Rapid sampling device for pesticides

Abstract

The utility model provides a kind of pesticide rapid sampling device, it includes vertical plate, pipet, test tube, tee, pipeline, piston rod, pipet is fixedly arranged in the one side of vertical plate, test tube is fixedly arranged in the other side of vertical plate, pipet bottom end is fixedly arranged with tee, another two interfaces of tee are respectively installed with liquid suction nozzle and pipeline, pipeline is communicated with test tube, piston rod is set in pipet, pesticide is drawn into pipet from barrel, then from pipet into test tube again.The pesticide rapid sampling device of the utility model, piston rod single reciprocation can complete "liquid pumping-transferring" closed loop, avoid multiple exploration, ensure that sampling amount is constant;First driving part is coordinated with check valve, eliminates manual power difference, prevents sample backflow;Needle punctures after sealing cover self-closing, realizes test tube immediately takes and seals, avoids volatilization and leakage;Base spring and clamping piece arc plate jointly provide flexible support and large-area clamping, prevent test tube breakage and slip, improve operation safety and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pesticide testing equipment technology, and in particular to a rapid pesticide sampling device. Background Technology

[0002] As agriculture moves towards precision and traceability, batch sampling of pesticides has become a crucial step in ensuring the quality and safety of agricultural products and compliance with trade regulations. Efficient and standardized sampling methods not only shorten testing cycles but also provide reliable data for risk tracing. Therefore, regulatory rules all list rapid on-site sampling as a mandatory step in enterprise quality control.

[0003] In the existing technology, the most common practice still relies on a simple combination of tools: the operator holds a long-handled spoon or glass pipette and repeatedly probes into the packaging barrel to extract the liquid, and then uses a funnel to transfer it into a sample bottle; another option is to temporarily open a hole in the barrel wall and install a hand valve to collect the liquid by gravity.

[0004] However, when using simple tools for sampling, it is difficult to keep the liquid level in the container consistent with the tool's immersion angle, resulting in large fluctuations in the sample volume and poor repeatability. Furthermore, repeated opening of the container can easily cause solvent evaporation and personnel exposure, which are prominent drawbacks that restrict the accuracy of testing and the safety of the operation. Utility Model Content

[0005] The purpose of this invention is to propose a rapid pesticide sampling device to solve the problems of unstable sampling volume, poor repeatability, and personnel exposure caused by existing simple tools.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A rapid pesticide sampling device includes a standing plate; a pipette fixedly disposed on one side of the standing plate; a test tube fixedly disposed on the other side of the standing plate; a T-junction fixedly disposed at the bottom end of the pipette, the other two ports of the T-junction being respectively equipped with a suction nozzle and a pipeline, the pipeline being connected to the test tube; and a piston rod telescopically disposed inside the pipette, the piston rod drawing the sample into the pipette and then pushing it into the test tube.

[0007] By adopting the above technical solutions, the piston rod can complete the "liquid extraction-transfer" closed loop in a single reciprocating motion, avoiding multiple insertions and ensuring a constant sampling volume; the upright plate integrates the pipette and test tube into a rigid whole, and the insertion depth is limited by the plate body, eliminating human angle errors and improving repeatability accuracy; the closed pipeline isolates volatilization and reduces the risk of personnel contact.

[0008] Furthermore, the upright plate is provided with a first driving member for driving the piston rod to move, and a one-way valve is provided between the liquid suction nozzle and the three-way valve.

[0009] By adopting the above technical solution, the first driving component provides stable thrust, eliminates the difference in manual force, and further ensures that the sample volume is consistent each time; the one-way valve opens when drawing back and closes when pushing liquid to prevent sample backflow, ensure that the liquid in the test tube is retained at one time, and improve the sampling success rate.

[0010] Furthermore, the test tube is provided with a cap at the opening, and a needle is slidably disposed on the upright plate for insertion into the cap, and the tubing is connected to the needle.

[0011] By adopting the above technical solution, the needle punctures and seals to form an instantaneous channel. After sampling, the needle is withdrawn, and the seal is elastically self-sealing, realizing immediate sealing of the test tube and avoiding volatilization and leakage during the transfer process.

[0012] Furthermore, the upright plate is provided with a second driving member that drives the needle to insert into the cap. The moving end of the second driving member is equipped with a clamping plate, and a connector is held in the clamping plate. The needle is installed on the connector, and the pipeline is connected to the connector.

[0013] By adopting the above technical solution, the second drive component precisely controls the needle stroke, ensuring consistent insertion depth and preventing over-insertion that could lead to contamination by capping debris; the connector and clamp can be quickly disassembled and assembled, facilitating needle maintenance or replacement and improving equipment maintenance efficiency.

