Volatile substance simulation sampler

Abstract

The invention relates to the technical field of sampling equipment, and particularly discloses a volatile substance simulation sampler which comprises a sampling equipment box, a fixed partition plate is fixedly arranged in the middle of the interior of the sampling equipment box, and a sampling auxiliary assembly is arranged at the top of the fixed partition plate; the sampling auxiliary assembly is composed of a coil fixing frame and a heating frame, the coil fixing frame is fixedly arranged at the top of the fixed partition plate, the heating frame is fixedly arranged at the top of the coil fixing frame, and an experiment container is placed at the top of the heating frame. A dual heating mode of combining an infrared heating tube and a ceramic heating sleeve is adopted, the infrared heating tube heats the bottom of an experimental container, and the ceramic heating sleeve wraps the outside of the container in the full circumferential direction, so that the temperature rise rate of a reagent is increased, heat loss is effectively reduced, and it is ensured that the temperature of the reagent in the container is uniform and stable; the magnetic stirring function is matched, the stirring rotating speed can be flexibly adjusted according to the liquid phase viscosity of the reagent, the problems of local concentration layering and non-uniform temperature are avoided, and the reagent is mixed more uniformly.

Description

Technical Field

[0001] This invention relates to the field of sampling equipment technology, specifically to a volatile substance simulation sampler. Background Technology

[0002] In fields such as environmental monitoring, food testing, and disease prevention and control, accurate sampling of volatile organic compounds is a core prerequisite for subsequent testing and analysis, and the sampling effect directly determines the accuracy and reliability of the test data.

[0003] Currently available volatile substance sampling equipment suffers from several drawbacks. The heating methods are often limited, with most employing single-point bottom heating or simple ring heating. This results in slow reagent heating rates and uneven temperature distribution within the experimental container, leading to incomplete volatilization or excessive decomposition in certain areas, thus affecting the release efficiency of volatile substances. Furthermore, reagent injection in these sampling devices relies on manual operation, resulting in insufficient injection accuracy and a lack of effective sealing, leading to frequent gas leakage and loss of volatile substances during sampling. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a volatile substance simulation sampler to solve the aforementioned technical defects.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a volatile substance simulation sampler, comprising a sampling equipment box, wherein a fixed partition is fixedly installed in the middle of the sampling equipment box, and a sampling auxiliary component is installed on the top of the fixed partition; the sampling auxiliary component consists of a coil fixing frame and a heating frame, wherein the coil fixing frame is fixedly installed on the top of the fixed partition, and a heating frame is fixedly installed on the top of the coil fixing frame, and an experimental container is placed on the top of the heating frame; a stirring groove is installed in the middle of the bottom of the experimental container, and several magnetic stir bar pieces are installed inside the stirring groove; several aeration heads are also installed at the bottom of the experimental container, and a filter head is threadedly installed at one end of the air outlet of each aeration head; a connecting sealing seat is fixedly installed on one side of each aeration head, and one end of the connecting sealing seat extends to the outside of the experimental container; an air guide frame is fixedly installed on the top of the outer circumference of the experimental container, and several aeration conduits are installed at the bottom of the air guide frame, and the bottom ends of the several aeration conduits are respectively threadedly sealed to one end of each of the several connecting sealing seats.

[0006] Furthermore, the magnetic stir bar is made of a neodymium iron boron strong magnet wrapped in polytetrafluoroethylene.

[0007] Furthermore, several aeration heads are located at the bottom inside the experimental container, and the air outlets of several aeration heads are located on the side. Several aeration heads are distributed at equal angles about the central axis of the experimental container, and a distance of 5-10mm is left between the bottom of several aeration heads and the bottom of the inner wall of the experimental container.

[0008] Furthermore, an electromagnetic coil module is fixedly installed inside the coil mounting bracket, and the inside of the electromagnetic coil module is connected to a controller located outside the sampling equipment box via wires. The controller integrates a speed control chip.

