Electromagnetic shielded door with ventilation grille

Abstract

This utility model relates to the field of ship outfitting technology and discloses an electromagnetic shielding door with a ventilation grille. It includes a door frame and a door leaf connected by hinges. A U-shaped groove is provided on the side of the door frame facing the door leaf, and springs are provided on the inner walls of both sides of the U-shaped groove. A blade is provided on the door leaf, and a ventilation window is provided on the door leaf. A ventilation panel is provided on the outer surface of the ventilation window, and a ventilation grille is provided in the ventilation window. A hollow waveguide assembly is provided inside the ventilation grille. The waveguide assembly is used to shield electromagnetic waves and form a smooth airflow. An openable air grille assembly is provided on the inner surface of the ventilation grille. A fireproof structure is provided between the waveguide assembly and the air grille assembly to seal the airflow in the event of a fire. The above-mentioned electromagnetic shielding door with a ventilation grille, while ensuring the normal shielding function of the door body, adds a ventilation grille, thus taking into account the requirements of electromagnetic shielding, fire prevention, and ventilation.

Description

Technical Field

[0001] This utility model relates to the field of ship outfitting technology, and in particular to an electromagnetic shielding door with a ventilation grille. Background Technology

[0002] To meet the electromagnetic shielding requirements in certain scenarios, ships are equipped with electromagnetic shielding doors. The door frame and door panels of these doors form a continuous current-carrying conductor, thus providing shielding. Existing electromagnetic shielding doors generally only provide shielding and basic locking functions, lacking ventilation and having a low fire resistance rating. This is because, under normal circumstances, shielding, ventilation, and fire resistance are difficult to achieve simultaneously. If ventilation windows are installed, these windows would inevitably become structural weak points, affecting the electromagnetic shielding effect and compromising the door's fire resistance continuity. Therefore, technical improvements are needed. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide an electromagnetic shielding door with a ventilation grille, which satisfies the functions of shielding and fire prevention while also taking into account ventilation requirements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electromagnetic shielded door with a ventilation grille includes a door frame and a door leaf connected by hinges. A U-shaped groove is provided on the side of the door frame facing the door leaf. Springs are provided on the inner walls of both sides of the U-shaped groove. A blade is provided on the door leaf. The blade is used to insert into the U-shaped groove and make contact with the springs on both sides when the door leaf is closed.

[0006] The door has a ventilation window, and the outdoor surface of the ventilation window is equipped with a ventilation panel. The ventilation window is equipped with a ventilation grille, and the ventilation grille is equipped with a hollow waveguide assembly. The waveguide assembly is used to shield electromagnetic waves and form an unobstructed air duct. The indoor surface of the ventilation grille is equipped with an air grille assembly that can be opened and closed. A fireproof structure is installed between the waveguide assembly and the air grille assembly. The fireproof structure is used to seal the air duct in the event of a fire.

[0007] As an alternative, the waveguide assembly includes several hexagonal cellular cells, which are used to reflect and absorb electromagnetic waves with wavelengths larger than the size of the cellular cells.

[0008] As an alternative, the fireproof structure includes a fireproof frame arranged perpendicular to the air duct. The fireproof frame is provided with several mounting slots arranged in rows or columns at intervals. Expanded graphite fireproof strips are installed in the mounting slots. The expanded graphite fireproof strips are used to rapidly expand and fill the gaps in the fireproof frame when a fire occurs.

[0009] As an alternative, one side of the fireproof frame abuts against the waveguide assembly, while the other side of the fireproof frame is fitted with a mosquito net.

[0010] As an optional solution, the ventilation grille assembly includes a fixed plate, a movable plate, and a switch handle. The fixed plate is fixed to the surface of the ventilation grille, and the movable plate is slidably disposed in the ventilation grille and abuts against the fixed plate. The fixed plate has several first through holes, and the movable plate has several second through holes. The switch handle is fixedly connected to the movable plate and passes through the fixed plate. The fixed plate has a limiting groove to restrict the movement of the switch handle. The switch handle is used to drive the movable plate to switch between a first position and a second position. When the movable plate is in the first position, the first through holes and the second through holes are aligned one by one, realizing the opening of the ventilation grille assembly; when the movable plate is in the second position, the first through holes and the second through holes are misaligned one by one, realizing the closing of the ventilation grille assembly.

[0011] As an alternative, sliders are provided inside the ventilation grille at the upper and lower ends of the movable plate, and guide grooves are provided on the sliders to limit the movable plate.

