Sampling box capable of keeping dust measurement filter membrane dry

Abstract

The utility model relates to the technical field of occupational disease hazard factor detection equipment in workplaces, in particular to a sampling box capable of keeping a dust measurement filter membrane dry, which comprises a sampling box main body, and a microporous permeable plate is embedded at the bottom end in the sampling box main body. A plurality of vertical partition plates are uniformly arranged in the filter membrane storage area in the sampling box main body, positioning seats fixed on the top surface of a microporous permeable plate are arranged among the vertical partition plates, and a plurality of drying agent boxes are uniformly arranged in a drying agent accommodating cavity in the sampling box main body; and the top of the sampling box main body is covered with the double-sealing structure formed by the inner sealing cover plate and the outer sealing cover plate. According to the sampling box capable of keeping the dust measurement filter membrane dry, the structural design is optimized, so that the moisture resistance is remarkably enhanced, the filter membrane is kept dry all the time in the storage and transportation processes, and the accuracy and reliability of detection data are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of workplace occupational hazard factor detection equipment, specifically a sampling box that can keep the dust filter membrane dry. Background Technology

[0002] Air quality assessment is a crucial step in workplace occupational hazard detection. Dust concentration is a key indicator of air quality. To accurately measure air dust content, specific instruments are typically used to collect air samples and filter out particulate matter. The dust filter membrane, as a core component in this process, is responsible for capturing and retaining tiny airborne particles, and its condition directly affects the validity of the final test results. Therefore, ensuring proper storage conditions for the dust filter membrane before, during, and after sampling, as well as during transportation, is of paramount importance.

[0003] While existing air sample collection devices can meet basic sample collection needs, they still fall short in ensuring the dryness of dust filter membranes. Once the filter membrane absorbs too much moisture, it will not only affect the accuracy of subsequent analysis results, but may also cause changes in the physical properties of the filter membrane, such as becoming brittle or sticking together, thereby compromising the integrity of the sample. At the same time, traditional sampling boxes lack effective moisture-proof mechanisms, especially in high humidity environments, making it difficult to prevent moisture intrusion. This makes it difficult to fully guarantee the quality of the filter membrane during long-term storage or long-distance transportation, thus adversely affecting the final test data. Utility Model Content

[0004] The purpose of this invention is to provide a sampling box that can keep the dust filter membrane dry, so as to solve the problem mentioned in the background art that the current air sample sampling devices are insufficient in moisture-proof performance, and cannot effectively prevent moisture from affecting the dust filter membrane, resulting in changes in the physical properties of the sample and inaccurate test results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sampling box capable of keeping dust filter membranes dry, comprising a sampling box body, wherein a microporous breathable plate is embedded in the bottom of the sampling box body, the microporous breathable plate dividing the upper and lower spaces inside the sampling box body into a filter membrane storage area and a desiccant receiving cavity, wherein the filter membrane storage area inside the sampling box body is uniformly provided with a plurality of vertical partitions, and a positioning seat fixed to the top surface of the microporous breathable plate is provided between each vertical partition, wherein an elastic pad is provided on the bottom inner wall of the positioning seat, wherein a plurality of desiccant boxes are uniformly provided in the desiccant receiving cavity inside the sampling box body, and the top of the sampling box body is covered with a double sealing structure consisting of an inner sealing cover and an outer sealing cover, wherein an inner sealing gasket and an outer sealing gasket are respectively provided on the inner edge inner wall of the inner sealing cover and the outer sealing cover.

[0006] Preferably, the four perimeters of the top of the sampling box body are provided with the snap-fit ​​portion, the snap-fit ​​portion is provided with screw holes, and the inner wall of the four perimeters of the inner sealing cover is provided with snap-fit ​​grooves that match the structure of the snap-fit ​​portion.

[0007] Preferably, both sides of the outer sealing cover are connected to the locking bolts through the threaded structure, and the locking bolts penetrate the side of the inner sealing cover and are connected to the screw holes provided on the snap-fit ​​part.

[0008] Preferably, the bottom inner wall of the sampling box body is uniformly provided with a plurality of screw interfaces that match the bottom structure of the desiccant box, and the desiccant box has a hollow structure and a section of thread structure on the bottom outer wall.