[0009] Furthermore, an infrared heating tube is fixedly installed inside the heating rack, and the inside of the infrared heating tube is connected to the controller via a wire; a limiting groove is provided on the top of the heating rack, and a limiting rubber ring is fixedly installed inside the limiting groove, with the inner surface of the limiting rubber ring contacting the bottom of the outer surface of the experimental container; a temperature controller is also fixedly installed on one side of the front of the sampling equipment box, and the temperature controller is electrically connected to the inside of the infrared heating tube via a wire.

[0010] Furthermore, a control servo cylinder is fixedly installed on the top of the sampling equipment box, and the bottom end of the drive shaft of the control servo cylinder extends into the interior of the sampling equipment box. A sampling movable frame is fixedly installed at the bottom end of the drive shaft of the control servo cylinder, and a ceramic heating sleeve is fixedly installed at the bottom of the sampling movable frame.

[0011] Furthermore, the sampling frame is internally equipped with a nitrogen output port and a reagent injection port, one end of which extends to the bottom of the sampling frame. The other end of the nitrogen output port is connected to a spring-loaded nitrogen output tube, one end of which extends to the outside of the sampling equipment box. The other end of the reagent injection port is connected to a spring-loaded reagent conduit, one end of which also extends to the outside of the sampling equipment box. A sealing gasket is also fixedly installed at the bottom of the sampling frame, and the size of the sealing gasket matches the top of the experimental container.

[0012] Furthermore, a flow meter is fixedly installed at the bottom inside the sampling equipment box, and the inlet end of the flow meter is connected to a nitrogen delivery pipe, one end of which extends to the outside of the sampling equipment box; the outlet end of the flow meter is connected to a spring nitrogen input pipe, one end of which extends to the top of the fixed partition; a gas guide interface is fixedly installed at the bottom of the sampling movable frame, and the inside of the gas guide interface is connected to the top end of the spring nitrogen input pipe.

[0013] Furthermore, a reagent input tube is fixedly installed on one side of the sampling device box, and the top end of the reagent input tube is connected to one end of the spring reagent conduit; a pusher piston is slidably installed inside the reagent input tube, and a pusher servo cylinder is fixedly installed at the bottom of the reagent input tube, with the top end of the drive shaft of the pusher servo cylinder fixedly connected to the bottom of the pusher piston; a reagent conduit and a cleaning liquid conduit are fixedly installed on both sides of the bottom surface of the reagent input tube, and the interiors of the reagent conduit and the cleaning liquid conduit are connected to the interior of the reagent input tube.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows: 1. This invention employs a dual heating method combining an infrared heating tube and a ceramic heating jacket. The infrared heating tube specifically heats the bottom of the experimental container, while the ceramic heating jacket provides full circumferential coverage of the container. This accelerates the reagent heating rate and effectively reduces heat loss, ensuring a uniform and stable reagent temperature within the container. Combined with a magnetic stirring function, the stirring speed can be flexibly adjusted according to the viscosity of the reagent liquid phase, avoiding localized concentration stratification and temperature unevenness, resulting in more uniform reagent mixing. Simultaneously, the aeration heads feature an equiangularly distributed layout, with the outlets facing to the side and maintaining a reasonable distance from the bottom of the container. This cleverly avoids the rotation trajectory of the stirring components and disperses nitrogen gas into fine, uniform bubbles, significantly increasing the gas-liquid contact area. The synergistic effect of these three elements effectively promotes the conversion of volatile substances from the liquid phase to the gas phase, ensuring the sufficiency and stability of the sampling.

[0015] 2. In this invention, the reagent injection process uses a servo electric cylinder to drive the piston, allowing for precise control of the reagent injection volume according to experimental requirements. This replaces the traditional manual syringe injection method, avoiding measurement deviations caused by human operation. The gas path system employs a multi-seal structure, with sealing components installed at the connection between the container and the movable frame, and at the interface between the gas inlet and the gas guide frame, ensuring the airtightness of the gas path and preventing leakage of volatile substances and nitrogen loss. Simultaneously, a flow meter is used to precisely regulate the nitrogen flow rate, making the aeration process stable and controllable. The entire sampling process, from reagent injection, heating and stirring, aeration sampling to equipment cleaning, is automated and interconnected through a controller, forming a complete closed loop. This reduces manual intervention, improving operational convenience and ensuring the repeatability and accuracy of experimental results.

