A sample preparation device for pesticide residue detection

Abstract

The invention discloses a sample preparation device for pesticide residue detection, which comprises: a loading platform; an upper connecting plate, which is transversely fixed on the loading platform, and a plurality of placement slots are arranged in the upper connecting plate for positioning and placing fruit and vegetable samples; a locking belt, which is arranged at each placement slot, and the locking belt can bind the fruit and vegetable samples in the placement slot; an upper transmission frame, which is suspended above the loading platform; a plurality of sampling and extraction components, which are vertically arranged, and each of the sampling and extraction components is respectively arranged corresponding to the fruit and vegetable samples in the placement slots, and is used for synchronous sampling; a plurality of liquid preparation components, which are arranged in an arranged manner, and each of the liquid preparation components is vertically fixed on the other side of the loading platform; and a test tube rack, which is arranged in the loading platform, and a plurality of liquid storage test tubes are inserted in the test tube rack, and each of the liquid storage test tubes is connected with the liquid preparation component through a conveying pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of sample preparation and detection equipment, in particular to a sample preparation device for pesticide residue detection. Background Art

[0002] The development of agricultural industrialization makes the production of agricultural products increasingly dependent on exogenous substances such as pesticides, antibiotics and hormones. The irrational use of these substances will inevitably lead to excessive exogenous substances such as pesticides in agricultural products, thereby affecting consumer food safety, and in severe cases will cause adverse effects such as mental illness and abnormal development of consumers. Therefore, the monitoring of pesticide residues in agricultural products is strengthened, so as to urge the production to use pesticides reasonably to reduce the potential harm of pesticide residues to the human body. At present, when detecting pesticide residues in agricultural and sideline products such as vegetables and fruits, it is necessary to prepare samples first, that is, crush them, and then perform sample pretreatment, which not only consumes a lot of manpower costs, but also has low work efficiency. In particular, pesticides in some agricultural and sideline products have not yet completely penetrated into agricultural and sideline products, and they are only retained in the outer layer of pulp. Directly preparing samples of agricultural and sideline products as a whole will affect the content measurement results. Therefore, those skilled in the art provide a sample preparation device for pesticide residue detection to solve the problems raised in the above-mentioned background technology. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: a sample preparation device for pesticide residue detection, comprising:

[0004] Stage;

[0005] An upper connecting plate is transversely fixed on the loading platform, and a plurality of placement slots are provided in the upper connecting plate for positioning and placing fruit and vegetable samples;

[0006] A locking belt is arranged at each of the placement slots, and the locking belt can bind the fruit and vegetable samples in the placement slots;

[0007] An upper transmission frame is suspended above the loading platform;

[0008] The sampling and extraction components are multiple and vertically arranged, and each of the sampling and extraction components is respectively arranged corresponding to the fruit and vegetable samples in the placement slots, and is used for synchronous sampling work;

[0009] A plurality of liquid preparation components are arranged in an array, each of which is vertically fixed on the other side of the stage; and

[0010] A test tube rack is arranged in the loading platform, and a plurality of liquid storage test tubes are inserted in the test tube rack, and each of the liquid storage test tubes is connected with the liquid preparation component through a conveying pipe.

[0011] Further, as a preference, the upper transmission frame comprises:

[0012] Fixed frame;

[0013] A transmission screw is rotatably arranged in the fixing frame, and a driving seat is slidably arranged on the transmission screw through the meshing action of threads;

[0014] An outer mounting plate is transversely fixed below the driving seat via a lifting seat, wherein the lifting seat is constructed as a two-stage retractable structure;

[0015] A plurality of central shafts are arranged in an array, each of the central shafts is vertically rotatably arranged in the outer mounting plate, a gear member is sleeved and fixed on each of the central shafts, and the gear members are meshed and transmitted with each other; and

[0016] The driving motor is mounted on the outer mounting plate, and the output end of the driving motor is connected to one of the central shaft rods for transmission.

[0017] Further, as a preference, a guide plate is coaxially fixed to the lower end of the central axis rod, and the sampling and extraction components are all fixed on the guide plate;

[0018] And each of the sampling and extraction components is respectively arranged at a quadrant point of the guide plate.