[0009] Preferably, the microporous breathable plate is a rectangular plate structure made of polymer material, and the microporous breathable plate is uniformly provided with a number of finely distributed small holes.

[0010] Preferably, the inner sealing cover has a plurality of strip-shaped slots uniformly provided on its bottom inner wall that match the top structure of the vertical partition.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: This sampling box, which keeps the dust-measuring filter membrane dry, significantly enhances moisture-proof performance through optimized structural design, ensuring that the filter membrane remains dry during storage and transportation, thereby improving the accuracy and reliability of the test data. The sampling box, through its microporous breathable plate design, not only effectively separates the upper and lower spaces but also ensures that moisture is effectively absorbed by the desiccant box below without affecting the dry environment of the filter membrane storage area above. Vertical partitions and positioning seats ensure the stable placement of the filter membrane, preventing sample mixing or damage. Simultaneously, the double-sealing structure consisting of an inner and outer sealing cover, combined with inner and outer sealing gaskets, provides an additional protective layer, greatly reducing the possibility of external moisture intrusion and further guaranteeing the quality of the filter membrane and the accuracy of the test results. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a sampling box structure that can keep the dust filter membrane dry according to the present invention;

[0013] Figure 2 This is a schematic diagram showing the sequential connection of the inner sealing cover, outer sealing cover, and main body of the sampling box, which can keep the dust filter membrane dry according to the present invention.

[0014] Figure 3 This is a schematic diagram of the microporous breathable plate structure of a sampling box that can keep the dust filter membrane dry according to the present invention;

[0015] Figure 4This is a schematic diagram of the bottom structure of the inner sealing cover of a sampling box that can keep the dust filter membrane dry according to the present invention.

