Sampling device for vegetable pesticide residues

Abstract

The utility model discloses a sampling device for vegetable pesticide residues, and aims to provide a sampling device for vegetable pesticide residues, which can increase the working probability of cutting in contact with vegetables. The device comprises a mounting base and a sampling assembly, the sampling assembly comprises a sampling tank body, a sampling tank bottom and a sampling top cover, the sampling top cover and the sampling tank bottom are detachably connected with the sampling tank body, the sampling tank bottom is detachably connected with the mounting base, and the two ends of a rotating shaft are detachably connected with the sampling top cover and the sampling tank bottom respectively. The rotating shaft is sleeved with a plurality of rotating discs, the cutting knives are symmetrically distributed with the rotating shaft as the center, and the cutting holes are evenly distributed from the front ends to the rear ends of the cutting knives. The vegetable cutter has the beneficial effects that the purpose of increasing the working probability of cutting in contact with vegetables can be achieved; the discharging and collecting work of collected vegetable pesticide residues is facilitated; and mounting and limiting of the cutting knife are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, and in particular to a sampling device for pesticide residues in vegetables. Background Technology

[0002] With the continuous advancement of cultivation techniques, the growth period of vegetables has become shorter and shorter. Most vegetables need to be treated with pesticides multiple times before they can mature and be sold on the market. Pesticide pollution is naturally a major concern. Whether it is fibrous vegetables, root vegetables or leafy vegetables, the issue of pesticide residues needs to be sampled and tested.

[0003] Currently, when testing pesticide content in vegetables, the common method is to soak the vegetables in water or rinse them with water to remove the pesticides. Regardless of the method, there are always corresponding problems, such as insufficient pesticide dosage, inaccurate sampling location (inside or outside the vegetable), and inaccurate sampling time. Therefore, the structure and technology of sampling devices for pesticide residues in vegetables need to be updated to address these issues in order to obtain more accurate results more quickly.

[0004] Chinese Patent Announcement No. CN211179160U, Announcement Date: August 4, 2020, discloses a sampling device for detecting pesticide residues in vegetables. The device includes a base plate with a placement groove at the top. An open-top can is placed inside the placement groove. Limiting grooves are formed on both sides of the base plate. Positioning components are provided on both sides of the open-top can, with the ends of the positioning components extending into the limiting grooves. A scraper is placed inside the open-top can, and a drive rod is fixedly connected to the scraper. A pressure block is fixedly connected to the top of the drive rod, and the outer wall of the pressure block is slidably connected to the inner wall of the open-top can. A crushing blade is fixedly installed on the outer wall of the drive rod. A storage groove is formed horizontally inside the base plate, communicating with the placement groove. An opening is formed at the bottom of the base plate, communicating with the storage groove. A baffle is slidably connected inside the storage groove, with the top of the baffle pressing against the bottom of the open-top can. A leak is formed at the bottom of the open-top can, and a filter screen is fixedly fitted inside the leak. The drawback of this technical solution is that when sampling pesticides from vegetables, the vegetables are placed inside an open container, immersed in liquid water, and cut by rotating shredder blades. However, the shredder blades are of a flat structure, and no additional components are added inside the open container for repeated or further cutting. This increases the likelihood that vegetables will fall to the bottom of the open container without being cut, directly affecting the effectiveness of pesticide collection and sampling. Consequently, the accuracy of pesticide content readings will be affected, requiring multiple samplings to complete the sampling, which is inconvenient.

