Rapid detection device for pesticide residues of rhizome agricultural products

Abstract

The present invention discloses a rhizome agricultural product pesticide residue rapid detection apparatus, and relates to the technical field of agricultural product pesticide residue detection, the rhizome agricultural product pesticide residue rapid detection apparatus comprises a housing, detection test paper is placed on the outer wall of the top of the housing, and the top of the housing is rotatably connected with a cover plate for pressing the detection test paper; one side of the cover plate is provided with a positioning assembly for avoiding displacement of the test paper in the pressing process, the top of the shell is provided with an adsorption assembly for conveniently and rapidly placing and fixing the test paper, and a clamping assembly for fixing the test paper is arranged above the shell. The whole process from test paper fixation, reaction promotion to detection completion is automatically operated, the detection efficiency of the pesticide residues of the rhizome agricultural products is improved, and the requirement for rapid screening of a large number of samples in the scenes of agricultural product production sites, farmer markets and the like is met.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide residue detection in agricultural products, and in particular to a rapid detection device for pesticide residue in root and tuber agricultural products. Background Art

[0002] Root and tuber agricultural products, such as potatoes, sweet potatoes, carrots, etc., occupy an important position in agricultural production and people's daily diet. They are not only the key raw materials for many food processing industries, but also an important agricultural product category to ensure food security and meet people's nutritional needs. However, in the process of their growth, in order to resist the invasion of pests and diseases, pesticides are often needed, which leads to the problem of pesticide residues in root and tuber agricultural products. Excessive pesticide residues will not only endanger the health of consumers, but long-term intake may cause various diseases. It will also have a negative impact on the export trade of agricultural products and reduce the competitiveness of my country's agricultural products in the international market. For the detection of pesticide residues in root and tuber agricultural products, conventional methods mainly include laboratory detection technologies such as gas chromatography and liquid chromatography. Although these methods have accurate test results, they have defects such as cumbersome detection process, expensive equipment and long detection time, which makes it difficult to meet the needs of rapid screening of a large number of samples in scenes such as agricultural product production sites and farmers' markets. At present, test paper detection methods are mostly used to detect pesticide residues in scenes such as agricultural product production sites and farmers' markets, but traditional test paper detection requires manual pinching reaction, and the entire detection process takes a long time. At the same time, one person can only test one group of samples at a time, and the detection efficiency is slow. For a small number of rapid detection devices on the market, in actual use, either the test paper cannot be effectively fixed, resulting in the test paper being easily displaced during the detection process, affecting the detection accuracy, or the reaction promotion means for the test paper is single, and the reaction efficiency cannot be significantly accelerated, making the detection time-consuming. Therefore, there is an urgent need for a rapid detection device for pesticide residues in root and tuber agricultural products to solve the above problems. Summary of the invention

[0003] In view of the problems in the related art, the present invention proposes a rapid detection device for pesticide residues in root and tuber agricultural products to overcome the above-mentioned technical problems existing in the existing related art.

[0004] The technical solution of the present invention is achieved in this way: A rapid detection device for pesticide residues in root and tuber agricultural products, comprising a housing, a test paper placed on the top outer wall of the housing, a cover plate for pressing the test paper rotatably connected to the top of the housing, and a positioning component for preventing displacement of the test paper during the pressing process is provided on one side of the cover plate; The top of the housing is provided with an adsorption component for facilitating the rapid placement and fixation of the test paper; A clamping assembly for fixing the test paper is provided above the housing; The adsorption component includes a placement groove opened on the top outer wall of the shell, the inspection area in the test paper is located inside the placement groove, one end of the paper body is pressed against the inner wall of one side of the placement groove, a fan is fixedly connected to the outer wall of one side of the shell, and the upper and lower sides of the fan are respectively fixedly connected to the suction pipe and the exhaust pipe, one end of the suction pipe is fixedly connected to the second connecting pipe, and the top inner wall of the shell is fixedly connected to the sealing cover distributed at an equal distance, the sealing cover is located directly below the placement groove, and the bottom inner wall of the placement groove is opened with a second adsorption hole, the second adsorption hole is connected to the sealing cover, and one sealing cover is connected to the other sealing cover through a third connecting pipe; A pressing component for accelerating the reaction efficiency between the reaction area and the inspection area in the test paper is arranged on one side of the cover plate.

