Equipment for rapidly detecting safety of grains and detection method

Abstract

The invention relates to the technical field of grain safety, and particularly discloses equipment for rapidly detecting grain safety and a detection method.The equipment comprises a detection box, one side of the detection box penetrates through and is rotationally connected with a sealing cover, the bottom of the sealing cover is fixedly connected with a sealing ring, and a sealing groove is formed in the bottom of the inner wall of the detection box; a dustproof cover is fixedly connected to one side of the sealing cover, an annular dustproof plate is fixedly connected to one side of the detection box, a detector penetrates through and is fixedly connected to the part, located in the annular dustproof plate, of one side of the detection box, and a pretreatment device is fixedly connected to the bottom of the inner wall of the first placement groove; according to the equipment for rapidly detecting the safety of the grains and the detection method, a sample can be dried and the temperature can be kept at the optimal detection temperature through the air blowing mechanism in the pretreatment device, and dust and other impurities in the grains can be removed through the impurity removal mechanism in the pretreatment device, so that the influence on the detection result is avoided.

Description

Technical Field

[0001] This invention relates to the field of food security technology, specifically to a device and method for rapidly detecting the safety of grains and cereals. Background Technology

[0002] As a core agricultural product upon which humankind depends for survival, the safety of grains directly relates to national health, social stability, and national food security. With global population growth, the development of large-scale agricultural planting, and increasingly frequent grain trade, grains face multiple safety risk factors throughout the entire industrial chain, including production, processing, storage, transportation, and sales. Establishing an efficient and convenient grain safety testing system has become one of the core requirements for modern agricultural development and food safety supervision. In the grain production process, the use of agricultural inputs such as pesticides and fertilizers is widespread in order to ensure yield and control pests and diseases. Improper use can easily lead to excessive pesticide residues.

[0003] Chinese patent CN103439499B discloses a complete set of equipment and testing methods for rapid on-site detection of grain safety, which can achieve the effect of rapid on-site screening of grain safety. However, it cannot achieve the effect of proper pretreatment of grain, which may affect the accuracy of the test results due to impurities such as fine dust or grain moisture. Summary of the Invention

[0004] To solve the above technical problems, the present invention is implemented through the following technical solution: a device and method for rapidly detecting the safety of grains and cereals, comprising a detection box, a sealing cover rotatably connected to one side of the detection box, a sealing ring fixedly connected to the bottom of the sealing cover, a sealing groove formed at the bottom of the inner wall of the detection box, a dust cover fixedly connected to one side of the sealing cover, an annular dustproof plate fixedly connected to one side of the detection box, a detector rotatably connected to the portion of one side of the detection box located inside the annular dustproof plate, a display screen rotatably connected to one side of the detection box, a tool drawer rotatably connected to one side of the detection box, and a first placement groove and a second placement groove respectively formed at the bottom of the inner wall of the detection box, the bottom of the inner wall of the detection box located in the second placement groove. A vortex centrifuge is fixedly connected to one side of the first placement tank. The vortex centrifuge contains centrifuge tubes. A pretreatment device is fixedly connected to the bottom of the inner wall of the first placement tank. The pretreatment device includes a particle size observation box. A partition is fixedly connected to the bottom of the inner wall of the particle size observation box. A first sieving hole and a second sieving hole are respectively opened on the bottom of the inner wall of the particle size observation box on both sides of the partition. The diameter of the first sieving hole is smaller than that of the second sieving hole. A blower mechanism is fixedly connected to the inner wall of the particle size observation box near the second sieving hole. A purification mechanism is fixedly connected to the inner wall of the particle size observation box near the first sieving hole. An industrial camera is fixedly connected to one side of the inner wall of the particle size observation box. A grinding box is fixedly connected to the bottom of the particle size observation box.

[0005] Preferably, the tool drawer is equipped with a sampler, a rapid test card box, and a dropper, and the rapid test card box is equipped with an ochratoxin A test card, a zearalenone test card, and a vomitoxin test card.

[0006] Preferably, the blower mechanism includes a blower box, with blower pipes uniformly connected to one side of the blower box, and heating wires uniformly fixedly connected to the inner wall of the blower box. The side of the blower box away from the blower pipe is connected to the air outlet of an induced draft fan. The blower box penetrates one side of the inner wall of the particle size observation box and is fixedly connected to the particle size observation box. A sampler takes g of sample from each of the top, middle, and bottom layers of the grain pile, mixes them, and then reduces the sample size by quartering to g, which is then placed into the particle size observation box. The induced draft fan is started. If the grain temperature is too high, the blower box outputs room temperature air to cool the grain. If the grain is low temperature or damp, the heating wires are activated to heat the air inside the blower box. The hot air is evenly blown onto the grain to dry and heat it up, so that the grain is in the best detection state. During the blowing process, small grain particles are blown toward the first screening hole on one side of the partition, and large grain particles fall into the second screening hole below due to gravity. The particle size distribution of the falling grain is observed by an industrial camera.