[0005] In summary, a structure can be designed to reduce the probability of vegetables falling to the bottom of the can without being cut. Utility Model Content

[0006] The present invention aims to overcome the shortcomings of existing sampling devices that do not include repeat cutting or further cutting components, and provides a sampling device for pesticide residues in vegetables that increases the probability of contact with vegetables during cutting.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sampling device for pesticide residues in vegetables includes a mounting base and a sampling assembly. The sampling assembly includes a sampling canister, a sampling canister bottom, and a sampling top cover. The top of the sampling canister is detachably connected to the sampling top cover, and the bottom of the sampling canister is detachably connected to the sampling canister bottom. The sampling canister bottom is detachably connected to the mounting base. A rotating shaft is fitted inside the sampling canister. The two ends of the rotating shaft are detachably connected to the sampling top cover and the sampling canister bottom, respectively. A plurality of turntables are mounted on the rotating shaft and are evenly distributed from the top to the bottom of the sampling canister. A plurality of cutting blades are mounted on the turntables and are symmetrically distributed around the rotating shaft. The front end of each cutting blade is connected to a turntable, and the rear end of each cutting blade is placed inside the sampling canister. Each cutting blade has a plurality of cutting holes evenly distributed from the front end to the rear end.

[0009] This design, using a mounting base and sampling components, allows for the installation of a vegetable pesticide residue sampling device. The sampling components include a sampling canister, a sampling canister bottom, and a sampling top cover. The top of the sampling canister and the sampling top cover are detachably connected, as are the bottom of the sampling canister. In other words, the installation and removal of the sampling canister bottom and sampling top cover can be controlled under normal conditions, allowing the sampling canister to be either open or closed. The detachable connection between the sampling canister bottom and the mounting base facilitates the installation and removal of the sampling components, ensuring the sampling components are stably positioned on the mounting base and allowing for control at any time, enabling the sampling components to be removed from the mounting base. The sampling assembly is used to sample pesticide residues on vegetables. A rotating shaft is housed within the sampling container, with its two ends detachably connected to the top and bottom of the container. This allows the shaft to rotate stably and smoothly, constrained by the top and bottom of the container. Several turntables are mounted on the shaft, evenly distributed from top to bottom of the container. The rotation of the shaft drives the rotation of these turntables, thus cutting the vegetables inside the container. Since cutting requires contact, several cutting blades are mounted on the turntables, symmetrically distributed around the rotating shaft. The front ends of the blades are connected to the turntables, while their rear ends are positioned inside the container. The cutting of the vegetables occurs through contact with these blades. However, typically, the cutting blades only contact the vegetables at their edges. Meanwhile, the cutting blade has several cutting holes evenly distributed from the front to the back. This allows small vegetables, or vegetables cut into small pieces, to float to the cutting holes and be tightly cut by the rotation and effect of the cutting blade. This not only cuts the vegetables into smaller pieces but also increases the contact area between the vegetables and the cutting process, thus increasing the probability of cutting through contact with the vegetables. After cutting, the collected liquid water (containing pesticide residues from the collected vegetables) can be tested to complete the process.

[0010] Preferably, the cutting blade has a fan-shaped cross-section, with the width of the rear end of the cutting blade greater than the width of the front end, and a gap between adjacent cutting blades. This design, by setting the cross-sectional shape of the cutting blade to a fan shape, increases the contact point length of the outer edge of the cutting blade, thus increasing the probability of contact with the vegetables. The greater width of the rear end of the cutting blade compared to the front end, along with the gap between adjacent cutting blades, allows the vegetables to float between the cutting blades, facilitating easy placement and cutting for sampling of pesticide residues.

[0011] Preferably, the diameters of the cutting holes are unequal, increasing sequentially from the front to the rear of the cutting blade. This design, by setting the diameters of several cutting holes to be unequal and increasing sequentially from the front to the rear of the cutting blade, increases the probability of vegetables being cut and reduces the likelihood of larger vegetables avoiding the cutting holes, thus increasing the probability of cutting.

