Portable fruit and vegetable safety detection equipment

Abstract

The invention discloses portable fruit and vegetable safety detection equipment which comprises a detection base, a plurality of detection insertion pipes with openings in the upper ends are arranged at the upper end of the detection base, enzyme biosensors are arranged at the bottoms in the detection insertion pipes, filter layers are arranged at the positions, corresponding to the enzyme biosensors, of the detection insertion pipes, and top shafts are upwards arranged on the filter layers; a plurality of liquid leakage holes are formed in the periphery, corresponding to the top shaft, of the filtering layer; the elution pipes are in one-to-one correspondence with the detection insertion pipes, one end of each elution pipe is open, the free end of each elution pipe is in threaded connection with a sealing cover, a liquid outlet hole is formed in the middle of the sealing cover in a penetrating mode, a limiting cover covering the corresponding liquid outlet hole is arranged in the sealing cover, and a plurality of through holes are formed in the side wall of the limiting cover; sealing blocking pieces used for blocking the liquid outlet holes are connected into the limiting covers in a sliding mode, and supporting springs are arranged between the sealing blocking pieces and the bottoms of the corresponding limiting covers. According to the invention, pesticide residue detection can be simultaneously carried out on a plurality of samples, the batch detection time is effectively shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide residue detection, and in particular to a portable fruit and vegetable safety detection device. Background Art

[0002] With the widespread use of pesticides in modern agricultural production, the problem of pesticide residues on the surface of fruits and vegetables has aroused widespread public concern about food safety. In order to ensure the health of consumers, governments and international organizations have formulated a series of strict maximum pesticide residue limit standards. These standards require that pesticide residues on the surface of fruits and vegetables must be accurately tested before they enter the market. However, although traditional laboratory analysis methods such as gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) can provide high-precision test results, their operation is complex, time-consuming, and requires professional technicians and expensive equipment support, which cannot meet the ability to quickly respond to market demand.

[0003] In order to solve the above problems, Point-of-Care Testing (POCT) has been introduced as an emerging solution to the field of pesticide residue detection in fruits and vegetables. POCT technology aims to achieve fast and simple operation without sacrificing accuracy through portable equipment, so that non-professionals can also conduct preliminary screening of pesticide residues directly at fruit and vegetable picking sites, farmers' markets, and even home environments. This not only greatly shortens the time from sampling to obtaining results, but also helps to promptly discover and deal with the problem of excessive pesticide residues, ensuring the safety of consumers on the table.

[0004] Despite this, most of the equipment currently available on the market for on-site detection of pesticide residues still has a significant limitation: they can only test a single sample one by one, and each test process usually takes 5 to 15 minutes. This means that if a comprehensive evaluation of multiple fruits and vegetables is required, the entire testing process will be very long, which seriously restricts work efficiency, especially in scenarios where there is a large demand for batch testing. This shortcoming is particularly prominent. Summary of the invention

[0005] The purpose of the present invention is to provide a portable fruit and vegetable safety detection device, which can simultaneously perform pesticide residue detection on multiple samples, effectively shorten the batch detection time, and improve work efficiency.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a portable fruit and vegetable safety detection device, comprising a detection base, wherein a plurality of detection cannulas with upper ends opened are arranged at the upper end of the detection base, an enzyme biosensor is arranged at the bottom of each detection cannula, each detection cannula is provided with a filter layer above the corresponding enzyme biosensor, each filter layer is provided with a top shaft upward, and each filter layer is provided with a plurality of leakage holes on the outer periphery of the corresponding top shaft;

[0007] It also includes a plurality of elution tubes corresponding to the detection cannula one by one and open at one end, the free end of each elution tube is threadedly connected to a sealing cover, each sealing cover can be detachably connected to the detection cannula, a liquid outlet hole is provided through the middle of each sealing cover, the inner diameter of the liquid outlet hole is larger than the outer diameter of the top shaft, each sealing cover is provided with a limit cover covering the corresponding liquid outlet hole, the side wall of each limit cover is provided with a plurality of through holes, each limit cover is slidably connected with a sealing plug for plugging the liquid outlet hole, the outer diameter of each sealing plug is equal to the inner diameter of the corresponding limit cover, and a supporting spring is provided between each sealing plug and the bottom of the corresponding limit cover;

[0008] A plurality of light display bars corresponding to the inspection cannulas are arranged outside the detection base, each of the light display bars is provided with a green light emitting diode and a red light emitting diode. A battery and an integrated circuit board are arranged inside the detection base, and each enzyme biosensor, each green light emitting diode and each red light emitting diode are electrically connected to the integrated circuit board.

