Sampling device and method for detecting pesticide residues in food

Abstract

The invention discloses a sampling device for detecting pesticide residues in food, and relates to the field of detection.The sampling device comprises a frame, a smashing assembly, a power assembly, a driving assembly, a lifting assembly and a liquid dropping assembly.A barrel and the smashing assembly are designed to be of a separable structure, on one hand, the smashing requirement of a sample is met, and on the other hand, the smashing requirement of the sample is met; waste samples after sampling can be conveniently and timely cleaned by means of the lifting assembly and the multiple groups of nozzles, and compared with a traditional integrated pulverizer and a cleaning procedure, the pulverizer is more efficient.

Description

Technical Field

[0001] The present invention relates to the field of detection, and in particular to a sampling device and method for detecting pesticide residues in food. Background Art

[0002] Before vegetable food enters processing, it is typically sampled and tested by staff. The sampling steps typically include crushing, soaking in an eluent, and transferring the eluent into a test tube. This testing process is often done manually, which is inefficient and makes it difficult to perform on-line testing, especially in food processing plants or cafeterias. Therefore, it is necessary to develop an automated and efficient sampling device to address these issues. Summary of the Invention

[0003] The purpose of the present invention is to design a sampling device for detecting pesticide residues in food to solve the above technical problems.

[0004] As conceived above, the technical solution adopted by the present invention is:

[0005] A sampling device for detecting pesticide residues in food, comprising a frame, a crushing component and a dripping component;

[0006] The frame includes two symmetrically arranged cross arms, and the crushing assembly is mounted on the cross arms by means of a slide rail module and can move horizontally along the length direction of the cross arms under the action of a driving assembly;

[0007] The lower end of the crushing assembly is also connected to a power assembly, which can ensure that the crushing assembly drives the crushing blades in the crushing assembly to rotate during the process of moving toward the dripping assembly;

[0008] The rack in the power assembly is installed on the lifting assembly and can move up and down in the vertical direction under the action of the lifting assembly, so that the crushing module in the crushing assembly can be separated from the cylinder;

[0009] The front end of the frame is also provided with a plurality of nozzles for cleaning the crushing components.

[0010] Preferably, the crushing assembly includes a cylinder and a crushing module detachably connected to the lower part of the cylinder;

[0011] The upper and lower ends of the cylinder are both open;

[0012] The crushing module includes a base, a filter plate, a stirring shaft and a crushing blade. The filter plate is connected to the base by means of a support column and is located above the base. The stirring shaft passes through the base and the filter plate and is connected to the two through a bearing. The crushing blade is installed on the upper part of the stirring shaft. The base is also provided with a drain port, and a drain pipe group is installed in the drain port.

[0013] A guide block 1 is also provided on the side of the cylinder, and a guide block 2 opposite to the guide block is provided on the side of the base. A vertical screw is installed on the guide block 2, and the polished rod section on the upper part of the screw passes through the guide block 1 and is slidably connected to the guide block 1.

[0014] Preferably, the power assembly includes a gear and a rack, and the gear is connected to the lower end of the stirring shaft and meshes with the rack.

[0015] Preferably, the lifting assembly includes a crossbar, a side bracket, a main bracket and a servo motor;

[0016] The crossbar is mounted on the two side brackets by means of a slide rail module 2 and can move up and down. Two slide bars 1 and a lead screw 1 are mounted in the main bracket. The lower end of the lead screw 1 is connected to the servo motor 1. The lifting seat is slidably connected to the slide bar 1 and is connected to the lead screw 1 by means of a lead screw nut 1. The side end of the lifting seat is also connected to the crossbar. The side end of the main bracket is provided with a notch for the movement of the lifting seat.

[0017] The rack is mounted on the cross bar and two limit plates are also mounted on the cross bar above the rack, a guide groove for sliding is formed between the two limit plates, a connecting arm is mounted on the lower end of the base, a guide plate is mounted on the lower end of the connecting arm, and the end of the guide plate is slidably connected to the guide groove.

[0018] Preferably, the side brackets and the main bracket are both mounted on the frame.

[0019] Preferably, the filter plate and the outer periphery of the base are provided with a sealing ring that matches the inner wall of the cylinder.

[0020] Preferably, the drip assembly is installed at the rear end of the frame, including a support and a medicine liquid tank. The support is installed on the rear end side of the frame, the medicine liquid tank is installed on the upper end of the support, and a drip tube equipped with a solenoid valve is installed at the lower end of the medicine liquid tank.

[0021] Preferably, a window is further provided at the rear end of the frame, and a tray is installed at the bottom of the window.

