A sampling cotton sealed storage device and a slit impact type bio-aerosol sampler

Abstract

The utility model relates to a kind of sampling cotton sealed storage device and slit impact type biological aerosol sampler, including sampler shell and sampler inner core, sampling cotton positioning groove is equipped on the sampler inner core, the sampler inner core is axially slidably installed in the sampler shell and with the sampler shell seal cooperation, the sampler inner core is axially slid along the sampler shell to the sampling cotton positioning groove is located in the sampler shell, or slide to the sampling cotton positioning groove is completely stretched from sampler shell front end. The utility model can realize the whole closed protection of sampling cotton before and after sampling, effectively prevent the inactivation or detection deviation of sample caused by pollution and moisture absorption, ensure the accuracy and repeatability of sampling result.

Description

Technical Field

[0001] This utility model relates to the field of bioaerosol sampling technology, and in particular to a sampling cotton sealing and preservation device and a slit impact bioaerosol sampler. Background Technology

[0002] Slit impactor samplers are widely used in bioaerosol detection due to their efficient particle fractionation collection capabilities. However, in existing sampling processes, the sampling cotton is easily contaminated by exposure to the environment, and the lack of effective sealing protection during transportation and storage increases the risk of cross-contamination or sample inactivation. Furthermore, the sampling cotton is prone to moisture absorption, significantly affecting the efficiency of subsequent microbial extraction and the accuracy of detection. Moreover, traditional packaging methods rely heavily on manual operation, resulting in uneven sealing, cumbersome procedures, and difficulty in meeting standardized sampling requirements. Therefore, there is an urgent need for a device with a simple structure, convenient operation, and the ability to achieve in-situ sealed preservation of the sampling cotton to improve sample stability and reliability during bioaerosol sampling. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a compact and reliable sealed sampling cotton preservation device and a slit impact bioaerosol sampler, which can realize the full-process sealed protection of the sampling cotton before and after sampling, effectively prevent sample inactivation or detection deviation caused by contamination and moisture absorption, and ensure the accuracy and repeatability of sampling results.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A sampling cotton sealing and preservation device includes a sampler shell and a sampler inner core. The sampler inner core is provided with a sampling cotton positioning groove. The sampler inner core is axially slidably installed in the sampler shell and sealed with the sampler shell. The sampler inner core slides axially along the sampler shell until the sampling cotton positioning groove is located in the sampler shell, or slides until the sampling cotton positioning groove extends completely from the front end of the sampler shell.

[0005] The beneficial effects of this invention are as follows: the sampler shell can effectively seal the sampling cotton positioned in the sampler core before and after sampling, preventing external environmental contamination of the sampling cotton; the sampling cotton positioning groove is used to accurately position the sampling cotton, ensuring the stability of the sampling cotton position during the sampling process, thereby ensuring that the sampling cotton can be accurately aligned with the sampling area or sealed inside the sampler shell; the axial sliding design of the sampler shell and the sampler core allows the sampling cotton on the sampler core to flexibly extend or retract from the inner cavity of the sampler shell, thereby ensuring that it can be fully extended and exposed to the airflow during sampling, and quickly retracted into the sampler shell after sampling, achieving in-situ sealing and effectively isolating external interference; in addition, the entire device has a compact structure, is easy to operate, requires no additional packaging steps, is applicable to various scenarios, and significantly improves the reliability of bioaerosol sample preservation and detection accuracy.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the sampler housing and the sampler inner core are fitted with a clearance, and sealing rings are provided on both the front and rear sides of the sampling cotton positioning groove. Each sealing ring is embedded in an annular groove on the outer wall of the sampler inner core, and each sealing ring achieves sealing by contacting the inner wall of the sampler housing.

[0008] The beneficial effects of adopting the above-mentioned further solutions are: the sealing ring is used to effectively seal the sampling cotton after sampling, preventing external contaminants from entering or internal samples from escaping, thereby improving the integrity of sample preservation and the accuracy of detection; the annular groove ensures stable installation of the sealing ring, avoiding displacement that could lead to sealing failure, and the clearance fit design ensures smooth sliding of the sampler's inner core without mutual wear, ensuring the reliability and sealing performance of the device for long-term use.

