Anti-gas-escape sampling device for pesticide analysis
By designing a sampling device for pesticide analysis that prevents gas leakage, the problems of pesticide residue in the sampling tube and unsealed container opening were solved, achieving pesticide sealing and uniform sampling, and improving the accuracy of detection and the applicability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional sampling devices leave pesticide residues on the surface of the sampling tube after sampling, and the pesticide container opening is not completely sealed during the sampling process, causing pesticide volatilization, which affects the environment and health. At the same time, pesticides may separate into layers when left for a long time, affecting the accuracy of the test.
A device comprising a sampling hood, a cylinder, a sealing plug, and a sampling tube was designed. Residual pesticides are scraped off through the channel where the sealing plug and the sampling tube cooperate, and the container opening is sealed by the frustum-shaped sealing plug. A driving device moves the sampling tube to different liquid levels for uniform sampling.
It effectively prevents pesticide volatilization, improves sampling accuracy and the applicability of the device, and ensures the accuracy of test results and ease of operation.
Smart Images
Figure CN224122217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pesticide sampling devices, specifically a pesticide analysis sampling device that prevents gas escape. Background Technology
[0002] Pesticides are chemically synthesized substances or mixtures of substances derived from biological or other natural materials, used to prevent and control diseases, insects, weeds, rodents, and other harmful organisms that threaten agriculture and forestry, as well as to purposefully regulate the growth of plants and pests. They are widely used in agricultural, forestry, and animal husbandry production, environmental and household sanitation for pest control and disease prevention, and industrial products for mold and insect prevention.
[0003] Sampling is a crucial step in pesticide analysis and testing. Sampling devices face many technical challenges. To prevent cross-contamination between different types of pesticides during sampling, the device must be easy to disassemble, clean, and maintain. To ensure the accuracy of analytical results, the device needs to improve sampling precision. To prevent pesticide volatilization and leakage, the device needs to have good sealing performance.
[0004] Traditional sampling devices have two main problems in preventing pesticide evaporation: First, after sampling, pesticide residue remains on the surface of the sampling tube after it is withdrawn from the pesticide container. Second, the pesticide container opening is left open and not properly sealed during sampling. These two problems cause pesticides to evaporate into the air, polluting the environment and affecting the health of workers.
[0005] Furthermore, pesticides may stratify within the container during prolonged storage, resulting in varying concentrations at different liquid levels. Therefore, to improve the accuracy of pesticide analysis and detection, it is necessary to sample the same dosage of pesticide at different liquid levels to ensure consistency and representativeness of the samples, and then mix them before analysis and detection. Utility Model Content
[0006] The purpose of this invention is to provide a pesticide analysis sampling device that prevents gas leakage, so as to solve the technical problem of residual pesticide adhering to the surface of the sampling tube after sampling, as mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A sampling device for pesticide analysis that prevents gas escape includes a sampling hood, a cylinder, a sealing plug, and a sampling tube;
[0009] The sampling hood is provided with a sealing plug at one end, and the cylinder and the sampling tube are provided inside the sampling hood. The sampling tube is provided at one end of the cylinder and communicates with the inside of the cylinder.
[0010] The other end of the sampling tube passes through the holes opened on the sampling cover and the sealing plug in sequence, and the diameter of the holes is equal to the outer diameter of the sampling tube.
[0011] A piston is slidably disposed inside the cylinder, and a pull rod is disposed on the side of the piston away from the sampling tube, with the other end of the pull rod extending out of the sampling cover;
[0012] Two drive devices are symmetrically arranged on the side wall of the sampling hood, which drive the cylinder to move along the axial direction of the sampling hood.
[0013] More preferably, the driving device includes a rack, which is disposed on the side wall of the cylinder along the axial direction of the cylinder. The rack meshes with a gear, which is fixedly mounted on a gear shaft. Both ends of the gear shaft extend out of the sampling cover and are connected to the knob.
[0014] More preferably, the sampling cover is provided with a locking pin, the locking pin is arranged parallel to the gear shaft, and the end face of the gear is evenly provided with a plurality of limiting holes along its circumference, and the working end of the locking pin can be inserted into the limiting holes.
[0015] More preferably, the other end of the sampling tube is connected to a conical sampling head.
[0016] More preferably, the sampling head has multiple sampling holes on its side wall, and a filter screen is connected to the bottom of the sampling head, with filter cotton provided on the filter screen.
[0017] More preferably, a sealing ring is provided between the sampling tube and the sampling head.
