A downhole protection filter box structure with water filtering function

Abstract

This utility model discloses a downhole protective filter box structure with water filtration function, belonging to the field of respiratory protection filtration. The disclosed downhole protective filter box structure with water filtration function includes a water filtration protection structure. This water filtration protection structure, combined with other components, effectively prevents moisture from entering the filter box, providing a dry and stable environment for the other components and ensuring they remain in good condition. This structure not only protects the dryness and integrity of the internal items but also significantly extends their service life. It is particularly suitable for use in humid, rainy, or other high-humidity environments, providing more reliable protection for workers and solving the technical problem that existing dust filter boxes are easily affected by humid environments.

Description

Technical Field

[0001] This utility model belongs to the field of respiratory protection filtration, and relates to a downhole protective filter box structure with water filtration function. Background Technology

[0002] Working underground, frontline workers face extremely harsh working conditions, with high temperatures being one of the main challenges. Due to geothermal activity deep within the mine and heat dissipation from machinery, underground temperatures are often significantly higher than on the surface. This causes miners to sweat profusely during long working hours, and their breathing rate also increases. The moisture exhaled by the miners, in the high temperature and humidity environment, easily penetrates the filter cotton inside their protective gear.

[0003] Currently, KP100-level filter cartridges are commonly used in mines. These cartridges primarily use fiberglass as the protective material to filter dust and harmful particles from the air, protecting miners' respiratory systems. However, when moisture penetrates the fiberglass, it not only clogs the micropores on the fiber surface, reducing its filtration efficiency, but also accelerates the aging process of the fiberglass, thus shortening its lifespan. Consequently, the performance of the protective equipment gradually deteriorates, failing to effectively guarantee the health and safety of miners. Therefore, maintaining the performance of filter cotton and extending its service life in such an environment is a key issue that requires attention in mine safety management.

[0004] Chinese patent CN220495895U discloses a novel protective dust filter box, comprising a box body, a filter element, and a lid. The dust filter box includes a cubic box body, a shield-shaped lid, and an internal filter element. A one-way locking groove is provided on the outer side of the box body, which engages with a one-way locking buckle on the inner side of the lid, making the connection non-removable and ensuring the dust filter box's sealing and security. The outer contour of the lid is larger than the box body, and the area between the lid and the box body forms an air inlet, while the air outlet at an off-center position in the center of the box body is equipped with multiple connecting slots. This design not only increases the air intake and effectively reduces suction resistance, but also accelerates the discharge time of water mist and other particles by optimizing the airflow path, thereby extending the service life of the dust filter box and reducing discomfort for miners wearing it for extended periods, making it suitable for harsh environments such as underground mines. However, this type of dust filter box does not consider the impact of moisture exhaled from workers' mouths and various humid environments on the protective filter cotton inside the box. Utility Model Content

[0005] The purpose of this utility model is to provide a downhole protective filter box structure with water filtration function to solve the technical problem that existing dust filter boxes are easily affected by humid environments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a downhole protective filter box structure with water filtration function, including a water filtration protection structure, a water filtration protection structure shell, and a connecting structure; the water filtration protection structure shell includes a baffle and a front shell; the baffle and the front shell are connected by the connecting structure, and a gap is left between the baffle and the front shell; the water filtration protection structure is disposed in the gap between the baffle and the front shell.

[0007] Furthermore, the water filtration protection structure includes a first front-end water filtration membrane and a first rear-end water filtration membrane stacked on top of each other; the first rear-end water filtration membrane is disposed near the front shell; the first front-end water filtration membrane is disposed near the baffle; both the first front-end water filtration membrane and the first rear-end water filtration membrane are electrospun film layers; the electrospun film layer is composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

[0008] Furthermore, the connecting structure includes a connecting part and a buckle; the connecting part is disposed at both ends of the baffle and the front shell; the buckle is engaged inside the connecting part to connect the baffle and the front shell; the surface of the front shell is provided with a vent hole; the surface of the vent hole is provided with a fence structure. The upper end of the baffle is connected and fixed with a connecting buckle between the filter cotton protective shell and the face mask; the connecting buckle between the filter cotton protective shell and the face mask is provided with an internal filter.