[0005] Further, the positioning assembly includes an extension shell fixedly connected to the top of the shell, both sides of the cover plate are fixedly connected with a rotating shaft, one end of the rotating shaft is rotatably connected to the inner wall of the extension shell, the circumferential outer wall of the rotating shaft is fixedly connected with a first bevel gear, the circumferential outer wall of the first bevel gear is meshed with a second bevel gear, the circumferential inner wall of the second bevel gear is fixedly connected with a first threaded screw, the circumferential outer wall of the first threaded screw is threadedly connected with a first threaded sleeve, a pressure column is fixedly connected to an outer wall of one side of the first threaded sleeve, a through groove is provided on one side of the extension shell, the pressure column passes through the inside of the through groove, the inner wall of the extension shell is fixedly connected with a fixing plate, and the first threaded screw is rotatably connected to the fixing plate.

[0006] Furthermore, a first guide column is fixedly connected to an outer wall of one side of the other fixed plate, a first guide cylinder is slidably connected to a circumferential outer wall of the first guide column, and the first guide cylinder is fixedly connected to the pressure column.

[0007] Furthermore, the clamping assembly includes a compression shell fixedly connected to the outer wall of one side of the cover plate, a partition is fixedly connected to the interior of the compression shell, the interior of the compression shell is divided into a liquid storage area and an adsorption area by the partition, and the outer wall of one side of the compression shell is provided with first adsorption holes distributed at equal distances, the first adsorption holes are connected to the adsorption area, a hose is fixedly connected to the circumferential outer wall of the suction pipe, the other end of the hose is fixedly connected to a fixed pipe, one end of the fixed pipe is fixedly connected to a transverse pipe, the circumferential outer wall of the transverse pipe is fixedly connected to a first connecting pipe, and the first connecting pipe extends to the interior of the adsorption area away from one end of the transverse pipe.

[0008] Furthermore, a water tank is fixedly connected to an outer wall of one side of the cover plate, a heating pipe and a temperature sensor are respectively provided on the top outer wall of the water tank, the cross pipe is fixedly connected to the bottom outer wall of the water tank, a sealing bag is fixedly connected to the interior of the compression shell, the sealing bag is located inside the liquid storage area, the water tank, the cover plate and one side of the compression shell are all provided with liquid guide holes, and the water tank is connected to the liquid storage area inside the compression shell through the liquid guide holes.

[0009] Furthermore, the liquid level of the hot water in the water tank is flush with the liquid level of the hot water in the liquid storage area, and the liquid level is located at the central axis of the liquid guide hole.

[0010] Further, the clamping assembly includes a driving wheel fixedly connected to the circumferential outer wall of another rotating shaft, the circumferential outer wall of the driving wheel is transmission-connected with a transmission belt, the driving wheel is transmission-connected to a transmission wheel through the transmission belt, the circumferential inner wall of the transmission wheel is fixedly connected with a second threaded screw, the circumferential outer wall of the second threaded screw is provided with double thread grooves distributed at equal distances, the circumferential outer wall of the second threaded screw is threadedly connected with a second threaded sleeve, the top outer wall of the second threaded sleeve is fixedly connected with a slide, and the top of the slide is fixedly connected with a clamping plate.

[0011] Furthermore, a sliding groove is provided on the inner wall of the bottom of the placement groove, and one end of the sliding plate passes through the inside of the sliding groove.

[0012] Furthermore, the inner walls on both sides of the shell are fixedly connected with second guide rods, the circumferential outer wall of the second guide rods is slidably connected with a second guide cylinder, and the second guide cylinder is fixedly connected to the clamping plate through the slide plate.

[0013] Furthermore, a buckle is fixedly connected to an outer wall on one side of the cover plate, a slot is provided on the top outer wall of the shell, the buckle and the slot are engaged with each other, an elastic pad is provided on an inner wall on one side of the slot for improving the locking effect of the buckle, a switch is fixedly connected to an inner wall on one side of the slot, a control panel is fixedly connected to an outer wall on one side of the shell, and the switch is electrically connected to the control panel and the fan.