[0016] 3. The sampling device of this invention integrates an automatic cleaning function. After the experiment, cleaning fluid can be injected into the pipeline through the cleaning fluid conduit. Driven by a servo cylinder, the cleaning fluid can thoroughly rinse the reagent delivery pipeline and interface, effectively avoiding cross-contamination between different reagents and ensuring the cleanliness of the equipment for subsequent use. Each functional module adopts a modular layout, and the components are mostly assembled through detachable connections, which facilitates later maintenance, repair, and component replacement. At the same time, the spring-loaded conduit design is adapted to the up-and-down movement of the movable frame, ensuring the stability and flexibility of the pipeline connection. The overall structure is compact and reasonable, and the functional areas are clearly defined, which not only reduces the maintenance cost of the equipment, but also adapts to the sampling needs of different types and viscosities of reagents, greatly improving the applicability and service life of the equipment. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a volatile substance simulation sampler according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sampling device box according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the ceramic heating jacket and sampling frame structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the experimental container and ceramic heating jacket structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the experimental container and sampling frame structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the sampling rack and reagent input tube structure according to an embodiment of the present invention.

[0018] In the diagram, 1. Sampling equipment box; 2. Fixed partition; 3. Coil fixing frame; 4. Electromagnetic coil module; 5. Heating frame; 6. Infrared heating tube; 7. Experimental container; 8. Limiting rubber ring; 9. Ceramic heating jacket; 10. Sampling movable frame; 11. Control servo cylinder; 12. Stirring groove; 13. Magnetic stir bar; 14. Aeration head; 15. Filter head; 16. Connecting sealing seat; 17. Aeration conduit; 18. Air guide frame; 19. Temperature controller; 20. Sealing gasket; 21. Nitrogen output interface; 22. Reagent injection interface; 23. Spring nitrogen output pipe; 24. Spring reagent conduit; 25. Reagent input pipe; 26. Push piston; 27. Push servo cylinder; 28. Reagent conduit; 29. ​​Cleaning fluid conduit; 30. Nitrogen delivery pipe; 31. Flow meter; 32. Spring nitrogen input pipe; 33. Air guide interface. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention. Example 1

[0021] Please see Figures 1 to 6 As shown, a volatile substance simulation sampler includes a sampling equipment box 1. A fixed partition 2 is fixedly installed in the middle of the sampling equipment box 1, and a sampling auxiliary component is installed on the top of the fixed partition 2. The sampling auxiliary component consists of a coil fixing frame 3 and a heating frame 5. The coil fixing frame 3 is fixedly installed on the top of the fixed partition 2, and the heating frame 5 is fixedly installed on the top of the coil fixing frame 3. An experimental container 7 is placed on the top of the heating frame 5.

[0022] Specifically, a touch screen and a power button are located on the lower front of the sampling equipment box 1, and a controller is installed inside the touch screen.

[0023] Furthermore, a stirring groove 12 is provided in the middle of the bottom of the experimental container 7, and several magnetic stir bar 13 are provided inside the stirring groove 12; wherein, the magnetic stir bar 13 is a neodymium iron boron strong magnet wrapped with polytetrafluoroethylene; several aeration heads 14 are also provided at the bottom of the experimental container 7, and a filter head 15 is threadedly provided at one end of the air outlet of each aeration head 14; a connecting sealing seat 16 is fixedly provided on one side of the aeration head 14, and one end of the connecting sealing seat 16 extends to the outside of the experimental container 7; an air guide frame 18 is fixedly provided at the top of the outer circumference of the experimental container 7, and several aeration conduits 17 are provided at the bottom of the air guide frame 18; the bottom ends of the several aeration conduits 17 are respectively threadedly sealed to one end of the several connecting sealing seats 16.