[0009] Furthermore, the front end of the sampler housing is provided with a front end cap for axial positioning of the sampler core, the front end cap being detachably connected to the sampler housing, and the rear inner wall of the sampler housing is provided with an end boss for axial positioning of the sampler core.

[0010] The beneficial effects of adopting the above-mentioned further solution are as follows: the front end cap and the end boss are used to fix the axial position between the sampler inner core and the sampler outer shell before and after sampling, respectively. This avoids the sampling cotton on the sampler inner core from accidentally sliding out from the front or rear end of the sampler outer shell due to vibration or external force during the transfer of the sampling cotton before or after sampling, thus preventing the sampling cotton from being exposed and causing contamination or loss. This ensures that the sampling cotton can always maintain a stable sealed state before or after sampling, effectively guaranteeing the integrity and cleanliness of the sample. The front end cap and the sampler outer shell are connected by a threaded connection or snap-fit, etc., which are detachable, facilitating the removal of samples before sampling. The lower front cover ensures that the sampler core can slide smoothly to the designated position where the sampling cotton enters the airflow channel. After sampling, the front cover is reinstalled to achieve a seal. The end boss axially positions the sampler core when it retracts to the limit position inside the outer shell by axially abutting against the sealing ring on the rear side of the sampling cotton positioning groove. This prevents excessive retraction that could cause the sealing ring to detach from the effective sealing area, or the sampling cotton to slide out from the rear end of the sampler shell due to external force, resulting in sample contamination or loss. This further improves the sealing reliability of the device and the safety of the sampling cotton storage, while preventing the intrusion of external airflow or contaminants, ensuring the accuracy of the test results.

[0011] Furthermore, the axial distance between the sealing rings on the front and rear sides of the sampling cotton positioning groove is less than the axial length of the sampler housing.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the axial distance between the sealing rings on both sides of the sampling cotton positioning groove is less than the axial dimension of the sampler shell, ensuring that when the sampler core slides into the sampler shell for sealing and preservation, the sealing rings on both sides of the sampling cotton positioning groove are simultaneously located inside the sampler shell, ensuring that the sampling cotton is located in the closed space formed by the sampler shell, the sampling cotton core, and the sealing rings on both sides, maintaining a clean environment throughout the entire preservation and transportation process.

[0013] Furthermore, all of the aforementioned sealing rings are made of wear-resistant material.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: the wear-resistant material not only has a long service life, but also greatly reduces the risk of decreased sealing performance due to wear, ensuring good airtightness even after multiple sliding operations.

[0015] Furthermore, the sampling cotton positioning groove is matched to the size of the sampling cotton, and the depth of the sampling cotton positioning groove is greater than the thickness of the sampling cotton.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the size of the sampling cotton positioning groove matches that of the sampling cotton, ensuring that the sampling cotton is installed firmly and in a precise position, avoiding loosening due to airflow impact, which would lead to a decrease in sampling efficiency or uneven sampling.

[0017] Furthermore, the rear end of the sampler core extends axially to form a handle, and the end of the handle is provided with a pull handle.

[0018] The beneficial effects of adopting the above-mentioned further solution are: the handle design makes it easy for the operator to push and pull the sampler core, allowing it to slide axially relative to the sampler shell, thereby achieving accurate entry and exit and positioning of the sampling cotton, ensuring convenient operation and precise action during the sampling process.

[0019] Furthermore, the outer wall of the handle is provided with an axial positioning boss for axially limiting the length of the sampler core extending out of the sampler housing.

[0020] The beneficial effects of adopting the above-mentioned further solution are: the axial positioning boss is used to limit the extreme position of the sampler core sliding forward, preventing it from extending too far and causing the sampling cotton to not be aligned with the sampling area, thus ensuring accurate and reliable sampling position.

[0021] Furthermore, the outer wall of the sampler housing is provided with an axial positioning boss II for axially positioning its installation position on the sampler.

