A device and method for detecting pesticide residues in rice

Abstract

The application provides a device and method for detecting pesticide residues of rice, and belongs to the field of pesticide residue detection equipment, which comprises a shell and a servo motor, the middle part of the side wall of the shell is penetrated by the servo motor, the middle part of the shell is penetrated by a feeding pipe, and the middle position of the feeding pipe is provided with a distribution mechanism below. In the application, the inner cylinder, the screen and the distribution plate are arranged, the materials in the inner cylinder are screened through the screen, the particulate matter passing through the screen falls into the inner side of the distribution plate, the particulate matter that is not fine enough is refined by the shearing force and friction generated when the distribution plate and the inner cylinder rotate relative to each other, at the same time, the inner cylinder also has a displacement along the vertical direction, the gap between the inner cylinder and the distribution plate is always unchanged, and under the cooperation of the distribution plate and the inner cylinder, the particulate matter is finely refined, and good working efficiency is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of pesticide residue detection equipment, and in particular to a device and method for detecting pesticide residues in rice. Background Art

[0002] As one of the main food crops, rice has rich nutritional and economic value. The relationship between high-quality rice and pesticide residues is complex and mutually influential. There may be contradictions such as pesticide abuse threatening quality and safety, but there may also be situations where scientific management can achieve coordinated prevention and control to improve quality. High-quality rice and pesticide residues are not irreconcilable. Through the selection and breeding of resistant varieties, precise prevention and control technologies, precise detection technologies and full industry chain management, it is possible to ensure rice quality and control pesticide residues within the safety threshold. Through continuous technological innovation in rice pesticide residue detection devices, a closed-loop linkage of precise monitoring, risk prevention and control and standardized production is formed, which will promote the upgrade of the rice industry from "yield-oriented" to "equal emphasis on quality and safety". At the same time, detection technology will also become one of the core competitive advantages of high-quality rice in participating in global competition.

[0003] Among the currently disclosed pesticide residue detection technologies, the adjustable intelligent detection mechanism suitable for outdoor agricultural product pesticide residue detection with announcement number CN116593658A is provided with a crushing mechanism on the detection mechanism. When checking for pesticide residues in fruits and vegetables, the crushing rod can quickly cut and crush the agricultural products inside the crushing chamber. The crushing rod can be continuously moved up and down to adjust its position, which is more efficient in cutting large agricultural products into small particles. The grinding block can then be rotated to grind the small particles of the agricultural products, completely squeeze out the juice of the agricultural products, and extract the pesticide residues in various parts of the agricultural products, making the data detected by the agricultural product pesticide detector more accurate.

[0004] However, when the device is used in the actual testing process, the gap between the grinding block and the crushing chamber is in a changing process under the action of the slider and the wavy chute. When the gap between the grinding block and the crushing chamber increases, it is difficult to play the grinding role, resulting in low working efficiency.

[0005] Therefore, in order to solve the above problems, a device and method for detecting pesticide residues in rice are provided. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a device and method for detecting pesticide residues in rice to solve the problem of low grinding efficiency raised in the above background technology.

[0007] To solve the above technical problems, this application provides the following technical solutions:

[0008] A device and method for detecting pesticide residues in rice, comprising a housing and a servo motor, wherein the servo motor penetrates the middle of a side wall of the housing, a feed pipe penetrates the middle of the housing, and a material distribution mechanism is provided below the middle of the feed pipe;

[0009] The material distribution mechanism includes: an inner cylinder, a crushing knife, a screen, a connecting block, a connecting groove and a limiting groove. The inner cylinder is provided with a central through hole through the feed pipe, the crushing knife is provided with a bottom side wall through the inner cylinder, the screen is provided on the outer peripheral side wall of the inner cylinder, the connecting block is provided on the side wall of the inner cylinder, the outer side of the connecting block is clamped with a connecting groove, one end of the connecting groove is connected to the bottom surface of the feed pipe, and the limiting groove is provided on one side of the bottom of the inner cylinder

[0010] The bottom of the inner cylinder is further provided with a screening mechanism, which includes: an outer cylinder, a material dividing plate, a crankshaft, a sliding sleeve, a connecting rod and a wedge block. The outer cylinder with a hollow bottom is sleeved on the middle part of the outer side of the inner cylinder, the material dividing plate is arranged on the inner bottom surface of the outer cylinder, the crankshaft is fixedly connected to the bottom center of the outer cylinder, the sliding sleeve is clamped on the outer side of the connecting journal of the crankshaft, the connecting rod is fixed to the side wall of the sliding sleeve, the wedge block is connected to the top of the connecting rod, and the wedge block is slidably engaged with the limiting groove;

[0011] The servo motor establishes a transmission relationship with the crankshaft, the crankshaft establishes a transmission relationship with the crushing knife, and a pesticide detector is provided on one side of the bottom of the shell.

