Rapid detection device for pesticide residues in food

Abstract

The invention relates to the technical field of food safety detection equipment, and discloses a rapid detection device for pesticide residues in food, the rapid detection device comprises a multi-channel pesticide residue detector, one side of the top is provided with a detection port, the detection port is internally provided with a mounting part, a monitoring part, a control part, a detection part and a material returning part, the mounting part comprises four electric push rods, and the electric push rods are connected with the control part; the four electric push rods are installed at the four corners of the inner wall of the detection opening respectively, installation plates are installed at the ends of inner rods of the four electric push rods, positioning holes are formed in the installation plates, the monitoring part comprises a support, cooperative operation of the installation part and the control part is adopted, and the light shield can tightly surround a cuvette port during detection; according to the multi-channel detection device, diffusion and interference of external light and internal light are blocked, the problem of mutual interference between channels caused by light transmission of cuvettes in a traditional multi-channel detection device is effectively solved, absorbance data deviation caused by light interference is avoided, the accuracy and reliability of a detection result are improved, and the risk of misjudgment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of food safety detection equipment, and in particular to a rapid detection device for pesticide residues in food. Background Technology

[0002] In the field of food safety testing, pesticide residue testing is extremely important. The emergence of rapid detection devices for pesticide residues in food has greatly improved detection efficiency and provided strong support for ensuring food safety. Among them, multi-channel detection devices are highly favored in practical applications because they can detect multiple samples at the same time. For example, the common 12-channel pesticide detector can process multiple samples at a time, greatly improving the detection throughput and meeting the batch detection needs of places such as farmers' markets and food processing companies.

[0003] This type of multi-channel detection device is mostly based on the principle of enzyme inhibition and absorbance colorimetric detection. Each channel is set with independent monochromatic light, and the Lambert-Beer law is used to determine the pesticide residue by detecting the degree of absorption of the sample to light of a specific wavelength. However, after the detector is covered, since the colorimetric cuvette in each channel has a certain degree of light transmittance, it will interfere with the detection accuracy of other channels.

[0004] The interference of light transmission in the cuvette will cause a series of problems. Ideally, each channel should be detected independently and accurately without affecting each other. However, the actual situation is that when the monochromatic light of a channel passes through the sample and the cuvette, part of the light will leak into the adjacent channel. For example, the light of channel 1 may leak into channel 2, causing the light intensity detected by channel 2 to deviate, and ultimately leading to inaccurate absorbance data. This interference has a more prominent impact when detecting low-concentration pesticide residues, which may cause food that originally meets safety standards to be misjudged as excessive pesticide residues due to detection errors, or vice versa, misjudging excessive food as qualified, seriously affecting the reliability of the test results.

[0005] Currently, some detection devices on the market try to solve this problem by adding physical isolation measures between channels, such as setting up shading plates between channels. However, due to the size limitation of the cuvette and the compact internal space of the device, the shading plate is difficult to install, and it is easy to be displaced due to vibration and collision after long-term use. The shading effect is difficult to be sustained and stable, and it is impossible to fundamentally eliminate interference. Some devices use software algorithms to correct the detection data, but this requires a lot of preliminary experiments to establish a complex correction model, and there are differences in the light transmittance of different batches of cuvettes. The model has poor universality and still cannot completely solve the problem of mutual interference between channels. Therefore, a rapid detection device for pesticide residues in food is proposed to solve the above-mentioned problems. SUMMARY OF THE INVENTION

[0006] (I) Technical issues to be solved: In view of the shortcomings of the prior art, the present invention provides a rapid detection device for pesticide residues in food, which solves the problem that the colorimetric cuvettes in each channel of the pesticide residue detector have a certain light transmittance, which will interfere with the detection accuracy of other channels.

[0007] (II) Technical solution: To achieve the above purpose, the present invention provides the following technical solutions: a rapid detection device for pesticide residues in food, comprising a multi-channel pesticide residue detector, a detection port is provided on one side of the top, and a mounting part, a monitoring part, a control part, a detection part and a material return part are provided in the detection port.