[0024] Nitrogen gas is introduced into several aeration conduits 17 through the air guide frame 18. The nitrogen gas is then introduced into several aeration heads 14 through the aeration conduits 17 in conjunction with the sealing seat 16. Finally, the nitrogen gas is sprayed into the experimental container 7 through the filter head 15 at one end of the several aeration heads 14 inside the experimental container 7. The aeration is controlled by several aeration heads 14 located at the bottom inside the experimental container 7. The outlets of the several aeration heads 14 are located on the side. The several aeration heads 14 are distributed at equal angles about the central axis of the experimental container 7. A distance of 5-10 mm is left between the bottom of the several aeration heads 14 and the bottom of the inner wall of the experimental container 7 to prevent the magnetic stir bar 13 from colliding with the aeration heads 14 and causing displacement or damage.

[0025] Furthermore, an electromagnetic coil module 4 is fixedly installed inside the coil fixing frame 3, and the interior of the electromagnetic coil module 4 is connected to a controller located outside the sampling equipment box 1 via wires. The controller integrates a speed control chip. The electromagnetic coil module 4 drives several magnetic stir bar 13 inside the experimental container 7 to rotate inside the stirring groove 12, thereby magnetically stirring the reagent inside the experimental container 7. The speed of the magnetic stir bar 13 can be flexibly adjusted according to the viscosity of the liquid phase to avoid insufficient stirring due to too low a speed or liquid splashing due to too high a speed.

[0026] Furthermore, an infrared heating tube 6 is fixedly installed inside the heating frame 5, and the interior of the infrared heating tube 6 is connected to the controller via a wire. A limiting groove is provided on the top of the heating frame 5, and a limiting rubber ring 8 is fixedly installed inside the limiting groove. The inner surface of the limiting rubber ring 8 contacts the bottom of the outer surface of the experimental container 7. A temperature controller 19 is fixedly installed on one side of the front of the sampling equipment box 1, and the temperature controller 19 is electrically connected to the interior of the infrared heating tube 6 via a wire. It should be noted that during the simulated sampling of volatile substances, the bottom of the experimental container 7 is heated by the infrared heating tube 6 inside the heating frame 5. This, combined with several aeration heads 14 inside the experimental container 7 aerating the reagent, and several magnetic stir bar 13 magnetically stirring the reagent, significantly improves the sampling efficiency of volatile substances.

[0027] In summary, the structural design of the sampling equipment box 1 provides stable support for the overall equipment. The internal fixed partition 2 effectively divides the space, providing a reliable foundation for the installation of sampling auxiliary components and ensuring the orderly arrangement of various functional modules. The coil fixing frame 3 securely fixes the electromagnetic coil module 4, enabling it to precisely drive the magnetic stir bar 13 in the stirring groove 12 inside the experimental container 7 to rotate. The neodymium iron boron strong magnet material wrapped in polytetrafluoroethylene is suitable for organic experimental systems, and the rotation speed can be flexibly adjusted according to the liquid phase viscosity through the speed control chip of the controller. This avoids insufficient stirring due to excessively low speed and prevents liquid splashing caused by excessively high speed, ensuring uniform reagent mixing. The infrared heating tube 6 inside the heating rack 5 can specifically heat the bottom of the experimental container 7. The limiting rubber ring 8 in the top limiting groove tightly fits the bottom of the outer surface of the experimental container 7, effectively fixing the experimental container 7 and preventing it from shifting during heating and stirring, ensuring heating stability. Several aeration heads 14 at the bottom inside the experimental container 7 are centered. With the axes evenly distributed and the air outlets located on the side with a 5-10mm gap between the bottom and the bottom of the container's inner wall, the design cleverly avoids the rotation trajectory of the magnetic stir bar 13, preventing displacement or damage due to collisions, while also achieving uniform aeration below the reagents. Combined with the nitrogen distribution effect of the air guide frame 18, nitrogen is stably delivered to each aeration head 14 through several aeration conduits 17 and connecting sealing seats 16. The filter head 15 at one end of the aeration head 14 intercepts impurities, preventing pore blockage. Simultaneously, the threaded seal connection between the connecting sealing seat 16 and the aeration conduit 17 ensures gas path sealing, preventing nitrogen leakage. The heating function of the infrared heating tube 6, the uniform aeration function of the aeration head 14, and the stirring function of the magnetic stir bar 13 work together to effectively promote the conversion of volatile substances from the liquid phase to the gas phase, improving sampling efficiency. Furthermore, many components are designed to be detachable and have threaded connections, facilitating later maintenance and replacement. The overall structure is compact, with clear functional zoning, adaptable to the sampling needs of volatile substances in different experimental scenarios. Example 2