[0012] Preferably, the top surface of the inner cylinder is flush with the inner bottom surface of the feed pipe, the inner side wall of the inner cylinder is provided with a screen in an annular array, the bottom edge of the screen is flush with the inner bottom surface of the inner cylinder, and the top edge of the screen is arranged higher than the top edge of the crushing knife.

[0013] Preferably, the number of the limiting grooves is two, and the two limiting grooves are symmetrically arranged on both sides of the bottom of the inner cylinder, and the bottom opening groove of the limiting groove includes an inclined wall surface.

[0014] Preferably, a discharge channel is provided between the vertical wall of the outer cylinder and the vertical wall of the dividing plate. The height of the dividing plate is half of the height of the outer cylinder. The dividing plate is annular and is sleeved on the lower outer side of the inner cylinder. The upper edge of the dividing plate is provided above the upper edge of the screen.

[0015] Preferably, the inner wall surface of the dividing plate is embedded with grinding blocks distributed at equal intervals, the grinding blocks are annular, and the dividing plate is coaxially arranged with the outer cylinder.

[0016] Preferably, a guide plate is provided in the middle of the outer side wall of the distribution plate, and the guide plates are evenly distributed around the circumference of the distribution plate.

[0017] Preferably, the pesticide detector is arranged below the outer cylinder, a feed port is provided on one side of the top of the pesticide detector, and an inclined collecting plate is connected to the top edge of the pesticide detector.

[0018] Preferably, a limiting mechanism is provided at the inner top end of the shell, and the limiting mechanism includes: an electric push rod and a pressure plate, one end of the electric push rod is fixed to the inner top end of the shell, and the pressure plate is fixed to the other end of the electric push rod, and the pressure plate is coaxially arranged with the inner cylinder.

[0019] Preferably, a groove is provided at the center of the bottom of the pressing plate, and the diameter of the groove at the bottom of the pressing plate is the same as the diameter of the crushing knife.

[0020] Another aspect of the present application provides a method for detecting pesticide residues in rice:

[0021] S1: Place the rice to be tested into the feeding tube, and place the part of the rice to be tested on top of the inner cylinder;

[0022] S2: Start the servo motor to drive the crankshaft and the crushing knife to rotate. During the rotation of the crankshaft, the sliding sleeve is driven to move back and forth in the horizontal direction. During the horizontal movement of the sliding sleeve, the wedge is driven to squeeze the limit groove;

[0023] S3: The limiting groove drives the inner cylinder to move vertically into the feeding pipe, and the edge of the inner cylinder is used to cut the rice into segments;

[0024] S4: The segmented rice is crushed by a rotating crushing knife, and the crushed rice is screened through a screen to select particles that meet the requirements;

[0025] S5: The outer cylinder and the distributor plate are driven to rotate by the rotation of the crankshaft. The rotating distributor plate further impacts and disperses the particles screened from the screen.

[0026] S6: The falling particles enter the detection port of the pesticide detector for detection to determine the pesticide residue.

[0027] Compared with the prior art, this application has at least the following beneficial effects:

[0028] In the present invention, an inner cylinder, a screen and a dividing plate are provided, and the material in the inner cylinder is screened by the screen. The particles passing through the screen fall into the inner side of the dividing plate. For the particles that do not meet the refinement requirements, they are refined by the shear force and friction force generated by the relative rotation of the dividing plate and the inner cylinder. At the same time, the inner cylinder also has a vertical displacement, and the gap between the inner cylinder and the dividing plate is always unchanged. With the organic cooperation of the dividing plate and the inner cylinder, a good refinement effect is achieved for the particles, and good working efficiency is guaranteed.