[0008] Preferably, the mounting portion includes four electric push rods, which are respectively mounted at the four corners of the inner wall of the detection port, and mounting plates are mounted at the inner rod ends of the four electric push rods, and positioning holes are opened on the mounting plates.

[0009] Preferably, the monitoring unit includes a bracket, which is fixedly connected to the top of the mounting plate and aligned with the positioning hole, and a monochromatic lamp is installed in the middle of the top of the bracket.

[0010] Preferably, the control unit includes a light shield, which is slidably connected to the inner wall of the positioning hole.

[0011] Preferably, the detection part includes a detection groove, which is arranged on the inner wall of the detection port, and a positioning groove is arranged at the bottom of the inner wall of the detection groove, and a photoelectric sensor is installed at the bottom of the inner wall of the positioning groove, and the photoelectric sensor is aligned with the monochromatic light, and a card frame is fixedly connected to the bottom of the inner wall of the detection groove.

[0012] Preferably, the material-removing portion comprises a material-removing cover, the bottom inner wall of the material-removing cover is fixedly connected to the limiting frame, and the bottom surface of the material-removing cover is provided with a card slot and is plugged into the card frame through the card slot.

[0013] Preferably, two six-way power supply direct boxes are installed in the middle of the top of the mounting plate, and there are twelve positioning holes in total, which are evenly divided and arranged on both sides of the top of the mounting plate.

[0014] Preferably, the monitoring unit further comprises a temperature sensor, which is mounted on one side of the top of the bracket, on which a U-shaped frame is mounted, on which a button switch is mounted, which is electrically connected to the temperature sensor, and on which three corner ends of the bracket are provided with sliding holes.

[0015] Preferably, the control unit further comprises four metal blocks, the four metal blocks are respectively fixedly connected to the four sides of the inner wall of the light shield, the three vertices of the light shield are all fixedly connected to slide bars, the three slide bars are respectively slidably connected to the inner walls of the three slide holes, and the top ends of the three slide bars are fixedly connected to pressure plates.

[0016] Preferably, the material stripping portion further comprises four magnets, the four magnets are respectively fixedly connected to the four top surfaces of the material stripping cover, and the four magnets are aligned with the four metal blocks.

[0017] Preferably, the number of the monitoring parts, control parts, detection parts and material return parts is twelve, the twelve monitoring parts and control parts are respectively installed on twelve positioning holes, the twelve detection parts and material return parts are arranged in an array on the inner wall of the detection port and are equally divided on both sides of the inner wall of the detection port, and the twelve detection parts and material return parts are respectively aligned with the twelve monitoring parts and control parts.

[0018] Preferably, the inner walls of the twelve material-removing covers in the twelve material-removing parts are all plugged with cuvettes, the twelve cuvettes are all made of transparent materials, and the bottoms of the twelve cuvettes are respectively in contact with the limit frames in the material-removing covers.

[0019] Preferably, the multi-channel pesticide residue detector is provided with a cooling unit, and the cooling unit includes a circulation tank, so the circulation tank is opened at the bottom of the inner wall and the back of the inner wall of the detection port, and a circulation water pump and a copper-aluminum fin heat exchanger are installed on the top of the multi-channel pesticide residue detector. A circulation pipe is installed in the circulation tank, and one end of the circulation pipe is connected to the water outlet of the circulation water pump, and the other end of the circulation pipe is connected to a side port of the copper-aluminum fin heat exchanger. A water pump is installed on the other side port of the copper-aluminum fin heat exchanger, and the end of the water pump away from the copper-aluminum fin heat exchanger is connected to the water inlet of the circulation water pump.

[0020] Preferably, the circulating water pump is electrically connected to the twelve temperature sensors in the twelve monitoring units respectively, the six monochromatic lamps in the twelve monitoring units are electrically connected to one of the six-way power supply direct-through boxes, and the other six monochromatic lamps in the twelve monitoring units are electrically connected to another six-way power supply direct-through box.