[0007] Preferably, the impurity removal mechanism includes an impurity removal box, a collection nozzle connected to one side of the impurity removal box, a first filter plate fixedly connected to the inner wall of the collection nozzle, first filter holes evenly distributed on the side of the first filter plate, a movable groove evenly distributed on one side of the inner wall of the impurity removal box, a spring fixedly connected to one side of the inner wall of the movable groove, baffles fixedly connected to both sides of the inner wall of the impurity removal box, a second filter plate fixedly connected to the end of the spring away from the movable groove, second filter holes evenly distributed on the top of the second filter plate, and the bottom of the second filter plate slidably connected to the top of the baffle. The side section below the second filter plate is connected to the air inlet of the negative pressure fan. During the blowing process, fine impurities such as dust in the grain are lifted by the airflow. The negative pressure fan is activated to create negative pressure in the impurity removal box. Impurities are sucked into the impurity removal box through the collection nozzle. The airflow first passes through the first filter plate, where the first filter holes intercept grain particles to prevent them from entering the impurity removal box and causing waste. The airflow continues to pass through the second filter plate, where the second filter holes trap fine dust and impurities to prevent them from entering the negative pressure fan and causing equipment damage. The filtered clean airflow is discharged from the air outlet of the negative pressure fan, and the impurities remain in the impurity removal box and are cleaned regularly.

[0008] Preferably, a sliding opening is provided on one side of the impurity removal box, the inner wall of the sliding opening is slidably connected to the side of the second filter plate, a limiting groove is provided on one side of the inner wall of the sliding opening, a limiting stop rod is slidably connected through the inner wall of the sliding opening away from the limiting groove, a limiting rod is fixedly connected to one end of the limiting stop rod near the limiting groove, a first mounting plate and a pull plate are fixedly connected to one end of the limiting stop rod away from the limiting rod, a second mounting plate is fixedly connected to one side of the impurity removal box, a threaded fixing rod is threadedly connected through the top of the second mounting plate, a knob is fixedly connected to the top of the threaded fixing rod, and the bottom of the threaded fixing rod passes through the first mounting plate and is threadedly connected to the first mounting plate.

[0009] Preferably, the impurity removal box is fixedly connected to one side of the particle size observation box, and the impurity collection nozzle passes through the particle size observation box and is fixedly connected to the particle size observation box. The diameter of the first filter hole is larger than the diameter of the second filter hole, and the diameter of the first filter hole is smaller than the diameter of the first screening hole. When replacing the second filter plate, rotating the knob drives the threaded fixing rod to move upward until it is disengaged from the first mounting plate, releasing the fixation of the limiting stop rod. Pulling the pull plate drives the limiting stop rod and the limiting rod to move, causing the limiting rod to disengage from the limiting groove. The second filter plate pops out under the action of the spring and is pulled out from the sliding port to complete the disassembly. When installing a new filter plate, insert it into the impurity removal box along the sliding port, so that the bottom of the filter plate is slidably connected to the baffle. Pushing the pull plate allows the limiting rod to be inserted into the limiting groove to complete the initial limiting. Rotating the knob in the opposite direction moves the threaded fixing rod downward and connects it with the first mounting plate, fixing the limiting stop rod, and thus firmly installing the second filter plate.

[0010] Preferably, grinding rollers are rotatably connected to both sides of the inner wall of the grinding box, a material conveying channel is fixedly connected to the bottom side of the grinding box, a material conveying nozzle is connected to the bottom of the material conveying channel, a material conveying plate is slidably connected to both bottom sides of the grinding box, a material receiving port is opened at the top of the material conveying plate, the material conveying plate extends into the material conveying channel and is slidably connected to the inner wall of the material conveying channel, the movable end of an electric telescopic rod is fixedly connected to the side of the material conveying plate away from the material conveying channel, two sets of electric telescopic rods are provided and symmetrically distributed on one side of the material conveying plate, and the fixed end of the electric telescopic rod is fixedly connected to the bottom of the inner wall of the second placement groove.