[0012] Preferably, the sampling top cover is provided with an annular groove and a rotating top hole. The annular groove matches the top of the sampling container, and the top of the rotating shaft matches the rotating top hole. This design, with the annular groove matching the top of the sampling container, allows the top of the container to be inserted into the annular groove, facilitating the installation and positioning of the container top and the sampling top cover. The rotating shaft's top end, also matching the rotating top hole, can pass through the hole, thus being positioned within the sampling top cover's limiting effect. This also allows for the installation of external drive mechanisms, such as a motor. Connecting the motor shaft to the top of the rotating shaft enables the motor to operate, rotating the rotating shaft and allowing the cutting blade mounted on the rotating shaft to smoothly cut vegetables, thus facilitating pesticide residue sampling.

[0013] Preferably, the sampling container has a rotating bottom hole, and a plug is installed at the rotating bottom hole. The plug matches the rotating bottom hole, and the bottom end of the rotating shaft is detachably connected to the plug. This design, by providing a rotating bottom hole at the bottom of the sampling container and installing a plug therein, allows control over the opening and closing of the rotating bottom hole. Opening the rotating bottom hole allows the cut vegetables and collected pesticide residues inside the sampling container to flow out for testing. Closing the rotating bottom hole, because the bottom end of the rotating shaft is detachably connected to the plug, ensures a smooth connection between the bottom end of the rotating shaft and the bottom of the sampling container, allowing the rotating shaft to rotate stably with the support of the bottom of the sampling container.

[0014] Preferably, the mounting base is provided with an insertion hole, a bottom hole, and a through slot. The insertion hole and bottom hole communicate with the through slot, and are located at the upper and lower ends of the through slot, respectively. The bottom of the sampling container matches the insertion hole. The through slot includes an opening and a bottom. The opening is located at the front end of the mounting base, and the bottom is located between the front and rear ends of the mounting base. A base insert plate is installed at the through slot, and the base insert plate is detachably connected to the mounting base. The length of the base insert plate is greater than the length of the through slot. This design, by providing an insertion hole, bottom hole, and through slot on the mounting base, with the insertion hole and bottom hole communicating with the through slot and located at the upper and lower ends of the through slot, allows liquid water to flow between the insertion hole, bottom hole, and through slot. The bottom of the sampling container matches the insertion hole, allowing the bottom of the sampling container to be inserted into the mounting base and restrained by the mounting base. The slot consists of an opening and a bottom. The opening is located at the front end of the mounting base, and the bottom is positioned between the front and rear ends of the mounting base. A base insert is installed at the slot. This base insert is detachably connected to the mounting base, allowing control over its insertion and removal within the slot to open or close the bottom hole for the drainage of liquid water, facilitating the collection and testing of pesticide residues in vegetables. The design of the base insert being longer than the slot ensures that even when inserted into the slot, a portion of the base insert remains outside the slot, facilitating manual control of the base insert.

[0015] The beneficial effects of this utility model are: it can increase the probability of cutting the vegetables; it facilitates the collection and discharge of pesticide residues from the vegetables; and it makes the installation and positioning of the cutting blade more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of this utility model;

[0018] Figure 3 This is a schematic diagram showing the distribution of the cutting blades of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the mounting base of this utility model;

[0020] Figure 5 This is a schematic diagram of the sampling top structure of this utility model.

[0021] In the diagram: 1. Mounting base, 2. Sampling tank body, 3. Sampling top cover, 4. Sampling tank bottom, 5. Annular groove, 6. Rotating top hole, 7. Rotating bottom hole, 8. Tank plug, 9. Insertion hole, 10. Bottom hole, 11. Through slot, 12. Base insert plate, 13. Rotating shaft, 14. Cutting blade, 15. Cutting hole. Detailed Implementation