[0029] In the present invention, a feed pipe, an inner cylinder, a crankshaft, a sliding sleeve, a connecting rod, a wedge block and a limit groove are provided, and the wedge block and the limit groove are organically coordinated to realize the up and down displacement of the inner cylinder, and the rice plants in the feed pipe are squeezed by the top surface of the inner cylinder. With the organic coordination between the outer edge of the top surface of the inner cylinder and the through hole at the bottom of the feed pipe, the rice plants in the feed pipe are cut into small segments, which is beneficial to the subsequent crushing and refinement.

[0030] In the present invention, a feed pipe, an electric push rod and a pressure plate are provided. When the electric push rod is extended, it drives the pressure plate to pass through the middle through hole of the feed pipe. The pressure plate can squeeze and limit the material in the feed pipe. When the bottom edge of the pressure plate moves relative to the top inner edge of the inner cylinder, the shear force generated can be used to cut rice plants.

[0031] In the present invention, by arranging an outer cylinder, a material dividing plate and a guide plate, the guide plate in the discharge channel rotates with the material dividing plate and the outer cylinder. During the rotation process, the inclined surface of the guide plate itself has an extrusion effect on the airflow in the discharge channel, thereby driving the airflow to further quickly discharge the material, and dispersing the material through the airflow to prevent the material from agglomerating. The evenly arranged guide plates can also extrude and impact the material in the discharge channel to disperse it. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0033] Figure 1 This is a schematic diagram of the overall structure of this application;

[0034] Figure 2 This is a cross-sectional view of the shell structure in this application;

[0035] Figure 3 This is a schematic diagram of the crankshaft structure in this application;

[0036] Figure 4 This is a schematic diagram of the feed pipe structure in this application;

[0037] Figure 5 This is a schematic diagram of the overall structure of the inner cylinder in this application;

[0038] Figure 6 This is a schematic diagram of the cross-sectional structure of the inner cylinder in this application;

[0039] Figure 7 This is a schematic diagram of the cross-sectional structure of the outer cylinder in this application;

[0040] Figure 8 This is a schematic diagram of the aggregate trough structure in this application;

[0041] Figure 9 This is a schematic diagram of the cross-sectional structure of the pressure plate in this application;

[0042] [Reference Signs]

[0043] 1. Housing; 101. Servo motor; 102. Feed pipe; 103. Pesticide detector; 1031. Collecting plate; 2. Inner cylinder; 201. Crushing knife; 202. Screen; 203. Connecting block; 204. Connecting slot; 205. Limiting slot; 3. Outer cylinder; 301. Separating plate; 3011. Grinding block; 3012. Guide plate; 302. Crankshaft; 303. Sleeve; 304. Connecting rod; 305. Wedge; 4. Electric push rod; 401. Press plate. DETAILED DESCRIPTION

[0044] The following describes in detail, with reference to the accompanying drawings and specific examples, a device and method for detecting pesticide residues in rice provided by the present application. It is also noted that, for the sake of completeness, the following examples are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known techniques. Furthermore, the accompanying drawings are provided solely for the purpose of describing the embodiments in greater detail and are not intended to limit the present application.

[0045] like Figures 1-6 The device and method for detecting pesticide residues in rice shown in the embodiment of the present application include a housing 1 and a servo motor 101. The servo motor 101 is passed through the middle of the side wall of the housing 1. A feed pipe 102 is passed through the middle of the housing 1. A material distribution mechanism is provided below the middle position of the feed pipe 102.

[0046] The material distribution mechanism includes: an inner cylinder 2, a crushing knife 201, a screen 202, a connecting block 203, a connecting groove 204 and a limiting groove 205. The inner cylinder 2 is provided with a central through hole through the feed pipe 102, the crushing knife 201 is provided through the bottom side wall of the inner cylinder 2, the screen 202 is provided on the outer peripheral side wall of the inner cylinder 2, the connecting block 203 is provided on the side wall of the inner cylinder 2, the outer side of the connecting block 203 is clamped with a connecting groove 204, one end of the connecting groove 204 is connected to the bottom surface of the feed pipe 102, and the limiting groove 205 is provided on one side of the bottom of the inner cylinder 2