[0028] Specifically, a control servo cylinder 11 is fixedly installed on the top of the sampling equipment box 1, and the bottom end of the drive shaft of the control servo cylinder 11 extends into the interior of the sampling equipment box 1. A sampling movable frame 10 is fixedly installed at the bottom end of the drive shaft of the control servo cylinder 11, and a ceramic heating sleeve 9 is fixedly installed at the bottom of the sampling movable frame 10. The top of the heating frame 5 is provided with a connecting groove that matches the bottom of the ceramic heating sleeve 9. The driving end of the control servo cylinder 11 controls the sampling movable frame 10 to move downward until the bottom of the ceramic heating sleeve 9 matches the connecting groove on the top of the heating frame 5. The ceramic heating sleeve 9 is used to cover the outside of the experimental container 7. When sampling volatile substances, the ceramic heating sleeve 9, in conjunction with the infrared heating tube 6 inside the heating frame 5, simultaneously heats the reagent inside the experimental container 7, increasing the heating rate of the reagent inside the experimental container 7, while reducing heat loss.

[0029] Furthermore, a nitrogen output interface 21 and a reagent injection interface 22 are fixedly installed inside the sampling mobile frame 10. One end of the nitrogen output interface 21 and the reagent injection interface 22 extends to the bottom of the sampling mobile frame 10. The other end of the nitrogen output interface 21 is connected to a spring nitrogen output tube 23, one end of which extends to the outside of the sampling equipment box 1. The other end of the reagent injection interface 22 is connected to a spring reagent conduit 24, one end of which extends to the outside of the sampling equipment box 1. A sealing gasket 20 is also fixedly installed at the bottom of the sampling mobile frame 10. The size of the sealing gasket 20 matches the top of the experimental container 7. When the sampling mobile frame 10 moves downward and contacts the top of the experimental container 7, the sealing gasket 20 ensures the sealing of the connection between the experimental container 7 and the sampling mobile frame 10.

[0030] Furthermore, a flow meter 31 is fixedly installed at the bottom inside the sampling equipment box 1, and the inlet end of the flow meter 31 is connected to a nitrogen delivery pipe 30, one end of which extends to the outside of the sampling equipment box 1; the outlet end of the flow meter 31 is connected to a spring nitrogen input pipe 32, and one end of which extends to the top of the fixed partition 2; a gas guide interface 33 is fixedly installed at the bottom of the sampling movable frame 10, and the inside of the gas guide interface 33 is connected to the top of the spring nitrogen input pipe 32; a sealing connection groove is provided at the top of the gas guide frame 18, and the inside of the sealing connection groove is movably and sealingly connected to the bottom of the gas guide interface 33; when the sampling movable frame 10 is pushed down to connect with the top of the experimental container 7 by controlling the servo cylinder 11, the bottom of the gas guide interface 33 is connected to the inside of the sealing connection groove at the top of the gas guide frame 18.

[0031] Furthermore, a reagent input tube 25 is fixedly installed on one side of the sampling device box 1, and the top end of the reagent input tube 25 is connected to one end of the spring reagent conduit 24; a pusher piston 26 is slidably installed inside the reagent input tube 25, and a pusher servo cylinder 27 is fixedly installed at the bottom of the reagent input tube 25, and the top end of the drive shaft of the pusher servo cylinder 27 is fixedly connected to the bottom of the pusher piston 26; a reagent conduit 28 and a cleaning liquid conduit 29 are fixedly installed on both sides of the bottom surface of the reagent input tube 25, and the interiors of the reagent conduit 28 and the cleaning liquid conduit 29 are both connected to the interior of the reagent input tube 25.