[0022] Preferably, the drive assembly includes servo motor 2 and screw 2, wherein servo motor 2 is installed at the front end of the frame and the output end of servo motor 2 is connected to screw 2, screw 2 is installed in the frame and connected to the connecting seat arranged on the side of the cylinder by means of a screw nut.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention can be installed on one side of the food conveyor line and automatically sample online as needed, realizing batch sampling. Compared with traditional manual sampling, it has been significantly improved in terms of efficiency and standardization.

[0025] 2. The present invention designs the cylinder and the crushing module into a detachable structure, which on the one hand meets the crushing requirements of the sample, and on the other hand can also use the lifting assembly and multiple groups of nozzles to conveniently clean up the waste samples after sampling in a timely manner. Compared with the traditional integrated crusher and cleaning process, it is more efficient.

[0026] 3. Based on the above-mentioned crushing component structural design, in order to achieve sampling, the present invention can also use the crushing component and the power component to crush the sample placed in the cylinder during the movement of the cylinder toward the dripping component (that is, during the sample transfer process), so that the eluent can fully contact the sample and finally be discharged into the test tube through the drainage tube group. The above process provides another convenient sampling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 Right side view of the present invention.

[0029] Figure 3 It is an internal schematic diagram of the present invention.

[0030] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0031] Figure 5 for Figure 3 Another perspective of the view.

[0032] Figure 6 A top view of a portion of the crushing assembly.

[0033] Figure 7 for Figure 6 The middle section is a cross-sectional view along the BB direction.

[0034] Figure 8 Schematic diagram of the structure of the filter plate and base.

[0035] In the figure: 1 frame, 2 cross arm, 3 crushing assembly, 30 cylinder, 300 guide block 1, 301 guide block 2, 302 screw, 31 crushing module, 310 base, 311 filter plate, 312 stirring shaft, 313 crushing blade, 314 sealing ring, 4 power assembly, 40 gear, 41 rack, 5 lifting assembly, 50 cross bar, 51 side bracket, 52 main bracket, 53 servo motor 1, 54 slide bar, 55 lead screw 1, 56 lifting seat, 57 gap, 58 connecting arm, 59 guide plate, 510 limit plate, 6 drive assembly, 60 servo motor 2, 61 lead screw 2, 62 connecting seat, 7 drip assembly, 70 liquid tank, 71 drip tube, 72 support, 8 drain pipe assembly, 80 drain pipe, 9 solenoid valve, 10 nozzle, 11 test tube, 12 test tube rack, 13 tray, 14 window. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] like Figures 1 to 8 As shown, a sampling device for detecting pesticide residues in food includes a frame 1, a crushing component 3 and a dripping component 7;

[0038] The frame 1 includes two symmetrically arranged cross arms 2, and the crushing assembly 3 is mounted on the cross arms 2 by means of a slide rail module 1 and can move horizontally along the length direction of the cross arms 2 under the action of a drive assembly 6;

[0039] The lower end of the crushing assembly 3 is also connected to a power assembly 4, which can ensure that the crushing assembly 3 drives the crushing blade 313 in the crushing assembly 3 to rotate during the process of moving toward the drip assembly 7;

[0040] The rack 41 in the power assembly 4 is mounted on the lifting assembly 5 and can move up and down in the vertical direction under the action of the lifting assembly 5, so that the crushing module 31 in the crushing assembly 3 can be separated from the cylinder 30;

[0041] The front end of the frame 1 is also provided with a plurality of nozzles 10 for cleaning the crushing assembly 3 .

[0042] In one embodiment of the present invention, the pulverizing assembly 3 includes a cylinder 30 and a pulverizing module 31 detachably connected to the lower portion of the cylinder 30;

[0043] The upper and lower ends of the cylinder 30 are both open. The upper opening is used to place the sample, and the lower opening is used to install the crushing module 31.

[0044] The crushing module 31 includes a base 310, a filter plate 311, an agitator shaft 312, and crushing blades 313. The filter plate 311 is connected to the base 310 via a support column and is located above the base 310. The agitator shaft 312 passes through the base 310 and the filter plate 311 and is connected to both via a bearing. The connection is sealed, such as with a sealing ring 314 or other sealing component. The crushing blades 313 are mounted on the top of the agitator shaft 312. Multiple groups of crushing blades 313 are arranged along the circumference of the agitator shaft 312. The base 310 is also provided with a drain port, within which a drain pipe group 8 is installed.

[0045] The drainage pipe group 8 includes a drainage pipe 80 and a solenoid valve 9 . The solenoid valve 9 is installed between two sections of the drainage pipe 80 and is used to control the drainage rhythm of the eluent infiltrated in the pulverizing module 31 .

[0046] The cylinder 30 is also provided with a guide block 1 300 on the side, and a guide block 2 301 is provided on the side of the base 310, opposite the guide block. A vertical screw 302 is mounted on the guide block 2 301. The polished section of the screw 302 passes through the guide block 1 300 and is slidably connected to the guide block 1 300. The purpose of providing these guide blocks 1 300, 2 guide blocks 301, and screw 302 is to ensure that the crushing module 31 accurately docks with the inner wall of the cylinder 30 during its vertical movement to prevent deviation.