[0011] Preferably, a multi-station turntable is rotatably connected to the bottom of the inner wall of the second placement tank. A weighing device is uniformly fixedly connected to the top of the multi-station turntable, and a sampling bottle is fixedly connected to the top of the weighing device. A third placement tank is opened on both sides of the inner wall of the second placement tank. An extraction liquid tank is fixedly connected to the bottom of the inner wall of the third placement tank. The inlet of a metering pump is connected to one side of the extraction liquid tank, and a drip pipe is connected to the outlet of the metering pump. The sieved grains fall into the grinding box. The grinding roller is started to grind the grains into fine powder. The powder falls into the receiving port of the conveying plate. When adding samples, the electric telescopic rod is started to push the conveying plate into the conveying channel until the receiving port is aligned with the conveying nozzle. The powder falls into the sampling bottle through the conveying nozzle for weighing. After weighing, the multi-station turntable is started to rotate the sampling bottle to the bottom of the extraction liquid tank corresponding to the testing requirements. The metering pump is started, and the extraction liquid in the extraction liquid tank is quantitatively dripped into the sampling bottle through the drip pipe.

[0012] A detection method for a device used for rapid detection of food and grain safety.

[0013] S1: Before conducting the test, read the instruction manual, then open the tool drawer, take out the sampler, and use the sampler to take 20g from the top, middle and bottom of the grain pile respectively. After mixing, use the quartering method to reduce the sample to 8g as the test sample.

[0014] S2: After sampling, the sample is placed in a pretreatment device for pretreatment operations such as impurity removal, and the sample is then crushed.

[0015] S3: The crushed sample is conveyed to the sampling bottle through the feed nozzle of the feed channel. 5g of the crushed sample is weighed by the weigher. The multi-station turntable can meet a variety of testing needs.

[0016] S4: After weighing 5g of the pulverized sample, rotate the multi-station turntable to the bottom of the corresponding extraction tank according to the detection requirements, and then add 15ml of extraction liquid quantitatively through the metering pump.

[0017] S5: After adding 15 ml of extraction solution, take out the sampling bottle and place it on a vortex centrifuge for centrifugation. After centrifugation, take out the corresponding test card from the rapid test card box according to the testing requirements, tear off the outer packaging, and then take out the dropper to take out 100 μL of supernatant and 1 ml of diluent from the centrifuged sample solution. Then drop 75 μL into the sample well of the test card.

[0018] S6: Place the test card into the tester, then cover it with the sealing cover, ensuring the sealing ring aligns with the sealing groove, and place the dust cover on the annular dustproof plate to create a sealed and dustproof environment during testing. Observe the results through the display screen.

[0019] Preferably, during pretreatment, the particle size can be observed using an industrial camera, the sample can be dried using a blower mechanism, and impurities such as dust in the sample can be removed using a cleaning mechanism.

[0020] This invention provides an apparatus and method for rapidly detecting the safety of grains and cereals. It offers the following advantages:

[0021] 1. This equipment and method for rapid detection of grain safety employs a scientific sampling approach using stratified sampling and quartering. 20g samples are taken from each of the top, middle, and bottom layers of the grain pile, mixed, and then reduced to 8g. Compared to traditional random single-point sampling, this ensures sample coverage of different areas of the grain pile, improving representativeness and avoiding distorted test results due to uneven sampling. A constant-temperature pretreatment system is constructed using a blower and heating wire, which can be dynamically adjusted according to the actual temperature of the grain. At high temperatures, airflow is used to cool the grain, preventing grain deformation and moisture loss that could affect particle size detection. At low temperatures and when the grain is damp, heating is used to dry it, preventing grain adhesion and ensuring optimal sieving. The pretreated grain is in optimal testing condition. Simultaneously, airflow sieving can preliminarily separate grains of different sizes, and an industrial camera visually captures the particle size distribution, providing operators with a visual reference.

[0022] 2. This equipment and method for rapid detection of grain safety utilizes a combination of methods. Dust, debris, and other fine impurities generated during the airflow process are efficiently removed through negative pressure adsorption and dual filtration. A stable negative pressure is created within the impurity removal chamber by the negative pressure fan, preventing dust from polluting the testing environment or adhering to the grain surface and affecting subsequent testing. The first filter plate precisely intercepts grain particles, preventing sample loss, while the second filter plate further traps fine impurities, preventing them from entering the negative pressure fan and causing equipment wear. This ensures smooth airflow, maintains a stable impurity removal effect, provides a pure sample for subsequent accurate testing, and avoids deviations in test results caused by impurities.

[0023] 3. This equipment and method for rapid detection of grain safety features a second filter plate with a threaded fixing and spring-loaded quick-release structure. This solves the problems of cumbersome, time-consuming, and labor-intensive replacement and disassembly of traditional filter plates. Rotating the knob releases the threaded fixing rod's limit, and pulling the pull plate disengages the limit rod from the limit groove. The second filter plate then automatically pops out under the spring force. The entire disassembly process requires no professional tools and is quick. During installation, simply inserting the new filter plate and reversing the operation completes the fixation. The convenient replacement design allows operators to regularly clean or replace the filter plates, maintaining the continuous and effective filtration of the impurity removal mechanism and preventing a decrease in impurity removal efficiency due to filter plate clogging or damage, further ensuring the accuracy of subsequent testing results.