[0012] As an alternative, the ventilation panel has downward-sloping louvers.

[0013] As an alternative, both the door frame and the door leaf are welded from stainless steel plates, the interior of the door leaf is filled with ceramic wool, and the interior surface of the door leaf is fitted with a fireproof board.

[0014] The beneficial effects of this utility model are:

[0015] This electromagnetic shielded door with ventilation grille, while ensuring the normal shielding function of the door body, adds a ventilation grille. The ventilation grille is equipped with a waveguide assembly that can shield electromagnetic waves and form an unobstructed air duct, as well as a fireproof structure that can seal the air duct in the event of a fire. It is also equipped with a grille assembly that can be opened and closed as needed, thus taking into account the requirements of electromagnetic shielding, fire prevention and ventilation, ensuring the functionality and protection of the door body, and making it suitable for more application occasions. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of the electromagnetic shielded door with ventilation grille provided in this embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Sectional view at point AA;

[0018] Figure 3 yes Figure 1 Sectional view at point BB;

[0019] Figure 4 yes Figure 2 Enlarged view at point C;

[0020] Figure 5 yes Figure 3 Enlarged view of point D in the middle.

[0021] In the attached image:

[0022] 1. Door frame; 11. U-shaped groove; 12. Spring;

[0023] 2. Door leaf; 21. Insert knife; 22. Ventilation window; 23. Ventilation panel; 231. Louvered window; 24. Stainless steel plate; 25. Ceramic wool; 26. Fireproof board;

[0024] 3. Ventilation grille; 31. Waveguide assembly; 32. Ventilation grille assembly; 321. Fixing plate; 322. Movable plate; 323. Switch handle; 324. First through hole; 325. Second through hole; 326. Limiting groove; 327. Slider; 328. Guide groove; 33. Fireproof structure; 331. Fireproof frame; 332. Mounting groove; 333. Expanded graphite fireproof strip; 34. Mosquito net. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0030] Please see Figures 1 to 5 As shown, this embodiment provides an electromagnetic shielded door with a ventilation grille, including a door frame 1 and a door leaf 2 connected by hinges. A U-shaped groove 11 is provided on the side of the door frame 1 facing the door leaf 2. Springs 12 are provided on the inner walls of both sides of the U-shaped groove 11. A insert 21 is provided on the door leaf 2. The insert 21 is used to insert into the U-shaped groove 11 when the door leaf 2 is closed and to contact and conduct with the springs 12 on both sides.

[0031] A ventilation window 22 is provided on the door leaf 2. A ventilation panel 23 is provided on the outdoor surface of the ventilation window 22. A ventilation grille 3 is provided in the ventilation window 22. A waveguide assembly 31 with a hollow structure is provided inside the ventilation grille 3. The waveguide assembly 31 is used to shield electromagnetic waves and form an unobstructed air duct. A wind grille assembly 32 that can be opened and closed is provided on the indoor surface of the ventilation grille 3. A fireproof structure 33 is provided between the waveguide assembly 31 and the wind grille assembly 32. The fireproof structure 33 is used to seal the air duct in the event of a fire.

[0032] Therefore, while ensuring the normal shielding function of the door, a ventilation grille 3 is added. The ventilation grille 3 is equipped with a waveguide assembly 31 that can shield electromagnetic waves and form an unobstructed air duct, and a fireproof structure 33 that can seal the air duct in the event of a fire. It is also equipped with a grille assembly 32 that can be opened and closed as needed, thus taking into account the requirements of electromagnetic shielding, fire prevention and ventilation, ensuring the functionality and protection of the door, and making it suitable for more usage occasions.

[0033] Optionally, the waveguide assembly 31 includes a plurality of hexagonal cellular cells, which are used to reflect and absorb electromagnetic waves with wavelengths larger than the size of the cellular cells.

[0034] Therefore, the waveguide array composed of individual cellular units can reflect / absorb electromagnetic waves with wavelengths larger than the aperture, achieving efficient electromagnetic shielding, preventing external electromagnetic interference from entering the internal space, and avoiding internal signal leakage. It is suitable for places with high electromagnetic compatibility requirements (such as computer rooms and shielded rooms). At the same time, compared with circular or square waveguides, the hexagonal structure has a larger ventilation area and lower airflow resistance under the same shielding effectiveness, thus optimizing the ventilation effect. In addition, the modular structure allows for flexible customization, maintaining lightweight and high mechanical strength, and facilitating installation and maintenance.