[0014] Furthermore, the upright plate is provided with a base for mounting the test tube and a clamp for holding the test tube.

[0015] By adopting the above technical solution, the base and clamp form a dual-point positioning, and the test tube remains vertically fixed throughout the sampling process, eliminating the tilting of the liquid surface caused by shaking and ensuring that the needle is accurately aligned with the center of the cap.

[0016] Furthermore, the base includes a base plate vertically disposed on the upright plate, a stud screwed onto the base plate, and a seat body elastically connected to the stud, wherein the bottom of the seat body has a through hole for inserting the stud.

[0017] By adopting the above technical solution, the stud-seat sliding pair allows the seat to float slightly in the axial direction, compensates for the test tube length tolerance, avoids stress concentration at the bottom of the test tube caused by hard pressure, and extends the service life of the test tube.

[0018] Furthermore, the base has a groove with the same shape as the bottom of the test tube, and a spring is provided between the stud and the base.

[0019] By adopting the above technical solution, the groove forms a radial limit on the bottom of the test tube, and the spring provides flexible support. When the needle is inserted and a reverse thrust is generated, the spring absorbs the impact, preventing the bottom of the test tube from breaking and improving operational safety.

[0020] Furthermore, the clamp includes a connecting plate fixedly mounted on the upright plate, a left clamp fixedly mounted on the connecting plate, and a right clamp rotatably connected to the left clamp, with a tension spring provided between the left clamp and the right clamp.

[0021] By adopting the above technical solution, the tension spring continuously provides clamping force, enabling the left and right clamps to automatically adapt to the deviation of the outer diameter of the test tube, realize single-handed opening and closing, quick picking and placing, and improve on-site operation efficiency; the rotating connection structure has no additional locking parts, reducing failure points.

[0022] Furthermore, the left clamp and the right clamp are respectively provided with arc-shaped plates similar to the sidewall of the test tube.

[0023] By adopting the above technical solution, the arc plate increases the contact area with the test tube, disperses the clamping stress, avoids point contact causing local deformation or breakage of the test tube, and at the same time increases the frictional resistance to prevent the test tube from rotating or slipping during the sampling process.

[0024] Compared with the prior art, the present invention has the following beneficial effects: The pesticide rapid sampling device of this utility model can complete the "liquid extraction-transfer" closed loop with a single reciprocating motion of the piston rod, avoiding multiple insertions and ensuring a constant sampling volume; the first driving component and the one-way valve work together to eliminate differences in manual force, prevent sample backflow, and improve the sampling success rate; the needle self-seales after piercing and capping, realizing immediate sealing of the test tube and avoiding volatilization and leakage; the base spring and the arc-shaped clamping plate together provide flexible support and large-area clamping, preventing test tube breakage and slippage, and improving operational safety and efficiency. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0026] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the pesticide rapid sampling device described in this embodiment of the utility model; Figure 2 This is a schematic diagram of the telescopic rod portion described in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the needle portion as described in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the base and clamping parts described in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the base as described in an embodiment of the present utility model; Figure 6 This is a cross-sectional view of the base as described in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the clamping component described in an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures: 1. Stand plate; 2. Pipette; 3. Test tube; 4. T-connector; 5. Suction nozzle; 6. Tubing; 7. Piston rod; 8. First drive component; 9. Check valve; 10. Cap; 11. Needle; 12. Second drive component; 13. Clamping plate; 14. Connector; 15. Base; 1501. Base plate; 1502. Stud; 1503. Seat body; 1504. Through hole; 1505. Groove; 1506. Spring; 16. Clamping component; 1601. Connecting plate; 1602. Left clamp; 1603. Right clamp; 1604. Tension spring; 1605. Curved plate. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "back" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] This embodiment relates to a rapid pesticide sampling device. In terms of its overall structure, as follows: Figure 1 and Figure 2 As shown, it includes a vertical plate 1, a straw 2, a test tube 3, a tee 4, a pipe 6, and a piston rod 7.

[0033] The pipette 2 is fixedly installed on one side of the upright plate 1, and the test tube 3 is fixedly installed on the other side of the upright plate 1. A three-way valve 4 is fixedly installed at the bottom of the pipette 2. The other two ports of the three-way valve 4 are respectively equipped with a liquid suction nozzle 5 and a pipe 6. The pipe 6 is connected to the test tube 3. The piston rod 7 is telescopically installed inside the pipette 2 to draw pesticide from the bucket into the pipette 2, and then from the pipette 2 into the test tube 3.