[0009] This utility model also discloses a downhole protective filter box structure with water filtration function, including a water filtration protection structure and a filter box; the filter box includes an upper top cover and a lower top cover; the upper top cover and the lower top cover are connected to each other, and the water filtration protection structure is disposed between the upper top cover and the lower top cover.

[0010] Furthermore, the water filtration protection structure includes a protective layer, filter cotton, and a filter box membrane; the protective layer, filter cotton, and filter box membrane are stacked sequentially between the upper top cover and the lower top cover of the filter box; a filter cotton slot is provided inside the lower top cover of the filter box; the filter cotton and the filter box membrane are simultaneously secured inside the protective layer and the filter cotton slot.

[0011] Furthermore, the filter cotton is a HEPA filter cotton; an exhalation channel is provided at the edge of the top cover of the filter box.

[0012] This utility model also discloses a downhole protective filter box structure with water filtration function, including a water filtration protection structure and a filter box; the filter box includes an upper cover and a filter cotton protective cover, the upper cover and the filter cotton protective cover are connected to each other, and the water filtration protection structure is disposed between the upper cover and the filter cotton protective cover.

[0013] Furthermore, a pressing structure is provided on the inner wall of the filter cotton protective cover; the water filtration protection structure includes dust filter cotton and dust and toxic substance filter boxes and water filtration membranes disposed on both surfaces of the dust filter cotton; The inner wall of the top cover is provided with a tight structure; the dust and toxic substance filter box water filter membrane is an electrospun film layer, which is composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

[0014] This utility model also discloses a downhole protective filter box structure with water filtration function, including a water filtration protection structure and a disc structure; the water filtration protection structure is disposed inside the disc structure; the disc structure includes a first disc and a second disc connected to each other; the water filtration protection structure is disposed between the first disc and the second disc.

[0015] Furthermore, the water filtration protection structure includes a filter cotton material layer and a second front-end water filtration membrane and a second rear-end water filtration membrane disposed on both surfaces of the filter cotton material layer; a filter box buckle is disposed at the center of the second disc; the first disc and the second disc are connected by the filter box buckle; the second front-end water filtration membrane and the second rear-end water filtration membrane are both electrospun film layers, and the electrospun film layer is composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This utility model discloses three types of downhole protective filter box structures with water filtration function. Each type of downhole protective filter box structure is equipped with a water filtration protection structure. This water filtration protection structure, together with other components, can effectively prevent water from entering the filter box, providing a dry and stable environment for the other components inside the structure and ensuring that they always maintain good condition. This structure not only protects the dryness and integrity of the internal items, but also significantly extends their service life. It is especially suitable for use in humid, rainy, or other high-humidity environments, providing more reliable protection for operators and solving the technical problem that existing dust filter boxes are easily affected by humid environments.

[0017] Furthermore, the downhole protective filter box structure with water filtration function of this utility model has a special protective design for the inner side of the filter box by setting a water filtration membrane in the water filtration protection structure. This water filtration membrane can effectively block water vapor from entering the filter box from the inside, thereby providing an additional protective barrier for the filter material and equipment inside the filter box, significantly improving the protective performance of the filter box, extending the service life of the filter material, and also providing a more reliable guarantee for the safety of operators and the stable operation of equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the back of the downhole protective filter box structure with water filtration function designed in Embodiment 1 of this utility model; Figure 2 This is a front view of the downhole protective filter box structure with water filtration function designed in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the replaceable water filtration protection structure in the downhole protective filter box structure with water filtration function designed in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the internal structure of the downhole protective filter box structure with water filtration function designed in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the outer surface of the downhole protective filter box structure with water filtration function designed in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the internal structure of the downhole protective filter box structure with water filtration function designed in Embodiment 3 of this utility model; Figure 7 This is a schematic diagram of the outer surface of the downhole protective filter box structure with water filtration function designed in Embodiment 3 of this utility model; Figure 8 This is a schematic diagram of the downhole protective filter box structure with water filtration function designed in Embodiment 4 of this utility model; The components are as follows: 11. Baffle; 12. Connecting part; 13. Buckle; 14. First front-end filter membrane; 15. First rear-end filter membrane; 16. Built-in filter; 17. Ventilation hole; 18. Connecting buckle between filter cotton protective shell and mask; 21. Filter box top cover; 211. Protective layer; 22. Filter cotton; 23. Filter box filter membrane; 24. Filter box bottom cover; 25. Exhalation channel; 26. Filter cotton slot; 31. Dust filter cotton; 32. Top cover; 33. Filter box; 34. Filter cotton protective cover; 35. Tight-fitting structure; 36. Tight structure; 41. Second rear-end filter membrane; 42. Second front-end filter membrane; 43. Filter box buckle. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 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 should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] This utility model discloses a protective filter box structure for underground mining with water filtration function, applicable to most current filter boxes. This structure can effectively filter water vapor in the environment and water vapor exhaled by workers, thereby protecting the protective filter element inside the filter box and extending its service life. This design not only solves the problem of traditional filter boxes being prone to moisture in humid environments, but also improves the respiratory protection effect for underground miners, enhancing the practicality and durability of the filter box.

