves the quality and safety of agricultural products.

Description

TECHNICAL FIELD

[0001] The utility model relates to pesticide detection technical field, especially high -efficient pesticide residue detection device. BACKGROUND

[0002] In the current agricultural production and circulation link, pesticide residue problem has been concerned. Although the extensive use of pesticides effectively improves the yield and quality of agricultural products, but also brings the safety hazard of pesticide residues. In order to protect the health of consumers, it is particularly important to detect pesticide residues in agricultural products. However, the traditional pesticide residue detection method often has the shortcomings of complex operation, long time consumption, the need for professional equipment and personnel operation, etc., which is difficult to meet the demand of on-site rapid detection.

[0003] Specifically, the traditional pesticide residue detection method usually needs to be carried out in the laboratory, needs to use complex instrument equipment and chemical reagent, and the operation process is complicated, and needs to be operated by personnel after professional training. In addition, the traditional detection method usually needs a long time to obtain the detection result, which is obviously not efficient for the occasion that needs to quickly understand the pesticide residue situation of agricultural products.

[0004] In view of the above problems, some pesticide residue rapid detection devices have appeared in the market, but these devices often have the shortcomings of low detection precision, not simple operation or the need for power support. For example, although some detection devices based on electrochemical principle can realize rapid detection, the sample needs to be pretreated, and the detection precision is easily affected by environmental factors. In addition, although some detection devices based on spectral principle have high detection precision, the equipment is complex and bulky, which is not convenient for on-site use.

[0005] In summary, the present application aims to provide a simple, rapid and power-free agricultural pesticide residue detection device to solve the problems of complex operation, long time consumption, the need for professional equipment and personnel operation in the prior art, meet the demand of on-site rapid detection, and improve the quality and safety of agricultural products.

[0006] Therefore, we propose a high-efficiency pesticide residue detection device. UTILITY MODEL CONTENT

[0007] The applicant provides a high-efficiency pesticide residue detection device to solve the problems of complex operation, long time consumption, the need for professional equipment and personnel operation in the prior art, meet the demand of on-site rapid detection, and improve the quality and safety of agricultural products.

[0008] The technical scheme adopted by the utility model is as follows:

[0009] The high-efficiency pesticide residue detection device comprises a shell and a shell, and the shell comprises:

[0010] a driving part detachably arranged on the upper end of the inner wall of the shell, and a crushing head arranged on the lower end of the driving part;

[0011] a crushing platform fixedly connected to the inner wall of the shell and arranged opposite to the crushing head, and a vertical liquid leakage hole arranged at the center of the crushing platform;

[0012] a funnel arranged upside down on the lower end of the shell, with the narrow side of the funnel opposite to the liquid leakage hole, and a freeze-dried extraction reagent arranged on the inner wall of the funnel;

[0013] a flow distribution structure in a conical structure and arranged on the inner side of the narrow side of the funnel, and the flow distribution structure passing through the narrow side of the funnel and extending into the liquid leakage hole;

[0014] and,

[0015] a test paper arranged on the inner wall of the shell and at the lower end of the first groove, used for receiving the test mixed solution and judging the pesticide residue content by observing the color change.

[0016] It is further characterized in that:

[0017] the shell is a hollow cylindrical structure with an open upper end.

[0018] the driving part comprises, from top to bottom, a:

[0019] a hand-held part, with anti-slip patterns arranged on the outer wall thereof;

[0020] a threaded part corresponding to the threaded groove arranged on the inner wall of the shell and providing a downward pressure by rotation;

[0021] and,

[0022] a crushing head with a convex lower end surface.

[0023] the side opposite to the crushing platform of the crushing head is provided with annularly distributed crushing teeth, and the center of the upper end surface of the crushing platform is concave.

[0024] a filter screen is arranged in the liquid leakage hole for filtering out residues.

[0025] the funnel and the flow distribution structure are provided with mutually abutting grooves, and the freeze-dried extraction reagent is arranged in the first groove arranged on the funnel.

[0026] the number of test papers is multiple, and each test paper contains different test reagents for detecting different pesticide components.

[0027] a spring is further included, arranged on the stepped groove arranged on the upper end of the shell, and the spring is opposite to the driving part for providing elastic pre-tightening force.