[0021] Preferably, two numbered plates are symmetrically installed at the bottom of the inner wall of the detection port, one of the numbered plates is sequentially provided with numbers one, two, three, four, five, and six, and the numbers one, two, three, four, five, and six on the numbered plate correspond one to one with the six detection slots on the same side, and the other numbered plate is sequentially provided with numbers seven, eight, nine, ten, eleven, and twelve, and the numbers seven, eight, nine, ten, eleven, and twelve on the other numbered plate correspond one to one with the six detection slots on the same side.

[0022] (III) Beneficial effects: Compared with the prior art, the present invention provides a rapid detection device for pesticide residues in food, which has the following beneficial effects: 1. The rapid detection device for pesticide residues in food adopts the coordinated operation of the installation part and the control part. The light shield can tightly surround the cuvette port during detection to block the diffusion and interference of external light and internal light, effectively solving the problem of mutual interference between channels caused by light transmission of the cuvette in traditional multi-channel detection devices, avoiding the deviation of absorbance data caused by light interference, improving the accuracy and reliability of the test results, and reducing the risk of misjudgment.

[0023] 2. The rapid detection device for pesticide residues in food adopts a reasonable structural design of the detection device. The cuvette is installed in the material return cover, and the insertion and removal operations are simple. After the detection is completed, the electric push rod drives the mounting plate to rise, and the magnet on the material return cover can automatically drive the cuvette out of the detection tank through magnetic absorption of the metal block, so that the cuvette is suspended in the positioning hole, which is convenient for the detection personnel to pull out, and can also prevent the detection liquid from splashing and spilling, thereby improving the convenience and safety of operation.

[0024] 3. The rapid detection device for pesticide residues in food uses a detachable material return cover as the insertion channel for the cuvette. After the test is completed, the photoelectric sensor in the positioning slot can be directly exposed, which is convenient for the test personnel to maintain and inspect the electrical components, ensure the accuracy and cleanliness of the sensor, extend the service life of the equipment, and ensure the long-term stability of the test work.

[0025] 4. The rapid detection device for pesticide residues in food uses a cooling unit and a monitoring unit to cooperate. The temperature sensor monitors the temperature of the working area of ​​the detection port in real time. When the temperature change exceeds the set threshold, the circulating water pump starts, and the coolant circulates between the circulation tank, the copper-aluminum fin heat exchanger and the circulating water pump, absorbing the heat in the detection port in time and dissipating it to the external environment, stabilizing the detection environment temperature, ensuring that the detection process is not affected by temperature fluctuations, and further improving the accuracy of the detection results. Brief Description of the Figures

[0026] Figure 1 This is a schematic diagram of the overall structure of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 2 This is a structural diagram of the cooling part of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 3 This is a structural diagram of the detection part of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 4 An exploded view of the material return section of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 5 A bottom view of the material return portion of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 6This is a structural diagram of the installation part of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 7 A rapid detection device for pesticide residues in food proposed by the present invention Figure 6 Enlarged view of A in ; Figure 8 This is a structural diagram of the monitoring part of a rapid detection device for pesticide residues in food proposed by the present invention; Figure 9 This is a structural diagram of the control unit of a rapid detection device for pesticide residues in food proposed by the present invention.

[0027] In the figure: 1. Multi-channel pesticide residue detector; 2. Detection port; 3. Mounting part; 31. Electric push rod; 32. Mounting plate; 33. Positioning hole; 34. Six-way power supply direct box; 4. Monitoring part; 41. Bracket; 42. Monochromatic lamp; 43. Temperature sensor; 44. U-shaped frame; 45. Push button switch; 46. Slide hole; 5. Control part; 51. Shade; 52. Metal block; 53. Slide bar; 54. Press plate; 6. Detection part; 61. Detection slot; 62. Positioning slot; 63. Photoelectric sensor; 64. Card frame; 7. Material return part; 71. Material return cover; 72. Magnet; 73. Limiting frame; 74. Card slot; 8. Cuvette; 9. Cooling part; 91. Circulation slot; 92. Circulation water pump; 93. Copper-aluminum fin heat exchanger; 94. Circulation pipe; 95. Pumping pipe; 10. Label plate. Specific implementation method