[0014] Beneficial effects of the present invention: The invention provides a rapid detection device for pesticide residues in root and tuber agricultural products. Through the adsorption component, after the fan is started, negative pressure is generated in the sealing cover below the placement slot through the suction pipe, the second connecting pipe, and the sealing cover and the third connecting pipe that are interconnected. The second adsorption hole at the bottom of the placement slot transmits the negative pressure to the inspection area of ​​the test paper. At the same time, the adsorption area in the pressure shell generates negative pressure under the action of the fan through the hose, the fixed pipe, the transverse pipe and the first connecting pipe connected to the suction pipe, and acts on the reaction area of ​​the test paper through the first adsorption hole. This negative pressure suction realizes the initial fixation of the test paper, effectively preventing the test paper from being skewed and loose when placed, and laying a foundation for subsequent accurate detection. The present invention provides a rapid detection device for pesticide residues in root and tuber agricultural products. Through the provided positioning component, when the cover plate rotates, the rotating shafts on both sides are driven to rotate synchronously. One group of rotating shafts rotates, causing the first bevel gear fixed to the circumferential outer wall to rotate accordingly. Since the first bevel gear is meshed with the second bevel gear, the second bevel gear and the first threaded screw fixed thereto are driven to rotate. When the first threaded screw rotates, the first threaded sleeve threadedly connected thereto moves along its axial direction, driving the pressure column to pass through the through groove on one side of the extension shell, folding the paper body in half along the center line and pressing it tightly. This process ensures that the reaction area and the inspection area in the test paper can be accurately contacted, thereby improving the detection accuracy. When the detection is completed and the cover plate is opened, the rotating shaft rotates in the opposite direction, and the pressure column is reset to the initial position, which is convenient for subsequent taking and placing of the test paper. The invention provides a rapid detection device for pesticide residues in root and tuber agricultural products. Through the provided clamping assembly, during the closing process of the cover plate, another rotating shaft drives the driving wheel to rotate, and the driving wheel is connected to the driving wheel through a transmission belt, thereby driving the driving wheel to rotate, and the second threaded screw fixed to the driving wheel performs circular motion accordingly. Since the circumferential outer wall of the second threaded screw is provided with double thread grooves distributed at equal distances, the second threaded sleeves threadedly connected to the outer wall thereof move toward each other in pairs, and the second threaded sleeves drive the slide plate at the top to slide in the slide groove at the bottom of the placement groove, and at the same time, the clamping plate at the top of the slide plate aligns the paper body in the center. This design corrects the skew deviation that may occur when the test paper is manually placed, and avoids the reaction area and the inspection area from being unable to fully react in the subsequent reaction process.

[0015] The invention provides a rapid detection device for pesticide residues in root and tuber agricultural products. Through the provided pressing assembly, when the cover plate is closed, the water tank, the cover plate and the liquid guide hole on one side of the pressing shell are connected, and the hot water in the water tank preheated to about 37° flows into the liquid storage area in the pressing shell. As the hot water in the liquid storage area increases, the sealing bag located therein is stretched open, and the sealing bag is tightly pressed above the reaction area of ​​the paper body under the action of the gravity of the hot water. On the one hand, the gravity makes the reaction area and the inspection area fit more closely, which is conducive to the full reaction of the substance. On the other hand, the temperature of the hot water accelerates the reaction process. , and this water bath heating method can make the heating area larger and more uniform, without heating dead corners, and significantly improve the accuracy of the test results. In addition, when the cover is closed, the buckle on one side of the cover is inserted into the slot on the top of the shell, and the switch in the slot is squeezed to open it. The motor in the fan reverses, and the first adsorption hole and the second adsorption hole generate positive pressure blowing force. The positive pressure blowing force further presses the reaction area and the inspection area tightly during the reaction process to promote the full reaction. After the reaction is completed and the cover is opened, the positive pressure blowing force can blow the test paper away from the placement slot and the pressure shell, making it convenient for the staff to take the material.

[0016] The present invention provides a rapid detection device for pesticide residues in root and tuber agricultural products. Through the coordinated work of an adsorption component, a positioning component, a clamping component and a pressing component, multiple samples can be detected simultaneously. Compared with the traditional detection method which requires manual pinching reaction and can only detect one group of samples at a time, the device realizes automated operation in the entire process from test paper fixation, reaction promotion to detection completion, thereby improving the detection efficiency of pesticide residues in root and tuber agricultural products and meeting the needs for rapid screening of a large number of samples in scenarios such as agricultural product production sites and farmers' markets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall front structure of the present invention.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 3 For the present invention Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0021] Figure 4 It is a schematic diagram of the overall back structure of the present invention.

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0023] Figure 6 It is a schematic diagram of the overall structure of the housing after being disassembled.

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at D in the middle.

[0025] Figure 8 For the present invention Figure 6 Schematic diagram of the enlarged structure at E in the middle.

[0026] Fig. 9 It is a schematic diagram of the overall cross-sectional plan structure of the present invention.

[0027] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at F in the middle.

[0028] Fig.11 It is a schematic diagram of the top structure of the present invention.