[0022] The beneficial effects of adopting the above-mentioned further solution are: the second axial positioning boss is used to limit the axial position of the sampler housing on the sampler, thereby ensuring that after the sampler core inside the sampler housing extends out of the set length, the sampling cotton can be accurately aligned with the sampling area, ensuring the repeatability of the sampling process and the accuracy of the data, effectively avoiding sampling errors caused by installation deviations, and greatly improving the stability and reliability of the test results.

[0023] This utility model also provides a slit impact bioaerosol sampler, including a mounting hole and a sampling cotton sealing and preservation device installed in the mounting hole. The mounting hole is connected to the sampling area and extends to the other side of the sampling area.

[0024] The advantages of the above scheme are: the sampler uses high-speed airflow to impact the sampling cotton, so that the biosol in the airflow is hit and captured on the sampling cotton. At this time, the sampling cotton is located in the mounting hole and will not be in direct contact with the external environment. After sampling, the inner core of the sampler is pulled back first, so that the sampling cotton leaves the sampling area and is sealed in place in the sampler shell. Then, it is taken out as a whole from the mounting hole of the sampler, which effectively avoids cross-contamination. The structure is simple and the operation is convenient. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural diagram of a sampling cotton sealing and preservation device of the present invention, in which the sampling cotton is sealed inside the sampler shell before or after sampling. Figure 2 for Figure 1A magnified view of part A in the diagram; Figure 3 This is a cross-sectional structural diagram of the sampling cotton extending from the front end of the sampler shell during sampling in a sampling cotton sealing and preservation device of this utility model; Figure 4 This is a schematic cross-sectional view of the installation structure of the sampling cotton sealing and preservation device of this utility model with the slit impact bioaerosol sampler during sampling. Figure 5 This is a longitudinal cross-sectional schematic diagram of the installation structure of the sampling cotton sealing and preservation device of this utility model with the slit impact bioaerosol sampler during sampling.

[0026] The attached diagram lists the components represented by each number as follows: 1. Sampler housing; 2. Sampler inner core; 3. Sampling cotton positioning groove; 4. Front end cap; 5. End boss; 6. Sealing ring; 7. Annular groove; 8. Handle; 9. Pull handle; 10. Sampling cotton; 11. Sampler; 12. Axial positioning boss one; 13. Axial positioning boss two; 14. Mounting hole. Detailed Implementation

[0027] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1 like Figure 1 and Figure 3 As shown, this embodiment provides a sampling cotton sealing and preservation device, including a sampler housing 1 and a sampler inner core 2. The sampler inner core 2 is provided with a sampling cotton positioning groove 3. The sampler inner core 2 is axially slidably installed inside the sampler housing 1 and is sealed to the sampler housing 1. The sampler inner core 2 slides axially along the sampler housing 1 until the sampling cotton positioning groove 3 is located inside the sampler housing 1, or slides until the sampling cotton positioning groove 3 is completely extended from the front end of the sampler housing 1.

[0031] In this embodiment, the sampling cotton 10 positioned in the sampler inner core 2 is effectively sealed by the sampler outer shell 1 before and after sampling, preventing external environmental contamination of the sampling cotton 10. The sampling cotton positioning groove 3 is used to accurately position the sampling cotton 10, ensuring that the position of the sampling cotton 10 is stable during the sampling process, thereby ensuring that the sampling cotton 10 is accurately aligned with the sampling area or sealed inside the sampler outer shell 1. The axial sliding design of the sampler outer shell 1 and the sampler inner core 2 allows the sampling cotton 10 on the sampler inner core 2 to flexibly extend or retract from the inner cavity of the sampler outer shell 1, thereby ensuring that it can be fully extended and exposed to the airflow during sampling, and quickly retracted into the sampler outer shell 1 after sampling to achieve in-situ sealing and effectively isolate external interference. In addition, the entire device has a compact structure, is easy to operate, requires no additional packaging steps, is suitable for various scenarios, and significantly improves the reliability of bioaerosol sample preservation and detection accuracy.

[0032] Example 2 Based on Example 1, in this example, the sampler housing 1 and the sampler inner core 2 are fitted with a clearance, and the sampling cotton positioning groove 3 is provided with sealing rings 6 on both the front and rear sides. Each sealing ring 6 is embedded in the annular groove 7 on the outer wall of the sampler inner core 2, and each sealing ring 6 achieves sealing by contacting the inner wall of the sampler housing 1.