[0019] Further, preferably, the sampling and extraction component comprises:

[0020] External pipe fittings;

[0021] A plug-in tube is coaxially fixed below the outer tube, the plug-in tube is constructed as a double-layer tube structure, a storage cavity is provided inside the plug-in tube, and a plurality of current collecting parts are arranged on the circumference of the inner wall thereof;

[0022] A side branch pipe is vertically connected to one side of the plug pipe, and one end of the side branch pipe is connected to the storage cavity;

[0023] A negative pressure pump is connected to the other end of the side branch pipe, and when in operation, the negative pressure pump causes the storage cavity in the plug-in pipe to be in a negative pressure state for internal discharge;

[0024] An internal retention tube is relatively slidably disposed in the plug-in tube and is used for taking and delivering the fruit and vegetable cut sample flesh; and

[0025] The upper plug body is coaxially fixed in the outer pipe member, and the upper plug body is sealed and connected with a boost pipe.

[0026] Furthermore, as a preference, a truncation piece is coaxially fixed to the lower end of the internal retention tube, a plurality of miniature telescopic rods are connected between the internal retention tube and the outer tube, and a plurality of guide wheels are arranged on the inner lower circumference of the plug-in tube, each of the guide wheels is rotatably arranged in the plug-in tube, and the outer wall of the truncation piece is constructed into an arc structure.

[0027] Further, preferably, the liquid preparation component comprises:

[0028] Liquid pipe;

[0029] An inner collecting cover is coaxially fixed in the liquid making pipe, and a filter mesh hole is provided on one side of the inner collecting cover;

[0030] A slide bar, transversely fixed in the inner collecting cover;

[0031] A pressure rod frame, one end of which is slidably disposed on the slide rod;

[0032] A support spring, which is laterally connected to one side of the inner collecting cover, and the other end of the support spring is connected to the pressure rod frame;

[0033] A liquid replenishment tank is vertically mounted on one side of the liquid preparation pipe, and one side of the liquid replenishment tank is connected to the liquid preparation pipe; and

[0034] The internal pressurizing device is arranged in the liquid making pipe so as to be relatively vertically slidable.

[0035] Furthermore, preferably, an inner net body is connected to the pressure rod frame.

[0036] Further, preferably, the internal pressurizing device comprises:

[0037] A main frame is arranged in the inner collecting cover by means of a transverse sliding movement of an external pressure cylinder, and a screw is vertically fixed on the main frame;

[0038] An adjustment frame is arranged parallel to one side of the main frame through a telescopic support rod;

[0039] A hinge shaft rod is constructed in a herringbone structure, a plurality of the hinge shaft rods are arranged in a sliding manner on the screw rod, and both ends of the hinge shaft rods are respectively slidably connected to the adjustment frame; and

[0040] The inner pressure piece is respectively fixed vertically on each hinge shaft rod and is in contact with the inner net body.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. In the present invention, a plurality of placement slots are arranged in the upper connecting plate, and a plurality of fruit and vegetable samples of the same type can be positioned and placed in the placement slots. At this time, the transmission frame on the upper end surface drives a plurality of sampling and extraction components to press downward, so that the sampling and extraction components can extract juice and flesh of the fruit and vegetable samples, and then transfer them to the liquid preparation component accordingly, thereby realizing the sample preparation work; in particular, the plurality of sampling and extraction components are respectively vertically distributed at the quadrant points of the guide plate, and through the rotation of the guide plate, the plurality of sampling and extraction components can respectively stagger and sample each fruit and vegetable sample from different points, thereby improving the sampling extensiveness and being able to perform multiple sampling and extraction.

[0043] 2. In the present invention, when the sampling and extraction component is sampling, on the one hand, the internal juice generated by the plug-in tube cutting into the inside of the fruit and vegetable can be extracted, and on the other hand, the internal retention tube in the outer tube can cut off and extract the flesh of the fruit and vegetable, thereby improving the accuracy of the subsequent liquid preparation detection;

[0044] 3. In the present invention, the cut fruit and vegetable flesh can be placed in the inner collecting cover, and the fruit and vegetable flesh can be squeezed and squeezed by the radial pressure of the inner pressurizing device, and the liquid supply and fusion are coordinated with the liquid replenishing tank to realize the liquid making work; in particular, in the liquid making and squeezing, each inner pressure member on the multiple hinge shaft rods can squeeze the fruit and vegetable flesh from different vertical height points, which can better reflect the penetration of pesticide residues in the fruit and vegetable samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 It is a structural schematic diagram of the upper transmission frame in the present invention;

[0047] Figure 3 It is a structural schematic diagram of the guide plate in the present invention;

[0048] Figure 4 It is a schematic diagram of the structure of the sampling and extraction component in the present invention;

[0049] Figure 5 It is a structural schematic diagram of the liquid preparation component in the present invention;

[0050] Figure 6 It is a structural schematic diagram of the internal pressurizing device in the present invention;