[0022] This utility model discloses a downhole protective filter box structure with water filtration function. The main water filtration protection structure can have different design schemes depending on the filter box. The water filtration membrane is an electrospun thin film layer, which plays the role of filtering water vapor. The water filtration membrane includes, but is not limited to, the first front-end water filtration membrane 14, the first rear-end water filtration membrane 15, the filter box water filtration membrane 23, the dust and toxic substance filter box water filtration membrane, the second front-end water filtration membrane 42, and the second rear-end water filtration membrane 41 mentioned in this utility model.

[0023] Preferably, the preparation process of the electrospun film layer includes electrospinning and spunbonding, and the substrate used is a nonwoven material layer.

[0024] Preferably, in the electrospinning and spunbonding technology, the organic fiber material layer sprayed onto the substrate includes organic material layers such as polypropylene and polyethylene terephthalate.

[0025] Preferably, in the electrospinning and spunbonding technology, the purpose of the organic fiber material layer is to block external moisture, protect the internal filter cotton, and ensure that the air resistance of the filter box is not affected.

[0026] Preferably, in the electrospinning and spunbonding technology, when the polypropylene material layer is prepared, the spinneret diameter of the equipment is in the range of 0.3~0.5 mm.

[0027] Preferably, in the electrospinning and spunbonding technology, when the polyethylene terephthalate material layer is prepared, the spinneret diameter of the equipment is in the range of 0.2~0.3 mm.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1 like Figure 1 As shown, this embodiment discloses a first type of downhole protective filter box structure with water filtration function. It is a filter cotton protective shell with replaceable filter cotton and its internal structure. The water filtration protection structure included is replaceable and mainly includes the following structure: The baffle 11 is an important component of the filter cotton protective shell, used to seal and protect the internal filter cotton (water filtration protection structure). The baffle 11 is securely fixed to the front shell by engaging with the connecting part 12 via the snap fastener 13. When it is necessary to replace the filter cotton composed of the first front water filtration membrane 14 and the first rear water filtration membrane 15 (water filtration protection structure), the operator only needs to open the snap fastener 13 to easily open the baffle 11, thus facilitating the replacement of the filter cotton. This design not only improves the convenience of the replacement process but also ensures the sealing and stability of the filter cotton protective shell.

[0029] like Figure 2 As shown in the figure, the front view of the replaceable filter cotton protective shell is displayed. The connecting buckle 18 between the filter cotton protective shell and the face mask is the connection part between the front shell and the face mask. This buckle connection allows the front shell to be securely installed on the face mask while facilitating disassembly and replacement. An internal filter element 16 is installed inside the connecting buckle 18. The vent 17 is the air vent of the front shell and is the key channel for air to enter the filtration system. When the operator breathes, the inhaled air first enters the interior of the front shell through the vent 17. The surface of the vent 17 is designed with a grid structure, which performs preliminary filtration, effectively blocking larger particles and keeping them outside the vent, thereby reducing the burden on the internal filter cotton, extending its service life, and improving filtration efficiency and protective performance.