[0028] The following will combine the 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 them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Please refer to Figures 1-9 , the present invention provides a technical solution: a rapid detection device for pesticide residues in food, including a multi-channel pesticide residue detector 1, the model is hm-nc20 pesticide residue rapid tester, a detection port 2 is arranged on one side of the top, and the detection port 2 is provided with a mounting part 3, a monitoring part 4, a control part 5, a detection part 6 and a material return part 7. The mounting part 3 of this case includes four electric push rods 31, and the four electric push rods 31 are respectively installed at the four corners of the inner wall of the detection port 2. The inner rod ends of the four electric push rods 31 are installed with a mounting plate 32, and a positioning hole 33 is opened on the mounting plate 32. Two six-way power supply direct boxes 34 are installed in the middle of the top of the mounting plate 32. There are twelve positioning holes 33 in total, and the twelve positioning holes 33 are equally divided and arranged on both sides of the top of the mounting plate 32.

[0030] In the present invention, the monitoring unit 4 includes a bracket 41, which is fixedly connected to the top of the mounting plate 32 and aligned with the positioning hole 33. A monochromatic lamp 42 is installed in the middle of the top of the bracket 41. The monitoring unit 4 also includes a temperature sensor 43, the model of which is TN3000 / 21G12MSM500D8. The temperature sensor 43 is installed on one side of the top of the bracket 41. A U-shaped frame 44 is installed on the bracket 41, and a button switch 45 is installed on the U-shaped frame 44. The button switch 45 is electrically connected to the temperature sensor 43. Three corner ends of the bracket 41 are provided with sliding holes 46.

[0031] The control unit 5 of this case includes a light shield 51, which is slidably connected to the inner wall of the positioning hole 33. The control unit 5 also includes four metal blocks 52, which are respectively fixedly connected to the four sides of the inner wall of the light shield 51. The three vertices of the light shield 51 are all fixedly connected to sliding rods 53, and the three sliding rods 53 are respectively slidably connected to the inner walls of the three sliding holes 46. The tops of the three sliding rods 53 are fixedly connected to the pressing plates 54.

[0032] In this embodiment, the detection part 6 includes a detection groove 61, which is opened on the inner wall of the detection port 2. A positioning groove 62 is also opened at the bottom of the inner wall of the detection groove 61. A photoelectric sensor 63 is installed at the bottom of the inner wall of the positioning groove 62. The model is BPW34 silicon photodiode. The photoelectric sensor 63 is aligned with the monochromatic lamp 42. A card frame 64 is fixedly connected to the bottom of the inner wall of the detection groove 61.

[0033] The material return part 7 in this case includes a material return cover 71, the inner wall of the bottom side of the material return cover 71 is fixedly connected to the limited position frame 73, the bottom surface of the material return cover 71 is provided with a card slot 74 and is plugged into the card frame 64 through the card slot 74, and the material return part 7 also includes four magnets 72, which are respectively fixedly connected to the four top surfaces of the material return cover 71, and the four magnets 72 are aligned with the four metal blocks 52.