[0051] In the figure: 1 stage, 2 upper connecting plate, 21 locking belt, 22 test tube rack, 3 upper transmission frame, 31 fixed frame, 32 driving seat, 33 lifting seat, 34 outer mounting plate, 35 middle axis rod, 36 guide plate, 37 driving motor, 4 liquid preparation component, 41 liquid preparation tube, 42 inner collection cover, 43 sliding rod, 44 pressure rod frame, 45 supporting spring, 46 liquid replenishing tank, 5 sampling and extraction component, 51 outer pipe fitting, 52 plug pipe, 53 side branch pipe, 54 negative pressure pump, 55 upper plug body, 56 boosting pipe, 57 internal retention pipe, 58 guide wheel, 59 cut-off piece, 6 internal pressurizing device, 61 main frame, 62 screw rod, 63 telescopic support rod, 64 hinge shaft rod, 65 internal pressure piece. DETAILED DESCRIPTION

[0052] See also Figure 1 In an embodiment of the present invention, a sample preparation device for pesticide residue detection includes:

[0053] Stage 1;

[0054] An upper connecting plate 2 is transversely fixed on the loading platform 1, and a plurality of placement slots are provided in the upper connecting plate 2 for positioning and placing fruit and vegetable samples;

[0055] A locking belt 21 is arranged at each of the placement slots, and the locking belt 21 can bind the fruit and vegetable samples in the placement slots, wherein the fruit and vegetable types should be fruit and vegetable products containing skin, such as apples, tomatoes, potatoes, pears, etc.;

[0056] An upper transmission frame 3 is suspended above the loading platform 1;

[0057] The sampling and extraction components 5 are multiple and vertically arranged, and each of the sampling and extraction components 5 is respectively arranged corresponding to the fruit and vegetable samples in each of the placement slots, and is used for synchronous sampling work;

[0058] A plurality of liquid preparation components 4 are arranged in an array, and each of the liquid preparation components 4 is vertically fixed on the other side of the stage 1; and

[0059] The test tube rack 22 is arranged in the stage 1 , and a plurality of liquid storage test tubes are inserted in the test tube rack 22 , and each of the liquid storage test tubes is connected to the liquid preparation component 4 through a delivery pipe.

[0060] In this embodiment, the upper transmission frame 3 includes:

[0061] Fixed frame 31;

[0062] The transmission screw is rotatably arranged in the fixing frame 31, and a driving seat 32 is slidably arranged on the transmission screw through the meshing action of the thread, so as to adjust the spatial positioning point of the sampling and extraction component;

[0063] The outer mounting plate 34 is transversely fixed below the driving seat 32 through a lifting seat 33, and the lifting seat 33 is constructed as a two-stage retractable structure; in particular, it can effectively control the penetration depth of the sampling and extraction component, so as to facilitate the later detection of the pesticide penetration depth measurement of fruit and vegetable samples;

[0064] A plurality of central shafts 35 are arranged in an array, each of the central shafts 35 is vertically rotatably arranged in the outer mounting plate 34, a gear member is sleeved and fixed on each of the central shafts 35, and the gear members are meshed and transmitted with each other; and

[0065] The driving motor 37 is mounted on the outer mounting plate 34 , and the output end of the driving motor 37 is connected to one of the central shafts 35 for transmission.

[0066] As a preferred embodiment, a guide plate 36 is coaxially fixed to the lower end of the central axis rod 35, and the sampling and extraction components 5 are all fixed on the guide plate 36;

[0067] And each of the sampling and extraction components 5 is respectively arranged at the quadrant point of the guide plate 36, wherein each sampling and extraction component can be inserted into a plurality of fruit and vegetable samples for sampling from different positions. In particular, the fruit and vegetable samples can be placed and adjusted in different positions, including tilting, horizontal placement, vertical placement, etc., thereby improving the universality of sampling and ensuring the representativeness of subsequent detection.

[0068] In this embodiment, the sampling and extraction component 5 includes:

[0069] Outer pipe 51;

[0070] The plug-in tube 52 is coaxially fixed below the outer tube 51. The plug-in tube 52 is constructed as a double-layer tube structure. A storage cavity is provided inside the plug-in tube 52, and a plurality of current collecting parts are provided on the circumference of the inner wall thereof.

[0071] A side branch pipe 53 is vertically connected to one side of the plug-in pipe 52, and one end of the side branch pipe 53 is in communication with the storage cavity;

[0072] The negative pressure pump 54 is connected to the other end of the side branch pipe 53. When in operation, the negative pressure pump 54 causes the storage cavity in the plug-in tube 52 to be in a negative pressure state for internal discharge; that is, the storage cavity can absorb and store the juice produced by the plug-in tube extending into the fruit and vegetable sample under negative pressure in a timely manner so as to prepare liquid later;

[0073] The internal retention tube 57 is relatively slidably disposed in the plug-in tube 52 and is used for taking and delivering the fruit and vegetable cut sample flesh; and

[0074] The upper plug body 55 is coaxially fixed in the outer tube 51. The upper plug body 55 is sealed with a booster tube 56. When the pulp in the fruit and vegetable sample remains in the internal retention tube, the pulp in the fruit and vegetable sample can slide out of the internal retention tube through the air supply and pressure relief effect of the booster tube.