[0033] In this embodiment, the sealing ring 6 is used to effectively seal the sampling cotton 10 after sampling, preventing external contaminants from entering or internal samples from escaping, thus improving the integrity of sample preservation and the accuracy of detection. The annular groove 7 ensures the stable installation of the sealing ring 6, avoiding displacement that could lead to sealing failure. Simultaneously, the clearance fit design ensures smooth sliding of the sampler inner core 2 without mutual wear, ensuring the long-term reliability and sealing performance of the device. To improve the sealing effect, multiple sealing rings 6 can be provided on each side, such as... Figure 1 and Figure 2 Two are set in the middle.

[0034] Example 3 like Figure 1 and Figure 2 As shown, based on Embodiment 2, in this embodiment, the front end of the sampler housing 1 is provided with a front end cover 4 for axial positioning of the sampler inner core 2. The front end cover 4 is detachably connected to the sampler housing 1 by means of threaded connection or snap-fit. The rear end inner wall of the sampler housing 1 is provided with an end boss 5 for axial positioning of the sampler inner core 2. The end boss 5 is a protrusion protruding from the rear end inner wall of the sampler housing 1.

[0035] In this embodiment, the front end cap 4 and the rear end protrusion 5 are used to fix the axial position between the sampler inner core 2 and the sampler outer shell 1 before and after sampling, respectively. This prevents the sampling cotton 10 on the sampler inner core 2 from accidentally sliding out from the front or rear end of the sampler outer shell 1 due to vibration or external force during the transfer of the sampling cotton 10 before or after sampling, thus avoiding the problem of exposure, contamination or loss of the sampling cotton 10. This ensures that the sampling cotton 10 can always maintain a stable sealed state before or after sampling, effectively guaranteeing the integrity and cleanliness of the sample. The front end cap 4 and the sampler outer shell 1 can be detachably connected by threaded connection or snap-fit, making it easy to remove the front end cap 4 before sampling. The end cap 4 ensures that the sampler core 2 can slide smoothly to the designated position where the sampling cotton 10 enters the airflow channel. After sampling, the front end cap 4 is reinstalled to achieve sealing. The end boss 5 axially abuts against the sealing ring 6 on the rear side of the sampling cotton positioning groove 3 to achieve axial positioning of the sampler core 2 when it retracts to the limit position inside the shell. This prevents it from retracting too far and causing the sealing ring 6 to fall out of the effective sealing area, or the sampling cotton to slide out from the rear end of the sampler shell 1 due to external force, resulting in sample contamination or loss. This further improves the sealing reliability of the device and the safety of the sampling cotton 10 storage, while preventing external airflow or contaminants from entering and ensuring the accuracy of the test results.

[0036] Example 4 Based on Example 3, in this example, the axial dimension between the sealing rings 6 on the front and rear sides of the sampling cotton positioning groove 3 is smaller than the axial length of the sampler housing 1.

[0037] In this embodiment, the axial distance between the sealing rings 6 on both sides of the sampling cotton positioning groove 3 is less than the axial dimension of the sampler housing 1. This ensures that when the sampler inner core 2 slides into the sampler housing 10 for sealed storage, the sealing rings 6 on both sides of the sampling cotton positioning groove 3 are simultaneously located inside the sampler housing. This ensures that the sampling cotton is located within the closed space formed by the sampler housing, the sampling cotton inner core, and the sealing rings on both sides, maintaining a clean environment throughout the entire storage and transportation process.

[0038] Example 5 Based on Example 4, in this example, all the sealing rings 6 are made of wear-resistant material.

[0039] In this embodiment, the sealing ring 6 is made of wear-resistant material, which not only has a long service life, but also greatly reduces the risk of decreased sealing performance due to wear, ensuring good airtightness after multiple sliding.

[0040] Example 6 Based on Examples 1 to 5, in this example, the sampling cotton positioning groove 3 is matched with the size of the sampling cotton, and the depth of the sampling cotton positioning groove 3 is greater than the thickness of the sampling cotton 10.