[0034] It is worth mentioning that the upright plate 1 is used to install various accessories, improving the compactness of the device. The pipette 2 is located at the bottom of the upright plate 1, and the suction nozzle 5 is installed at the bottom of the pipette 2. This arrangement ensures that the suction nozzle 5 can extend below the liquid level, while the upright plate 1 and various accessories will not be immersed in the pesticide, thus improving the service life of the equipment. The relative arrangement of the test tube 3 and the pipette 2 reduces space occupation and allows for a reasonable installation position, facilitating the sampling device to enter the tank for sampling. The T-junction 4 ensures the connection between the test tube 3 and the pipette 2, ensuring that the pesticide can enter the test tube from the pipette 2. The tube 3 facilitates the preservation of the extracted samples. The piston rod 7 can draw pesticides from the container into the pipette 2. A first driving component 8 that drives the piston rod 7 can be set on the upright plate 1. The first driving component 8 can be a linear module such as a slide table or electric cylinder, thereby realizing automatic sampling and avoiding the inconvenience caused by manual pulling. A one-way valve 9 can also be set between the liquid extraction nozzle 5 and the three-way valve 4. When the piston rod 7 draws pesticides into the pipette 2, the one-way valve 9 opens, and when the piston rod 7 pushes pesticides from the pipette 2 into the test tube 3, the one-way valve 9 closes. This setting ensures that pesticides can be stored in the test tube 3.

[0035] Based on the above overall introduction, an exemplary structure of the pesticide rapid sampling device in this embodiment is as follows: Figure 3 and Figure 4 As shown, a cap 10 is provided at the opening of test tube 3, and a needle 11 is slidably mounted on the upright plate 1 for insertion into the cap 10. The tubing 6 is connected to the needle 11. It should be noted that the cap 10 can be made of rubber to facilitate the insertion of the needle 11 and prevent pesticide leakage. The needle 11 facilitates the separation of test tube 3 and pipette 2, allowing test tube 3 to be removed from the upright plate 1. A second driving component 12 is provided on the upright plate 1, and a clamping plate 13 is installed at the moving end of the second driving component 12. A connector 14 is clamped in the clamping plate 13, and the needle 11 is mounted on the connector 14. The tubing 6 is connected to the connector 14. The second driving component 12 can be an electric cylinder, and the tubing 6 is a flexible tube. The second driving component 12 drives the connector 14 to move, and the needle 11 follows the connector 14 until it is inserted into the cap 10. This arrangement facilitates the control of the connection and disconnection between the tubing 6 and the test tube 3.

[0036] As a preferred option, such as Figure 4As shown, in this embodiment, the upright plate 1 is provided with a base 15 for mounting the test tube 3 and a clamp 16 for holding the test tube 3. Specifically, the bottom of the test tube 3 can be inserted into the base 15, and the clamp 16 can clamp the side wall of the test tube 3, thereby improving the stability of the test tube 3, preventing the test tube 3 from falling, and facilitating the installation and removal of the test tube 3, thereby improving convenience. The base 15 and the connector 14 are arranged coaxially to ensure that the needle 11 can be directly inserted into the cap 10.

[0037] As a preferred implementation method, such as Figure 5 and Figure 6 As shown, the base 15 of this embodiment includes a base plate 1501 vertically disposed on the upright plate 1, a stud 1502 screwed onto the base plate 1501, and a seat body 1503 elastically connected to the stud 1502. The seat body 1503 has a groove 1505 with the same shape as the bottom of the test tube 3. It should be noted that the base plate 1501 and the second driving component 12 are arranged opposite each other. The stud 1502 is set to facilitate the connection between the base 1503 and the base plate 1501. The bottom of the test tube 3 is inserted into the groove 1505 of the base 1503. A cotton pad can be laid in the groove 1505 to avoid damage to the test tube 3. The bottom of the base 1503 has a through hole 1504 for the stud 1502 to be inserted. A spring 1506 is set between the stud 1502 and the base 1503. The two ends of the spring 1506 are connected to the stud 1502 and the base 15 respectively. This arrangement ensures that the test tube 3 can provide a buffering force, thereby improving the safety of the test tube 3 and preventing the test tube 3 from being easily damaged when the needle 11 is inserted into the cap 10 without buffering force.