[0024] 4. This equipment and method for rapid detection of grain safety automates sample processing through automatic grinding and precise sample addition. The grinding roller grinds the sieved grain into a uniform powder, ensuring sufficient dissolution of components during subsequent extraction. An electric telescopic rod drives the feeding plate for precise feeding, and a metering pump adds extract solution quantitatively, solving the problems of large dosage deviation and liquid wastage caused by traditional manual sample addition. The multi-station turntable can automatically transfer the sampling bottle to the corresponding extract tank, adapting to multiple testing needs, improving the flexibility and adaptability of the equipment, increasing testing efficiency, reducing manual intervention, avoiding human contamination of samples, and ensuring accurate and reliable final test data. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the device structure for rapid detection of grain safety according to the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the tool drawer of the present invention;

[0027] Figure 3 This is a schematic diagram of the pretreatment device structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal structure of the particle size observation box of the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the blower mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the impurity removal mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of one side of the impurity removal mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the impurity removal mechanism of the present invention;

[0033] Figure 9 This is a schematic diagram of the limiting groove connection structure of the present invention;

[0034] Figure 10 This is an enlarged structural diagram of point A in the present invention;

[0035] Figure 11 This is a schematic diagram of the connection structure of the grinding box of the present invention;

[0036] Figure 12 This is a schematic diagram of the internal connection structure of the second placement slot of the present invention.

[0037] Figure 13 This is a schematic diagram of the process structure of the present invention.

[0038] In the diagram: 1. Testing box; 2. Sealing cover; 3. Sealing ring; 4. Sealing groove; 5. Dust cover; 6. Annular dustproof plate; 7. Detector; 8. Display screen; 9. Tool drawer; 10. First placement slot; 11. Second placement slot; 12. Vortex centrifuge; 13. Centrifuge tube; 14. Pretreatment device; 141. Particle size observation box; 142. Partition plate; 143. First sieve hole; 144. Second sieve hole; 145. Blowering mechanism; 146. Impurity removal mechanism; 147. Industrial camera; 148. Grinding box; 91. Sampler; 92. Rapid testing card box; 93. Dropper; 1451. Air box; 1452. Air duct; 1453. Heating wire; 1454. Exhaust fan; 1461. Impurity removal box; 1462. Impurity collection nozzle; 1463. First filter plate; 1464. First filter hole 1465. Movable groove; 1466. Spring; 1467. Baffle; 1468. Second filter plate; 1469. Second filter hole; 14610. Negative pressure fan; 14611. Sliding port; 14612. Limiting groove; 14613. Limiting stop bar; 14614. Limiting bar; 14615. First mounting plate; 14616. Pull plate; 14617. Second mounting plate; 1461 8. Threaded fixing rod; 14619. Knob; 1481. Grinding roller; 1482. Material conveying channel; 1483. Material conveying nozzle; 1484. Material conveying plate; 1485. Material receiving port; 1486. ​​Electric telescopic rod; 111. Multi-station turntable; 112. Weighing device; 113. Sampling bottle; 114. Third placement tank; 115. Extraction liquid tank; 116. Metering pump; 117. Dropping tube. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] For the first embodiment, please refer to... Figures 1-5This invention provides a technical solution: a device for rapidly detecting the safety of grains, comprising a detection box 1, a sealing cover 2 rotatably connected to one side of the detection box 1, a sealing ring 3 fixedly connected to the bottom of the sealing cover 2, a sealing groove 4 formed at the bottom of the inner wall of the detection box 1, a dust cover 5 fixedly connected to one side of the sealing cover 2, an annular dustproof plate 6 fixedly connected to one side of the detection box 1, a detector 7 puncturing and fixedly connected to the portion of one side of the detection box 1 located inside the annular dustproof plate 6, a display screen 8 puncturing and fixedly connected to one side of the detection box 1, and a sliding connection... A tool drawer 9 is provided. The bottom of the inner wall of the testing box 1 has a first placement slot 10 and a second placement slot 11. A vortex centrifuge 12 is fixedly connected to the bottom of the inner wall of the testing box 1 on one side of the second placement slot 11. Centrifuge tubes 13 are installed inside the vortex centrifuge 12. A pretreatment device 14 is fixedly connected to the bottom of the inner wall of the first placement slot 10. The pretreatment device 14 includes a particle size observation box 141. A partition 142 is fixedly connected to the bottom of the inner wall of the particle size observation box 141. The bottom of the inner wall of the particle size observation box 141 has openings on both sides of the partition 142. A first sieve hole 143 and a second sieve hole 144 are used, with the diameter of the first sieve hole 143 being smaller than that of the second sieve hole 144. A blower mechanism 145 is connected through and fixedly to the inner wall of the particle size observation chamber 141 near the second sieve hole 144. A cleaning mechanism 146 is connected through and fixedly to the inner wall of the particle size observation chamber 141 near the first sieve hole 143. An industrial camera 147 is fixedly connected to one side of the inner wall of the particle size observation chamber 141. A grinding chamber 148 is fixedly connected to the bottom of the particle size observation chamber 141. Samplers 91 are installed inside the tool drawer 9. The rapid testing card box 92 and the dropper 93 are respectively set inside the rapid testing card box 92, which contains ochratoxin A test card, zearalenone test card and vomitoxin test card. The blower mechanism 145 includes a blower box 1451. A blower pipe 1452 is evenly connected to one side of the blower box 1451. Heating wires 1453 are evenly fixedly connected to the inner wall of the blower box 1451. The air outlet of the blower 1454 is connected to the side of the blower box 1451 away from the blower pipe 1452. The blower box 1451 penetrates one side of the inner wall of the particle size observation box 141 and is fixedly connected to the particle size observation box 141.