[0029] In the figure: 1. Shell; 2. Control panel; 3. Card slot; 4. Cover plate; 5. Buckle; 6. Pressing assembly; 6001. Pressing shell; 6002. Sealing bag; 6003. First adsorption hole; 6004. Partition; 7. Test paper; 7001. Paper body; 7002. Reaction area; 7003. Inspection area; 8. Positioning assembly; 8001. Extension shell; 8002. Through slot; 8003. Pressing column; 8004. First bevel gear; 8005. Second bevel gear; 8006. First threaded screw rod; 8007. Fixing plate; 8008. First threaded sleeve; 8009. First guide column; 8010. First guide cylinder; 9. Clamping assembly; 9001. Clamping plate ;9002, transmission wheel; 9003, transmission belt; 9004, slide plate; 9005, slide groove; 9006, second threaded screw; 9007, second guide rod; 9008, second guide cylinder; 9009, second threaded sleeve; 9010, driving wheel; 10, sealing cover; 11, water tank; 12, heating pipe; 13, temperature sensor; 14, horizontal pipe; 15, hose; 16, suction pipe; 17, fan; 18, exhaust pipe; 19, elastic pad; 20, rotating shaft; 21, liquid guide hole; 22, fixed pipe; 23, first connecting pipe; 24, second connecting pipe; 25, second adsorption hole; 26, placement slot; 27, third connecting pipe; 28, switch. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0031] According to an embodiment of the present invention, please refer to Figure 1-Figure 11 A rapid detection device for pesticide residues in root and tuber agricultural products, comprising a housing 1, a test paper 7 placed on the top outer wall of the housing 1, a cover plate 4 for pressing the test paper 7 is rotatably connected to the top of the housing 1, and a positioning component 8 is provided on one side of the cover plate 4 to prevent the test paper 7 from shifting during the pressing process; The top of the housing 1 is provided with an adsorption component for facilitating the quick placement and fixation of the test paper 7; A clamping assembly 9 for fixing the test paper 7 is provided above the housing 1; The adsorption component includes a placement groove 26 opened on the top outer wall of the shell 1, the inspection area 7003 in the test paper 7 is located inside the placement groove 26, one end of the paper body 7001 is pressed against the inner wall of one side of the placement groove 26, a fan 17 is fixedly connected to the outer wall of one side of the shell 1, and the upper and lower sides of the fan 17 are respectively fixedly connected to the suction pipe 16 and the exhaust pipe 18, one end of the suction pipe 16 is fixedly connected to the second connecting pipe 24, and the top inner wall of the shell 1 is fixedly connected to the sealing cover 10 distributed at an equal distance, and the sealing cover 10 is located directly below the placement groove 26. The bottom inner wall of the placement groove 26 is opened with a second adsorption hole 25, and the second adsorption hole 25 is connected to the sealing cover 10, and one sealing cover 10 is connected to another sealing cover 10 through a third connecting pipe 27; A clamping assembly 6 for accelerating the reaction efficiency of the reaction area 7002 and the inspection area 7003 in the test paper 7 is provided on one side of the cover plate 4. After the fan 17 is started, a negative pressure is generated in the sealing cover 10 below the placement slot 26 through the suction pipe 16, the second connecting pipe 24, and the sealing cover 10 and the third connecting pipe 27 that are interconnected. The second adsorption hole 25 at the bottom of the placement slot 26 transmits the negative pressure to the inspection area 7003 of the test paper 7. At the same time, the adsorption area in the compression shell 6001 generates negative pressure under the action of the fan 17 through the hose 15 connected to the suction pipe 16, the fixing pipe 22, the transverse pipe 14 and the first connecting pipe 23, and acts on the reaction area 7002 of the test paper 7 through the first adsorption hole 6003. This negative pressure suction realizes the preliminary fixation of the test paper, effectively preventing the test paper from being skewed and loose when placed, and laying a foundation for subsequent accurate detection.

[0032] Preferably, the positioning assembly 8 includes an extension shell 8001 fixedly connected to the top of the shell 1, the two sides of the cover plate 4 are fixedly connected with the rotating shaft 20, one end of the rotating shaft 20 is rotatably connected to the inner wall of the extension shell 8001, the circumferential outer wall of the rotating shaft 20 is fixedly connected with the first bevel gear 8004, the circumferential outer wall of the first bevel gear 8004 is meshed with the second bevel gear 8005, the circumferential inner wall of the second bevel gear 8005 is fixedly connected with the first threaded screw 8006, the circumferential outer wall of the first threaded screw 8006 is threadedly connected with the first threaded sleeve 8008, the outer wall of one side of the first threaded sleeve 8008 is fixedly connected with a pressure column 8003, a through groove 8002 is opened on one side of the extension shell 8001, the pressure column 8003 passes through the inside of the through groove 8002, the inner wall of the extension shell 8001 is fixedly connected with a fixing plate 8007, the first threaded screw 8006 is connected to the fixing plate 8007 Rotational connection, when the cover plate 4 rotates, the rotating shafts 20 on both sides are driven to rotate synchronously, and one group of the rotating shafts 20 rotates, so that the first bevel gear 8004 fixed to the circumferential outer wall rotates accordingly. Since the first bevel gear 8004 is meshed with the second bevel gear 8005, the second bevel gear 8005 and the first threaded screw 8006 fixed thereto are driven to rotate. When the first threaded screw 8006 rotates, the first threaded sleeve 8008 threadedly connected thereto moves along its axial direction, driving the pressure column 8003 to pass through the through groove 8002 on one side of the extension shell 8001, folding the paper body 7001 along the center line and pressing it tightly. This process ensures that the reaction area 7002 and the inspection area 7003 in the test paper 7 can be accurately contacted, thereby improving the detection accuracy. When the detection is completed and the cover plate 4 is opened, the rotating shaft 20 rotates in the opposite direction, and the pressure column 8003 is reset to the initial position, which is convenient for the subsequent removal and placement of the test paper 7.