[0038] As a preferred implementation method, such as Figure 7As shown, the clamp 16 in this embodiment includes a connecting plate 1601 fixedly mounted on the upright plate 1, a left clamp 1602 fixedly mounted on the connecting plate 1601, and a right clamp 1603 rotatably connected to the left clamp 1602. The left clamp 1602 and the right clamp 1603 are respectively provided with arc-shaped plates 1605 similar to the side wall of the test tube 3, and a tension spring 1604 is provided between the left clamp 1602 and the right clamp 1603. It should be noted that the connecting plate 1601 and the upright plate 1 are set vertically. The connecting plate 1601 ensures that the clamp 16 can hold the test tube 3 and ensures that the test tube 3 and the connector 14 are arranged coaxially. The left clamp 1602 and the connecting plate 1601 are fixedly set, and the right clamp 1603 can open and close on the left clamp 1602. This setting can hold the test tube 3. The setting of the arc plate 1605 can improve the stability of the test tube 3 clamping and prevent the test tube 3 from shaking. The setting of the tension spring 1604 can ensure that the arc plate 1605 always clamps the test tube 3, thereby improving the clamping force. After the pesticide is poured into the test tube 3, the test tube 3 can be directly removed from the clamp 16. At this time, the needle 11 has been pulled out from the cap 10. This setting facilitates sampling and improves efficiency. When sampling, the liquid extraction nozzle 5 is facing down and directly inserted into the pesticide. After the sampling is completed, the device is inverted. At this time, the mouth of the test tube 3 is facing up, and the test tube 3 with the sample can be directly removed.

[0039] In this embodiment, the pesticide rapid sampling device allows the piston rod 7 to complete the "liquid extraction-transfer" closed loop with a single reciprocating motion, avoiding multiple insertions and ensuring a constant sampling volume. The first driving component 8 works in conjunction with the one-way valve 9 to eliminate differences in manual force, prevent sample backflow, and improve the sampling success rate. The needle 11 self-closes after piercing the cap 10, enabling immediate sealing of the test tube 3 and preventing volatilization and leakage. The base 15, spring 1506, and clamp 16, arc plate 1605 together provide flexible support and large-area clamping, preventing the test tube 3 from breaking or slipping, and improving operational safety and efficiency.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid pesticide sampling device, characterized in that, include: Elevating board (1); A straw (2) is fixedly installed on one side of the upright plate (1); Test tube (3) is fixedly installed on the other side of the upright plate (1); A three-way connector (4) is fixedly installed at the bottom end of the pipette (2). The other two ports of the three-way connector (4) are respectively equipped with a suction nozzle (5) and a pipeline (6). The pipeline (6) is connected to the test tube (3). The piston rod (7) is telescopically positioned inside the pipette (2). The piston rod (7) draws the sample into the pipette (2) and then pushes it into the test tube (3).

2. The pesticide rapid sampling device according to claim 1, characterized in that: The upright plate (1) is provided with a first driving member (8) for driving the piston rod (7) to move, and a one-way valve (9) is provided between the liquid suction nozzle (5) and the three-way valve (4).

3. The pesticide rapid sampling device according to claim 1, characterized in that: The test tube (3) is provided with a cap (10) at the opening, and a needle (11) is slidably provided on the upright plate (1) for insertion into the cap (10). The tube (6) is connected to the needle (11).

4. The pesticide rapid sampling device according to claim 3, characterized in that: The upright plate (1) is provided with a second driving member (12) that drives the needle (11) to insert into the cover (10). The moving end of the second driving member (12) is equipped with a clamp (13). The clamp (13) holds a connector (14). The needle (11) is installed on the connector (14). The pipeline (6) is connected to the connector (14).

5. The pesticide rapid sampling device according to claim 1, characterized in that: The upright plate (1) is provided with a base (15) for mounting the test tube (3) and a clamp (16) for holding the test tube (3).

6. The pesticide rapid sampling device according to claim 5, characterized in that: The base (15) includes a base plate (1501) vertically disposed on the upright plate (1), a stud (1502) screwed onto the base plate (1501), and a seat body (1503) elastically connected to the stud (1502). The bottom of the seat body (1503) is provided with a through hole (1504) for the stud (1502) to be inserted.

7. The pesticide rapid sampling device according to claim 6, characterized in that: The base (1503) has a groove (1505) with the same shape as the bottom of the test tube (3), and a spring (1506) is provided between the stud (1502) and the base (1503).

8. The pesticide rapid sampling device according to claim 5, characterized in that: The clamp (16) includes a connecting plate (1601) fixedly mounted on the upright plate (1), a left clamp (1602) fixedly mounted on the connecting plate (1601), and a right clamp (1603) rotatably connected to the left clamp (1602). A tension spring (1604) is provided between the left clamp (1602) and the right clamp (1603).

9. The pesticide rapid sampling device according to claim 8, characterized in that: The left clamp (1602) and the right clamp (1603) are respectively provided with arc-shaped plates (1605) similar to the side wall of the test tube (3).

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