[0009] By adopting the above technical solution, when testing for pesticide residues in fruits and vegetables, the fruits and vegetables to be tested are cut into small pieces, and then loaded into elution tubes according to categories. After adding eluent into the elution tubes, the sealing cap is covered, and the elution tubes are shaken so that the eluent can better elute the pesticides remaining on the surface of the fruits and vegetables.

[0010] Then, the elution tube is inverted to insert the sealing cover into the detection insert tube. During the connection process, the top shaft pushes the sealing plug upward to compress the supporting spring, so that the liquid outlet is opened, and the eluent flows out from the liquid outlet, and then flows into the enzyme biosensor through the leakage hole for detection. Through the detection of the enzyme biosensor, if the pesticide residue exceeds the standard, the red light emitting diode emits a red light to remind, and if the pesticide residue is qualified, the green light emitting diode emits a green light to remind.

[0011] The present invention is further configured as follows: each detection cannula includes a connecting section located at the bottom and a display section located at the top, each sealing cover is detachably connected to the corresponding connecting section, an annular light strip is provided on the inner wall of each display section, and each annular light strip is provided with a red LED light and a green LED light that are both electrically connected to the integrated circuit board.

[0012] The present invention is further configured as follows: each connection section is provided with a connection internal thread on the inner wall above the corresponding filter layer, and each sealing cover is provided with a connection external thread on the outer wall which is threadably connected to the corresponding connection internal thread.

[0013] The present invention is further configured as follows: each elution tube is made of transparent material.

[0014] The present invention is further configured as follows: a capacity scale is provided on the outside of each elution tube.

[0015] The present invention is further configured such that the inner diameter of each display segment is larger than the inner diameter of the corresponding connection segment.

[0016] The present invention is further configured as follows: the edge of each liquid outlet facing the corresponding sealing plugging piece is chamfered to form a sealing chamfer, and the edge of each sealing plugging piece facing the corresponding liquid outlet is cut to form a locking chamfer matching the sealing chamfer.

[0017] In summary, the present invention has the following beneficial effects:

[0018] First, compared with the traditional pesticide residue detection equipment, the present invention can simultaneously detect multiple different fruits and vegetables. Each type of fruit and vegetable is placed in a different elution tube for elution, and then the elution tube is directly inserted upside down into the detection insert, so that the enzyme biosensor can be used for automatic detection. Compared with the method of queuing up for detection one by one, it can effectively shorten the time of batch detection and improve work efficiency;

[0019] Secondly, after the detection is completed, the present invention can illuminate the transparent elution tube through a red LED light or a green LED light, so that the internal eluent reflects the light tube to present different colors, which is convenient for quickly distinguishing the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial cross-sectional view used to show the internal structure of the detection base;

[0022] Figure 3 It is a partial cross-sectional view used to show the internal structure of the detection cannula;

[0023] Figure 4 Used to demonstrate the connection between the detection cannula and the sealing cover;

[0024] Figure 5 A partial cross-sectional view showing the liquid outlet hole in the sealing cover.

