Agricultural product heavy metal detector

Abstract

The application discloses a kind of agricultural product heavy metal detectors, it is related to agricultural product heavy metal detection technical field, including box and switching component, the top central of the box is provided with stage, the switching component is set to one side of stage, and switching component includes motor, the output shaft of the motor is connected with driving gear, and the bottom of driving gear is engaged with double gear shaft, one end of the double gear shaft is engaged with single gear shaft, and the upper and lower ends of single gear shaft are placed with cutter outside.The application can control the work and transposition state of sample preparation cylinder respectively by different steering of single motor, one-way bearing idling maintains the position stability of sample preparation cylinder when sampling, and driving sleeve linkage one-way bearing realizes double sample preparation cylinder automatic transposition when reversing, the design integrates crushing, mixing and cleaning function in single equipment, can backflush internal screen plate after adjustment, optimize cleaning effect, significantly improve the efficiency of multiple sample continuous processing, suitable for a variety of agricultural product continuous detection.

Description

Technical Field

[0001] This invention relates to the field of heavy metal detection technology in agricultural products, specifically to a heavy metal detector for agricultural products. Background Technology

[0002] Heavy metal testing of agricultural products refers to the technical process of quantitatively analyzing the content of toxic and harmful metal elements such as lead, cadmium, mercury, arsenic, and chromium in agricultural products. Its core purpose is to assess the degree of heavy metal pollution in agricultural products through scientific means, ensure food quality and safety, and prevent harmful substances from harming human health through the food chain. Heavy metal detectors are required in the process of heavy metal testing of agricultural products.

[0003] For example, the invention disclosed in publication number CN111208124B is a portable intelligent food heavy metal detector. This invention, by setting up a first motor, a grinding head, and a grinding frame, can grind food. Food pieces of the appropriate size fall between the grinding head and the grinding frame, and the ground food pieces are stirred by a second motor, a stirring shaft, and a stirring rod to ensure uniform mixing. A threaded rod, a connecting plate, an L-shaped plate, and a fixing plate are used to fix heavy metal test strips. The mixed food solution is then dripped onto the heavy metal test strips through a dropper and a valve, enabling rapid food detection. This solves the problem that most existing food heavy metal detectors require a series of steps before detection, such as sampling, crushing, stirring, and mixing, which is cumbersome and time-consuming. Furthermore, when testing multiple samples, such devices require frequent cleaning of the grinding head, grinding frame, and dropper inside the casing to avoid cross-interference, resulting in time-consuming and labor-intensive maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a heavy metal detector for agricultural products to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an agricultural product heavy metal detector, comprising a housing and a switching assembly. A platform is provided at the top center of the housing, and the switching assembly is located on one side of the platform. The switching assembly includes a motor, the output shaft of which is connected to a drive gear. A double gear shaft meshes with the bottom of the drive gear. A single gear shaft meshes with one end of the double gear shaft. A cutter is disposed on the outer sides of the upper and lower ends of the single gear shaft. A stirring blade is fixed to the outer sides of the upper and lower ends of the single gear shaft. A sieve plate is rotatably connected to the middle of the upper and lower ends of the cutter. A sample preparation cylinder is fixed to the outer side of the sieve plate. A T-shaped tube is disposed between the sample preparation cylinders. A one-way bearing is disposed on the outer side of one end of the T-shaped tube. A drive sleeve is fixed to the outer ring of the one-way bearing. A gear ring is disposed on the inner side of the drive sleeve, and the gear ring meshes with the drive gear.

[0006] Furthermore, the housing is fixedly connected to the motor, and the housing is rotatably connected to the drive sleeve, the T-tube, and the double gear shaft, with the T-tube rotatably connected to the double gear shaft.

[0007] Furthermore, a first spring seat is disposed at the middle of one end of the box body, and a clamping plate is connected to one end of the first spring seat, and one side of the clamping plate is arc-shaped.

[0008] Furthermore, a sealing assembly is provided at one end of the sample preparation tube, and the sealing assembly includes a second spring seat. The second spring seat is fixed to the outer side of one end of the sample preparation tube, and a drive plate is installed at the end of the second spring seat. A sliding sleeve is fixed inside the lower end of the drive plate, and a sealing sleeve is slidably connected to the outer side of one end of the sliding sleeve, and the sealing sleeve is fixedly connected to the sample preparation tube.