[0047] In one embodiment of the present invention, in order to ensure smooth operation of the crushing module 31 during the movement of the cylinder 30, a power assembly 4 is provided. The power assembly 4 includes a gear 40 and a rack 41. The gear 40 is connected to the lower end of the stirring shaft 312 and meshes with the rack 41.

[0048] In one embodiment of the present invention, in order to separate the crushing module 31 from the cylinder 30, a lifting assembly 5 is provided. The lifting assembly 5 includes a crossbar 50, a side bracket 51, a main bracket 52, and a servo motor 53. The side bracket 51 and the main bracket 52 are both mounted on the frame 1.

[0049] The crossbar 50 is mounted on two side brackets 51 via a second slide rail module and is capable of vertical movement. Two slide bars 54 and a lead screw 55 are mounted within the main bracket 52. The lower end of the lead screw 55 is connected to a servo motor 53. A lifter 56 is slidably connected to the slide bar 54 and connected to the lead screw 55 via a lead screw nut. The side ends of the lifter 56 are also connected to the crossbar 50. A notch 57 is provided at the side end of the main bracket 52 for movement of the lifter 56. The servo motor 53 drives the power assembly 4 and the crushing module 31 to move vertically up and down.

[0050] The rack 41 is installed on the cross bar 50 and two limit plates 510 are also installed on the cross bar 50 above the rack 41. A guide groove for sliding is formed between the two limit plates 510. A connecting arm 58 is installed at the lower end of the base 310, and a guide plate 59 is installed at the lower end of the connecting arm 58. The end of the guide plate 59 is slidably connected to the guide groove.

[0051] In one embodiment of the present invention, in order to prevent leakage of the eluent before cleaning the pulverizing assembly 3 , a sealing ring 314 is provided on the periphery of the filter plate 311 and the base 310 to cooperate with the inner wall of the cylinder 30 .

[0052] In one embodiment of the present invention, the eluent is pre-stored in a drip assembly 7 and discharged as needed. The drip assembly 7 is mounted at the rear end of the frame 1 and includes a support 72 and a liquid medicine tank 70. The support 72 is mounted on the rear end side of the frame 1, and the liquid medicine tank 70 is mounted on the upper end of the support 72. The lower end of the liquid medicine tank 70 is mounted with a drip tube 71 equipped with a solenoid valve 9. The drip tube 71 is directly opposite the test tubes placed on the tray 13 below.

[0053] In one embodiment of the present invention, the rear end of the frame 1 is further provided with a window 14, and a tray 13 is mounted at the bottom of the window 14. A test tube rack 12 can be placed on the tray 13, and test tubes 11 are placed in the test tube rack 12. When multiple samples are taken, the test tubes 11 can be switched by moving the test tube rack 12.

[0054] In one embodiment of the present invention, in order to enable the crushing assembly 3 to move back and forth in the horizontal direction, the driving assembly 6 is provided, specifically including a servo motor 2 60 and a lead screw 2 61. The servo motor 2 60 is installed at the front end of the frame 1 and the output end of the servo motor 2 60 is connected to the lead screw 2 61. The lead screw 2 61 is installed in the frame 1 and is connected to the connecting seat 62 provided on the side of the cylinder 30 by means of a lead screw nut.

[0055] In one embodiment of the present invention, the first and second slide rail modules both adopt a common slide rail + slider combination.

[0056] The sampling method of the present invention is as follows:

[0057] The robot grabs the sample to be tested from the conveyor line and cuts off a small part of the sample into the cylinder 30, then starts the servo motor 2 60. The servo motor 2 60 drives the crushing assembly 3 as a whole to move toward the drip assembly 7 with the help of the screw 2 61. In this process, with the help of the rack 41 and the gear 40, the crushing blade 313 is driven to rotate and crush the sample. When it reaches the bottom of the drip assembly 7, the solenoid valve 9 in the drip tube 71 opens and drips part of the eluent into the cylinder 30. The eluent after soaking the sample is discharged into the test tube 11 through the drainage pipe group 8, completing the sampling.

[0058] After sampling is completed, the crushing component 3 is reset under the action of servo motor 2 60 and reaches the initial position. At this time, servo motor 1 53 starts and drives the crushing module 31 to move down a distance to complete the separation from the cylinder 30. Then, multiple groups of nozzles 10 are opened to clean the cylinder 30 and the crushing module 31, and the waste liquid and impurities are discharged into the waste box at the bottom of the frame 1. Then the crushing module 31 moves up and resets again to prepare for the next sampling.