[0032] It should be noted that the reagent is delivered into the reagent input tube 25 through the reagent conduit 28. When the reagent is delivered into the experimental container 7, the amount of reagent delivered is precisely controlled by controlling the stroke of the drive end of the pusher servo cylinder 27. When the sampling of volatile substances is completed, cleaning fluid is introduced into the reagent input tube 25 through the cleaning fluid conduit 29. The cleaning fluid is used to clean the inside of the spring reagent conduit 24 and the reagent injection interface 22 to avoid cross-contamination of different reagents inside the reagent input tube 25.

[0033] In summary, the control servo cylinder 11 at the top of the sampling equipment box 1 can precisely drive the sampling mobile frame 10 to move up and down, causing the ceramic heating sleeve 9 to engage with the connecting groove at the top of the heating frame 5, thus achieving external coverage of the experimental container 7. This forms a synergistic heating structure with the infrared heating tube 6 inside the heating frame 5, which helps to improve the heating rate of the reagents in the experimental container 7. At the same time, the covering effect of the ceramic heating sleeve 9 can reduce heat loss and ensure heating stability. Meanwhile, the sealing gasket 20 at the bottom of the sampling mobile frame 10 can effectively ensure the sealing of the connection between the two when it contacts the top of the experimental container 7, avoiding gas leakage that could affect the sampling effect. The nitrogen output interface 21 and reagent injection interface 22 integrated on the sampling frame 10 are externally connected through the spring nitrogen output tube 23 and the spring reagent conduit 24, respectively. The spring-made conduit can flexibly adapt to the movement of the sampling frame 10 without affecting the stability of the pipeline connection. The flow meter 31 inside the sampling equipment box 1 is connected to external nitrogen through the nitrogen delivery tube 30, and then connected to the gas guide interface 33 through the spring nitrogen input tube 32. The gas guide interface 33 is in a movable sealing fit with the sealing connection groove on the top of the gas guide frame 18 to form a complete and well-sealed nitrogen delivery path, ensuring that nitrogen is stably delivered into the experimental container 7 at the set flow rate. The reagent input tube 25 is equipped with a pusher servo cylinder 27 and a pusher piston 26. By controlling the stroke of the drive shaft of the pusher servo cylinder 27, the amount of reagent fed can be precisely controlled. The reagent conduit 28 provides a channel for reagent input, and the cleaning solution conduit 29 can introduce cleaning solution into the reagent input tube 25 to clean the spring reagent conduit 24 and the reagent injection interface 22, effectively avoiding cross-contamination between different reagents and ensuring the accuracy of subsequent experiments. In the overall structure, the elastic design of the spring nitrogen output tube 23, the spring reagent conduit 24, and the spring nitrogen input tube 32 adapts to the movement requirements of the sampling frame 10. The sealing fit of each interface and the integrated design of the components not only make the equipment structure more compact, but also realize the integrated control of heating, gas delivery, reagent injection and cleaning, improving the ease of operation and the stability and accuracy of the sampling process. Example 3

[0034] Specifically, this embodiment discloses the working principle of the volatile substance simulation sampler, including the following steps: First, the experimental container 7 is placed in the limiting groove at the top of the heating rack 5. The limiting rubber ring 8 secures the experimental container 7 by elastic compression, preventing displacement during subsequent operations. The control servo cylinder 11 is activated, and its drive shaft moves the sampling movable frame 10 downwards until the bottom of the ceramic heating sleeve 9 precisely engages with the connecting groove at the top of the heating rack 5, achieving full circumferential coverage of the experimental container 7. Simultaneously, the sealing gasket 20 at the bottom of the sampling movable frame 10 fits tightly against the top of the experimental container 7, ensuring a sealed environment inside the container. During this process, the gas guide port 33 at the bottom of the sampling movable frame 10 is simultaneously inserted into the sealing connection groove at the top of the gas guide frame 18, completing the sealed connection of the nitrogen delivery channel and laying the foundation for subsequent gas transmission.

[0035] The reagent sample to be tested is delivered to the reagent input tube 25 through the reagent conduit 28. The controller sets the reagent injection volume according to the experimental requirements, and then starts the pusher servo cylinder 27. Its drive shaft pushes the pusher piston 26 to slide upward along the reagent input tube 25. The piston thrust is used to deliver the precisely metered reagent through the spring reagent conduit 24 to the reagent injection interface 22, and finally injects it into the experimental container 7, thus realizing quantitative control of reagent injection.