[0009] Furthermore, a sealing plug is slidably connected inside one end of the sliding sleeve, and a fixing plate is fixed on one side of the sealing plug, and the fixing plate is fixedly connected to the sample preparation cylinder. A sealing block is slidably connected inside the sealing plug, and the sealing block is fixedly connected to the sliding sleeve.

[0010] Furthermore, a pressing assembly is installed at the top center of the box, and the pressing assembly includes a knob. The knob is rotatably connected to the top of the box, and a screw is fixed to the bottom of the knob. A lifting plate is threaded to the lower outer side of the screw, and T-shaped clamps are fixed to the top of both ends of the lifting plate. The T-shaped clamps are slidably connected to the box. Guide plates are installed at both ends of the bottom of the lifting plate, and sliding columns are slidably connected inside the guide plates. A connecting sleeve is installed at one end of the sliding column.

[0011] Furthermore, the connecting sleeve is T-shaped, and the upper and lower ends of the connecting sleeve are slidably connected to support rods, and the support rods are fixedly connected to the housing. A telescopic hose is connected to one side of the connecting sleeve, and a pump body is installed at the end of the telescopic hose.

[0012] Furthermore, the lower part of the drive sleeve is provided with an adjustment component, which includes a gear ring. The gear ring is disposed on the outer circumferential surface of the drive sleeve, and a synchronous gear meshes with the bottom of the gear ring. The synchronous gear is rotatably connected to the housing via a rotating shaft. A cam is fixed on one side of the synchronous gear, and a ball rod is slidably connected to the bottom of the cam. A retaining ring is fixed to the outside of the ball rod, and a return spring abuts against the bottom of the retaining ring. A support block abuts against the bottom of the return spring, and the support block is fixedly connected to the housing.

[0013] Furthermore, a strong magnetic column is installed at the lower end of the reset spring, and a strong magnetic block is slidably connected to the bottom of the strong magnetic column. A cover plate is fixed to the outside of the strong magnetic block, and a connecting shaft is provided inside one end of the cover plate. The connecting shaft is rotatably connected to the sample preparation cylinder, and a torsion spring is sleeved on the outside of one end of the connecting shaft. The torsion spring is rotatably connected to the sample preparation cylinder and the cover plate respectively.

[0014] Furthermore, a filter frame is slidably connected inside the housing, and a drain valve is provided on one side of the lower part of the housing.

[0015] This invention provides a heavy metal detector for agricultural products, which has the following beneficial effects:

[0016] 1. This invention allows for separate control of the working and repositioning states of the sample preparation cylinder by using a single motor with different directions. During sample preparation, the one-way bearing rotates freely to maintain the stability of the sample preparation cylinder position. During reverse rotation, the drive sleeve links with the one-way bearing to achieve automatic repositioning of the two sample preparation cylinders. This design integrates crushing, mixing, and cleaning functions into a single device. After repositioning, the internal sieve plate can be backwashed to optimize the cleaning effect and significantly improve the efficiency of continuous processing of multiple samples. It is suitable for continuous testing of various agricultural products.

[0017] 2. The knob of this invention can simultaneously control the clamping of the test strip and the sealing and liquid injection of the sample preparation tube. When the screw rotates, it synchronously drives the test strip clamping and guide plate to press down. The inclined groove controls the sealing and docking of the connecting sleeve with the sliding sleeve to realize subsequent liquid injection and cleaning. Pushing the upper drive plate will trigger the dripping mode, which makes it convenient to drip onto the test strip for detection. This structure seamlessly connects the operation of test strip positioning and sample preparation tube liquid injection and cleaning pretreatment, eliminating extra operation steps and ensuring convenient operation.