[0028] A bottom cover is detachably connected to the lower end of the shell to close the lower end opening of the shell.

[0029] An observation port corresponding to the test paper is formed in the side wall of the shell, and a transparent glass is installed on the observation port.

[0030] The utility model has the advantages of compact structure, reasonable design, convenient operation, and on-site rapid pesticide residue detection of agricultural products through simple mechanical structure and freeze-dried reagent, without the need for complex equipment and professional operation.

[0031] The utility model has the advantages of simplified operation process, shortened detection time, improved detection efficiency, meeting the demand of on-site rapid detection, without the need for power support, convenient to carry and use, improved detection precision through detection of different pesticide components by multiple test papers, simple structure, low cost, easy to popularize and apply, effectively improved agricultural product quality and safety, and protection of consumer health.

[0032] Meanwhile, the utility model also has the following advantages:

[0033] The embodiment integrates the dispersed sample processing, reagent mixing, reaction detection and other steps in traditional pesticide residue detection into a continuous operation process in a single device through the modular integrated design of the shell, the driving part, the crushing table, the funnel and the shunt structure.

[0034] The embodiment solves the problems of uneven mixing and reagent loss in the rapid detection device through the synergistic effect of the multi-stage groove structure and the freeze-dried reagent. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 The utility model is a structural schematic view.

[0036] Figure 2 The utility model is a sectional view.

[0037] Figure 3 The utility model is a connection state schematic view of the driving part and the crushing table.

[0038] Figure 4 The utility model is a connection state schematic view of the funnel and the shunt structure.

[0039] Among them:

[0040] 100, shell; 200, driving part; 300, bottom cover; 400, observation port; 500, crushing table; 600, funnel; 700, shunt structure; 800, test paper; 900, spring;

[0041] 201, crushing head; 202, threaded part; 203, hand-held part; 201, crushing head; 202, threaded part; 203, hand-held part;

[0042] 501, fixed part; 502, liquid leakage hole; 503, crushing teeth; 601, first groove; 701, second groove. DETAILED DESCRIPTION

[0043] The specific embodiments of the utility model will be described below in conjunction with the drawings.

[0044] As Figures 1-4 shown, the embodiment discloses a high-efficiency pesticide residue detection device, which is mainly composed of a shell 100, a driving part 200, a bottom cover 300, an observation port 400, a crushing table 500, a funnel 600, a shunt structure 700, a detection test paper 800, a spring 900 and the like, and is suitable for on-site rapid detection.

[0045] Specifically, the shell 100 in the embodiment is in a whole cylindrical shape, and an observation port 400 corresponding to the detection test paper 800 is formed in the side wall. A transparent glass is installed on the observation port 400, so as to observe the color change of the detection test paper 800. The upper and lower ends of the shell 100 are in an open structure, facilitating the installation and dismounting of other components. A stepped groove is arranged on the inner wall of the shell 100 at the upper end, for fixing the driving part 200 and also improving the sealing effect inside.

[0046] As Figure 3 shown, the driving part 200 in the embodiment is detachably arranged on the inner wall of the shell 100 at the upper end. The driving part 200 is sequentially provided with a handheld part 203, a threaded part 202 and a crushing head 201 from top to bottom, and the three are integrally formed. Anti-skid lines are arranged on the outer wall of the handheld part 203, facilitating rotation. The threaded part 202 corresponds to a threaded groove on the inner wall of the shell 100, and provides downward extrusion force and shearing force through rotation. The lower end of the crushing head 201 is provided with crushing teeth 503 for crushing agricultural products.

[0047] As Figure 2 and Figure 3 shown, the crushing table 500 in the embodiment is fixedly connected to the inner wall of the shell 100. The crushing table 500 cooperates with the crushing head 201 to realize the crushing effect on the agricultural crops to be measured. The upper end of the crushing table 500 is provided with crushing teeth 503 corresponding to the crushing head 201, and the crushing teeth 503 on the crushing table 500 and the crushing head 201 are in tooth engagement, so that the crushing effect is improved through the engagement of the two groups of crushing teeth 503. The center of the upper end face of the crushing table 500 is concave, and the center of the lower end face of the crushing head 201 is convex downward and is in engagement with the crushing table 500, further improving the crushing effect and facilitating the subsequent flow of juice. The center of the crushing table 500 is provided with a through liquid leakage hole 502, and the juice of the agricultural crops to be measured flows into the funnel 600 through the liquid leakage hole 502. A filter screen is arranged in the liquid leakage hole 502, for filtering out residues.