[0030] Currently, commonly used filter materials include meltblown fabric, nonwoven fabric, and glass fiber. These materials, due to their unique fiber structure and properties, are widely used in air filtration, liquid filtration, and protective equipment. However, they often face problems when exposed to water, affecting their filtration effect and efficiency. For example, while meltblown fabric has an ultra-fine fiber structure and high filtration efficiency, its fibers are too fine and easily clogged by moisture when exposed to water, leading to decreased air permeability and increased filtration resistance. Although nonwoven fabric has a certain degree of moisture resistance, in high humidity environments, the pores between its fibers can also be filled with moisture, reducing filtration performance. While glass fiber is heat-resistant and corrosion-resistant, its poor hydrophilicity means that once exposed to water, a water film easily forms on the fiber surface, hindering the adsorption and filtration of particulate matter. Therefore, when these materials come into contact with moisture or are in humid environments, their filtration efficiency will significantly decrease, and their service life will be shortened.

[0031] like Figure 3 The diagram shows a water filtration protection structure comprising a first front-end water filtration membrane 14 and a first rear-end water filtration membrane 15 stacked on top of each other. The water filtration membrane contains filter materials such as non-woven fabric, glass fiber, or meltblown fabric. The membrane is sewn together to protect the internal filter materials. This special protective layer effectively prevents moisture from further penetrating into the internal filter cotton, thus avoiding pore blockage, reduced air permeability, and filtration efficiency due to moisture absorption. In this way, the water filtration membrane not only provides additional protection for the internal filter cotton but also significantly extends its service life, ensuring the stability and reliability of the protective equipment in humid environments.

[0032] Example 2 like Figure 4 and Figure 5As shown in the figure, this embodiment discloses a second type of downhole protective filter box structure with water filtration function. It is a dual-tank filter box internal structure, and the specific structure is shown in the figure. It mainly includes a filter box top cover 21, and the filter box top cover 21 is provided with an exhalation channel 25 at the edge. This channel is the main channel for airflow in and out. The built-in filter cotton 22 is the main filter material of the filter box. It is fixed in the filter cotton slot 26 by pleating and heat setting. The filter cotton 22 has a HEPA structure. The application of HEPA structure in the filter box has significant advantages. Its high-efficiency filtration capacity can capture at least It filters out 99.97% of particles larger than 0.3 microns, including dust, pollen, bacteria, and viruses, providing workers with highly clean air. It is particularly suitable for use in medical settings, laboratories, and other environments with extremely high air quality requirements, as well as in heavily polluted environments such as coal mines, construction sites, and power plants. Furthermore, the HEPA filter cotton intercepts particles through physical filtration, without producing chemical reactions or secondary pollution, ensuring air purity. In addition, the multi-layered pleated design of the HEPA filter cotton not only increases the filtration area but also improves dust holding capacity, extends service life, and reduces replacement frequency. Its compact structure can accommodate filter cartridges of different sizes while maintaining excellent sealing to prevent unfiltered air from bypassing the filter media and entering the worker's body. The water protection structure includes a protective layer 211, filter cotton 22, and a filter cartridge water membrane 23.

[0033] To prevent the HEPA filter cotton 22 from losing its protective performance due to moisture immersion, a filter box water-filtering membrane 23 is specially installed at the bottom of the filter cotton 22. The main function of the filter box water-filtering membrane 23 is to effectively block the water vapor exhaled by the operator and prevent it from penetrating into the HEPA filter cotton inside, thereby ensuring that the filter cotton always maintains high-efficiency filtration performance and protective effect. A protective layer 211 is provided at the top cover 21 of the filter box. When the top cover 21 of the filter box is closed, this structure can hold the HEPA filter cotton 22 and the filter cotton slot 26 inside. When water vapor enters the filter box from the top cover 21 through the exhalation channel 25, the water vapor will accumulate in the gap between the bottom cover 24 of the filter box and the filter cotton slot 26, preventing water vapor from wetting the filter cotton from the top of the HEPA filter cotton 22, thus affecting the filtration effect and the service life of the filter cotton.