[0041] In this embodiment, the sampling cotton positioning groove 3 is matched with the size of the sampling cotton 10 to ensure that the sampling cotton 10 is installed firmly and in a precise position, avoiding loosening due to airflow impact, which would lead to a decrease in sampling efficiency or uneven sampling.

[0042] Example 7 Based on embodiment 7, in this embodiment, the rear end of the sampler core 2 extends axially to form a handle 8, and the end of the handle 8 is provided with a pull handle 9.

[0043] In this embodiment, the handle 8 is designed to facilitate the operator to push and pull the sampler inner core 2, allowing it to slide axially relative to the sampler outer shell 1, thereby achieving accurate entry and exit and positioning of the sampling cotton, ensuring convenient operation and precise action during the sampling process.

[0044] Example 8 Based on Embodiment 7, the outer wall of the handle 8 in this embodiment is provided with an axial positioning boss 12 for axially limiting the length of the front end of the sampler inner core 2 extending out of the sampler outer shell 1.

[0045] In this embodiment, the axial positioning boss 12 is used to limit the extreme position of the sampler inner core 2 sliding forward, preventing it from over-extending and causing the sampling cotton 10 to not be aligned with the sampling area, thus ensuring accurate and reliable sampling position. The axial positioning boss 12 is an annular protrusion structure integrally formed with the sampler inner core 2. When the front end face of the annular protrusion abuts against the rear end face of the sampler outer shell 1, the axial positioning of the sampler inner core 2 can be achieved.

[0046] Example 9 Based on Embodiment 7, in this embodiment, the outer wall of the sampler housing 1 is provided with an axial positioning boss 2 13 for axially positioning its installation position on the sampler 11. The axial positioning boss 2 13 is an annular protrusion structure integrally formed with the sampler housing 1. When the front end face of the annular boss abuts against the installation position on the sampler 11, it can realize the axial positioning of the sampler housing 1 on the sampler 11.

[0047] In this embodiment, the second axial positioning boss 13 can not only limit the axial position of the sampler housing 1 on the sampler, thereby ensuring that after the sampler core 2 inside the sampler housing 1 extends out by a set length, the sampling cotton 10 can be accurately aligned with the sampling area, ensuring the repeatability and data accuracy of the sampling process, effectively avoiding sampling errors caused by installation deviations, and greatly improving the stability and reliability of the test results, but also the outer wall of the second axial positioning boss 13 can be provided with threads for threaded connection with the front end cap 4, avoiding the direct machining of threads on the front outer wall of the thin-walled sampler housing 1, which would affect the strength of the sampler housing 1.

[0048] Example 10 like Figure 4 and Figure 5 As shown, this embodiment provides a slit impact bioaerosol sampler, including a mounting hole 14 and a sampling cotton sealing and preservation device installed in the mounting hole 14 as described in the above embodiments. The mounting hole 14 is connected to the sampling area and extends to the other side of the sampling area.

[0049] In this embodiment, the sampler uses high-speed airflow to impact the sampling cotton 10, thereby causing the biosol in the airflow to collide with and be captured on the sampling cotton 10. At this time, the sampling cotton 10 is located inside the mounting hole 14 and will not be in direct contact with the external environment. After sampling is completed, the sampler core 2 is pulled back first, so that the sampling cotton 10 leaves the sampling area and is sealed in place inside the sampler housing 1. Then, it is taken out as a whole from the mounting hole 14 of the sampler 11, which effectively avoids cross-contamination. The structure is simple and the operation is convenient.

[0050] The working principle of this utility model is as follows: Before sampling, the end of the sampler inner core 2 with the sampling cotton 10 installed is located inside the sampler outer shell 1. At this time, the front end of the sampler outer shell 1 is detachably connected to the front end cap 4, thereby limiting the front end of the sampler inner core 2. The end protrusion 5 provided on the inner wall of the rear end of the sampler outer shell 1 abuts against the sealing ring 6 on the rear side of the sampling cotton positioning groove 3, thereby limiting the rear end of the sampler inner core 2, ensuring that before sampling, the sampling cotton 10 is completely sealed inside the sampler outer shell 1, isolating it from external pollution.