[0018] 3. In this invention, when the sample preparation cylinder is adjusted, the torsion spring closes the cover to prevent the internal solution from spilling out, while the rotation of the cam triggers the magnetic attraction of the ball rod to open the cover. The reset spring maintains the ball rod in contact with the cam trajectory. This design realizes automatic opening and closing of the cover during the cleaning process, ensuring that the sample preparation cylinder is fully soaked and cleaned, and also agitated and efficiently drained. The multiple cyclic rinsing mechanism improves the cleanliness of the cylinder, ensuring cross-contamination prevention and control from the hardware level and improving the detection accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a heavy metal detector for agricultural products according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the housing of a heavy metal detector for agricultural products according to the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the switching component of a heavy metal detector for agricultural products according to the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of a dual-gear shaft for a heavy metal detector for agricultural products according to the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the adjustment component of a heavy metal detector for agricultural products according to the present invention;

[0024] Figure 6This is a three-dimensional structural diagram of the sealing component of a heavy metal detector for agricultural products according to the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the crimping component of a heavy metal detector for agricultural products according to the present invention.

[0026] In the diagram: 1. Box body; 2. Stage; 3. Switching assembly; 301. Motor; 302. Drive gear; 303. Double gear shaft; 304. Single gear shaft; 305. Cutter; 306. Stirring blade; 307. Sieve plate; 308. Sample preparation cylinder; 309. T-tube; 310. One-way bearing; 311. Drive sleeve; 312. Gear ring; 4. First spring seat; 5. Clamping plate; 6. Sealing assembly; 601. Second spring seat; 602. Drive plate; 603. Sliding sleeve; 604. Sealing sleeve; 605. Sealing plug; 606. Fixing plate; 607. Sealing block; 7. 701. Pressing assembly; 702. Knob; 703. Screw; 704. Lifting plate; 705. T-shaped clamp; 706. Guide plate; 707. Sliding column; 708. Connecting sleeve; 709. Support rod; 7000. Telescopic hose; 710. Pump body; 801. Adjusting assembly; 802. Gear ring; 803. Synchronous gear; 804. Cam; 805. Ball rod; 806. Retaining ring; 807. Return spring; 808. Support block; 809. Strong magnetic column; 810. Strong magnetic block; 811. Cover plate; 812. Connecting shaft; 813. Torsion spring; 9. Filter frame; 10. Drain valve. Detailed Implementation

[0027] Please see Figures 1 to 5This invention provides a technical solution: a heavy metal detector for agricultural products, comprising a housing 1 and a switching assembly 3. A platform 2 is positioned at the center of the top of the housing 1. The switching assembly 3 is located on one side of the platform 2 and includes a motor 301. The output shaft of the motor 301 is connected to a drive gear 302. A double gear shaft 303 meshes with the bottom of the drive gear 302. A single gear shaft 304 meshes with one end of the double gear shaft 303. Cutters 305 are mounted on the outer sides of the upper and lower ends of the single gear shaft 304. Stirring blades 306 are fixed to the outer sides of the upper and lower ends of the single gear shaft 304. A sieve plate 307 is rotatably connected to the middle of the upper and lower ends of the cutter 305. A sample preparation cylinder 308 is fixed on the outside, and a T-shaped tube 309 is arranged between the sample preparation cylinders 308. A one-way bearing 310 is provided on the outer side of one end of the T-shaped tube 309. A drive sleeve 311 is fixed on the outer ring of the one-way bearing 310, and a gear ring 312 is arranged on the inner side of the drive sleeve 311. The gear ring 312 meshes with the drive gear 302. The housing 1 is fixedly connected to the motor 301, and the housing 1 is rotatably connected to the drive sleeve 311, the T-shaped tube 309, and the double gear shaft 303. The T-shaped tube 309 is rotatably connected to the double gear shaft 303. A first spring seat 4 is arranged in the middle of one end of the housing 1, and a clamping plate 5 is connected to one end of the first spring seat 4. One side of the clamping plate 5 is arc-shaped.