[0035] Optionally, the fireproof structure 33 includes a fireproof frame 331 arranged perpendicular to the air duct. The fireproof frame 331 is provided with a number of mounting slots 332 arranged in rows or columns at intervals. Expanded graphite fireproof strips 333 are provided in the mounting slots 332. The expanded graphite fireproof strips 333 are used to rapidly expand and fill the gaps in the fireproof frame 331 when a fire occurs.

[0036] Among them, expanded graphite can expand 150 to 250 times when exposed to high temperatures (above 200°C), thereby filling the gaps, isolating oxygen and suffocating the flame. Its flame retardant efficiency far exceeds that of traditional materials, achieving rapid sealing and fire prevention. It is also environmentally friendly, safe, halogen-free, and non-toxic. In addition, the modular fireproof structure 33 is easy to maintain and replace, and can be customized flexibly. It is suitable for sealing irregular gaps, maximizing the coverage of ventilation paths and improving the efficiency of fireproof sealing.

[0037] Furthermore, one side of the fireproof frame 331 abuts against the waveguide assembly 31, and the other side of the fireproof frame 331 is provided with a mosquito net 34.

[0038] Thus, the fireproof frame 331 abuts against the waveguide assembly 31 on one side to ensure electromagnetic sealing, while the mosquito net 34 on the other side blocks insects and dust, while maintaining ventilation efficiency; in addition, the compact stacked design (waveguide assembly 31 - fireproof structure 33 - mosquito net 34) reduces the space occupied and is suitable for narrow installation environments.

[0039] Optionally, the ventilation grille assembly 32 includes a fixed plate 321, a movable plate 322, and a switch handle 323. The fixed plate 321 is fixed to the surface of the ventilation grille 3. The movable plate 322 is slidably disposed in the ventilation grille 3 and abuts against the fixed plate 321. The fixed plate 321 has a plurality of first through holes 324, and the movable plate 322 has a plurality of second through holes 325. The switch handle 323 is fixedly connected to the movable plate 322 and passes through the fixed plate 321. The fixed plate 321 has a limiting groove 326 that limits the movement stroke of the switch handle 323. The switch handle 323 is used to drive the movable plate 322 to switch between a first position and a second position. When the movable plate 322 is in the first position, the first through holes 324 and the second through holes 325 are aligned one by one, so that the ventilation grille assembly 32 is opened. When the movable plate 322 is in the second position, the first through holes 324 and the second through holes 325 are misaligned one by one, so that the ventilation grille assembly 32 is closed.

[0040] Therefore, by controlling the movable plate 322 through the switch handle 323, the alignment or misalignment of the first through hole 324 and the second through hole 325 can be adjusted, which can precisely adjust the ventilation volume or completely close the air duct to meet various ventilation requirements. In addition, the limit groove 326 limits the stroke of the switch handle 323 to avoid excessive operation that could cause structural damage, making it convenient to use.

[0041] Furthermore, within the ventilation grille 3, at the upper and lower ends of the movable plate 322, sliders 327 are respectively provided, and guide grooves 328 are provided on the sliders 327 for limiting the movable plate 322.

[0042] Therefore, the guide grooves 328 of the upper and lower sliders 327 ensure that the movable plate 322 moves smoothly without jamming, reducing friction noise, extending service life, and ensuring that the movable plate 322 fits tightly with the fixed plate 321, reducing air leakage and improving airtightness when closed.

[0043] Optionally, the ventilation panel 23 is provided with downward-sloping louvers 231.

[0044] Among them, the louvered window 231 is used to guide the airflow in a directional manner, improve heat dissipation efficiency, reduce eddy noise, and the downward tilted design can prevent liquid intrusion, reduce dust accumulation, maintain ventilation efficiency, and balance ventilation and concealment.

[0045] Optionally, both the door frame 1 and the door leaf 2 are welded from stainless steel plates 24, the interior of the door leaf 2 is filled with ceramic cotton 25, and the interior surface of the door leaf 2 is provided with a fireproof board 26.

[0046] Therefore, the combination structure of stainless steel plate 24, ceramic cotton 25 and fireproof plate 26 ensures the basic structural strength and fire resistance of the electromagnetic shielding door.