[0018] More preferably, the cylinder has a graduated strip on its side wall, and the sampling cover has an observation port that matches the graduated strip.
[0019] More preferably, the end of the pull rod away from the piston is provided with a handle.
[0020] More preferably, the sealing plug is frustum-shaped, with its large end face connected to the sampling cover and its small end connected to the pesticide container opening.
[0021] More preferably, the sealing plug is made of rubber material.
[0022] Compared with the prior art, the beneficial effects of this utility model are:
[0023] First, this utility model has a channel on the sealing plug that matches the sampling tube, and the diameter of the channel is consistent with the outer diameter of the sampling tube. After sampling is completed, the driving device drives the sampling tube to be pulled out of the pesticide container, so that the sealing plug and the channel work together to scrape off the residual pesticides attached to the surface of the sampling tube.
[0024] Secondly, this invention solves the technical problem of pesticide evaporation into the air caused by leaving the pesticide container open during sampling by using a frustum-shaped sealing plug with its small end press-fitted to the pesticide container opening. Furthermore, the frustum-shaped sealing plug can be adapted to pesticide containers of different sizes, thus expanding the application range of the device.
[0025] Furthermore, this invention uses a driving device to simultaneously extend and retract the sampling tube, facilitating control of the sampling head to move to different liquid levels in the pesticide solution, thereby extracting pesticides from different liquid levels and achieving uniform sampling of pesticide concentrations. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention during sampling;
[0028] Figure 3 This is a schematic diagram of the drive device of this utility model;
[0029] Figure 4 This is a schematic diagram of the sampling head of this utility model;
[0030] In the diagram: 1. Sampling hood; 2. Cylinder; 3. Sealing plug; 4. Piston; 5. Pull rod; 6. Sampling tube; 7. Sampling head; 8. Handle; 10. Rack; 11. Gear; 12. Knob; 13. Gear shaft; 14. Scale bar; 20. Filter screen; 21. Sealing ring; 22. Sampling hole. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, 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. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installation" and "connection" 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 direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0033] Example 1: As Figure 1 and Figure 2 As shown, this embodiment provides a sampling device for pesticide analysis that prevents gas escape, including a sampling hood 1, a cylinder 2, a sealing plug 3, and a sampling tube 6; one end of the sampling hood 1 is provided with a sealing plug 3, and the cylinder 2 and the sampling tube 6 are provided inside the sampling hood 1. One end of the cylinder 2 is provided with the sampling tube 6, which communicates with the inside of the cylinder 2; the other end of the sampling tube 6 passes through a channel opened on the sampling hood 1 and the sealing plug 3 in sequence, and the diameter of the channel is equal to the outer diameter of the sampling tube 6; a piston 4 is slidably arranged inside the cylinder 2, and a pull rod 5 is provided on the side of the piston 4 away from the sampling tube 6, with the other end of the pull rod 5 extending out of the sampling hood 1; two driving devices are symmetrically arranged on the side wall of the sampling hood 1 to drive the cylinder 2 to move along the axial direction of the sampling hood 1.
[0034] The sampling hood 1 is the main structure of the entire device. Specifically, it can be a hollow cylindrical or cubic structure, made of stainless steel or corrosion-resistant material. A sealing plug 3 is installed at one end of the sampling hood 1 to mate with the pesticide container opening. A cylinder 2 is located inside the sampling hood 1, with one end connected to the sampling tube 6 and the other end closed. The inside of the cylinder 2 is used to hold the pesticide to be sampled, and the extraction and discharge of the pesticide are achieved by the sliding of the piston 4. One end of the sampling tube 6 is connected to the inside of the cylinder 2, and the other end passes through the channels opened in the sampling hood 1 and the sealing plug 3, extending into the pesticide container. The sampling tube 6 must be made of corrosion-resistant, high-strength material to ensure its long-term stability and reliability. The piston 4 is slidably located inside the cylinder 2, used to extract or discharge the pesticide by its movement. A pull rod 5 is located on the side of the piston 4 away from the sampling tube 6, with the other end of the pull rod 5 extending out of the sampling hood 1, allowing the operator to pull or push the piston 4. Two drive devices are symmetrically arranged on the side wall of the sampling hood 1. The drive devices ensure the stability of the cylinder 2 inside the sampling hood 1, and at the same time drive the cylinder 2 together with the sampling tube 6 and the pull rod 5 to move along the axial direction of the sampling hood 1.