[0022] The utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 , Figure 2 and Figure 3 In the illustrated implementation example, a sampling device for pesticide residues in vegetables includes a mounting base 1 and a sampling assembly. The sampling assembly includes a sampling tank 2, a sampling tank bottom 4, and a sampling top cover 3. The top of the sampling tank 2 is detachably connected to the sampling top cover 3, and the bottom of the sampling tank 2 is detachably connected to the sampling tank bottom 4. The sampling tank bottom 4 is detachably connected to the mounting base 1. A rotating shaft 13 is installed inside the sampling tank 2. Both ends of the rotating shaft 13 are detachably connected to the sampling top cover 3 and the sampling tank bottom 4, respectively. Several turntables are mounted on the rotating shaft 13. The turntables are evenly distributed from the top to the bottom of the sampling tank 2. Several cutting blades 14 are installed on the turntables. The cutting blades 14 are symmetrically distributed around the rotating shaft 13. The front end of the cutting blade 14 is connected to the turntable, and the rear end of the cutting blade 14 is placed inside the sampling tank 2. Several cutting holes 15 are provided on the cutting blade 14. The cutting holes 15 are evenly distributed from the front end to the rear end of the cutting blade 14.

[0024] like Figure 3 As shown, the cross-sectional shape of the cutting blade 14 is fan-shaped, and the width of the rear end of the cutting blade 14 is greater than the width of the front end of the cutting blade 14. There is a gap between adjacent cutting blades 14. The diameters of the cutting holes 15 are not equal, and the diameters of the cutting holes 15 increase sequentially from the front end to the rear end of the cutting blade 14.

[0025] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the sampling top cover 3 is provided with an annular groove 5 and a rotating top hole 6. The annular groove 5 matches the top of the sampling tank 2, and the top of the rotating shaft 13 matches the rotating top hole 6. The sampling tank bottom 4 is provided with a rotating bottom hole 7, and a tank plug 8 is installed at the rotating bottom hole 7. The tank plug 8 matches the rotating bottom hole 7, and the bottom end of the rotating shaft 13 is detachably connected to the tank plug 8. The mounting base 1 is provided with an insertion hole 9, a bottom hole 10, and a through slot 11. The insertion hole 9 and the bottom hole 10 are both connected to the through slot 11. The insertion hole 9 and the bottom hole 10 are respectively located at the upper and lower ends of the through slot 11. The sampling tank bottom 4 matches the insertion hole 9. The through slot 11 includes a groove opening and a groove bottom. The groove opening is located at the front end of the mounting base 1, and the groove bottom is located between the front end and the rear end of the mounting base 1. A base insert plate 12 is installed at the through slot 11. The base insert plate 12 is detachably connected to the mounting base 1, and the length of the base insert plate 12 is greater than the length of the through slot 11.

[0026] First, the sampling device for pesticide residues in vegetables needs to be installed. This device includes a mounting base 1 and a sampling assembly. The sampling assembly includes a sampling tank 2, a sampling tank bottom 4, and a sampling top cover 3. The mounting base 1 has an insertion hole 9, a bottom hole 10, and a through slot 11. The insertion hole 9 and the bottom hole 10 are both connected to the through slot 11. The insertion hole 9 and the bottom hole 10 are located at the upper and lower ends of the through slot 11, respectively. The through slot 11 includes a groove opening and a groove bottom. The groove opening is located at the front end of the mounting base 1, and the groove bottom is located between the front and rear ends of the mounting base 1. A base plate 12 is installed at the mounting base 1. The base plate 12 is detachably connected to the mounting base 1. The length of the base plate 12 is also greater than the length of the through slot 11. Therefore, it is necessary to control one end of the base plate 12 to be inserted into the through slot 11 until it contacts the bottom of the groove between the front and rear ends of the mounting base 1. This not only blocks the insertion hole 9 and the bottom hole 10, but also allows the other end of the base plate 12 to be placed outside the through slot 11. In this way, the base plate 12 can be manually controlled to open or close the insertion hole 9 and the bottom hole 10.