[0047] The bottom of the inner cylinder 2 is also provided with a screening mechanism, which includes: an outer cylinder 3, a dividing plate 301, a crankshaft 302, a sleeve 303, a connecting rod 304 and a wedge 305. The outer cylinder 3 with a hollow bottom is sleeved on the middle part of the outer side of the inner cylinder 2, the dividing plate 301 is arranged on the inner bottom surface of the outer cylinder 3, the crankshaft 302 is fixedly connected to the bottom center of the outer cylinder 3, the sleeve 303 is clamped on the outer side of the connecting journal of the crankshaft 302, the connecting rod 304 is fixed to the side wall of the sleeve 303, the wedge 305 is connected to the top of the connecting rod 304, and the wedge 305 is slidably engaged with the limiting groove 205;

[0048] The servo motor 101 establishes a transmission relationship with the crankshaft 302, and the crankshaft 302 establishes a transmission relationship with the crushing blade 201. A pesticide detector 103 is provided on one side of the bottom of the housing 1;

[0049] A visual window is provided at the upper front side of the housing 1, through which the interior of the housing 1 can be effectively observed. Both ends of the feed pipe 102 are open, and through holes are provided above and below the middle of the feed pipe 102.

[0050] When in use, the rice plant to be inspected is inserted into the feeding tube 102 so that the part to be inspected is at the top of the inner cylinder 2. The rice plant is limited by the feeding tube 102, and the servo motor 101 is started to drive the crankshaft 302 and the crushing knife 201 to rotate. During the rotation of the crankshaft 302, the sliding sleeve 303 is squeezed by the connecting journal of the crankshaft 302 to produce horizontal reciprocating motion, driving the connecting rod 304 and the wedge block 305 to reciprocate in the horizontal direction. The wedge block 305 is clamped inside the limiting groove 205, and the limiting groove 205 is squeezed by the inclined surface of the wedge block 305, so that the limiting groove 205 moves in the vertical direction. The limiting groove 205 drives the inner cylinder 2 to move in the vertical direction, and the rice plant in the feeding tube 102 is squeezed through the top surface of the inner cylinder 2. Under the organic cooperation between the outer edge of the top surface of the inner cylinder 2 and the through hole at the bottom of the feeding tube 102, the rice plant in the feeding tube 102 is cut into small segments.

[0051] Small pieces of rice fall into the inner cylinder 2 under the action of their own gravity. At this time, as the crushing knife 201 rotates, the small pieces of rice are crushed and refined. In this process, since the crushing knife 201 and the inner cylinder 2 are sealed by a sealing ring and the crushing knife 201 and the inner cylinder 2 can slide relative to each other, the crushing knife 201 is in a relative sliding process relative to the inner cylinder 2, thereby being able to crush and refine rice at different positions in the inner cylinder 2. Driven by the crushing knife 201, the refined particles move, including the particles moving toward the screen 202 under the action of centrifugal force, thereby achieving simultaneous crushing and screening, improving work efficiency, and with the organic cooperation of the connecting block 203 and the connecting groove 204, the inner cylinder 2 has a limiting and guiding effect.

[0052] The particles that pass through the screen 202 fall into the inner side of the dividing plate 301. The gap set at the part of the dividing plate 301 that fits the outer wall of the inner cylinder 2 is the same as the diameter of the particles to be obtained. Therefore, for particles that do not meet the refinement requirements, they will be refined by the shear force and friction force generated by the relative rotation of the dividing plate 301 and the inner cylinder 2. At the same time, the inner cylinder 2 also has a vertical displacement, so the force acting on this part of the particles is constantly changing, while the gap between the inner cylinder 2 and the dividing plate 301 is always unchanged. Under the organic cooperation of the dividing plate 301 and the inner cylinder 2, a good refinement effect is achieved for the particles, and good working efficiency is guaranteed.

[0053] Under the rotation of the crankshaft 302, the dividing plate 301 and the outer cylinder 3 are driven to rotate continuously, and the refined particles can be discharged through the hollow outer cylinder 3. The falling particles enter the detection port of the pesticide detector 103 for detection to determine the pesticide residue.