[0028] The specific operation is as follows: When the agricultural product sample is placed in the upper sample preparation cylinder 308, the motor 301 can be started by the controller, which drives the cutter 305 and the stirring blade 306 to rotate through the drive gear 302, double gear shaft 303 and single gear shaft 304. This crushes the sample inside the sample preparation cylinder 308. After being sieved by the sieve plate 307, the sample falls into the lower part of the sample preparation cylinder 308. The stirring blade 306 mixes the sample solution. During this process, the one-way bearing 310 is in an idle state and does not perform transmission. At the same time, the first spring seat 4 pushes the clamping plate 5, so that its concave part fits against the upper outer side of the T-shaped tube 309, limiting its position and keeping the sample preparation cylinder 308 stable. After sample preparation, the motor 301 can be reversed by the controller. At this time, the drive gear 302, double gear shaft 303 and single gear shaft 304 will rotate. 02 will drive the T-tube 309 to rotate through the gear ring 312, drive sleeve 311 and one-way bearing 310. At the same time, the T-tube 309 will squeeze the clamping plate 5, causing the first spring seat 4 to retract and automatically avoid, thereby quickly switching the positions of the upper and lower sample preparation cylinders 308. This allows the used sample preparation cylinder 308 to be moved to the lower position, making it easier to pour out the waste material inside and rinse it. At the same time, the sample preparation cylinder 308 can be used for sample preparation, thereby improving the efficiency of processing various samples. During the sample preparation process, the cutter 305 and stirring blade 306 inside the lower sample preparation cylinder 308 can also rotate to stir the cleaning solution, thereby improving the cleaning effect. At the same time, the cleaning solution will also backwash the sieve plate 307 to prevent it from clogging.

[0029] Please see Figure 2 , Figures 5 to 7 A sealing assembly 6 is provided at one end of the sample preparation cylinder 308, and the sealing assembly 6 includes a second spring seat 601. The second spring seat 601 is fixed to the outer side of one end of the sample preparation cylinder 308, and a drive plate 602 is arranged at the end of the second spring seat 601. A sliding sleeve 603 is fixed inside the lower end of the drive plate 602, and a sealing sleeve 604 is slidably connected to the outer side of one end of the sliding sleeve 603. The sealing sleeve 604 is fixedly connected to the sample preparation cylinder 308. A sealing plug 605 is slidably connected to the inner side of one end of the sliding sleeve 603, and a fixing plate 606 is fixed to one side of the sealing plug 605. The fixing plate 606 is fixedly connected to the sample preparation cylinder 308. A sealing block 607 is slidably connected inside the sealing plug 605, and the sealing block 607 is fixedly connected to the sliding sleeve 603. A pressing assembly 7 is arranged at the center of the top of the box body 1. The crimping assembly 7 includes a knob 701, which is rotatably connected to the top of the housing 1. A screw 702 is fixed to the bottom of the knob 701. A lifting plate 703 is threaded to the lower outer side of the screw 702. T-shaped clamps 704 are fixed to the top of both ends of the lifting plate 703. The T-shaped clamps 704 are slidably connected to the housing 1. Guide plates 705 are installed at both ends of the bottom of the lifting plate 703. A sliding column 706 is slidably connected inside the guide plate 705. A connecting sleeve 707 is installed at one end of the sliding column 706. The connecting sleeve 707 is T-shaped. Support rods 708 are slidably connected inside the upper and lower ends of the connecting sleeve 707. Support rods 708 are fixedly connected to the housing 1. A telescopic hose 709 is connected to one side of the connecting sleeve 707. A pump body 710 is installed at the end of the telescopic hose 709.

[0030] The specific operation is as follows: After placing the test strip on the stage 2, simply rotate the screw 702 by turning the knob 701 to move the lifting plate 703 and the T-shaped clamp 704 downwards, pressing and positioning the test strip. At the same time, the lifting plate 703 will also move the guide plate 705 downwards, causing the sliding column 706 to slide in its internal inclined groove. This allows the connecting sleeve 707 to press the drive plate 602 under the guidance of the support rod 708, simultaneously covering the end of the sliding sleeve 603. The end of the connecting sleeve 707 is made of rubber, improving the sealing performance between the connecting sleeve 707 and the drive plate 602. When the drive plate 602 is pressed, the sliding sleeve 603 will separate from the sealing plug 605, allowing the pump body 710 to pump the external cleaning fluid through the telescopic hose 709, the connecting sleeve 707, and the sliding sleeve 603. The solution is conveyed to the lower sample preparation cylinder 308 for easy rinsing. When the solution inside the upper sample preparation cylinder 308 is dripped onto the test paper, a quick and gentle push of the drive plate 602 creates a small opening between the sealing plug 605 and the sliding sleeve 603 to allow the sample solution to drip. After releasing the pressure, the second spring seat 601 pushes the drive plate 602, causing the sealing plug 605 to adhere tightly to the sealing block 607, automatically sealing the sample. Similarly, when the reverse knob 701 is used to remove the test paper to observe the color, the connecting sleeve 707 automatically separates from the sliding sleeve 603, allowing for subsequent replacement of the positions of the upper and lower sample preparation cylinders 308. This allows for docking without additional steps, making the process very convenient.