[0034] It is worth noting that in this case, there are twelve monitoring parts 4, control parts 5, detection parts 6 and material return parts 7, respectively. The twelve monitoring parts 4 and control parts 5 are respectively installed on the twelve positioning holes 33. The twelve detection parts 6 and material return parts 7 are arranged in an array on the inner wall of the detection port 2 and are equally arranged on both sides of the inner wall of the detection port 2. The twelve detection parts 6 and material return parts 7 are respectively aligned with the twelve monitoring parts 4 and control parts 5. Two numbered plates 10 are symmetrically installed at the bottom of the inner wall of the detection port 2, and one of the numbered plates 10 is sequentially provided with numbers one, two, three, four, five and six. The numbered plates 10 The numbers one, two, three, four, five, and six on the label plate 10 correspond to the six detection slots 61 on the same side one by one. The numbers seven, eight, nine, ten, eleven, and twelve are arranged in sequence on the other label plate 10. The numbers seven, eight, nine, ten, eleven, and twelve on the other label plate 10 correspond to the six detection slots 61 on the same side one by one. Each number corresponds to each channel, which is convenient for personnel to record and view. The inner walls of the twelve material return covers 71 in the twelve material return parts 7 are all plugged with colorimetric cells 8. The twelve colorimetric cells 8 are all made of transparent materials. The bottoms of the twelve colorimetric cells 8 are respectively in contact with the limit frames 73 in the material return covers 71.

[0035] It is worth noting that the multi-channel pesticide residue detector 1 is provided with a cooling unit 9, and the cooling unit 9 includes a circulation groove 91, so the circulation groove 91 is opened at the bottom of the inner wall and the back of the inner wall of the detection port 2, and a circulation water pump 92 and a copper-aluminum fin heat exchanger 93 are installed on the top of the multi-channel pesticide residue detector 1. A circulation pipe 94 is installed in the circulation groove 91, and one end of the circulation pipe 94 is connected to the water outlet of the circulation water pump 92, and the other end of the circulation pipe 94 is connected to a side port of the copper-aluminum fin heat exchanger 93. The other side port of the copper-aluminum fin heat exchanger 93 is connected to a pumping pipe 95, and one end of the pumping pipe 95 away from the copper-aluminum fin heat exchanger 93 is connected to the water inlet of the circulating water pump 92. The circulating water pump 92 is electrically connected to the twelve temperature sensors 43 in the twelve monitoring parts 4, and the six monochromatic lamps 42 in the twelve monitoring parts 4 are electrically connected to one of the six-way power supply direct box 34. The other six monochromatic lamps 42 in the twelve monitoring parts 4 are electrically connected to another six-way power supply direct box 34.

[0036] Working principle: Make the food sample to be tested into an extract and put it into a transparent cuvette 8. Insert the cuvette 8 into the material return cover 71 of the material return part 7 so that its bottom contacts the limit frame 73. After the sample preparation is completed, the four electric push rods 31 of the mounting part 3 are started. The inner rod of the electric push rod 31 contracts, driving the mounting plate 32 to move downward. Each light shield 51 follows the decline and is inserted into the gap between the corresponding detection slot 61 and the material return part 7, thereby forming an effect of surrounding and shielding the outer side of the port of the cuvette 8. At the same time, after the light shield 51 is against the inner bottom of the detection slot 61, the mounting plate 32 continues to descend, prompting the light shield 51 to approach and contact the top surface of the inner wall of the bracket 41 along the positioning hole 33, forming a completely sealed shielding to block the diffusion and interference of external light and internal light.

[0037] Two six-way power supply boxes 34 provide power support for the monochromatic lamp 42. According to the number of channels actually used, the corresponding monochromatic lamp 42 turns on and emits light of a specific wavelength. The light passes through the sample extract in the cuvette 8. Based on the principle of enzyme inhibition, if the pesticide residue in the sample inhibits the enzyme activity, the color of the solution will change differently, thereby affecting the transmittance. The light emitted by each monochromatic lamp 42 is aligned with the central axis of each cuvette 8 and vertically irradiated on the corresponding photoelectric sensor 63. By detecting the intensity of the transmitted light and converting the optical signal into an electrical signal, according to the Lambert-Beer law, the degree of light absorption is related to the amount of pesticide residue. The amount of pesticide residue can be determined by calculating the absorbance. The electrical signal is transmitted to the data processing unit inside the multi-channel pesticide residue detector 1. After calculation and analysis, the pesticide residue data is displayed on the display screen of the detector, and the inspector can obtain the test results intuitively.