[0016] In the diagram: 1. Sampling box body; 101. Snap-fit ​​part; 2. Microporous vent plate; 3. Vertical partition; 4. Positioning seat; 401. Elastic pad; 5. Desiccant box; 6. Screw interface; 7. Inner sealing cover; 701. Inner sealing gasket; 702. Snap-fit ​​groove; 8. Outer sealing cover; 801. Outer sealing gasket; 9. Locking bolt. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-4This utility model provides a technical solution: a sampling box that can keep the dust filter membrane dry, including a sampling box body 1. A microporous vent plate 2 is embedded in the bottom of the sampling box body 1. The microporous vent plate 2 divides the upper and lower spaces inside the sampling box body 1 into a filter membrane storage area and a desiccant containment cavity, respectively. Several vertical partitions 3 are uniformly welded and fixed in the filter membrane storage area inside the sampling box body 1. A positioning seat 4 is fixed to the top surface of the microporous vent plate 2 between each vertical partition 3. An elastic pad 401 is provided on the bottom wall of the positioning seat 4. When the filter membrane is placed, the filter membrane will press on the elastic pad 401 on the bottom inner wall of the positioning seat 4, causing the elastic pad 401 to be compressed. When the lid of the sampling box body 1 is opened and the pressure above the filter membrane is removed, the elastic pad 401 will return to its original position. Its original shape generates an upward thrust, gently lifting the filter membrane for easy removal by the user. The desiccant chamber inside the sampling box body 1 is evenly equipped with several desiccant boxes 5. The top of the sampling box body 1 is covered by a double-sealed structure consisting of an inner sealing cover 7 and an outer sealing cover 8. Inner sealing gaskets 701 and outer sealing gaskets 801 are respectively adhered and fixed to the inner walls of the edges of the inner sealing cover 7 and outer sealing cover 8. This structure of the sampling box body 1 divides the internal space into a filter membrane storage area and a desiccant chamber through a microporous breathable plate 2. When the double-sealed top cover consisting of the inner sealing cover 7 and outer sealing cover 8 is closed, the inner sealing gaskets 701 and outer sealing gaskets 801 are tightly fitted to the edges of the sampling box body 1, forming an almost completely sealed environment. In this environment, the vertical partition 3 not only separates different filter membranes but also works in conjunction with the positioning seat 4 to ensure that each filter membrane is securely placed on the microporous breathable plate 2, free from external interference. Simultaneously, several desiccant boxes 5 located in the desiccant chamber begin to function, absorbing any moisture that may be present in the filter membrane storage area through the microporous breathable plate 2, maintaining a low humidity level throughout the area. This effectively prevents moisture intrusion even in high humidity environments, avoiding common problems in traditional sampling devices such as filter membrane hygroscopicity, brittleness, adhesion, or changes in physical properties. This protects the integrity and stability of the sample, solves the problem of long-term dry preservation of dust-measuring filter membranes in existing technologies, and significantly improves the accuracy and reliability of the detection data. The sampling box body 1 is highly reliable, making it particularly suitable for situations requiring long-distance transportation or long-term sample preservation. Furthermore, all four outer walls of the sampling box body 1 are equipped with desiccant containers, further enhancing its moisture-proof performance. This ensures that even in extremely humid environments, the possibility of moisture entering the sampling box body 1 is minimized, thus better protecting the dust filter membrane from humidity. The top four edges of the sampling box body 1 are equipped with snap-fit ​​parts 101, which are integral with the sampling box body 1. The snap-fit ​​parts 101 have screw holes, and the inner walls of the inner sealing cover 7 have snap-fit ​​grooves 702 that match the structure of the snap-fit ​​parts 101. Both sides of the outer sealing cover 8 are connected with locking bolts 9 via threaded connections.Furthermore, the locking bolts 9 penetrate the side of the inner sealing cover 7 and connect with the threaded holes provided on the snap-fit ​​part 101. The sampling box body 1 of this structure engages with the snap-fit ​​grooves 702 provided on the inner wall of the four periphery of the inner sealing cover 7 via the snap-fit ​​part 101, ensuring that the inner sealing cover 7 can be accurately and securely connected to the sampling box body 1. When the locking bolts 9 on both sides of the outer sealing cover 8 are tightened through the threaded structure, they not only penetrate the side of the inner sealing cover 7 but also connect tightly with the threaded holes on the snap-fit ​​part 101, forming a complete mechanical locking structure. This allows the inner sealing cover 7 and the outer sealing cover 8 to be tightly joined in the closed state, providing a highly reliable sealing effect and preventing external moisture from entering. This design ensures that even if the sample is subjected to bumps or vibrations during transportation, the cover will not easily loosen or open, effectively protecting the internal filter membrane from environmental factors and ensuring the dryness and integrity of the sample. Several screw interfaces 6, matching the bottom structure of the desiccant box 5, are evenly welded and fixed to the inner bottom wall of the sampling box body 1. The desiccant box 5 has a hollow structure and a threaded section on its outer bottom wall. Desiccant is placed inside the desiccant box 5. This structure allows moisture to pass freely through its structure and be absorbed by the desiccant inside, while preventing the desiccant from scattering. This combination ensures that the desiccant can efficiently absorb moisture in the filter membrane storage area, maintaining a low-humidity environment. Furthermore, the desiccant box 5 is removable via the screw interface 6, facilitating regular replacement or regeneration of the desiccant and ensuring long-term effective moisture protection. The microporous breathable plate 2 is a rectangular plate structure made of high-molecular polymer material, with a number of finely distributed pores evenly distributed on it. This structure ensures that moisture can effectively pass through the pores and be absorbed by the desiccant box 5 below, while preventing desiccant particles from moving upwards or the filter membrane from directly contacting the desiccant. The choice of high-molecular polymer material also gives the microporous breathable plate 2 excellent chemical resistance and mechanical strength, ensuring stable operation in various environments. The inner sealing cover 7 has evenly distributed pores on its inner wall. Several strip-shaped slots that align with the top structure of the vertical partition 3 ensure that when the inner sealing cover 7 is closed, these slots precisely embed into the top of the vertical partition 3, forming a stable and tight connection. This not only enhances the seal between the inner sealing cover 7 and the sampling chamber body 1 but also guarantees the stability of the vertical partition 3 within the filter membrane storage area, preventing displacement due to external forces or vibrations. This interlocking mechanism between the vertical partition 3 and the inner sealing cover 7 allows each filter membrane to be precisely separated and fixed, avoiding sample confusion or physical contact, protecting the integrity and independence of the filter membrane. Furthermore, this structure simplifies the placement and retrieval of the filter membrane, improving operational convenience.