[0025] In the figure: 1. detection base; 2. detection cannula; 21. connection section; 22. display section; 23. filter layer; 24. top shaft; 25. leakage hole; 26. connecting internal thread; 3. enzyme biosensor; 4. ring light strip; 41. red LED light; 42. green LED light; 5. elution tube; 6. sealing cover; 61. connecting external thread; 62. liquid outlet; 63. limit cover; 64. through hole; 65. sealing plug; 66. sealing cut corner; 67. locking cut corner; 68. support spring; 7. light display bar; 71. green light emitting diode; 72. red light emitting diode; 8. battery; 9. integrated circuit board. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example, see Figure 1-5A portable fruit and vegetable safety detection device comprises a detection base 1, and six detection cannulas 2 with upper ends opened are arranged at the upper end of the detection base 1, each detection cannulas 2 comprises a connecting section 21 located at the lower part and a display section 22 located at the upper part, and the inner diameter of each display section 22 is larger than the inner diameter of the corresponding connecting section 21, and an enzyme biosensor 3 is arranged at the bottom of each connecting section 21, and each connecting section 21 is provided with a filter layer 23 above the corresponding enzyme biosensor 3, and each filter layer 23 is provided with a top shaft 24 upward, and each filter layer 23 is provided with a plurality of leakage holes 25 on the outer periphery of the corresponding top shaft 24, so that the eluent flows into the enzyme biosensor 3 through the leakage holes 25 for detection. An annular light strip 4 is arranged on the inner wall of each display section 22, and each annular light strip 4 is provided with four red LED lights 41 and four green LED lights 42.

[0031] It also includes six elution tubes 5 corresponding to the detection cannulas 2 one by one and open at one end. Each elution tube 5 is made of transparent material and has a capacity scale on its outer side. The free end of each elution tube 5 is threadedly connected to a sealing cover 6. The inner wall of each connecting section 21 above the corresponding filter layer 23 is provided with a connecting internal thread 26. The outer wall of each sealing cover 6 is provided with a connecting external thread 61 threadedly connected to the corresponding connecting internal thread 26. After the sample is loaded into the elution tube 5 and covered with the sealing cover 6 for elution, it is inserted upside down into the detection cannulas 2.

[0032] A liquid outlet hole 62 is provided through the middle of each sealing cover 6. The inner diameter of the liquid outlet hole 62 is larger than the outer diameter of the top shaft 24, so that the top shaft 24 will not block the eluent from flowing out of the liquid outlet hole 62. A limiting cover 63 is provided in each sealing cover 6 to cover the corresponding liquid outlet hole 62. A plurality of through holes 64 are provided on the side wall of each limiting cover 63. A sealing plug 65 for plugging the liquid outlet hole 62 is slidably connected in each limiting cover 63. Each liquid outlet hole 62 faces the corresponding sealing cover 63. The edge of one side of the plugging piece 65 is chamfered to form a sealing cut angle 66. The edge of each sealing plugging piece 65 facing the corresponding liquid outlet 62 is cut to form a locking cut angle 67 that matches the sealing cut angle 66. The outer diameter of each sealing plugging piece 65 is equal to the inner diameter of the corresponding limit cover 63. A support spring 68 is provided between each sealing plugging piece 65 and the bottom of the corresponding limit cover 63. The support spring 68 provides a supporting force to enable the sealing plugging piece 65 to block the liquid outlet 62.

[0033] Six light display strips 7 corresponding to the inspection cannulas are vertically arranged outside the detection base 1, and each light display strip 7 is provided with a green light emitting diode 71 and a red light emitting diode 72. A battery 8 and an integrated circuit board 9 are arranged inside the detection base 1, and each enzyme biosensor 3, each red LED lamp 41, each green LED lamp 42, each green light emitting diode 71 and each red light emitting diode 72 are electrically connected to the integrated circuit board 9.

[0034] Usage: When testing for pesticide residues in fruits and vegetables, cut the fruits and vegetables to be tested into small pieces, and then load them into the elution tube 5 according to their categories. After adding the eluent into the elution tube 5, cover the sealing cover 6, and shake the elution tube 5 so that the eluent can better elute the pesticides remaining on the surface of the fruits and vegetables.