[0048] As Figure 2And Figure 4 As shown in the figure, the funnel 600 and the flow distribution structure 700 in the embodiment are used in combination to achieve the flow distribution of the juice and the sufficient contact with the extraction reagent. Specifically, the funnel 600 in the embodiment is set upside down, and the narrow opening is connected to the liquid leakage hole 502. The inner side of the narrow opening of the funnel 600 is provided with the flow distribution structure 700, which is conical and fits on the inner wall of the funnel 600 and extends into the liquid leakage hole 502, for uniformly distributing the juice. A plurality of first grooves 601 distributed in a straight line are arranged between the narrow opening side and the wide opening side of the inner wall of the funnel 600, which are arranged to allow the juice to flow out in a certain direction and improve the contact between the juice and the surface of the first grooves 601, thereby improving the tension of the juice and avoiding the juice from falling vertically, so that the juice moves along the direction of the first grooves 601. The freeze-dried extraction reagent is placed in the first grooves 601, and the juice of the crop to be tested can be mixed with the extraction reagent before being detected by the detection test paper 800 to detect the pesticide components, thereby providing a basis for subsequent detection. The freeze-dried extraction reagent in the embodiment has hydrophilicity, which facilitates the mixing with the juice. In order to ensure that the juice can move along the direction of the first grooves 601, the opening of the first grooves 601 is treated by narrowing, that is, the distance of the opening of the first grooves 601 is less than the maximum width of the first grooves 601, and the inclination angle of the inner wall of the funnel 600 is greater than 45°. In summary, the capillary effect is formed by the groove narrowing treatment (opening width < maximum groove width) in the embodiment, so that the juice flows stably in the inner wall of the funnel 600, and the vertical falling of the liquid droplets is avoided to cause uneven mixing of the reagent.

[0049] Meanwhile, the flow distribution structure 700 in the embodiment is arranged on the inner side of the narrow opening of the funnel 600, which is conical and fits on the inner wall of the funnel 600 and extends into the liquid leakage hole 502. The flow distribution structure 700 is provided with a plurality of second grooves 701 corresponding to the first grooves 601, which facilitate the juice to enter the first grooves 601 along the second grooves 701.

[0050] The number of the detection test papers 800 in the embodiment is multiple, which are attached to the inner wall of the shell 100 and arranged at the lower end of the first grooves 601. After receiving the test mixed liquid, the detection test papers 800 contact with the test reagent, and the content of the pesticide residues is determined by observing the color change of the test paper. The multiple detection test papers 800 contain different test reagents for detecting different pesticide components.

[0051] In the embodiment, the bottom cover 300 is also included, which is detachably connected to the lower end of the shell 100 to close the opening of the lower end of the shell 100 and prevent the juice from leaking. By opening the bottom cover 300, the detection test papers 800 can be replaced, and the extraction reagent on the funnel 600 can also be supplemented. The injection of clean water and disinfectant from the lower end of the shell 100 can clean and disinfect the whole device, especially the filter screen, which facilitates the continuous use.

[0052] The observation port 400 in the embodiment is arranged on the side wall of the shell 100, corresponding to the test paper 800, for observing the color change of the test paper 800. A transparent glass is installed on the observation port 400 to ensure the accuracy of observation.

[0053] The embodiment also includes a spring 900 arranged on the stepped groove arranged on the upper end of the shell 100, and the spring 900 is opposite to the driving part 200, for providing elastic pre-tightening force. The spring 900 in the embodiment adopts a wave spring, which can improve the pre-tightening force and also reduce the space.