[0038] While the light shield 51 slides, the three slide bars 53 slide synchronously and cause the pressure plate 54 to press the button switch 45 upward, thereby turning on the corresponding temperature sensor 43 to monitor the detection environment temperature in real time. When any temperature change exceeds the set threshold, the temperature sensor 43 transmits a signal to the circulating water pump 92, and the circulating water pump 92 starts, so that the coolant in the circulating pipe 94 circulates between the circulating tank 91, the copper-aluminum fin heat exchanger 93 and the circulating water pump 92. The coolant absorbs the heat in the detection port 2 and dissipates it to the external environment through the copper-aluminum fin heat exchanger 93, so as to achieve the stability of the detection environment temperature and ensure the accuracy of the detection result.

[0039] The gap between the light shield 51 entering the detection slot 61 and the material withdrawal part 7 is that the magnet 72 and the metal block 52 are attracted to each other at a close distance, so that the material withdrawal cover 71 is separated from the card frame 64 and fits on the inner wall of the light shield 51, and is adsorbed on the metal block 52. When the detection is completed, the inner rod of the electric push rod 31 pushes the mounting plate 32 to move upward and open, and the adsorbed material withdrawal cover 71 automatically drives the cuvette 8 to be taken out of the detection slot 61 through the limit frame 73, so that each cuvette 8 is hung in the positioning hole 33 on the mounting plate 32, and the material withdrawal operation is completed. At this time, the detection personnel can pull out the material withdrawal cover 71 and the cuvette 8 from each light shield 51 on the mounting plate 32, which is convenient for material withdrawal and avoids splashing of the detection liquid. At the same time, the detachable material withdrawal cover 71 can intuitively expose the photoelectric sensor 63 in each positioning slot 62, which is convenient for maintenance and inspection, ensuring its accuracy and cleanliness, so as to carry out the next batch of sample detection.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device that includes the elements.

Claims

1. A rapid detection device for pesticide residues in food, characterized in that: include: A multi-channel pesticide residue detector (1), with a detection port (2) provided on one side of the top; The detection port (2) is provided with a mounting portion (3), a monitoring portion (4), a control portion (5), a detection portion (6) and a material return portion (7); The mounting portion (3) comprises four electric push rods (31), the four electric push rods (31) being mounted at four corners of the inner wall of the detection port (2) respectively, the inner rod ends of the four electric push rods (31) being mounted with mounting plates (32), and the mounting plates (32) being provided with positioning holes (33); The monitoring part (4) comprises a bracket (41), the bracket (41) is fixedly connected to the top of the mounting plate (32) and aligned with the positioning hole (33), and a monochromatic lamp (42) is installed in the middle of the top of the bracket (41); The control part (5) comprises a light shield (51), and the light shield (51) is slidably connected to the inner wall of the positioning hole (33); The detection portion (6) comprises a detection groove (61), the detection groove (61) being provided on the inner wall of the detection port (2), a positioning groove (62) being provided at the bottom of the inner wall of the detection groove (61), a photoelectric sensor (63) being installed at the bottom of the inner wall of the positioning groove (62), the photoelectric sensor (63) being aligned with the monochromatic light (42), and a card frame (64) being fixedly connected to the bottom of the inner wall of the detection groove (61); The material return portion (7) comprises a material return cover (71), the bottom inner wall of the material return cover (71) is fixedly connected to a limit frame (73), and a clamping groove (74) is provided on the bottom surface of the material return cover (71) and is plugged into the clamping frame (64) through the clamping groove (74).

2. A rapid detection device for pesticide residues in food according to claim 1, characterized in that: Two six-way power supply through boxes (34) are installed in the middle of the top of the mounting plate (32), and there are twelve positioning holes (33) in total. The twelve positioning holes (33) are evenly divided and arranged on both sides of the top of the mounting plate (32).

3. A rapid detection device for pesticide residues in food according to claim 2, characterized in that: The monitoring unit (4) further comprises a temperature sensor (43), wherein the temperature sensor (43) is mounted on one side of the top of the bracket (41), a U-shaped frame (44) is mounted on the bracket (41), a button switch (45) is mounted on the U-shaped frame (44), and the button switch (45) is electrically connected to the temperature sensor (43), and sliding holes (46) are provided at three corner ends of the bracket (41).