[0019] Working principle: When using this sampling box that keeps the dust filter membrane dry, firstly, the desiccant box 5 containing desiccant is screwed into the threaded interface 6 on the inner wall of the sampling box body 1 through the threaded structure on its bottom outer wall. This ensures that the desiccant box 5 is firmly installed in the desiccant receiving cavity, allowing moisture to be absorbed by the internal desiccant through the perforated structure of the desiccant box 5. Then, a microporous breathable plate 2 is embedded inside the sampling box body 1, and the prepared dust filter membrane is placed in the filter membrane storage area inside the sampling box body 1, separated by evenly arranged vertical partitions 3. Each filter membrane is securely placed on the positioning seat 4 fixed to the top surface of the microporous breathable plate 2. Subsequently, the inner sealing cover 7 is closed on the top of the sampling box body 1. At this time, the strip-shaped indentation on the bottom inner wall of the inner sealing cover 7 will align with the top of the vertical partition 3. The fit ensures the stability of the vertical partition 3 and the precise separation of the filter membrane. The inner sealing gasket 701 on the inner wall of the inner sealing cover 7 fits tightly against the edge of the sampling box body 1, initially forming a sealed environment. Finally, the outer sealing cover 8 is placed on top of the inner sealing cover 7. The locking bolts 9 on both sides pass through the sides of the inner sealing cover 7 and connect with the screw holes on the snap-fit ​​parts 101 on the four sides of the top edge of the sampling box body 1, so that the outer sealing cover 8 and the inner sealing cover 7 together form a double sealing structure. The outer sealing gasket 801 on the inner wall of the outer sealing cover 8 further enhances the sealing effect. When the locking bolts 9 are fully tightened, an almost completely sealed space is formed between the outer sealing cover 8 and the inner sealing cover 7 and the sampling box body 1, ensuring that the internal environment is not affected by the outside world, thus completing a series of tasks.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sampling box capable of keeping a dust filter membrane dry, comprising a sampling box body (1), characterized in that: The bottom of the sampling box body (1) is fitted with a microporous breathable plate (2). The microporous breathable plate (2) divides the upper and lower spaces inside the sampling box body (1) into a filter membrane storage area and a desiccant containment cavity, respectively. The filter membrane storage area inside the sampling box body (1) is uniformly provided with several vertical partitions (3). Each vertical partition (3) is provided with a positioning seat (4) fixed to the top surface of the microporous breathable plate (2). The bottom inner wall of the positioning seat (4) is provided with an elastic pad (401). The desiccant containment cavity inside the sampling box body (1) is uniformly provided with several desiccant boxes (5). The top of the sampling box body (1) is covered with a double sealing structure consisting of an inner sealing cover plate (7) and an outer sealing cover plate (8). The inner sealing pad (701) and the outer sealing pad (801) are respectively provided on the inner edge inner wall of the inner sealing cover plate (7) and the outer sealing cover plate (8).

2. The sampling box for keeping the dust filter membrane dry according to claim 1, characterized in that: The sampling box body (1) has four peripheral edges with snap-fit ​​parts (101), and the snap-fit ​​parts (101) have screw holes. The inner sealing cover plate (7) has snap-fit ​​grooves (702) on its inner walls that match the structure of the snap-fit ​​parts (101).

3. The sampling box for keeping the dust filter membrane dry according to claim 2, characterized in that: Both sides of the outer sealing cover (8) are connected to locking bolts (9) by threaded structure, and the locking bolts (9) penetrate the side of the inner sealing cover (7) and are connected to the screw holes provided on the snap-fit ​​part (101).

4. A sampling box for keeping the dust filter membrane dry according to claim 1, characterized in that: The sampling box body (1) has several screw interfaces (6) that match the bottom structure of the desiccant box (5) evenly arranged on the bottom inner wall. The desiccant box (5) has a hollow structure and a threaded structure on the bottom outer wall.

5. A sampling box for keeping the dust filter membrane dry according to claim 1, characterized in that: The microporous breathable plate (2) is a rectangular plate structure made of polymer material, and the microporous breathable plate (2) has a number of finely distributed holes evenly distributed on it.

6. A sampling box for keeping the dust filter membrane dry according to claim 1, characterized in that: The inner sealing cover (7) has several strip-shaped slots that match the top structure of the vertical partition (3) evenly arranged on its bottom inner wall.

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