[0036] After the reagent injection is completed, all functional modules start working synchronously and collaboratively: The controller activates the infrared heating tube 6 and ceramic heating jacket 9 inside the heating rack 5. The infrared heating tube 6 specifically heats the bottom of the experimental container 7, and the ceramic heating jacket 9 covers the outside of the container to reduce heat loss. The two work together to increase the reagent heating rate and keep the reagent at the set constant temperature, providing stable temperature conditions for the volatilization of organic substances. The controller adjusts the magnetic field strength and frequency of the electromagnetic coil module 4 through the speed control chip. The alternating magnetic field generated by the electromagnetic coil module 4 drives the magnetic stir bar 13 in the stirring groove 12 inside the experimental container 7 to rotate. The speed is flexibly adjusted according to the viscosity of the reagent liquid phase to ensure uniform mixing of the reagent and avoid local concentration stratification or uneven temperature. External nitrogen enters the flow meter 31 through the nitrogen delivery pipe 30. After the flow meter 31 accurately controls the nitrogen flow rate, it is sent to the gas guide frame 18 through the spring nitrogen input pipe 32 and the gas guide interface 33. The gas guide frame 18 evenly distributes the nitrogen to several aeration pipes 17, and then delivers it to the aeration head 14 in the experimental container 7 through the connecting sealing seat 16. The nitrogen is sprayed out through the air outlet on the side of the aeration head 14. The filter head 15 intercepts impurities in the reagent to avoid pore blockage. The aeration heads 14 are distributed at equal angles with respect to the central axis of the container and avoid the rotation trajectory of the magnetic stir bar 13, so that the nitrogen bubbles are evenly dispersed in the reagent. Combined with the stirring action, the gas-liquid contact area is increased, and the conversion of volatile organic substances from the liquid phase to the gas phase is accelerated.

[0037] The mixed gas formed by the volatilization of organic matter in the experimental container 7 enters the spring nitrogen output tube 23 through the nitrogen output port 21 under the action of gas pressure, and is then transported to the gas chromatograph outside the sampler to complete the sampling and transmission of volatile organic substances, providing sample gas for subsequent detection and analysis.

[0038] After a single sampling is completed, in order to avoid cross-contamination between different reagents, the controller starts the cleaning process: cleaning fluid is injected into the reagent input tube 25 through the cleaning fluid conduit 29, and the pusher servo cylinder 27 drives the pusher piston 26 to reciprocate, pushing the cleaning fluid to flow through the spring reagent conduit 24 and the reagent injection interface 22 in sequence, rinsing the reagents remaining in the pipeline and interface. The cleaning waste liquid is finally disposed of together with the residual liquid after the experiment to ensure the cleanliness of the equipment for subsequent use.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the 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 the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A volatile substance simulation sampler, comprising a sampling equipment box (1), wherein a fixed partition (2) is fixedly disposed in the middle of the sampling equipment box (1), and a sampling auxiliary component is disposed on the top of the fixed partition (2); characterized in that: The sampling auxiliary component consists of a coil holder (3) and a heating frame (5). The coil holder (3) is fixedly installed on the top of the fixed partition (2). The heating frame (5) is fixedly installed on the top of the coil holder (3). An experimental container (7) is placed on the top of the heating frame (5). A stirring groove (12) is provided in the middle of the bottom of the experimental container (7). Several magnetic stir bar (13) is provided inside the stirring groove (12). Several aeration heads (14) are also provided at the bottom of the experimental container (7). Furthermore, a filter head (15) is threaded onto one end of the air outlet of each of the aeration heads (14). A connecting sealing seat (16) is fixedly provided on one side of the aeration head (14), and one end of the connecting sealing seat (16) extends to the outside of the experimental container (7). An air guide frame (18) is fixedly provided on the top of the outer circumference of the experimental container (7), and a number of aeration conduits (17) are provided at the bottom of the air guide frame (18). The bottom ends of the aeration conduits (17) are respectively threaded and sealed to one end of the connecting sealing seats (16).