[0034] Example 3 like Figure 6 and Figure 7As shown in the figure, this embodiment discloses a third type of downhole protective filter box structure with water filtration function. It is a dust and toxic gas integrated filter box with water filtration function. As shown in the figure, it mainly includes a dust filter cotton 31. The dust filter cotton 31 is provided with a dust and toxic gas filter box water filter membrane on both sides. It can filter the moisture in the air entering the filter cotton and play a protective role for the filter cotton sheet. At the same time, it can also prevent moisture from entering the interior of the toxic gas filter box 33. The interior of the toxic gas filter box 33 is usually provided with activated carbon, which can adsorb toxic gases in the environment. The moisture in the air will also affect the protective effect and service life of the activated carbon in the toxic gas filter box 33. Therefore, using a water filter membrane has the advantage of extending the service life of this multi-functional filter box that is both dustproof and toxic gasproof.

[0035] Figure 7 The top view of the structure of the top cover 32 shows that a tight structure 36 is provided on the surface of the top cover 32 that contacts the dust filter cotton 31. This structure is specifically an uneven hexagonal structure. Figure 6 The filter cotton protective cover 34 has a pressing structure 35 on its lower surface that can firmly fix the filter cotton 31 to the surface of the multi-functional filter box. The function of both the pressing structure 36 and the pressing structure 35 is to make the filter cotton sheet adhere as tightly as possible to the surface of the top cover 32 of the filter box, so as to prevent moisture in the air from entering the filter box 33 through the gap between the filter cotton 31 and the top cover 32, thus affecting the protective effect of the filter box 33.

[0036] Example 4 like Figure 8 As shown, this embodiment discloses a fourth type of downhole protective filter box structure with water filtration function. It is a disc-shaped dust filter box with an internal water filtration protection structure consisting of a filter cotton material layer and a second front-end water filter membrane 42 and a second rear-end water filter membrane 41 disposed on both surfaces of the filter cotton material layer. The filter cotton material layer specifically includes a non-woven fabric layer, a glass fiber layer, or a meltblown fabric layer, etc., each with unique filtration performance, which can effectively intercept dust, particulate matter, and other impurities in the air. The second front-end water filter membrane 42 and the second rear-end water filter membrane 41 further enhance the functionality of the dust filter box. These two water filter membranes are tightly fixed at corresponding positions between the first disc 44 and the second disc 45 by stitching, wrapping the internal filter cotton material layer, thereby forming a relatively closed filtration system with multiple protections. The main function of the second front-end water filter membrane 42 and the second rear-end water filter membrane 41 is to filter out water vapor in the air, prevent moisture from penetrating into the internal filter cotton material layer, and avoid the filter cotton sheet from reducing filtration efficiency or even being damaged due to moisture. This design not only effectively protects the internal filter cotton material layer but also significantly extends the service life of the dust collection box, ensuring stable filtration performance under various complex environmental conditions and providing operators with a more reliable and durable filtration effect. A filter box latch 43 is located at the center of the second disc 45; the first disc 44 and the second disc 45 are connected via the filter box latch 43.

[0037] In humid environments, ordinary filter boxes often struggle to prevent the intrusion of external moisture, causing their internal components to easily become damp. This dampness not only affects the performance and quality of the components but can also lead to damage, thus shortening their lifespan. However, the downhole protective filter box structure with water filtration function disclosed in this invention, with its unique waterproof structure and waterproof membrane, effectively prevents moisture from entering the filter box. This design provides a dry and stable environment for the components inside the filter box, ensuring they remain in good condition. The waterproof structure provided by this invention not only protects the dryness and integrity of the internal components but also significantly extends their service life, making it particularly suitable for humid, rainy, or other high-humidity operating scenarios, providing more reliable protection for operators.

[0038] In practical use, ordinary filter cartridges often face the problem of decreased protective quality, mainly because they cannot effectively prevent external moisture and impurities from entering the cartridge. However, the protection inside the filter cartridge is also easily overlooked. Especially in some special scenarios, moisture exhaled by workers during operation can enter the filter cartridge from the inside. This moisture intrusion can also damage the filter media and equipment inside the cartridge, and may even lead to a decrease in the performance or failure of the filter media. This invention features a specially designed protective membrane for the inside of the filter cartridge. This membrane effectively prevents moisture from entering the cartridge from the inside, thus providing an extra layer of protection for the filter media and equipment inside, significantly improving the protective performance of the cartridge, extending the service life of the filter media, and providing more reliable protection for the safety of workers and the stable operation of equipment.