[0041] In use, sample 20g from each of the top, middle, and bottom layers of the grain pile using the sampler 91 in tool drawer 9, mix them, and then use the quartering method to reduce the sample to 8g as the test sample. This sample is then added to the particle size observation box 141 of the pretreatment device 14. Simultaneously, the blower 1454 of the blowing mechanism 145 is activated. The air generated by the blower 1454 enters the air box 1451 through the air outlet. If the grain temperature is high, the grain is cooled by blowing air to prevent excessive temperature from affecting subsequent test results. If the grain temperature is too low or it is damp, the heating wire 1453 inside the air box 1451 is activated. 3. The air in the bellows 1451 is heated and then blown evenly from the blower 1452 onto the grain falling into the particle size observation box 141. This dries and heats the grain, putting it in an optimal state for testing and improving the accuracy of subsequent grain testing results. Small-sized grain particles are blown towards the first screening hole 143 on one side of the partition 142, while large-sized grain particles fall into the second screening hole 144 below under the influence of gravity. The size of the falling grain particles is observed by the industrial camera 147, allowing operators to intuitively understand the grain particle size distribution.

[0042] For the second embodiment, please refer to... Figures 1-9 Based on the first embodiment, the present invention provides a technical solution: the impurity removal mechanism 146 includes an impurity removal box 1461, a collection nozzle 1462 connected to one side of the impurity removal box 1461, a first filter plate 1463 fixedly connected to the inner wall of the collection nozzle 1462, first filter holes 1464 evenly opened on the side of the first filter plate 1463, a movable groove 1465 evenly opened on one side of the inner wall of the impurity removal box 1461, a spring 1466 fixedly connected to one side of the inner wall of the movable groove 1465, baffles 1467 fixedly connected to both sides of the inner wall of the impurity removal box 1461, a second filter plate 1468 fixedly connected to the end of the spring 1466 away from the movable groove 1465, second filter holes 1469 evenly opened on the top of the second filter plate 1468, the bottom of the second filter plate 1468 slidably connected to the top of the baffle 1467, and the part of the side of the impurity removal box 1461 located below the second filter plate 1468 connected to the air inlet of a negative pressure fan 14610.

[0043] In use, when the blower mechanism 145 blows air onto the grain, it blows up dust and other fine impurities. Simultaneously, the negative pressure fan 14610 of the impurity removal mechanism 146 is activated, creating a negative pressure environment inside the impurity removal box 1461. Dust and other fine impurities enter the impurity removal box 1461 through the collection nozzle 1462 with the airflow. They first pass through the first filter plate 1463, where the first filter holes 1464 intercept the grain, preventing it from entering the impurity removal box 1461. The airflow continues, reaching the second filter plate 1468. The second filter pore 1469 further filters and traps fine dust and impurities, preventing them from entering the negative pressure fan 14610 and causing damage, thus ensuring smooth airflow. The filtered clean airflow is discharged from the outlet of the negative pressure fan 14610, while the impurities are trapped in the impurity removal box 1461. The impurity removal box 1461 can be cleaned regularly, thereby completing the removal of fine impurities such as dust from the grain, further improving the purity of the grain, and providing a guarantee for accurate subsequent testing.