[0033] Preferably, a first guide column 8009 is fixedly connected to an outer wall of one side of the other fixed plate 8007, and a first guide cylinder 8010 is slidably connected to a circumferential outer wall of the first guide column 8009. The first guide cylinder 8010 is fixedly connected to the pressure column 8003, and the first guide column 8009 cooperates with the first guide cylinder 8010 to provide a guide for the movement of the pressure column 8003, so that the pressure column 8003 can move smoothly along the center line of the paper body 7001 driven by the first threaded sleeve 8008, thereby ensuring the accuracy and stability of the folding and pressing action.

[0034] Preferably, the pressing assembly 6 includes a compression shell 6001 fixedly connected to the outer wall of one side of the cover plate 4, a partition 6004 is fixedly connected to the interior of the compression shell 6001, and the interior of the compression shell 6001 is divided into a liquid storage area and an adsorption area by the partition 6004, and the outer wall of one side of the compression shell 6001 is provided with first adsorption holes 6003 distributed at equal distances, and the first adsorption holes 6003 are connected to the adsorption area, and the circumferential outer wall of the suction pipe 16 is fixedly connected to the hose 15, and the other end of the hose 15 is fixedly connected to the fixed pipe 22, and one end of the fixed pipe 22 is fixedly connected There is a transverse tube 14, and a first connecting tube 23 is fixedly connected to the circumferential outer wall of the transverse tube 14. The first connecting tube 23 extends to the inside of the adsorption area away from the end of the transverse tube 14. The suction force generated by the fan 17 is transmitted to the adsorption area of ​​the compression shell 6001 through the suction pipe 16, the hose 15, the fixed pipe 22, the transverse tube 14 and the first connecting tube 23, so that the first adsorption hole 6003 generates negative pressure, and applies suction to the reaction area 7002 of the test paper 7, which helps to fix the test paper, and cooperates with the negative pressure at the sealing cover 10 below the placement slot 26 to stabilize the position of the test paper in all directions.

[0035] Preferably, a water tank 11 is fixedly connected to an outer wall of one side of the cover plate 4, a heating pipe 12 and a temperature sensor 13 are respectively provided on the top outer wall of the water tank 11, a transverse pipe 14 is fixedly connected to the bottom outer wall of the water tank 11, a sealing bag 6002 is fixedly connected to the interior of the compression shell 6001, the sealing bag 6002 is located inside the liquid storage area, a liquid guide hole 21 is provided on one side of the water tank 11, the cover plate 4 and the compression shell 6001, the water tank 11 is connected to the liquid storage area inside the compression shell 6001 through the liquid guide hole 21, the heating pipe 12 heats the water in the water tank 11, the temperature sensor 13 monitors the water temperature in real time, and when the cover plate 4 is closed, The water tank 11, the cover plate 4 and the liquid guide hole 21 on one side of the compression shell 6001 are connected. The hot water in the water tank 11 preheated to about 37° flows into the liquid storage area in the compression shell 6001, and the sealing bag 6002 is stretched open. The sealing bag 6002 is tightly pressed above the reaction area 7002 of the paper body 7001 under the action of gravity of the hot water. On the one hand, the gravity makes the reaction area 7002 and the inspection area 7003 fit more closely, which is conducive to the full reaction of the substances. On the other hand, the temperature of the hot water accelerates the reaction process, and this water bath heating method can make the heating area larger and more uniform, without heating dead corners, and significantly improve the accuracy of the test results.

[0036] Preferably, the liquid level of the hot water in the water tank 11 is flush with the liquid level of the hot water in the liquid storage area, and the liquid level is located at the central axis of the liquid guide hole 21, ensuring that the hot water can flow smoothly and equally from the water tank 11 into the liquid storage area of ​​the pressure shell 6001 when the cover plate 4 is closed, thereby stably realizing the heating and pressurizing operations on the reaction area 7002.