[0054] In this embodiment, Figure 2-Figure 9 As shown. The top surface of the inner cylinder 2 is flush with the inner bottom surface of the feed pipe 102, the inner side wall of the inner cylinder 2 has a ring array of screen 202, the bottom edge of the screen 202 is flush with the inner bottom surface of the inner cylinder 2, and the top edge of the screen 202 is higher than the top edge of the crushing knife 201;

[0055] The inner cylinder 2 moves vertically in cooperation with the limiting groove 205 and the wedge 305. The feed tube 102 is a tubular structure with a rectangular opening. The inner cylinder 2 moves relative to the two horizontal portions of the feed tube 102. The inner cylinder 2 can move upward to the through hole in the top surface of the feed tube 102. Under the action of pressure, the rice plants in the feed tube 102 can be cut to facilitate subsequent crushing.

[0056] The annular array of screens 202 effectively utilizes the area of ​​the inner wall of the inner cylinder 2, thereby quickly screening out qualified particles, reducing the repeated crushing of particles, and enabling the crushing knife 201 to efficiently crush and refine particles that do not meet the refining requirements. The bottom edge of the screen 202 is flush with the bottom surface of the inner cylinder 2, which helps to discharge the material in the inner cylinder 2. The material is often driven by the crushing knife 201 to accumulate at the corners of the inner cylinder 2. Therefore, the top edge of the screen 202 is designed to be higher than the crushing knife 201, which can help maintain good discharge efficiency.

[0057] There are two limiting grooves 205 symmetrically arranged on both sides of the bottom of the inner cylinder 2 . The bottom opening of the limiting groove 205 includes an inclined wall surface.

[0058] The two limiting grooves 205 correspond to the two directions of the horizontal reciprocating movement of the sliding sleeve 303 , and the inclined surfaces of the limiting grooves 205 can fit with the inclined surfaces of the wedge block 305 to ensure the contact area, thereby ensuring the smoothness of the transmission.

[0059] A discharge channel is provided between the vertical wall of the outer cylinder 3 and the vertical wall of the dividing plate 301. The height of the dividing plate 301 is half of the height of the outer cylinder 3. The dividing plate 301 is annular and is sleeved on the lower outer side of the inner cylinder 2. The upper edge of the dividing plate 301 is higher than the upper edge of the screen 202.

[0060] The material falling from the outside of the top of the dividing plate 301 falls into the discharge channel under the action of centrifugal force. There is a height difference between the top surface of the dividing plate 301 and the top surface of the outer cylinder 3, which can prevent the material from flowing outward and ensure that the discharge direction of the material is downward. The dividing plate 301 is designed to be annular, and the dividing plate 301 is set higher than the upper edge of the screen 202. It can prevent the material from falling directly after being discharged from the screen 202, so that the dividing plate 301 can organically cooperate with the inner cylinder 2 to refine and shape the material that does not meet the refinement requirements.

[0061] The inner wall of the dividing plate 301 is embedded with equally spaced grinding blocks 3011, which are annular in shape. The dividing plate 301 is coaxially arranged with the outer cylinder 3;

[0062] A grinding block 3011 is set on the inner side of the dividing plate 301 to increase the surface roughness, increase the friction coefficient, and improve the grinding efficiency and grinding effect. The grinding block 3011 is annular, corresponding to the moving direction of the material, ensuring good grinding of the material. At the same time, a coaxial setting is used to improve the rotation stability of the dividing plate 301.

[0063] The inner wall of the dividing plate 301 is embedded with grinding blocks 3011 distributed at equal intervals. The grinding blocks 3011 are annular. The dividing plate 301 is coaxial with the outer cylinder 3.

[0064] A guide plate 3012 is provided in the middle of the outer wall of the dividing plate 301, and the guide plates 3012 are evenly distributed around the circumference of the dividing plate 301;

[0065] The guide plate 3012 in the discharge channel rotates along with the dividing plate 301 and the outer cylinder 3. During the rotation, the inclined surface of the guide plate 3012 itself has an extrusion effect on the airflow in the discharge channel, thereby driving the airflow to further quickly discharge the material and disperse the material through the airflow to prevent the material from clumping. The evenly arranged guide plates 3012 can also extrude and impact the material in the discharge channel.

[0066] The pesticide detector 103 is arranged below the outer cylinder 3. A feed port is provided on one side of the top of the pesticide detector 103. The top edge of the pesticide detector 103 is connected to an inclined collecting plate 1031.