[0039] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A downhole protective filter box structure with water filtration function, characterized in that, It includes a water filtration protection structure, a water filtration protection structure shell, and a connecting structure; the water filtration protection structure shell includes a baffle (11) and a front shell; the baffle (11) and the front shell are connected by the connecting structure, and a gap is left between the baffle (11) and the front shell; the water filtration protection structure is set in the gap between the baffle (11) and the front shell.

2. The downhole protective filter box structure with water filtration function according to claim 1, characterized in that, The water filtration protection structure includes a first front-end water filtration membrane (14) and a first rear-end water filtration membrane (15) stacked on top of each other; the first rear-end water filtration membrane (15) is disposed close to the front shell; the first front-end water filtration membrane (14) is disposed close to the baffle (11); the first front-end water filtration membrane (14) and the first rear-end water filtration membrane (15) are both electrospun film layers; the electrospun film layer is composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

3. The downhole protective filter box structure with water filtration function according to claim 1, characterized in that, The connection structure includes a connecting part (12) and a buckle (13); the connecting part (12) is disposed at both ends of the baffle (11) and the front shell; the buckle (13) is engaged inside the connecting part (12) to connect the baffle (11) and the front shell; the surface of the front shell is provided with a vent hole (17); the surface of the vent hole (17) is provided with a fence structure; The upper end of the baffle (11) is connected and fixed with a connecting buckle (18) between the filter cotton protective shell and the face mask; the connecting buckle (18) between the filter cotton protective shell and the face mask is provided with an internal filter (16).

4. A downhole protective filter box structure with water filtration function, characterized in that, It includes a water filtration protection structure and a filter box; the filter box includes an upper top cover (21) and a lower top cover (24); the upper top cover (21) and the lower top cover (24) are connected to each other, and the water filtration protection structure is disposed between the upper top cover (21) and the lower top cover (24).

5. The downhole protective filter box structure with water filtration function according to claim 4, characterized in that, The water filtration protection structure includes a protective layer (211), filter cotton (22), and filter box membrane (23); the protective layer (211), filter cotton (22), and filter box membrane (23) are stacked between the upper cover (21) and the lower cover (24) of the filter box; the lower cover (24) of the filter box has a filter cotton slot (26) inside; the filter cotton (22) and the filter box membrane (23) are simultaneously secured inside the protective layer (211) and the filter cotton slot (26).

6. The downhole protective filter box structure with water filtration function according to claim 5, characterized in that, The filter cotton (22) is a HEPA structure filter cotton; an exhalation channel (25) is provided at the edge of the top cover (21) of the filter box.

7. A downhole protective filter box structure with water filtration function, characterized in that, It includes a water filtration protection structure and a filter cartridge (33); the filter cartridge (33) includes an upper cover (32) and a filter cotton protective cover (34), the upper cover (32) and the filter cotton protective cover (34) are connected to each other, and the water filtration protection structure is disposed between the upper cover (32) and the filter cotton protective cover (34).

8. A downhole protective filter box structure with water filtration function according to claim 7, characterized in that, The inner wall of the filter cotton protective cover (34) is provided with a pressing structure (35); the water filtration protection structure includes a dust filter cotton (31) and a dust and toxic filter box and a water filtration membrane disposed on both surfaces of the dust filter cotton (31); The inner wall of the top cover (32) is provided with a tight structure (36); the dust and toxic filtration box water filter membrane is an electrospun film layer, which is composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

9. A downhole protective filter box structure with water filtration function, characterized in that, It includes a water filtration protection structure and a disc structure; the water filtration protection structure is disposed inside the disc structure; the disc structure includes a first disc (44) and a second disc (45) connected to each other; the water filtration protection structure is disposed between the first disc (44) and the second disc (45).

10. A downhole protective filter box structure with water filtration function according to claim 9, characterized in that, The water filtration protection structure includes a filter cotton material layer and a second front-end water filtration membrane (42) and a second rear-end water filtration membrane (41) disposed on both surfaces of the filter cotton material layer; a filter box buckle (43) is provided at the center of the second disc (45); the first disc (44) and the second disc (45) are connected by the filter box buckle (43); The second front-end filter membrane (42) and the second rear-end filter membrane (41) are both electrospun film layers, which are composed of a non-woven fabric material layer and an organic fiber material layer on its surface.

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