[0075] In this embodiment, a cut-off piece 59 is coaxially fixed to the lower end of the internal retention tube 57, a plurality of miniature telescopic rods are connected between the internal retention tube and the outer tube, and a plurality of guide wheels 58 are arranged on the inner lower circumference of the plug-in tube 52, each of the guide wheels 58 is rotatably arranged in the plug-in tube 52, and the outer wall of the cut-off piece 59 is configured as an arc structure, and the vertical displacement of the internal retention tube is controlled by the telescopic effect of the miniature telescopic rod. At this time, the internal retention tube can be squeezed inwardly under the contact guidance of the guide wheel, so as to cut off the flesh of fruits and vegetables.

[0076] In this embodiment, the liquid preparation component 4 includes:

[0077] Liquid making pipe 41;

[0078] An inner collecting cover 42 is coaxially fixed in the liquid preparation tube 41, and a filter hole is provided on one side of the inner collecting cover 42, wherein the cut pulp in the fruit and vegetable sample can be placed at the corresponding filter hole;

[0079] A slide bar 43, transversely fixed inside the inner collecting cover 42;

[0080] A pressure rod frame 44, one end of which is slidably disposed on the slide rod 43;

[0081] A support spring 45 is transversely connected to one side of the inner collecting cover 42, and the other end of the support spring 45 is connected to the pressure rod frame 44;

[0082] A liquid replenishing tank 46 is vertically mounted on one side of the liquid making pipe 41, and one side of the liquid replenishing tank 46 is connected to the liquid making pipe 41; and

[0083] The internal pressurizing device 6 is relatively vertically slidably disposed in the liquid making tube 41. The internal pressurizing device can squeeze the cut pulp in the fruit and vegetable sample to make liquid under radial squeezing action.

[0084] As a preferred embodiment, the pressure rod frame 44 is connected to an inner mesh body.

[0085] In this embodiment, the internal pressurizing device 6 includes:

[0086] The main frame 61 is arranged in the inner collecting cover 42 by sliding transversely through an external pressure cylinder (not shown in the figure), and a screw rod 62 is vertically fixed on the main frame 61;

[0087] The adjustment frame is arranged parallel to one side of the main frame body 61 through a telescopic support rod 63;

[0088] The hinge shaft rod 64 is constructed in a herringbone structure, and a plurality of the hinge shaft rods 64 are arranged in a sliding arrangement on the screw rod 62, and both ends thereof are respectively slidably connected to the adjustment frame; wherein the telescopic support rod causes a sliding displacement between the adjustment frame and the main frame under the telescopic action, so that the hinge shaft rod is folded and adjusted accordingly, and

[0089] The inner pressure members 65 are respectively vertically fixed on the hinge shafts 64 and are in contact with the inner mesh body.

[0090] Specifically, during use, multiple fruit and vegetable samples of the same kind are placed in the upper connecting plate respectively, and the upper transmission frame drives each sampling and extraction component to vertically cut into the fruit and vegetable samples. At this time, the storage cavity in the plug-in tube can extract the generated juice under negative pressure, and the plug-in tube can simultaneously cut off the pulp of the fruit and vegetable samples through the cutting piece; then it is transferred to the liquid preparation tube by the upper transmission frame, and the internal pressurizing device can squeeze the fruit and vegetable pulp from different vertical height points under the action of lateral pressure, so as to detect the penetration of pesticide residues in the fruit and vegetable samples in the later stage.