[0035] Subsequently, the elution tube 5 is inverted so that the sealing cover 6 is inserted into the detection insert tube 2, and then the rotatable sealing cover 6 is connected to the connecting section 21. During the connection process, the top shaft 24 lifts the sealing plug 65 upward to compress the support spring 68, so that the liquid outlet 62 is opened, and the eluent flows out from the liquid outlet 62, and then flows into the enzyme biosensor 3 through the leakage hole 25 for detection. Through the detection of the enzyme biosensor 3, if the pesticide residue exceeds the standard, the red light emitting diode 72 emits a red light to remind, and the red LED lamp 41 emits light to irradiate the elution tube 5, so that the elution tube 5 emits a light red light. If the pesticide residue is qualified, the green light emitting diode 71 emits a green light to remind, and the green LED lamp 42 emits light to irradiate the elution tube 5, so that the elution tube 5 emits a light green light.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A portable fruit and vegetable safety detection device, comprising a detection base (1), characterized in that: The upper end of the detection base (1) is provided with a plurality of detection cannulas (2) with upper ends opened, the bottom of each detection cannulas (2) is provided with an enzyme biosensor (3), each detection cannulas (2) is provided with a filter layer (23) above the corresponding enzyme biosensor (3), each filter layer (23) is provided with a top shaft (24) upward, and each filter layer (23) is provided with a plurality of liquid leakage holes (25) on the outer periphery of the corresponding top shaft (24); The invention also comprises a plurality of elution tubes (5) corresponding to the detection cannula (2) one by one and having one end open, the free end of each elution tube (5) being threadedly connected to a sealing cover (6), each sealing cover (6) being detachably connected to the detection cannula (2), a liquid outlet hole (62) being provided through the middle of each sealing cover (6), the inner diameter of the liquid outlet hole (62) being larger than the outer diameter of the top shaft (24), and a cover for covering the liquid inside each sealing cover (6). A limiting cover (63) corresponding to the liquid outlet hole (62), a side wall of each limiting cover (63) is provided with a plurality of through holes (64), a sealing plug (65) for plugging the liquid outlet hole (62) is slidably connected inside each limiting cover (63), an outer diameter of each sealing plug (65) is equal to an inner diameter of the corresponding limiting cover (63), and a supporting spring (68) is provided between each sealing plug (65) and the bottom of the corresponding limiting cover (63); The detection base (1) is provided with a plurality of light display bars (7) corresponding to the inspection cannulas one by one, each of the light display bars (7) being provided with a green light emitting diode (71) and a red light emitting diode (72), the detection base (1) being provided with a battery (8) and an integrated circuit board (9), each enzyme biosensor (3), each green light emitting diode (71) and each red light emitting diode (72) being electrically connected to the integrated circuit board (9).

2. A portable fruit and vegetable safety detection device according to claim 1, characterized in that: Each detection cannula (2) comprises a connecting section (21) located at the bottom and a display section (22) located at the top, each sealing cover (6) is detachably connected to the corresponding connecting section (21), an annular light strip (4) is provided on the inner wall of each display section (22), and each annular light strip (4) is provided with a red LED light (41) and a green LED light (42) both of which are electrically connected to the integrated circuit board (9).

3. A portable fruit and vegetable safety detection device according to claim 2, characterized in that: Each connecting section (21) is provided with a connecting internal thread (26) on the inner wall above the corresponding filter layer (23), and each sealing cover (6) is provided with a connecting external thread (61) threadedly connected to the corresponding connecting internal thread (26) on the outer wall.

4. A portable fruit and vegetable safety detection device according to claim 2, characterized in that: Each elution tube (5) is made of transparent material.

5. A portable fruit and vegetable safety detection device according to claim 4, characterized in that: The outer side of each elution tube (5) is provided with a capacity scale.

6. The portable fruit and vegetable safety detection device according to claim 2, characterized in that: The inner diameter of each display segment (22) is greater than the inner diameter of the corresponding connecting segment (21).

7. The portable fruit and vegetable safety detection device according to claim 1, characterized in that: The edge of each liquid outlet (62) facing the corresponding sealing plug (65) is cut to form a sealing cut angle (66), and the edge of each sealing plug (65) facing the corresponding liquid outlet (62) is cut to form a locking cut angle (67) that matches the sealing cut angle (66).

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