[0044] Third embodiment, please refer to Figures 1-10 Based on the second embodiment, the present invention provides a technical solution: a sliding opening 14611 is provided on one side of the impurity removal box 1461. The inner wall of the sliding opening 14611 is slidably connected to the side of the second filter plate 1468. A limiting groove 14612 is provided on one side of the inner wall of the sliding opening 14611. A limiting stop rod 14613 is slidably connected through and on the side of the inner wall of the sliding opening 14611 away from the limiting groove 14612. A limiting rod 14614 is fixedly connected to one end of the limiting stop rod 14613 near the limiting groove 14612. A first mounting plate 14615 and a pull plate 14616 are fixedly connected to the other end of the limiting stop rod 14613 away from the limiting rod 14614. A second mounting plate 14617 is fixedly connected to one side of 1461. A threaded fixing rod 14618 is threaded through and threaded to the top of the second mounting plate 14617. A knob 14619 is fixedly connected to the top of the threaded fixing rod 14618. The bottom of the threaded fixing rod 14618 passes through the first mounting plate 14615 and is threaded to the first mounting plate 14615. The impurity removal box 1461 is fixedly connected to one side of the particle size observation box 141. The impurity collection nozzle 1462 passes through the particle size observation box 141 and is fixedly connected to the particle size observation box 141. The diameter of the first filter hole 1464 is larger than the diameter of the second filter hole 1469. The diameter of the first filter hole 1464 is smaller than the diameter of the first screening hole 143.

[0045] When replacing the second filter plate 1468, first rotate the knob 14619. The knob 14619 drives the threaded fixing rod 14618 to rotate. Under the action of the threads in the second mounting plate 14617 and the first mounting plate 14615, the threaded fixing rod 14618 moves upward until it disengages from the first mounting plate 14615. At this time, the limit stop 14613 loses the fixing effect of the threaded fixing rod 14618. Then pull the pull plate 14616. The pull plate 14616 drives the limit stop 14613 and the limit rod 14614 to move, causing the limit rod 14614 to disengage from the limit groove 14612. Then, the second filter plate 1468 pops out under the action of the spring 1466. Finally, the second filter plate 1468 is pulled out from the sliding port 14611, thus completing the replacement. The second filter plate 1468 is disassembled, and then a new second filter plate 1468 is installed. The new second filter plate 1468 is inserted into the impurity removal box 1461 along the sliding port 14611, so that the bottom of the second filter plate 1468 is slidably connected to the top of the baffle 1467. At the same time, the pull plate 14616 is pushed so that the limiting rod 14614 enters the limiting groove 14612 to initially limit the second filter plate 1468. Then, the knob 14619 is rotated in the opposite direction so that the threaded fixing rod 14618 moves downward and is threadedly connected to the first mounting plate 14615, thereby fixing the limiting stop rod 14613. This fixes the second filter plate 1468 in the impurity removal box 1461, completing the replacement of the second filter plate 1468. This ensures that the impurity removal mechanism 146 can continuously and effectively filter impurities in the grain, ensuring the accuracy of subsequent testing results.

[0046] For the fourth embodiment, please refer to [link / reference]. Figures 1-13Based on the third embodiment, the present invention provides a technical solution: Grinding rollers 1481 are rotatably connected to both sides of the inner wall of the grinding box 148; a conveying channel 1482 is fixedly connected to the bottom side of the grinding box 148; a conveying nozzle 1483 is connected to the bottom of the conveying channel 1482; a conveying plate 1484 is slidably connected through and to both sides of the bottom of the grinding box 148; a receiving port 1485 is opened at the top of the conveying plate 1484; the conveying plate 1484 extends into the interior of the conveying channel 1482 and is slidably connected to the inner wall of the conveying channel 1482; the movable end of an electric telescopic rod 1486 is fixedly connected to the side of the conveying plate 1484 away from the conveying channel 1482; the electric telescopic rod 1486... Two sets of telescopic rods 1486 are symmetrically distributed on one side of the conveying plate 1484. The fixed end of the electric telescopic rod 1486 is fixedly connected to the bottom of the inner wall of the second placement trough 11. The bottom of the inner wall of the second placement trough 11 is rotatably connected to a multi-station turntable 111. Weighing devices 112 are evenly fixedly connected to the top of the multi-station turntable 111. Sampling bottles 113 are fixedly connected to the top of the weighing devices 112. A third placement trough 114 is opened on both sides of the inner wall of the second placement trough 11. An extraction liquid tank 115 is fixedly connected to the bottom of the inner wall of the third placement trough 114. The inlet of the metering pump 116 is connected to one side of the extraction liquid tank 115. The outlet of the metering pump 116 is connected to a dripping pipe 117.