[0037] Preferably, the clamping assembly 9 includes a driving wheel 9010 fixedly connected to the circumferential outer wall of another rotating shaft 20, the circumferential outer wall of the driving wheel 9010 is transmission-connected with a transmission belt 9003, the driving wheel 9010 is transmission-connected with a transmission wheel 9002 through the transmission belt 9003, the circumferential inner wall of the transmission wheel 9002 is fixedly connected with a second threaded screw 9006, the circumferential outer wall of the second threaded screw 9006 is provided with double thread grooves distributed at equal distances, the circumferential outer wall of the second threaded screw 9006 is threadedly connected with a second threaded sleeve 9009, the top outer wall of the second threaded sleeve 9009 is fixedly connected with a slide plate 9004, the top of the slide plate 9004 is fixedly connected with a clamping plate 9001, and during the closing process of the cover plate 4, the other rotating shaft 20 drives the driving wheel 9010 to rotate, and the driving wheel 9010 is rotationally connected to the driving wheel 9010. The wheel 9010 is connected to the transmission wheel 9002 through the transmission belt 9003, thereby driving the transmission wheel 9002 to rotate, and the second threaded screw 9006 fixed to the transmission wheel 9002 performs circular motion accordingly. Since the outer wall of the second threaded screw 9006 is provided with double thread grooves distributed at equal distances, the second threaded sleeves 9009 threadedly connected to its outer wall move towards each other in pairs. The second threaded sleeves 9009 drive the top slide 9004 to slide in the slide groove 9005 at the bottom of the placement groove 26. At the same time, the clamping plate 9001 on the top of the slide 9004 aligns the paper body 7001 in the center. This design corrects the skew deviation that may occur when the test paper 7 is manually placed, thereby avoiding the reaction area 7002 and the inspection area 7003 from being unable to fully react in the subsequent reaction process.

[0038] Preferably, a slide groove 9005 is provided on the bottom inner wall of the placement groove 26, and one end of the slide plate 9004 passes through the inside of the slide groove 9005, and one end of the slide plate 9004 slides in the slide groove 9005 to provide guidance for its movement, ensuring that the clamping plate 9001 can accurately move in a straight line to center the paper body 7001.

[0039] Preferably, the inner walls on both sides of the shell 1 are fixedly connected with the second guide rod 9007, the circumferential outer wall of the second guide rod 9007 is slidably connected with the second guide cylinder 9008, the second guide cylinder 9008 is fixedly connected to the clamping plate 9001 through the slide plate 9004, the second guide rod 9007 cooperates with the second guide cylinder 9008 to provide a more stable guide for the movement of the slide plate 9004 and the clamping plate 9001 to prevent them from shifting during the movement, thereby ensuring that the clamping and correction operations of the paper body 7001 are accurate.

[0040] Preferably, a buckle 5 is fixedly connected to the outer wall of one side of the cover plate 4, a slot 3 is provided on the top outer wall of the shell 1, the buckle 5 and the slot 3 are mutually engaged, an elastic pad 19 is provided on the inner wall of one side of the slot 3 for improving the locking effect of the buckle 5, a switch 28 is fixedly connected to the inner wall of one side of the slot 3, a control panel 2 is fixedly connected to the outer wall of one side of the shell 1, the switch 28 is electrically connected to the control panel 2 and the fan 17, and the elastic pad 19 on the inner wall of one side of the slot 3 improves the locking effect of the buckle 5 to prevent the cover plate 4 from loosening and getting stuck at the same time. The switch 28 on the inner wall of one side of the slot 3 is squeezed open by the buckle 5, and forms an electrical connection with the control panel 2 and the fan 17. When the switch 28 is turned on, the motor in the fan 17 reverses, and the first adsorption hole 6003 and the second adsorption hole 25 generate a positive pressure blowing force. The positive pressure blowing force further presses the reaction area 7002 and the inspection area 7003 tightly during the reaction process, and promotes the full reaction. After the reaction is completed and the cover plate 4 is opened, the positive pressure blowing force can blow the test paper 7 away from the placement slot 26 and the pressure shell 6001, making it convenient for the staff to take the material.