[0035] Before use, ensure the device is clean and free of pesticide and moisture residue. Open the pesticide container cap and tightly install the sealing plug 3 at the container opening. Then, use the drive device to move the cylinder 2 downwards, simultaneously lowering the sampling tube 6 into the pesticide container until its open end reaches the desired pesticide level. Next, pull the lever 5 upwards to create negative pressure inside the cylinder 2, drawing pesticide into it. Once a sufficient amount of pesticide has been drawn, stop pulling the lever 5. Finally, use the drive device to move the cylinder 2 upwards, extracting the sampling tube 6 from the pesticide container. Remove the container and seal it. After moving the sampling device to a safe area, push the lever 5 to move the piston 4 closer to the sampling tube 6, discharging the pesticide from the cylinder 2 into the designated container. After discharging, clean the sampling device for future use.
[0036] Example 2: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, based on Embodiment 1, this embodiment provides a sampling device for pesticide analysis that prevents gas escape. The driving device includes a rack 10, which is axially mounted on the side wall of the cylinder 2. The rack 10 meshes with a gear 11, which is fixedly mounted on a gear shaft 13. Both ends of the gear shaft 13 extend out of the sampling cover 1 and are connected to knobs 12. Specifically, the operator rotates the knob 12, which drives the gear 11 to rotate via the gear shaft 13. The rotation of the gear 11 drives the rack 10 to move up and down, thereby simultaneously moving the cylinder 2 up and down.
[0037] The sampling cover 1 is equipped with a locking pin, which is parallel to the gear shaft 13. Multiple limiting holes are evenly distributed around the end face of the gear 11, allowing the working end of the locking pin to be inserted into these holes. To lock, one end of the locking pin on the outside of the sampling cover 1 is pushed forward, so that the other end of the locking pin is inserted into one of the limiting holes of the gear 11, thereby locking the drive device and preventing the cylinder 2 and sampling tube 6 from moving up and down. To unlock, one end of the locking pin on the outside of the sampling cover 1 is pulled backward, so that the other end of the locking pin is removed from the gear 11, unlocking the drive device and allowing the cylinder 2 and sampling tube 6 to move up and down via the drive device.
[0038] The other end of the sampling tube 6 is connected to a conical sampling head 7. Multiple sampling holes 22 are provided on the side wall of the sampling head 7, and a filter screen 20 is connected to the bottom of the sampling head 7, with filter cotton provided on the filter screen 20. A sealing ring 21 is provided between the sampling tube 6 and the sampling head 7.
[0039] A conical sampling head 7 is movably connected to the end of the sampling tube 6 away from the cylinder 2. The sampling head 7 allows the sampling tube 6 to be easily inserted into the pesticide container, and the sampling amount can be precisely controlled by adjusting the sampling flow rate. Multiple sampling holes 22 are provided on the side wall of the sampling head 7, which are used for the pesticide to flow into the sampling tube 6.
[0040] A filter screen 20 is movably connected to the bottom of the sampling head 7. The filter screen 20 has filter holes and filter cotton is attached to it. The filter screen 20 and filter cotton can filter out impurities in pesticides, preventing impurities from entering the sampling device and causing pipe blockage, and ensuring the purity of the sample. A sealing ring 21 is provided between the sampling tube 6 and the sampling head 7. The sealing ring 21 can prevent pesticides from leaking from the gap between the sampling tube 6 and the sampling head 7, improving the sealing performance of the sampling device.
[0041] A scale bar 14 is provided on the side wall of the cylinder 2, and an observation port that cooperates with the scale bar 14 is provided on the sampling cover 1. The scale bar 14 is used to display the amount of pesticide in the cylinder 2 and the movement position of the piston 4. The observation port allows the operator to observe the scale bar 14 and thus understand the amount of pesticide in the cylinder 2 and the movement position of the piston 4.
[0042] A handle 8 is provided at the end of the lever 5 away from the piston 4. The handle 8 can increase the contact area between the operator's hand and the lever 5, and improve the comfort of operation.
[0043] The sealing plug 3 is frustoconical in shape. The larger end of the sealing plug 3 connects to the sampling cover 1, and the smaller end connects to the pesticide container opening. The frustoconical shape of the sealing plug 3 facilitates an interference fit with the pesticide container opening, solving the technical problem of sealing the pesticide container opening during sampling. It also easily adapts to container openings of different sizes, increasing the application range of the device. The sealing plug 3 is made of rubber, which has good elasticity and sealing properties, effectively preventing pesticide leakage and facilitating the insertion and exit of the sampling tube 6 through the channel.