[0031] Please see Figure 3 and Figure 5 The lower part of the drive sleeve 311 is provided with an adjustment component 8, which includes a gear ring 801. The gear ring 801 is mounted on the outer circumferential surface of the drive sleeve 311, and a synchronous gear 802 is meshed at the bottom of the gear ring 801. The synchronous gear 802 is rotatably connected to the housing 1 via a rotating shaft. A cam 803 is fixed on one side of the synchronous gear 802, and a ball rod 804 is slidably connected to the bottom of the cam 803. A retaining ring 805 is fixed to the outside of the ball rod 804, and a return spring 806 abuts against the bottom of the retaining ring 805. A support block 807 abuts against the bottom of the return spring 806. 807 is fixedly connected to the housing 1. A strong magnetic column 808 is installed at the lower end of the return spring 806, and a strong magnetic block 809 is slidably connected to the bottom of the strong magnetic column 808. A cover plate 810 is fixed to the outside of the strong magnetic block 809, and a connecting shaft 811 is provided inside one end of the cover plate 810. The connecting shaft 811 is rotatably connected to the sample preparation cylinder 308, and a torsion spring 812 is sleeved on the outside of one end of the connecting shaft 811. The torsion spring 812 is rotatably connected to the sample preparation cylinder 308 and the cover plate 810 respectively. A filter frame 9 is slidably connected inside the housing 1, and a drain valve 10 is provided on one side of the lower part of the housing 1.

[0032] The specific operation is as follows: During the repositioning of the sample preparation cylinder 308, the torsion spring 812 will drive the cover plate 810 to cover the upper end of the sample preparation cylinder 308. When the sample preparation cylinder 308 moves to the lower position, the strong magnetic block 809 will limit the cover plate 810, thereby preventing the cleaning fluid inside the sample preparation cylinder 308 from being squeezed out of the cover plate 810 under the action of gravity. Therefore, the cleaning fluid can fill the interior of the sample preparation cylinder 308 to agitate and clean its interior. At the same time, during the rotation of the drive sleeve 311, the cam 803 will also be driven to rotate through the gear ring 801 and the synchronous gear 802, and the return spring 806 will be in place on the support block 80. The limiting force of 7 pushes the retaining ring 805, causing the upper end of the ball rod 804 to be in close contact with the cam 803. Therefore, when the ball rod 804 moves to the recess of the cam 803, the ball rod 804 moves upward and pulls one end of the cover plate 810 through the strong magnetic column 808 and the strong magnetic block 809, causing it to rotate around the connecting shaft 811 to open and discharge the internal cleaning liquid. Subsequently, as the cam 803 continues to rotate, the cover plate 810 can be closed again for multiple rinsing, thereby improving the cleaning effect inside the sample preparation cylinder 308. Subsequently, the filter frame 9 will filter and block the residual solid waste, and the filtered waste liquid can be discharged through the drain valve 10.

[0033] In summary, when using this heavy metal detector for agricultural products, first open the cover plate 810, place the agricultural product sample in the upper sample preparation cylinder 308, then place the test strip on the stage 2. By rotating the screw 702 through the knob 701, the lifting plate 703 will move the T-shaped clamping plate 704 downward, pressing and positioning the test strip. At the same time, the lifting plate 703 will also move the guide plate 705 downward, causing the sliding column 706 to slide in its internal inclined groove. Under the guidance of the support rod 708, the connecting sleeve 707 will press against the drive plate 602, and simultaneously move the sliding sleeve 607... When the end of the 03 is covered, and when the drive plate 602 is squeezed, the sliding sleeve 603 will separate from the sealing plug 605. The pump body 710 can then transport the external cleaning fluid through the telescopic hose 709, connecting sleeve 707 and sliding sleeve 603 to the sample preparation cylinder 308 below, so as to facilitate the internal rinsing. At the same time, the strong magnetic block 809 will limit the lower cover plate 810, thereby preventing the cleaning fluid inside the sample preparation cylinder 308 from being squeezed out of the cover plate 810 directly under the action of gravity, so that the cleaning fluid fills the interior of the sample preparation cylinder 308.