[0027] Next, the bottom of the sampling tank 2 needs to be installed and connected to the bottom of the sampling tank 4. This connection can be made by welding, so that the bottom of the sampling tank 2 and the bottom of the sampling tank 4 are welded in a closed manner, so that the sampling tank 2 can work stably under the support of the bottom of the sampling tank 4. Then, the rotating shaft 13, which contains several turntables, can be installed into the sampling tank 2. The bottom end of the rotating shaft 13 needs to be supported and limited. The bottom of the sampling tank 4 is provided with a rotating bottom hole 7, and the mounting base 1 is provided with an insertion hole 9. In order to facilitate the installation of the bottom end of the rotating shaft 13, the plug 8 can be controlled to connect with the bottom of the sampling tank 4. The plug 8 and the rotating bottom hole 7 are matched. The plug 8 is provided with a plug thread, and the rotating bottom hole 7 is provided with a rotating bottom hole thread. With the matching plug thread and rotating bottom hole thread, the plug 8 can be successfully connected to the bottom of the sampling tank 4. In addition, the plug 8 also needs to be provided with a rotating groove. The bottom end of the rotating shaft 13 needs to be inserted into the rotating groove so that the rotating shaft 13 is supported and limited by the bottom of the sampling tank 4, so that the rotating shaft 13 can rotate stably.

[0028] Then, the sampling top cover 3 is inserted into the top of the sampling tank 2. This sampling top cover 3 has an annular groove 5 and a rotating top hole 6. The annular groove 5 matches the top of the sampling tank 2, allowing the top of the sampling tank 2 to be smoothly inserted into the annular groove 5. To ensure a stable connection between the sampling top cover 3 and the sampling tank 2, a sampling top cover thread can be provided at the edge of the sampling top cover 3, and a sampling tank thread can be provided at the top of the sampling tank 2. With the matching sampling top cover thread and sampling tank thread, the connection between the sampling top cover 3 and the sampling tank 2 is achieved. This allows for smooth operation. Meanwhile, since the top of the rotating shaft 13 matches the rotating top hole 6, when connecting the sampling top cover 3, the top of the rotating shaft 13 can pass through the rotating top hole 6 and be placed at the outer end of the sampling top cover 3. Then, the motor shaft of the motor that is electrically connected to the switch assembly can be properly connected to the top of the rotating shaft 13. In order to facilitate control of the rotating shaft 13 to rotate clockwise or counterclockwise, this motor can be a servo motor. Of course, the power supply needs to be electrically connected to the external power supply so that the servo motor can work smoothly.

[0029] Sampling for pesticide residues in vegetables is now necessary. First, open the sampling top cover 3 and place the vegetables and liquid water inside. For easier vegetable placement, openings can be directly provided on the sampling top cover 3. All types of vegetables, including fibrous, root, and leafy vegetables, can be placed inside. Several turntables are evenly distributed from top to bottom of the sampling tank 2. Each turntable is equipped with several cutting blades 14, symmetrically distributed around a rotating shaft 13. The front end of each cutting blade 14 is connected to the turntable, and the rear end is placed inside the sampling tank 2. Each cutting blade 14 has several cutting holes 15, evenly distributed from front to rear. Controlling the switching assembly to rotate the rotating shaft 13 allows the outer edge of the cutting blades 14 to contact the vegetables, cutting them and removing pesticide residues. Drug residues mix into the liquid water, and the cutting hole 15 is designed to allow small-volume vegetables or vegetables to be cut to pass through the cutting hole 15 and be cut, thus increasing the chance of the vegetables being cut. The cross-sectional shape of the cutting blade 14 is fan-shaped, which increases the length of the contact edge between the cutting blade 14 and the vegetables. There is a gap between adjacent cutting blades 14, allowing the vegetables to float smoothly in the sampling tank 2, thereby being cut. The design of the cutting blade 14 and the cutting hole 15 here achieves the purpose of increasing the probability of contact with the vegetables for cutting.

[0030] Finally, the liquid water containing pesticide residues from vegetables can be smoothly discharged and collected through the control of the base plate 12 and the can stopper 8, so as to be tested.