[0054] The specific operation process and working principle are as follows:

[0055] First, the crushing table 500 is fixedly connected to the inner wall of the shell 100 to ensure that the crushing teeth 503 are correctly corresponded. Then, the funnel 600 is arranged upside down at the lower end of the shell 100, the narrow opening is butted against the liquid leakage hole 502, and the shunt structure 700 is ensured to be correctly attached to the inner wall of the funnel 600. Then, a plurality of first grooves 601 arranged in a straight line are arranged between the narrow opening side and the wide opening side of the inner wall of the funnel 600, and the freeze-dried extraction reagent acetonitrile + buffer salt composite powder is placed in the first grooves 601. Then, the test paper 800 is attached to the inner wall of the shell 100 and arranged at the lower end of the first grooves 601. Finally, the driving part 200 is installed at the upper end of the shell 100, the threaded part 202 corresponds to the threaded groove on the inner wall of the shell 100, and the hand-held part 203 is exposed outside the shell 100. The bottom cover 300 is detachably connected to the lower end of the shell 100.

[0056] The part structure of the agricultural product to be detected, such as leaves, fruits, etc., is cleaned and the surface impurities are removed. Then, the agricultural product is put on the crushing table 500 in the shell 100. The driving part 200 is covered, the handheld part 203 is rotated, the threaded part 202 corresponds to the threaded groove on the inner wall of the shell 100, and the downward extrusion force and shear force are provided. The lower end of the crushing head 201 is provided with crushing teeth 503, which are engaged with the crushing teeth 503 on the crushing table 500, so as to crush the agricultural product and generate juice. The juice passes through the liquid leakage hole 502 on the crushing table 500, a filter screen is arranged in the liquid leakage hole 502, and the residue is filtered out. The juice flows into the hopper 600 through the liquid leakage hole 502, and the shunt structure 700 uniformly shunts the juice. The juice enters the first groove 601 along the second groove 701 on the shunt structure 700, contacts the freeze-dried extraction reagent acetonitrile + buffer salt composite powder in the first groove 601, and forms a test mixed solution. The test mixed solution flows into the test paper 800 through the first groove 601, and contacts the test reagent on the test paper. A plurality of test papers 800 contain different test reagents for detecting different pesticide components. The color change of the test paper 800 is observed through the observation port 400, and then the built-in colorimetric card is compared to determine whether the residue is overproof. According to the color change of the test paper 800, combined with the built-in colorimetric card, it is determined whether the pesticide residue in the agricultural product is overproof. If the color change of the test paper exceeds the standard range on the colorimetric card, it means that the pesticide residue in the agricultural product is overproof; if the color change of the test paper is within the standard range, it means that the pesticide residue in the agricultural product is not overproof.

[0057] The embodiment integrates the sample processing, reagent mixing, reaction detection and other steps in the traditional pesticide residue detection into a continuous operation process in a single device through the modular integrated design of the shell, the driving part, the crushing table, the funnel and the flow splitting structure. Specifically, the cooperation of the threaded part 202 of the driving part 200 and the threaded groove on the inner wall of the shell 100 enables the user to complete the mechanical crushing and juice extraction of the agricultural products simultaneously by rotating the handheld part 203, without the need for additional tools or complex operations. The tooth-shaped engagement structure (crushing teeth 503) of the crushing head 201 and the crushing table 500 can crush the sample such as leaves or fruits into a pulp with a particle size of less than 1 mm within 30 seconds through the synergistic effect of shear force and extrusion force, significantly shortening the pretreatment time. The inverted installation of the funnel 600 and the tapered guide design of the flow splitting structure 700 ensure that the juice can quickly enter the first groove 601 along the second groove 701 after passing through the liquid leakage hole 502 and fully contact with the freeze-dried extraction reagent (acetonitrile + buffer salt composite powder). This liquid flow path design guided by the physical structure not only eliminates the step of manually adding reagents in the traditional method, but also forms a capillary effect through groove closing processing (opening width < maximum groove width), so that the juice flows stably on the inclined 45° inner wall of the funnel, avoiding the vertical dropping of liquid drops leading to uneven mixing of reagents. Finally, the multiple parallel settings of the test paper 800 (such as organic phosphorus and carbamate special test paper) can simultaneously complete the detection of multiple types of pesticide residues, and the entire process takes no more than 5 minutes, which is more than 80% more efficient than laboratory detection.