[0034] Secondly, by starting the motor 301 through the controller, it drives the cutter 305 and the stirring blade 306 to rotate through the drive gear 302, the double gear shaft 303 and the single gear shaft 304, which can crush the sample inside the sample preparation cylinder 308. After being screened by the sieve plate 307, the sample falls into the lower part of the sample preparation cylinder 308. The stirring blade 306 mixes the sample solution to prepare the sample. At the same time, the cutter 305 and the stirring blade 306 inside the lower sample preparation cylinder 308 will also rotate to stir the cleaning solution, thereby improving the cleaning effect.

[0035] Next, the drive sleeve 311 drives the cam 803 to rotate via the gear ring 801 and the synchronous gear 802. At this time, the one-way bearing 310 is in an idle state and will not perform transmission. Simultaneously, the first spring seat 4 pushes the retaining plate 5, causing its concave part to fit against the upper outer side of the T-tube 309, limiting its position and keeping the sample tube 308 stable. Meanwhile, the return spring 806 pushes the retaining ring 805 under the limiting position of the support block 807, so that the upper end of the ball rod 804 is in close contact with the cam 803. Therefore, when the ball rod 804 moves... When the cam 803 reaches the recess, the ball rod 804 moves upward and pulls one end of the cover plate 810 through the strong magnetic column 808 and the strong magnetic block 809, causing it to rotate around the connecting shaft 811 to open and discharge the internal cleaning liquid. As the cam 803 continues to rotate, the cover plate 810 can be closed again for multiple rinsing, thereby improving the cleaning effect inside the sample preparation cylinder 308. Subsequently, the filter frame 9 will filter and block the residual solid waste, and the filtered waste liquid can be discharged through the drain valve 10.

[0036] Then, after sample preparation, simply push the drive plate 602 quickly and gently to create a small opening between the sealing plug 605 and the sliding sleeve 603 so that the sample solution can drip down. After releasing the hand, the second spring seat 601 will push the drive plate 602 to make the sealing plug 605 and the sealing block 607 stick together and automatically perform the sealing operation. Afterwards, when you reverse the knob 701 to remove the test paper to observe the color, the connecting sleeve 707 and the sliding sleeve 603 can also be automatically separated.

[0037] Finally, the controller reverses the motor 301, at which point the drive gear 302 drives the T-tube 309 to rotate via the gear ring 312, drive sleeve 311, and one-way bearing 310. At the same time, the T-tube 309 presses against the clamping plate 5, causing the first spring seat 4 to retract and automatically avoid, thereby quickly switching the positions of the upper and lower sample preparation cylinders 308. This allows the used sample preparation cylinder 308 to be moved to the lower position for easy rinsing, while also enabling the sample preparation cylinder 308 to be used for sample preparation, thus improving the efficiency of processing various samples.