[0067] The pesticide detector 103 is a mass spectrometer that can detect pesticide residues in materials. The material discharged from the bottom of the outer cylinder 3 is collected by the inclined collection plate 1031, and the inclined surface promotes the flow of the material, allowing the material to enter the detection port of the pesticide detector 103, thereby improving convenience.

[0068] A limiting mechanism is provided at the top of the inner portion of the housing 1. The limiting mechanism includes: an electric push rod 4 and a pressure plate 401. One end of the electric push rod 4 is fixed to the top of the inner portion of the housing 1. The pressure plate 401 is fixed to the other end of the electric push rod 4. The pressure plate 401 is coaxially arranged with the inner cylinder 2.

[0069] When the electric push rod 4 is extended, it drives the pressing plate 401 to move toward the inner cylinder 2, until the pressing plate 401 extends into the inner cylinder 2, squeezing the material in the inner cylinder 2, so that the material moves toward the crushing knife 201, so that the material can fully contact the crushing knife 201;

[0070] When the electric push rod 4 is extended, it drives the pressure plate 401 to pass through the middle through hole of the feed pipe 102. The pressure plate 401 can squeeze and limit the material in the feed pipe 102. When the bottom edge of the pressure plate 401 moves relative to the top inner edge of the inner cylinder 2, the shear force generated can be used to cut rice plants.

[0071] A groove is provided at the center of the bottom of the pressing plate 401. The diameter of the groove at the bottom of the pressing plate 401 is the same as the diameter of the crushing blade 201.

[0072] The bottom surface of the pressing plate 401 can be close to the inner bottom surface of the inner cylinder 2. Under the action of pressure, the material in the inner cylinder 2 is squeezed without interfering with the rotation of the crushing knife 201, which is more flexible in use.

[0073] Furthermore, a detection method for a device for detecting pesticide residues in rice is as follows:

[0074] S1: Place the rice to be tested into the feed pipe 102, and place the part of the rice to be tested above the inner cylinder 2;

[0075] S2: The servo motor 101 is started to rotate the crankshaft 302 and the crushing blade 201. The rotation of the crankshaft 302 drives the sleeve 303 to move back and forth in the horizontal direction. The horizontal movement of the sleeve 303 drives the wedge 305 to squeeze the limiting groove 205.

[0076] S3: The limiting groove 205 drives the inner cylinder 2 to move vertically into the feeding pipe 102, and the rice is cut into segments by the edge of the inner cylinder 2;

[0077] S4: The segmented rice is crushed by the rotating crushing blade 201, and the crushed rice is screened by the screen 202 to screen out particles that meet the requirements;

[0078] S5: The outer cylinder 3 and the distributor plate 301 are rotated by the rotation of the crankshaft 302. The rotating distributor plate 301 further impacts and disperses the particles screened from the screen 202.

[0079] S6: The falling particles enter the detection port of the pesticide detector 103 for detection to determine the pesticide residue amount.

Claims

1. A device for detecting pesticide residues in rice, comprising a housing (1) and a servo motor (101), wherein the servo motor (101) penetrates the middle of the side wall of the housing (1), and is characterized in that: A feed pipe (102) passes through the middle of the housing (1), and a material distribution mechanism is provided below the middle of the feed pipe (102); The material distribution mechanism comprises: an inner cylinder (2), a crushing knife (201), a screen (202), a connecting block (203), a connecting groove (204) and a limiting groove (205); the inner cylinder (2) is arranged to pass through the middle through hole of the feed pipe (102); the crushing knife (201) is arranged to pass through the bottom side wall of the inner cylinder (2); the screen (202) is arranged on the outer peripheral side wall of the inner cylinder (2); the connecting block (203) is arranged on the side wall of the inner cylinder (2); the outer side of the connecting block (203) is clamped with a connecting groove (204); one end of the connecting groove (204) is connected to the bottom surface of the feed pipe (102); and the limiting groove (205) is arranged on one side of the bottom of the inner cylinder (2); The number of the limiting grooves (205) is two, and the two limiting grooves (205) are symmetrically arranged on both sides of the bottom of the inner cylinder (2), and the bottom opening groove of the limiting groove (205) includes an inclined wall surface; The bottom of the inner cylinder (2) is also provided with a screening mechanism, which comprises: an outer cylinder (3), a material dividing plate (301), a crankshaft (302), a sleeve (303), a connecting rod (304) and a wedge (305). The outer cylinder (3) with a hollow bottom is sleeved on the middle part of the outer side of the inner cylinder (2), the material dividing plate (301) is provided on the inner bottom surface of the outer cylinder (3), the crankshaft (302) is fixedly connected to the bottom center of the outer cylinder (3), the sleeve (303) is clamped to the outer side of the connecting journal of the crankshaft (302), the connecting rod (304) is fixed to the side wall of the sleeve (303), the wedge (305) is connected to the top of the connecting rod (304), and the wedge (305) is in sliding engagement with the limiting groove (205); The servo motor (101) and the crankshaft (302) establish a transmission relationship, and the crankshaft (302) and the crushing blade (201) establish a transmission relationship. A pesticide detector (103) is provided on one side of the bottom of the housing (1); A limiting mechanism is provided at the inner top end of the shell (1), and the limiting mechanism comprises: an electric push rod (4) and a pressure plate (401), one end of the electric push rod (4) is fixed to the inner top end of the shell (1), and the pressure plate (401) is fixed to the other end of the electric push rod (4), and the pressure plate (401) is coaxially arranged with the inner cylinder (2).