4. A rapid detection device for pesticide residues in food according to claim 3, characterized in that: The control unit (5) further comprises four metal blocks (52), the four metal blocks (52) being respectively fixedly connected to four sides of the inner wall of the light shield (51), the three vertices of the light shield (51) being respectively fixedly connected to sliding rods (53), the three sliding rods (53) being respectively slidably connected to the inner walls of three sliding holes (46), and the top ends of the three sliding rods (53) being fixedly connected to pressure plates (54).

5. A rapid detection device for pesticide residues in food according to claim 4, characterized in that: The material-removing portion (7) further comprises four magnets (72), wherein the four magnets (72) are respectively fixedly connected to four top surfaces of the material-removing cover (71), and the four magnets (72) are aligned with the four metal blocks (52).

6. A rapid detection device for pesticide residues in food according to claim 5, characterized in that: The number of the monitoring parts (4), the control parts (5), the detection parts (6) and the material return parts (7) is twelve respectively. The twelve monitoring parts (4) and the control parts (5) are respectively mounted on the twelve positioning holes (33). The twelve detection parts (6) and the material return parts (7) are arranged in an array on the inner wall of the detection port (2) and are equally arranged on both sides of the inner wall of the detection port (2). The twelve detection parts (6) and the material return parts (7) are respectively aligned with the twelve monitoring parts (4) and the control parts (5).

7. A rapid detection device for pesticide residues in food according to claim 6, characterized in that: The inner walls of the twelve material return covers (71) in the twelve material return parts (7) are all plugged with cuvettes (8), the twelve cuvettes (8) are all made of transparent material, and the bottoms of the twelve cuvettes (8) are respectively arranged in contact with the limit frames (73) in the material return covers (71).

8. A rapid detection device for pesticide residues in food according to claim 7, characterized in that: The multi-channel pesticide residue detector (1) is provided with a cooling part (9), the cooling part (9) comprising a circulation groove (91), so that the circulation groove (91) is opened at the bottom of the inner wall and the back of the inner wall of the detection port (2), the top of the multi-channel pesticide residue detector (1) is installed with a circulation water pump (92) and a copper-aluminum fin heat exchanger (93), a circulation pipe (94) is installed in the circulation groove (91), one end of the circulation pipe (94) is connected to the water outlet of the circulation water pump (92), the other end of the circulation pipe (94) is connected to a side port of the copper-aluminum fin heat exchanger (93), the other side port of the copper-aluminum fin heat exchanger (93) is connected to a pumping pipe (95), and one end of the pumping pipe (95) away from the copper-aluminum fin heat exchanger (93) is connected to the water inlet of the circulation water pump (92).

9. A rapid detection device for pesticide residues in food according to claim 8, characterized in that: The circulating water pump (92) is electrically connected to the twelve temperature sensors (43) in the twelve monitoring units (4), respectively; the six monochromatic lamps (42) in the twelve monitoring units (4) are electrically connected to one of the six-way power supply direct-connection boxes (34); and the other six monochromatic lamps (42) in the twelve monitoring units (4) are electrically connected to another six-way power supply direct-connection box (34).

10. The rapid detection device for pesticide residues in food according to claim 6, characterized in that: Two numbered plates (10) are symmetrically mounted on the bottom of the inner wall of the detection port (2), one of the numbered plates (10) being sequentially provided with numbers one, two, three, four, five, and six, and the numbers one, two, three, four, five, and six on the numbered plate (10) correspond one-to-one to the six detection slots (61) on the same side, and the other numbered plate (10) being sequentially provided with numbers seven, eight, nine, ten, eleven, and twelve, and the numbers seven, eight, nine, ten, eleven, and twelve on the other numbered plate (10) correspond one-to-one to the six detection slots (61) on the same side.

Images