[0047] In use, the sieved grains fall into the grinding chamber 148 through the sieve holes. Then, the grinding rollers 1481 inside the grinding chamber 148 are activated to grind the grains into fine powder, which finally falls into the receiving port 1485 on the conveying plate 1484. When adding a sample, the electric telescopic rod 1486 is activated. The movable end of the electric telescopic rod 1486 pushes the conveying plate 1484 into the conveying channel 1482 until the conveying plate 1484 moves above the conveying nozzle 1483. The ground powder passes through the conveying nozzle 1483. The sampling bottle 113 falls onto the multi-station turntable 111 in the second placement tank 11 for weighing. After the weighing is completed, the multi-station turntable 111 is started to rotate the sampling bottle 113 to the bottom of the extraction liquid tank 115 corresponding to the testing requirements. Then the metering pump 116 is started. The metering pump 116 drips the extraction liquid in the extraction liquid tank 115 into the sampling bottle 113 quantitatively through the drip tube 117. This avoids the impact of traditional manual addition of extraction liquid on the test results and the waste caused by liquid dripping during the addition of extraction liquid, thus improving the accuracy of subsequent test results.

[0048] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A device for rapid detection of grain commodity safety, characterized in that: Including the detection box (1), one side of the detection box (1) is connected with the sealing cover (2) through and rotates, the sealing cover (2) bottom is fixedly connected with the sealing ring (3), the sealing groove (4) is set up in the detection box (1) inner wall bottom, the dust cover (5) is fixedly connected on one side of the sealing cover (2), the detection box (1) one side is fixedly connected with annular dust plate (6), the detection box (1) one side is located in the part of annular dust plate (6) inside and is connected with detection instrument (7) through and fixedly, the detection box (1) one side is connected with display screen (8) through and fixedly, the detection box (1) one side is connected with tool drawer (9) through and slidingly, the first placing groove (10) and the second placing groove (11) are set up in the detection box (1) inner wall bottom respectively, the vortex centrifuge (12) is connected with the detection box (1) inner wall bottom through and fixedly and is located at the second placing groove (11) one side, the vortex centrifuge (12) is provided with centrifugal tube (13) inside, the first placing groove (10) inner wall bottom is fixedly connected with pretreatment device (14); The pretreatment device (14) includes a particle size observation box (141), the particle size observation box (141) is fixedly connected with a partition (142) on the inner wall bottom, first and second screening holes (143) and (144) are respectively formed on both sides of the partition (142) on the inner wall bottom of the particle size observation box (141), the first screening hole (143) has a smaller diameter than the second screening hole (144), a blowing mechanism (145) is fixedly connected through the inner wall of the particle size observation box (141) on the side close to the second screening hole (144), a impurity removal mechanism (146) is fixedly connected through the inner wall of the particle size observation box (141) on the side close to the first screening hole (143), an industrial camera (147) is fixedly connected on the inner wall of the particle size observation box (141), and a grinding box (148) is fixedly connected on the bottom of the particle size observation box (141).

2. The device for rapid detection of grain safety according to claim 1, characterized in that: The tool drawer (9) is provided with a sampler (91), a rapid detection card box (92), and a dropper (93) inside, respectively, the rapid detection card box (92) is provided with an aflatoxin B1 detection card, a zearalenone detection card, and a vomit toxin detection card inside.

3. The device for rapid detection of grain safety according to claim 1, characterized in that: The blowing mechanism (145) includes a bellows (1451), the bellows (1451) is uniformly connected with a blowing pipe (1452) on one side, the bellows (1451) is fixedly connected with an electric heating wire (1453) on the inner wall, the bellows (1451) is connected with the air outlet of an air blower (1454) on the side away from the blowing pipe (1452), and the bellows (1451) is connected with the inner wall of the particle size observation box (141) through and fixedly connected with the particle size observation box (141).

4. The device for rapid detection of grain safety according to claim 1, characterized in that: The impurity removing mechanism (146) comprises an impurity removing box (1461), one side of the impurity removing box (1461) is communicated with a collecting nozzle (1462), the inner wall of the collecting nozzle (1462) is fixedly connected with a first filter plate (1463), the side of the first filter plate (1463) is uniformly provided with a first filter hole (1464), the inner wall of one side of the impurity removing box (1461) is uniformly provided with a movable groove (1465), the inner wall of one side of the movable groove (1465) is fixedly connected with a spring (1466), the inner wall of both sides of the impurity removing box (1461) is fixedly connected with a baffle (1467), one end of the spring (1466) away from the movable groove (1465) is fixedly connected with a second filter plate (1468), the top of the second filter plate (1468) is uniformly provided with a second filter hole (1469), the bottom of the second filter plate (1468) is slidably connected with the top of the baffle (1467), and the side of the impurity removing box (1461) below the second filter plate (1468) is communicated with an air inlet of a negative pressure fan (14610).