[0091] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sample preparation device for pesticide residue detection, characterized in that: It includes: Stage (1); An upper connecting plate (2) is transversely fixed on the loading platform (1), and a plurality of placement slots are provided in the upper connecting plate (2) for positioning and placing fruit and vegetable samples; A locking belt (21) is arranged at each of the placement slots, and the locking belt (21) can bind the fruit and vegetable samples in the placement slots; An upper transmission frame (3) suspended above the loading platform (1); The sampling and extraction components (5) are multiple and vertically arranged, and each of the sampling and extraction components (5) is respectively arranged corresponding to the fruit and vegetable samples in each of the placement slots, and is used for synchronous sampling work; A plurality of liquid preparation components (4) are arranged in an array, and each of the liquid preparation components (4) is vertically fixed on the other side of the stage (1); as well as A test tube rack (22) is arranged in the loading platform (1), wherein a plurality of liquid storage test tubes are inserted in the test tube rack (22), and each of the liquid storage test tubes is connected to the liquid preparation component (4) via a delivery pipe; The sampling and extraction component (5) comprises: Outer pipe fitting (51); A plug-in tube (52) is coaxially fixed below the outer tube (51), the plug-in tube (52) is constructed as a double-layer tube structure, a storage cavity is provided inside the plug-in tube (52), and a plurality of current collecting parts are provided on the circumference of the inner wall thereof; A side branch pipe (53) vertically connected to one side of the plug-in pipe (52), one end of the side branch pipe (53) being in communication with the storage cavity; A negative pressure pump (54) is connected to the other end of the side branch pipe (53), and when in operation, the negative pressure pump (54) causes the storage cavity in the plug-in pipe (52) to be in a negative pressure state for internal discharge; An internal retention tube (57) is relatively slidably disposed in the insertion tube (52) and is used for taking and delivering fruit and vegetable sample flesh; and An upper plug body (55) is coaxially fixed in the outer tube (51), and a booster pipe (56) is sealingly connected to the upper plug body (55); A truncation piece (59) is coaxially fixed to the lower end of the internal retention tube (57), a plurality of miniature telescopic rods are connected between the internal retention tube (57) and the outer tube (51), and a plurality of guide wheels (58) are arranged on the inner lower circumference of the plug-in tube (52), each of the guide wheels (58) is rotatably arranged in the plug-in tube (52), and the outer wall of the truncation piece (59) is constructed into an arc-shaped structure.

2. A sample preparation device for pesticide residue detection according to claim 1, characterized in that: The upper transmission frame (3) comprises: Fixed frame (31); A transmission screw rod is rotatably disposed in the fixing frame (31), and a driving seat (32) is slidably disposed on the transmission screw rod through thread meshing action; An outer mounting plate (34) is transversely fixed below the driving seat (32) via a lifting seat (33), wherein the lifting seat (33) is constructed as a two-stage telescopic structure; A plurality of central shaft rods (35) are arranged in an array, each of the central shaft rods (35) is vertically rotatably arranged in the outer mounting plate (34), a gear member is sleeved and fixed on each of the central shaft rods (35), and the gear members are meshed with each other for transmission; and A driving motor (37) is mounted on the outer mounting plate (34), and an output end of the driving motor (37) is connected to one of the central shaft rods (35) for transmission.

3. A sample preparation device for pesticide residue detection according to claim 2, characterized in that: A guide plate (36) is coaxially fixed to the lower end of the central shaft (35), and the sampling and extraction components (5) are all fixed on the guide plate (36); Furthermore, each of the sampling and extraction components (5) is respectively arranged at a quadrant point of the guide plate (36).

4. A sample preparation device for pesticide residue detection according to claim 1, characterized in that: The liquid preparation component (4) comprises: Liquid making pipe (41); An inner collecting cover (42) is coaxially fixed in the liquid making pipe (41), and a filter mesh hole is provided on one side of the inner collecting cover (42); A slide bar (43) transversely fixed inside the inner collecting cover (42); A pressure rod frame (44), one end of which is slidably disposed on the slide rod (43); A support spring (45) is transversely connected to one side of the inner collecting cover (42), and the other end of the support spring (45) is connected to the pressure rod frame (44); A liquid replenishment tank (46) is vertically mounted on one side of the liquid preparation pipe (41), and one side of the liquid replenishment tank (46) is connected to the liquid preparation pipe (41); and The internal pressurizing device (6) is arranged in the liquid making pipe (41) so as to be relatively vertically slidable.

5. A sample preparation device for pesticide residue detection according to claim 4, characterized in that: The pressure rod frame (44) is connected with an inner net body.

6. A sample preparation device for pesticide residue detection according to claim 5, characterized in that: The internal pressurizing device (6) comprises: A main frame (61) is arranged in the inner collecting cover (42) by means of a transverse sliding motion of an external pressure cylinder, and a screw rod (62) is vertically fixed on the main frame (61); An adjustment frame is arranged parallel to one side of the main frame body (61) through a telescopic support rod (63); A hinge shaft rod (64) is constructed in a herringbone structure, a plurality of the hinge shaft rods (64) are arranged in a sliding manner on the screw rod (62), and both ends of the hinge shaft rods are respectively slidably connected to the adjustment frame; and The inner pressure member (65) is respectively vertically fixed on each of the hinge shaft rods (64) and is in contact with the inner mesh body.

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