[0058] The embodiment solves the problems of uneven mixing and reagent loss in the rapid detection device through the synergistic effect of the multi-stage groove structure and the freeze-dried reagent. The linear distribution and closing design of the first groove 601 form a directional flow guide channel, which uses the dual action of liquid surface tension (through the hydrophilic treatment with a contact angle < 50°) and gravity to make the juice spread stably at a flow rate of 0.5-1.2 mL / s, ensuring that the contact area with the freeze-dried reagent reaches more than 90%. The freeze-dried extraction reagent is immobilized in the groove in the form of microporous adsorption, and its hydrophilic porous structure (pore size 5-20 μm) can quickly absorb the juice and release acetonitrile (extractant) and buffer salt (pH regulator) to form a homogeneous test mixture. The precise alignment design of the second groove 701 of the flow splitting structure 700 and the first groove 601 further divides the liquid flow into multiple parallel branches, avoiding cross contamination. By corresponding the test paper attachment angle with the groove outlet, the mixture covers the detection area in the form of laminar flow, improving the detection effect.

[0059] The embodiment discards the power module required by electrochemical or spectral detection, realizes the detection function through cooperation of a pure mechanical structure and biochemical reagents, and significantly widens the application scenarios of the device. The waveform spring pre-tightening design of the driving part 200 can prevent sealing failure caused by thread loosening, and can compensate the machining tolerance through elastic deformation, so as to ensure stable pressure in the crushing process. The "one press and one rotation" can complete the test paper replacement or funnel reagent supplement, and the operation has high fault tolerance, so even non-professionals can complete the maintenance within 2 minutes. The observation port 400 is used for quickly checking the test result. More importantly, all the liquid-contacting components (the crushing table, the funnel and the shunt structure) of the device can be disassembled and cleaned by injecting clean water / ethanol from the lower end, and the freeze-dried reagents have a storage stability of more than 3 years at room temperature, so that a single device can be repeatedly used for multiple times.

[0060] The pesticide residue detection device has the advantages of simple structure, convenient operation, no need for power or complex operation, etc. The agricultural products are crushed and juice is generated by manual rotation and extrusion, the juice is filtered, shunted and mixed, and then contacts with the test paper, and the pesticide residue content is determined by observing the color change of the test paper. The device can output more than three pesticide residue results within 5 minutes, and is suitable for on-site rapid detection. Meanwhile, the device also has the advantages of low cost, easy popularization, etc., and has high practical value and application prospect.

[0061] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. A high-performance pesticide residue detection device, characterized by, The device comprises a shell, and a driving part arranged on the inner wall of the shell, a crushing head arranged on the lower end of the driving part, a crushing platform arranged on the inner wall of the shell and opposite to the crushing head, a funnel arranged on the lower end of the shell, a filter screen arranged in the liquid leakage hole of the crushing platform, and a test paper arranged on the inner wall of the shell and opposite to the lower end of the first groove. The shell is a hollow cylindrical structure with an open upper end. The driving part comprises a handheld part, a threaded part, and a crushing head arranged in sequence from top to bottom. The handheld part is provided with anti-skid lines on the outer wall. The threaded part is provided with a threaded groove on the inner wall of the shell. The crushing head is provided with a protrusion on the lower end surface.

2. The pesticide residue detection device according to claim 1, characterized by The crushing head and the crushing platform are provided with crushing teeth arranged in a ring shape on the opposite side.

3. The pesticide residue detection device according to claim 1, characterized by The upper end surface of the crushing platform is concave in the center. The filter screen is arranged in the liquid leakage hole. The funnel and the flow distribution structure are provided with grooves arranged opposite to each other. The test paper is provided with different test reagents for detecting different pesticide components. The device further comprises a spring arranged on the step groove of the upper end of the shell and opposite to the driving part.

4. The pesticide residue detection device according to claim 1, characterized by The device further comprises a bottom cover detachably connected to the lower end of the shell.

5. The pesticide residue detection device according to claim 1, wherein The side wall of the shell is provided with an observation port corresponding to the test paper.

6. The pesticide residue detection device according to claim 1, wherein The observation port is provided with a transparent glass.

7. The pesticide residue detection device according to claim 1, wherein ​ 8. The pesticide residue detection device according to claim 1, wherein ​ 9. The pesticide residue detection device according to claim 1, wherein ​ 10. The pesticide residue detection device according to any one of claims 1 to 9, characterized by, ​

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