5. The device for rapid detection of grain commodity safety according to claim 4, characterized in that: The side of the impurity removing box (1461) is provided with a sliding hole (14611), the inner wall of the sliding hole (14611) is slidably connected with the side of the second filter plate (1468), the inner wall of the sliding hole (14611) is provided with a limiting groove (14612) on one side, the inner wall of the sliding hole (14611) is penetrated and slidably connected with a limiting stop rod (14613) on the side away from the limiting groove (14612), one end of the limiting stop rod (14613) close to the limiting groove (14612) is fixedly connected with a limiting rod (14614), and the end of the limiting stop rod (14613) away from the limiting rod (14614) is fixedly connected with a first mounting plate (14615) and a pull plate (14616) respectively.

6. The device for rapid detection of grain safety according to claim 5, characterized in that: The impurity removing box (1461) is fixedly connected to one side of the particle size observation box (141), the collecting nozzle (1462) penetrates the particle size observation box (141) and is fixedly connected with the particle size observation box (141), the pore diameter of the first filter hole (1464) is larger than that of the second filter hole (1469), and the pore diameter of the first filter hole (1464) is smaller than that of the first screening hole (143). 7.The device for rapid detection of grain safety according to claim 1, characterized in that: The both sides of the inner wall of the grinding box (148) are rotationally connected with grinding rollers (1481), the bottom of the side of the grinding box (148) is fixedly connected with a material conveying channel (1482), the bottom of the material conveying channel (1482) is communicated with a material conveying nozzle (1483), the bottom of the both sides of the grinding box (148) penetrates and is slidingly connected with a material conveying plate (1484), the top of the material conveying plate (1484) is provided with a material receiving opening (1485), the material conveying plate (1484) extends into the material conveying channel (1482) and is slidingly connected with the inner wall of the material conveying channel (1482), the side, away from the material conveying channel (1482), of the material conveying plate (1484) is fixedly connected with the movable end of an electric telescopic rod (1486), the electric telescopic rod (1486) is provided with two groups and is symmetrically distributed on one side of the material conveying plate (1484), and the fixed end of the electric telescopic rod (1486) is fixedly connected with the bottom of the inner wall of the first placing groove (10). 8.The device for rapid detection of grain safety according to claim 1, characterized in that: The bottom of the inner wall of the second placing groove (11) is rotationally connected with a multi-station turntable (111), the top of the multi-station turntable (111) is uniformly fixedly connected with a weighter (112), the top of the weighter (112) is fixedly connected with a sampling bottle (113), the both sides of the inner wall of the second placing groove (11) are provided with third placing grooves (114), the bottom of the inner wall of the third placing groove (114) is fixedly connected with an extracting liquid tank (115), one side of the extracting liquid tank (115) is communicated with the water inlet of a metering pump (116), and the water outlet of the metering pump (116) is communicated with a dropping tube (117).

9. A detection method of a device for rapid detection of grain commodity safety, characterized in that, The method comprises the following steps: S1: Before detection, first read the instruction manual, then open the tool drawer (9), take out the sampler (91), and use the sampler (91) to take 20g of the upper, middle and lower of the grain pile respectively, mix them, and then take 8g as the detection sample by the quartering method. S2: After the sample is taken, the sample is placed in the pretreatment device (14) for pretreatment operation such as impurity removal, and the sample is subjected to crushing treatment. S3: The crushed sample is conveyed to the sampling bottle (113) through the material conveying nozzle (1483) of the material conveying channel (1482), 5g of the crushed sample is weighed by the weighter (112), and the multi-station turntable (111) can meet various detection requirements. S4: After 5g of the crushed sample is weighed, the multi-station turntable (111) is rotated to the lower side of the corresponding extracting liquid tank (115) according to the detection requirement, and then 15ml of the extracting liquid is quantitatively added by the metering pump (116). S5: After 15ml of the extracting liquid is added, the sampling bottle (113) is taken out, the sampling bottle (113) is placed on the vortex centrifuge (12) for centrifugal oscillation, after centrifugation, according to the detection requirement, the corresponding detection card in the rapid detection card tank (92) is taken out and the outer packaging is torn, then the dropping tube (93) is taken out, 100 microliters of supernatant is taken from the centrifuged sample liquid, 1ml of diluent is taken, and then 75 microliters of the sample is dropped into the detection card sample adding hole. S6: Put the detection card into the detector (7), then cover the sealing cover (2), make the sealing ring (3) coincide with the sealing groove (4), and cover the dust cover (5) on the annular dustproof plate (6), so as to form a sealed dustproof environment during detection, and observe the result through the display screen (8).

10. The detection method of the device for rapidly detecting the safety of grain crops according to claim 9, characterized in that: When pretreatment is performed, the particle size can be observed through the industrial camera (147), the sample can be dried through the air blowing mechanism (145), and the dust and other impurities in the sample can be removed through the impurity removal mechanism (146).

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