2. The device for detecting pesticide residues in rice according to claim 1, characterized in that: The top surface of the inner cylinder (2) is flush with the inner bottom surface of the feed pipe (102), and the inner side wall of the inner cylinder (2) is provided with a screen (202) in an annular array. The bottom edge of the screen (202) is flush with the inner bottom surface of the inner cylinder (2), and the top edge of the screen (202) is arranged higher than the top edge of the crushing knife (201).

3. The device for detecting pesticide residues in rice according to claim 1, characterized in that: A discharge channel is provided between the vertical wall surface of the outer cylinder (3) and the vertical wall surface of the dividing plate (301). The height of the dividing plate (301) is half of the height of the outer cylinder (3). The dividing plate (301) is annular and is sleeved on the lower outer side of the inner cylinder (2). The upper edge of the dividing plate (301) is higher than the upper edge of the screen (202).

4. The device for detecting pesticide residues in rice according to claim 1, characterized in that: The inner wall surface of the material dividing plate (301) is embedded with grinding blocks (3011) distributed at equal intervals, and the grinding blocks (3011) are annular. The material dividing plate (301) is coaxially arranged with the outer cylinder (3).

5. The device for detecting pesticide residues in rice according to claim 1, characterized in that: A guide plate (3012) is provided in the middle of the outer side wall of the material distribution plate (301), and the guide plates (3012) are evenly distributed circumferentially around the material distribution plate (301).

6. The device for detecting pesticide residues in rice according to claim 1, characterized in that: The pesticide detector (103) is arranged below the outer cylinder (3), a feed port is provided on one side of the top of the pesticide detector (103), and an inclined collecting plate (1031) is connected to the top edge of the pesticide detector (103).

7. The device for detecting pesticide residues in rice according to claim 1, characterized in that: A groove is provided at the center of the bottom of the pressing plate (401), and the diameter of the groove at the bottom of the pressing plate (401) is the same as the diameter of the crushing knife (201).

8. The detection method of the device for detecting pesticide residues in rice according to any one of claims 1 to 7, characterized in that: S1: Place the rice to be tested into the feed pipe (102), and place the part of the rice to be tested above the inner cylinder (2); S2: starting the servo motor (101), driving the crankshaft (302) and the crushing blade (201) to rotate, the crankshaft (302) driving the sliding sleeve (303) to reciprocate in the horizontal direction during the rotation process, and the sliding sleeve (303) driving the wedge block (305) to squeeze the limiting groove (205) during the horizontal movement process; S3: The limiting groove (205) drives the inner cylinder (2) to move vertically to the inside of the feeding pipe (102), and the rice is cut and segmented by the edge of the inner cylinder (2); S4: crushing the segmented rice with a rotating crushing knife (201), and screening the crushed rice with a screen (202) to select particles that meet the requirements; S5: The outer cylinder (3) and the distribution plate (301) are driven to rotate by the rotation of the crankshaft (302), and the rotating distribution plate (301) further impacts and disperses the particles screened from the screen (202); S6: The falling particles enter the detection port of the pesticide detector (103) for detection to determine the pesticide residue amount.

Images