[0038] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A heavy metal detector for agricultural products, characterized in that, The assembly includes a housing (1) and a switching component (3). A platform (2) is provided at the top center of the housing (1). The switching component (3) is located on one side of the platform (2). The switching component (3) includes a motor (301). The output shaft of the motor (301) is connected to a drive gear (302). A double gear shaft (303) meshes with the bottom of the drive gear (302). A single gear shaft (304) meshes with one end of the double gear shaft (303). A cutter (305) is placed on the outer side of the upper and lower ends of the single gear shaft (304). A stirring blade (306) is fixed on the outer side of the upper and lower ends of the single gear shaft (304). A sieve plate (307) is rotatably connected to the middle of the upper and lower ends of the cutter (305). 7) A sample preparation cylinder (308) is fixed on the outside of the sample preparation cylinder (308). A T-shaped tube (309) is arranged between the sample preparation cylinders (308). A one-way bearing (310) is provided on the outer side of one end of the T-shaped tube (309). A drive sleeve (311) is fixed on the outer ring of the one-way bearing (310). A gear ring (312) is arranged on the inner side of the drive sleeve (311). The gear ring (312) meshes with the drive gear (302). A pressing assembly (7) is arranged at the center of the top of the box (1). The pressing assembly (7) includes a knob (701). The knob (701) is rotatably connected to the top of the box (1). A screw (702) is fixed at the bottom of the knob (701). A lifting plate (702) is threadedly connected to the lower outer side of the screw (702). 03), and T-shaped clamps (704) are fixed at the top of both ends of the lifting plate (703), and the T-shaped clamps (704) are slidably connected to the box (1). Guide plates (705) are installed at both ends of the bottom of the lifting plate (703), and a sliding column (706) is slidably connected inside the guide plate (705). A connecting sleeve (707) is installed at one end of the sliding column (706). The connecting sleeve (707) is T-shaped, and a support rod (708) is slidably connected inside the upper and lower ends of the connecting sleeve (707). The support rod (708) is fixedly connected to the box (1). A telescopic hose (709) is connected to one side of the connecting sleeve (707), and a pump body (710) is installed at the end of the telescopic hose (709). The drive sleeve (31) 1) The lower part is provided with an adjustment component (8), and the adjustment component (8) includes a gear ring (801). The gear ring (801) is placed on the outer peripheral surface of the drive sleeve (311), and the bottom of the gear ring (801) is meshed with a synchronous gear (802). The synchronous gear (802) is rotatably connected to the housing (1) through a rotating shaft. A cam (803) is fixed on one side of the synchronous gear (802), and a ball rod (804) is slidably connected to the bottom of the cam (803). A retaining ring (805) is fixed to the outside of the ball rod (804), and a return spring (806) abuts against the bottom of the retaining ring (805). A support block (807) abuts against the bottom of the return spring (806), and the support block (807) is fixedly connected to the housing (1).A strong magnetic column (808) is mounted on the lower end of the return spring (806), and a strong magnetic block (809) is slidably connected to the bottom of the strong magnetic column (808). A cover plate (810) is fixed to the outside of the strong magnetic block (809), and a connecting shaft (811) is provided inside one end of the cover plate (810). The connecting shaft (811) is rotatably connected to the sample preparation cylinder (308), and a torsion spring (812) is sleeved on the outside of one end of the connecting shaft (811). The torsion spring (812) is rotatably connected to both the sample preparation cylinder (308) and the cover plate (810).

2. The heavy metal detector for agricultural products according to claim 1, characterized in that, The housing (1) is fixedly connected to the motor (301), and the housing (1) is rotatably connected to the drive sleeve (311), the T-tube (309), and the double gear shaft (303), and the T-tube (309) is rotatably connected to the double gear shaft (303).

3. The heavy metal detector for agricultural products according to claim 2, characterized in that, A first spring seat (4) is placed in the middle of one end of the box (1), and a card plate (5) is connected to one end of the first spring seat (4), and one side of the card plate (5) is arc-shaped.

4. The heavy metal detector for agricultural products according to claim 1, characterized in that, One end of the sample preparation cylinder (308) is provided with a sealing component (6), and the sealing component (6) includes a second spring seat (601). The second spring seat (601) is fixed on the outer side of one end of the sample preparation cylinder (308), and a drive plate (602) is arranged at the end of the second spring seat (601). A sliding sleeve (603) is fixed inside the lower end of the drive plate (602), and a sealing sleeve (604) is slidably connected to the outer side of one end of the sliding sleeve (603), and the sealing sleeve (604) is fixedly connected to the sample preparation cylinder (308).

5. The heavy metal detector for agricultural products according to claim 4, characterized in that, A sealing plug (605) is slidably connected to one end of the sliding sleeve (603), and a fixing plate (606) is fixed to one side of the sealing plug (605). The fixing plate (606) is fixedly connected to the sample preparation cylinder (308). A sealing block (607) is slidably connected to the inside of the sealing plug (605), and the sealing block (607) is fixedly connected to the sliding sleeve (603).

6. The heavy metal detector for agricultural products according to claim 1, characterized in that, The internal part of the housing (1) is slidably connected to a filter frame (9), and a drain valve (10) is provided on the lower side of the housing (1).

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