2. The volatile substance simulation sampler according to claim 1, characterized in that: The magnetic stir bar (13) is made of a neodymium iron boron magnet wrapped in polytetrafluoroethylene.

3. The volatile substance simulation sampler according to claim 1, characterized in that: Several aeration heads (14) are located at the bottom inside the experimental container (7), and the air outlets of several aeration heads (14) are located on the side. Several aeration heads (14) are distributed at equal angles about the central axis of the experimental container (7), and there is a distance of 5-10 mm between the bottom of several aeration heads (14) and the bottom of the inner wall of the experimental container (7).

4. The volatile substance simulation sampler according to claim 1, characterized in that: The coil mounting bracket (3) is equipped with an electromagnetic coil module (4), and the inside of the electromagnetic coil module (4) is connected to a controller located outside the sampling equipment box (1) via a wire. The controller integrates a speed control chip.

5. The volatile substance simulation sampler according to claim 1, characterized in that: The heating rack (5) is also fixedly equipped with an infrared heating tube (6), and the interior of the infrared heating tube (6) is connected to the controller through a wire; the top of the heating rack (5) is provided with a limiting groove, and the interior of the limiting groove is also fixedly equipped with a limiting rubber ring (8), and the inner surface of the limiting rubber ring (8) is in contact with the bottom of the outer surface of the experimental container (7); a temperature controller (19) is also fixedly equipped on one side of the front of the sampling equipment box (1), and the temperature controller (19) is electrically connected to the interior of the infrared heating tube (6) through a wire.

6. The volatile substance simulation sampler according to claim 1, characterized in that: The top of the sampling equipment box (1) is fixedly provided with a control servo cylinder (11), and the bottom end of the drive shaft of the control servo cylinder (11) extends into the interior of the sampling equipment box (1). The bottom end of the drive shaft of the control servo cylinder (11) is fixedly provided with a sampling movable frame (10), and the bottom of the sampling movable frame (10) is fixedly provided with a ceramic heating sleeve (9).

7. The volatile substance simulation sampler according to claim 6, characterized in that: The sampling frame (10) is fixedly equipped with a nitrogen output port (21) and a reagent injection port (22). One end of the nitrogen output port (21) and the reagent injection port (22) extends to the bottom of the sampling frame (10). The other end of the nitrogen output port (21) is connected to a spring nitrogen output tube (23). One end of the spring nitrogen output tube (23) extends to the outside of the sampling equipment box (1). The other end of the reagent injection port (22) is connected to a spring reagent conduit (24). One end of the spring reagent conduit (24) extends to the outside of the sampling equipment box (1). A sealing gasket (20) is also fixedly installed at the bottom of the sampling frame (10). The size of the sealing gasket (20) matches the top of the experimental container (7).

8. The volatile substance simulation sampler according to claim 6, characterized in that: A flow meter (31) is fixedly installed at the bottom inside the sampling equipment box (1), and the inlet end of the flow meter (31) is connected to a nitrogen delivery pipe (30), one end of which extends to the outside of the sampling equipment box (1); the outlet end of the flow meter (31) is connected to a spring nitrogen input pipe (32), and one end of which extends to the top of the fixed partition (2); a gas guide interface (33) is fixedly installed at the bottom of the sampling mobile frame (10), and the inside of the gas guide interface (33) is connected to the top of the spring nitrogen input pipe (32).

9. The volatile substance simulation sampler according to claim 7, characterized in that: A reagent input tube (25) is fixedly installed on one side of the sampling equipment box (1), and the top end of the reagent input tube (25) is connected to one end of the spring reagent conduit (24); a pusher piston (26) is slidably installed inside the reagent input tube (25), and a pusher servo cylinder (27) is fixedly installed at the bottom of the reagent input tube (25), and the top end of the drive shaft of the pusher servo cylinder (27) is fixedly connected to the bottom of the pusher piston (26); a reagent conduit (28) and a cleaning liquid conduit (29) are fixedly installed on both sides of the bottom surface of the reagent input tube (25), and the interiors of the reagent conduit (28) and the cleaning liquid conduit (29) are connected to the interior of the reagent input tube (25).

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