[0031] Of course, cutting fibrous, root, or leafy vegetables is indeed for sampling pesticide residues. However, to extract pesticide residues from vegetables, they need to be squeezed. Here, in addition to the sampling device being manually controlled to squeeze the vegetables, rotating threads one and two can be set on the rotating shaft 13, with rotating threads two between adjacent rotating threads one and rotating threads one between adjacent rotating threads two. Rotating threads three need to be set on the turntable. Rotating threads one and two are set in opposite directions, and rotating threads three are matched with these two. So, during the rotation of the motor shaft, adjacent turntables can be controlled to move towards each other or in opposite directions, which means that adjacent cutting blades 14 can be controlled to squeeze the vegetables. In this way, small-volume vegetables can be squeezed, and pesticide residues can be squeezed out.

Claims

1. A sampling device for pesticide residues in vegetables, characterized in that, The utility model provides a sampling device, including installation base (1) and sampling assembly, sampling assembly includes sampling jar body (2), sampling jar bottom (4) and sampling top cover (3), the top end of sampling jar body (2) is detachably connected with sampling top cover (3), the bottom end of sampling jar body (2) is detachably connected with sampling jar bottom (4), sampling jar bottom (4) is detachably connected with installation base (1), sampling jar body (2) is sleeved with rotating shaft (13), the both ends of rotating shaft (13) are detachably connected with sampling top cover (3) and sampling jar bottom (4) respectively, rotating shaft (13) is sleeved with a plurality of rotating discs, a plurality of rotating discs are evenly distributed from the top end to the bottom end of sampling jar body (2), a plurality of cutting knives (14) are installed on the rotating disc, a plurality of cutting knives (14) are symmetrically distributed with rotating shaft (13) as center, the front end of cutting knife (14) is connected with rotating disc, the rear end of cutting knife (14) is placed in sampling jar body (2), a plurality of cutting holes (15) are arranged on cutting knife (14), a plurality of cutting holes (15) are evenly distributed from the front end to the rear end of cutting knife (14).

2. The sampling device for pesticide residues in vegetables according to claim 1, characterized in that, The cross section of the cutting knife (14) is in the shape of a sector, the width of the rear end of the cutting knife (14) is greater than the width of the front end of the cutting knife (14), and a gap is left between adjacent cutting knives (14).

3. The sampling device for pesticide residues in vegetables according to claim 2, characterized in that, The diameters of the cutting holes (15) are not equal, and the diameters of the cutting holes (15) increase from the front end to the rear end of the cutting knife (14).

4. The sampling device for pesticide residues in vegetables according to claim 1, characterized in that, The sampling top cover (3) is provided with an annular groove (5) and a rotating top hole (6), the annular groove (5) matches the top end of the sampling jar body (2), and the top end of the rotating shaft (13) matches the rotating top hole (6).

5. The sampling device for pesticide residues in vegetables according to claim 1, wherein The sampling jar bottom (4) is provided with a rotating bottom hole (7), the jar plug (8) is installed at the rotating bottom hole (7), the rotating bottom hole (7) matches the jar plug (8), and the bottom end of the rotating shaft (13) is detachably connected with the jar plug (8).

6. The sampling device for pesticide residues in vegetables according to claim 1, wherein The installation base (1) is provided with a plug hole (9), a bottom hole (10) and a plug slot (11), the plug hole (9) and the bottom hole (10) communicate with the plug slot (11), the plug hole (9) and the bottom hole (10) are respectively arranged at the upper and lower ends of the plug slot (11), the sampling jar bottom (4) matches the plug hole (9), the plug slot (11) includes a slot opening and a slot bottom, the slot opening is arranged at the front end of the installation base (1), and the slot bottom is arranged between the front end and the rear end of the installation base (1), the installation base (1) is provided with a base plug plate (12) at the plug slot (11), the base plug plate (12) is detachably connected with the installation base (1), and the length of the base plug plate (12) is greater than the length of the plug slot (11).

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