[0051] During sampling, first remove the front cover 4, then insert the whole sampler 11 into the mounting hole 14, so that the axial positioning boss 2 on the outer wall of the sampler housing 1 abuts against the front step of the mounting hole 14, achieving precise axial positioning of the sampler housing 1. Then push the handle 8 to slide the sampler inner core 2 forward until the axial positioning boss 1 at the rear end of the sampler inner core 2 abuts against the rear end of the sampler housing 1. At this time, the sampling cotton 10 is precisely exposed in the sampling area corresponding to the mounting hole 14.

[0052] Then the sampler 11 is activated, so that the airflow to be sampled carries the bioaerosol into the sampling area at high speed, impacts the sampling cotton 10, and the bioaerosol in the airflow is trapped in the sampling cotton 10, while the airflow is discharged from the sampler.

[0053] After sampling, pull the handle 9 at the end of the handle 8 in the opposite direction to allow the sampling cotton 10 to retract completely into the sampler housing 1 along with the sampler inner core 2, achieving in-situ sealing. After the whole sample is removed, the front end cap 4 is reconnected to the front end of the sampler housing 1 to ensure that the sample is leak-free and uncontaminated. The entire process complies with biosafety requirements, ensuring the authenticity of the test results and the safety of the operators.

[0054] 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, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] 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.

[0056] 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 sampling cotton sealing and preservation device, characterized in that, The sampler includes a sampler housing (1) and a sampler inner core (2). The sampler inner core (2) is provided with a sampling cotton positioning groove (3). The sampler inner core (2) is axially slidably installed inside the sampler housing (1) and sealed to the sampler housing (1). The sampler inner core (2) slides axially along the sampler housing (1) until the sampling cotton positioning groove (3) is located inside the sampler housing (1), or slides until the sampling cotton positioning groove (3) is fully extended from the front end of the sampler housing (1).

2. The sampling cotton sealing and preservation device according to claim 1, characterized in that, The sampler housing (1) and the sampler inner core (2) are fitted with a clearance. The sampling cotton positioning groove (3) is provided with sealing rings (6) on both the front and rear sides. Each sealing ring (6) is embedded in the annular groove (7) on the outer wall of the sampler inner core (2). Each sealing ring (6) is sealed by contacting the inner wall of the sampler housing (1).

3. The sampling cotton sealing and preservation device according to claim 2, characterized in that, The front end of the sampler housing (1) is provided with a front end cap (4) for axial positioning of the sampler inner core (2). The front end cap (4) is detachably connected to the sampler housing (1). The rear end inner wall of the sampler housing (1) is provided with an end boss (5) for axial positioning of the sampler inner core (2).

4. The sampling cotton sealing and preservation device according to claim 3, characterized in that, The axial distance between the sealing rings (6) on the front and rear sides of the sampling cotton positioning groove (3) is less than the axial length of the sampler shell (1).

5. The sampling cotton sealing and preservation device according to claim 4, characterized in that, All of the sealing rings (6) are made of wear-resistant material.

6. A sampling cotton sealing and preservation device according to any one of claims 1 to 5, characterized in that, The sampling cotton positioning groove (3) is matched with the size of the sampling cotton, and the depth of the sampling cotton positioning groove (3) is greater than the thickness of the sampling cotton (10).

7. A sampling cotton sealing and preservation device according to claim 6, characterized in that, The sampler core (2) extends axially at its rear end to form a handle (8), and the end of the handle (8) is provided with a pull handle (9).

8. The sampling cotton sealing and preservation device according to claim 7, characterized in that, The outer wall of the handle (8) is provided with an axial positioning boss (12) for axially limiting the length of the sampler inner core (2) extending out of the sampler outer shell (1).

9. A sampling cotton sealing and preservation device according to claim 8, characterized in that, The outer wall of the sampler housing (1) is provided with an axial positioning boss (13) for axially positioning its installation position on the sampler (11).

10. A slit-impact bioaerosol sampler, characterized in that, Includes a mounting hole (14) and a sampling cotton sealing and preservation device as described in any one of claims 1 to 9, which is installed in the mounting hole (14), the mounting hole (14) being in communication with the sampling area and extending to the other side of the sampling area.

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