[0059] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A sampling device for detecting pesticide residues in food, characterized in that: It comprises a frame (1), a crushing component (3) and a dripping component (7); The frame (1) comprises two symmetrically arranged cross arms (2), the crushing assembly (3) is mounted on the cross arms (2) by means of a slide rail module and can move horizontally along the length direction of the cross arms (2) under the action of a driving assembly (6); The lower end of the crushing assembly (3) is also connected to a power assembly (4), and the power assembly (4) can ensure that the crushing blade (313) in the crushing assembly (3) is driven to rotate during the process of the crushing assembly (3) moving toward the drip assembly (7); The rack (41) in the power assembly (4) is mounted on the lifting assembly (5) and can move up and down in the vertical direction under the action of the lifting assembly (5), so as to enable the crushing module (31) in the crushing assembly (3) to be separated from the cylinder (30); The front end of the frame (1) is also provided with a plurality of nozzles (10) for cleaning the crushing assembly (3).

2. A sampling device for detecting pesticide residues in food according to claim 1, characterized in that: The pulverizing assembly (3) comprises a cylinder (30) and a pulverizing module (31) detachably connected to the lower portion of the cylinder (30); The upper and lower ends of the cylinder (30) are both open; The crushing module (31) comprises a base (310), a filter plate (311), a stirring shaft (312) and a crushing blade (313); the filter plate (311) is connected to the base (310) by means of a support column and is located above the base (310); the stirring shaft (312) passes through the base (310) and the filter plate (311) and is connected to the two via a bearing; the crushing blade (313) is installed on the upper part of the stirring shaft (312); the base (310) is also provided with a drain port, and a drain pipe group (8) is installed in the drain port; A guide block 1 (300) is further provided on the side of the cylinder (30), and a guide block 2 (301) opposite to the guide block is provided on the side of the base (310). A vertical screw rod (302) is installed on the guide block 2 (301), and the upper portion of the light rod section of the screw rod (302) passes through the guide block 1 (300) and is slidably connected to the guide block 1 (300).

3. A sampling device for detecting pesticide residues in food according to claim 2, characterized in that: The power assembly (4) comprises a gear (40) and a rack (41), wherein the gear (40) is connected to the lower end of the stirring shaft (312) and meshes with the rack (41).

4. A sampling device for detecting pesticide residues in food according to claim 3, characterized in that: The lifting assembly (5) includes a crossbar (50), a side bracket (51), a main bracket (52) and a servo motor (53); The crossbar (50) is mounted on two side brackets (51) by means of a slide rail module 2 and can move up and down. Two slide bars (54) and a lead screw (55) are mounted in the main bracket (52). The lower end of the lead screw (55) is connected to a servo motor (53). A lifting seat (56) is slidably connected to the slide bar (54) and is connected to the lead screw (55) by means of a lead screw nut. The side end of the lifting seat (56) is also connected to the crossbar (50). A notch (57) for the movement of the lifting seat (56) is provided at the side end of the main bracket (52). The rack (41) is mounted on the cross bar (50), and two limit plates (510) are also mounted on the cross bar (50) above the rack (41), a guide groove for sliding is formed between the two limit plates (510), a connecting arm (58) is mounted on the lower end of the base (310), a guide plate (59) is mounted on the lower end of the connecting arm (58), and the end of the guide plate (59) is slidably connected to the guide groove.

5. A sampling device for detecting pesticide residues in food according to claim 1, characterized in that: The side bracket (51) and the main bracket (52) are both mounted on the frame (1).

6. A sampling device for detecting pesticide residues in food according to claim 2, characterized in that: The outer periphery of the filter plate (311) and the base (310) is provided with a sealing ring (314) that matches the inner wall of the cylinder (30).

7. A sampling device for detecting pesticide residues in food according to claim 1, characterized in that: The drip assembly (7) is installed at the rear end of the frame (1), and comprises a support (72) and a liquid medicine tank (70). The support (72) is installed on the side of the rear end of the frame (1), the liquid medicine tank (70) is installed on the upper end of the support (72), and a drip tube (71) equipped with a solenoid valve (9) is installed at the lower end of the liquid medicine tank (70).

8. A sampling device for detecting pesticide residues in food according to claim 7, characterized in that: The rear end of the frame (1) is also provided with a window (14), and a tray (13) is installed at the bottom of the window (14).

9. A sampling device for detecting pesticide residues in food according to claim 4, characterized in that: The driving assembly (6) includes a second servo motor (60) and a second lead screw (61). The second servo motor (60) is installed at the front end of the frame (1) and the output end of the second servo motor (60) is connected to the second lead screw (61). The second lead screw (61) is installed in the frame (1) and is connected to a connecting seat (62) provided on the side of the cylinder (30) by means of a lead screw nut.

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