[0041] In summary, with the aid of the above technical solution of the present invention, when in use, the staff first opens the test paper 7 and places one end of the test paper 7 against the inner wall of one side of the placement groove 26 to ensure the alignment of the end points of the test paper 7. At the same time, the fan 17 is started. Through the joint action of the fan 17 and a series of pipes, a certain intensity of negative pressure suction can be generated in the adsorption area in the pressure shell 6001 and the sealing cover 10. At this time, the negative pressure suction acts on the reaction area 7002 and the inspection area 7003 of the paper body 7001 through the first adsorption hole 6003 and the second adsorption hole 25, respectively, to achieve the initial fixation of the paper body 7001, and to avoid the test paper 7 from being skewed and loose when placed, which affects the subsequent test results. Subsequently, the staff extracts different types of root and tuber agricultural products (such as potatoes, sweet potatoes, etc.) to obtain the test solution, and drips the obtained solution into the reaction area 7002 in the test paper 7 and lets it stand for 10 minutes. After 10 minutes, the staff closes the cover 4. When the cover plate 4 is closed, the rotating shafts 20 on both sides thereof will be driven to rotate simultaneously. When one set of the rotating shafts 20 rotates, the first bevel gear 8004 can be driven to rotate together. The first bevel gear 8004 meshes with the second bevel gear 8005, thereby driving the first threaded screw 8006 to rotate. When the first threaded screw 8006 rotates, the first threaded sleeve 8008 threadedly connected to its outer wall can drive the pressure column 8003 to move obliquely downward, thereby folding and pressing the paper body 7001 along the center line thereof, thereby ensuring that the reaction area 7002 in the test paper 7 can accurately contact and react with the inspection area 7003, thereby improving the accuracy of the test result. At the same time, when people open the cover plate 4 after the test, the pressure column 8003 will be reset to the initial position. At this time, the pressure column 8003 is at a certain distance from the cover plate 4, thereby facilitating people to take the test paper 7 and the next round of discharging work, and avoiding the situation where the pressure column 8003 blocks people from taking and discharging materials. When the cover plate 4 is closed, the other rotating shaft 20 can drive the driving wheel 9010 to rotate, and the driving wheel 9010 can drive the transmission wheel 9002 to rotate together through the transmission of the transmission belt 9003. When the transmission wheel 9002 rotates, it can drive the second threaded screw 9006 to make a circular motion, and the outer wall of the second threaded screw 9006 is provided with double thread grooves distributed at equal distances, so that the second threaded sleeves 9009 threadedly connected to the outer wall thereof can move towards each other in pairs, and the second threaded sleeves 9009 can drive the clamping plate 9001 to align the paper body 7001 in the center through the opposite movement, so as to realize the mechanical correction of the manually placed test paper 7, and avoid the situation that the reaction area 7002 cannot fully reflect the inspection area 7003 in the subsequent reaction process due to the skewness of the test paper 7; When the cover plate 4 is closed, the hot water (about 37°) inside the water tank 11 will be completely discharged from the liquid guide hole 21 to the liquid storage area in the compression shell 6001. At this time, with the influx of a large amount of hot water in the liquid storage area, the sealing bag 6002 inside the compression shell 6001 can be opened, so that it is tightly pressed on the top of the reaction area 7002 of the paper body 7001 by the gravity of the hot water, that is, the heating in the reaction process is realized to improve the detection efficiency of the entire reaction, and the reaction area 7002 and the inspection area 7003 can be fully pressed and reacted by the gravity of the hot water. At the same time, the heating process is heated by a water bath, so that the heating area is larger and more uniform, and there will be no heating dead angle, thereby improving the accuracy of the detection result; When the cover 4 is closed, the buckle 5 on one side of the cover 4 will be snapped into the slot 3, and the elastic pad 19 in the slot 3 can prevent the cover 4 from loosening. At the same time, the cover 4 will squeeze the switch 28 in the slot 3 to open it. When the switch 28 is turned on, the motor in the fan 17 will rotate in the opposite direction. At this time, positive pressure blowing force will be generated in the first adsorption hole 6003 and the second adsorption hole 25. At this time, the positive pressure blowing force will act on the reaction area 7002 and the inspection area 7003 of the test paper 7 at the same time, so that the test paper The reaction area 7002 and the inspection area 7003 in 7 are pressed more tightly, which is beneficial to the reaction work of the entire test paper 7, and after the reaction is completed and the cover plate 4 is opened, the test paper 7 can be blown away from the placement slot 26 and the pressure shell 6001 by the positive pressure blowing force, which is convenient for the staff to take the material. The entire detection process of pesticide residues in agricultural products in this device can realize the simultaneous detection of multiple samples, and there is no need for traditional staff to manually pinch the reaction, which improves the detection efficiency of the samples and meets people's usage needs.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid detection device for pesticide residues in root and tuber agricultural products, comprising a housing, characterized in that: The test paper is placed on the top outer wall of the shell, and the top of the shell is rotatably connected to a cover plate for pressing the test paper, and a positioning component is provided on one side of the cover plate to prevent displacement of the test paper during the pressing process; The top of the housing is provided with an adsorption component for facilitating the rapid placement and fixation of the test paper; A clamping assembly for fixing the test paper is provided above the housing; The adsorption component includes a placement groove opened on the top outer wall of the shell, the inspection area in the test paper is located inside the placement groove, one end of the paper body is pressed against the inner wall of one side of the placement groove, a fan is fixedly connected to the outer wall of one side of the shell, and the upper and lower sides of the fan are respectively fixedly connected to the suction pipe and the exhaust pipe, one end of the suction pipe is fixedly connected to the second connecting pipe, and the top inner wall of the shell is fixedly connected to the sealing cover distributed at an equal distance, the sealing cover is located directly below the placement groove, and the bottom inner wall of the placement groove is opened with a second adsorption hole, the second adsorption hole is connected to the sealing cover, and one sealing cover is connected to the other sealing cover through a third connecting pipe; A pressing component for accelerating the reaction efficiency between the reaction area and the inspection area in the test paper is arranged on one side of the cover plate.

2. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 1, characterized in that: The positioning assembly includes an extension shell fixedly connected to the top of the shell, both sides of the cover plate are fixedly connected to a rotating shaft, one end of the rotating shaft is rotatably connected to the inner wall of the extension shell, the circumferential outer wall of the rotating shaft is fixedly connected to a first bevel gear, the circumferential outer wall of the first bevel gear is meshed with a second bevel gear, the circumferential inner wall of the second bevel gear is fixedly connected to a first threaded screw, the circumferential outer wall of the first threaded screw is threadedly connected to a first threaded sleeve, a pressure column is fixedly connected to an outer wall of one side of the first threaded sleeve, a through groove is provided on one side of the extension shell, the pressure column passes through the inside of the through groove, the inner wall of the extension shell is fixedly connected to a fixing plate, and the first threaded screw is rotatably connected to the fixing plate.

3. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 2, characterized in that: A first guide column is fixedly connected to an outer wall of one side of the other fixed plate, a first guide cylinder is slidably connected to a circumferential outer wall of the first guide column, and the first guide cylinder is fixedly connected to the pressure column.

4. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 3, characterized in that: The clamping assembly includes a compression shell fixedly connected to the outer wall of one side of the cover plate, a partition is fixedly connected to the interior of the compression shell, the interior of the compression shell is divided into a liquid storage area and an adsorption area by the partition, and the outer wall of one side of the compression shell is provided with first adsorption holes distributed at equal distances, the first adsorption holes are connected to the adsorption area, a hose is fixedly connected to the circumferential outer wall of the suction pipe, the other end of the hose is fixedly connected to a fixed pipe, one end of the fixed pipe is fixedly connected to a transverse pipe, the circumferential outer wall of the transverse pipe is fixedly connected to a first connecting pipe, and the first connecting pipe extends to the interior of the adsorption area away from one end of the transverse pipe.

5. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 4, characterized in that: A water tank is fixedly connected to an outer wall of one side of the cover plate, a heating pipe and a temperature sensor are respectively provided on the top outer wall of the water tank, the cross pipe is fixedly connected to the bottom outer wall of the water tank, a sealing bag is fixedly connected to the interior of the compression shell, the sealing bag is located inside the liquid storage area, the water tank, the cover plate and one side of the compression shell are all provided with liquid guide holes, and the water tank is connected to the liquid storage area inside the compression shell through the liquid guide holes.

6. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 5, characterized in that: The liquid level of the hot water in the water tank is flush with the liquid level of the hot water in the liquid storage area, and the liquid level is located at the central axis of the liquid guide hole.

7. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 6, characterized in that: The clamping assembly includes a driving wheel fixedly connected to the circumferential outer wall of another rotating shaft, the circumferential outer wall of the driving wheel is transmission-connected with a transmission belt, the driving wheel is transmission-connected with a transmission wheel through the transmission belt, the circumferential inner wall of the transmission wheel is fixedly connected with a second threaded screw, the circumferential outer wall of the second threaded screw is provided with double thread grooves distributed at equal distances, the circumferential outer wall of the second threaded screw is threadedly connected with a second threaded sleeve, the top outer wall of the second threaded sleeve is fixedly connected with a slide, and the top of the slide is fixedly connected with a clamping plate.

8. The rapid detection device for pesticide residues in root and tuber agricultural products according to claim 7, characterized in that: A sliding groove is provided on the inner wall of the bottom of the placement groove, and one end of the sliding plate passes through the inside of the sliding groove.

9. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 8, characterized in that: The inner walls on both sides of the shell are fixedly connected with second guide rods, the circumferential outer walls of the second guide rods are slidably connected with second guide cylinders, and the second guide cylinders are fixedly connected to the clamping plate through the slide plate.

10. A rapid detection device for pesticide residues in root and tuber agricultural products according to claim 9, characterized in that: A buckle is fixedly connected to an outer wall on one side of the cover plate, a slot is provided on the top outer wall of the shell, the buckle and the slot are clipped together, an elastic pad for improving the locking effect of the buckle is provided on an inner wall on one side of the slot, a switch is fixedly connected to an inner wall on one side of the slot, a control panel is fixedly connected to an outer wall on one side of the shell, and the switch is electrically connected to the control panel and the fan.

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