[0044] The working principle and operation process of this utility model are as follows:
[0045] First, ensure the device is clean and free of pesticide and moisture residue. Open the pesticide container cap and tightly install the small end of the sealing plug 3 at the container opening. Then, the operator rotates knob 12 to move cylinder 2 axially along sampling hood 1, simultaneously driving sampling tube 6 downwards into the pesticide container, moving sampling head 7 to the pesticide level to be sampled, and pushing the locking pin forward to lock the drive device. Specifically, as shown... Figure 1 As shown, rotating the left knob 12 clockwise and the right knob 12 counterclockwise in sync causes the cylinder 2 to move downward along the axis of the sampling cover 1.
[0046] Next, the operator pulls the lever 5 upward by using the handle 8, causing the piston 4 to move away from the sampling tube 6 inside the cylinder 2, creating a negative pressure inside the cylinder 2, thereby drawing pesticide into the cylinder 2. Once a sufficient amount of pesticide has been drawn, the operator stops pulling the lever 5.
[0047] Finally, the operator pulls the locking pin backward to unlock the drive mechanism, as shown. Figure 2 As shown, rotating the left knob 12 counterclockwise and the right knob 12 clockwise simultaneously causes the cylinder 2 to move upward along the axis of the sampling cover 1, so that the sampling tube 6 is pulled out from the pesticide container. After removing the pesticide container and sealing it, the sampling device is transferred to a safe area. Then, by pushing the handle 8, the piston 4 is moved closer to the sampling tube 6, and the pesticide inside the cylinder 2 is discharged into the designated container. After discharge, the sampling device is cleaned for the next use.
[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.
[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A sampling device for pesticide analysis that prevents gas escape, characterized in that, It includes a sampling hood (1), a cylinder (2), a sealing plug (3), and a sampling tube (6); The sampling cover (1) is provided with a sealing plug (3) at one end. The sampling cover (1) is provided with a cylinder (2) and a sampling tube (6) inside. The sampling tube (6) is provided at one end of the cylinder (2) and is connected to the inside of the cylinder (2). The other end of the sampling tube (6) passes through the holes opened on the sampling cover (1) and the sealing plug (3) in sequence, and the diameter of the hole is equal to the outer diameter of the sampling tube (6). A piston (4) is slidably disposed inside the cylinder (2). A pull rod (5) is disposed on the side of the piston (4) away from the sampling tube (6). The other end of the pull rod (5) extends out of the sampling cover (1). Two drive devices are symmetrically arranged on the side wall of the sampling cover (1) to drive the cylinder (2) to move along the axial direction of the sampling cover (1).
2. The sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The drive device includes a rack (10), which is arranged on the side wall of the cylinder (2) along the axial direction of the cylinder (2). The rack (10) meshes with a gear (11), which is fixedly mounted on a gear shaft (13). Both ends of the gear shaft (13) extend out of the sampling cover (1) and are connected to the knob (12).
3. The sampling device for pesticide analysis with anti-escape gas protection according to claim 2, characterized in that, The sampling cover (1) is provided with a locking pin, which is arranged parallel to the gear shaft (13). The end face of the gear (11) is provided with a plurality of limiting holes evenly distributed along its circumference, and the working end of the locking pin can be inserted into the limiting hole.
4. The sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The other end of the sampling tube (6) is connected to a conical sampling head (7).
5. A sampling device for pesticide analysis with anti-escape gas protection according to claim 4, characterized in that, The sampling head (7) has multiple sampling holes (22) on its side wall, and a filter screen (20) is connected to the bottom of the sampling head (7). Filter cotton is provided on the filter screen (20).
6. A sampling device for pesticide analysis with anti-escape gas protection according to claim 4, characterized in that, A sealing ring (21) is provided between the sampling tube (6) and the sampling head (7).
7. A sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The cylinder (2) has a scale strip (14) on its side wall, and the sampling cover (1) has an observation port that matches the scale strip (14).
8. A sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The pull rod (5) is provided with a handle (8) at the end away from the piston (4).
9. A sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The sealing plug (3) is frustum-shaped. The large end face of the sealing plug (3) is connected to the sampling cover (1), and the small end of the sealing plug (3) is connected to the pesticide container opening.
10. A sampling device for pesticide analysis with anti-escape gas protection according to claim 1, characterized in that, The sealing plug (3) is made of rubber material.