[0047] In summary, this electromagnetic shielding door with ventilation grille achieves a continuous conductive connection between the spring 12 on the door frame 1 and the insert 21 on the door leaf 2. When installed on a ship, the door frame 1 is also fully welded to the steel bulkhead, forming a shielding structure that provides effective protection. The door leaf 2 is filled with ceramic wool 25 and fireproof board 26, and fireproof strips are added around its outer edge to meet fire safety requirements. A ventilation grille 3 is installed on the door leaf 2, and its switch handle 323 can be opened and closed as needed to meet ventilation requirements. The ventilation grille 3 contains a waveguide assembly 31 and a fireproof structure 33, combining electromagnetic shielding and fire protection functions with ventilation. This multifunctional electromagnetic shielding door with ventilation grille can be used in complex areas and meets shipboard installation requirements, making it highly valuable for market promotion and application.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetically shielded door with a ventilation grille, comprising a door frame (1) and a door leaf (2) connected by hinges, characterized in that, A U-shaped groove (11) is provided on the side of the door frame (1) facing the door leaf (2). Springs (12) are provided on the inner walls of both sides of the U-shaped groove (11). A insert (21) is provided on the door leaf (2). The insert (21) is used to insert into the U-shaped groove (11) when the door leaf (2) is closed and to contact and communicate with the springs (12) on both sides. The door leaf (2) is provided with a ventilation window (22). The outdoor surface of the ventilation window (22) is provided with a ventilation panel (23). A ventilation grille (3) is provided in the ventilation window (22). A hollow waveguide assembly (31) is provided inside the ventilation grille (3). The waveguide assembly (31) is used to shield electromagnetic waves and form a smooth air duct. A switchable air grille assembly (32) is provided on the indoor surface of the ventilation grille (3). A fireproof structure (33) is provided between the waveguide assembly (31) and the air grille assembly (32). The fireproof structure (33) is used to seal the air duct in the event of a fire.

2. The electromagnetic shielded door with ventilation grille according to claim 1, characterized in that, The waveguide assembly (31) includes a plurality of hexagonal cellular cells, which are used to reflect and absorb electromagnetic waves with wavelengths greater than the size of the cellular cells.

3. The electromagnetic shielded door with ventilation grille according to claim 1, characterized in that, The fireproof structure (33) includes a fireproof frame (331) arranged perpendicular to the air duct. The fireproof frame (331) is provided with a number of mounting slots (332) arranged in rows or columns at intervals. Expanded graphite fireproof strips (333) are provided in the mounting slots (332). The expanded graphite fireproof strips (333) are used to rapidly expand and fill the gaps of the fireproof frame (331) when a fire occurs.

4. The electromagnetic shielding door with ventilation grille according to claim 3, characterized in that, One side of the fireproof frame (331) abuts against the waveguide assembly (31), and a mosquito net (34) is provided on the other side of the fireproof frame (331).

5. The electromagnetic shielded door with ventilation grille according to claim 1, characterized in that, The ventilation grille assembly (32) includes a fixed plate (321), a movable plate (322), and a switch handle (323). The fixed plate (321) is fixed to the surface of the ventilation grille (3). The movable plate (322) is slidably disposed in the ventilation grille (3) and abuts against the fixed plate (321). The fixed plate (321) has a plurality of first through holes (324), and the movable plate (322) has a plurality of second through holes (325). The switch handle (323) is fixedly connected to the movable plate (322) and passes through the fixed plate (321). The fixed plate (321) has a limiting groove (326) that limits the movement of the switch handle (323). The switch handle (323) is used to drive the movable plate (322) to switch between a first position and a second position. When the movable plate (322) is in the first position, the first through hole (324) and the second through hole (325) are aligned one by one, so that the wind grating assembly (32) can be opened; When the movable plate (322) is in the second position, the first through hole (324) and the second through hole (325) are misaligned one by one, thereby closing the wind grating assembly (32).

6. The electromagnetic shielded door with ventilation grille according to claim 5, characterized in that, Slider (327) is provided inside the ventilation grille (3) and at the upper and lower ends of the movable plate (322), respectively. The slider (327) is provided with a guide groove (328) for limiting the movable plate (322).

7. The electromagnetic shielded door with ventilation grille according to claim 1, characterized in that, The ventilation panel (23) is provided with downward-sloping louvers (231).

8. The electromagnetic shielded door with ventilation grille according to claim 1, characterized in that, The door frame (1) and the door leaf (2) are both welded from stainless steel plates (24). The interior of the door leaf (2) is filled with ceramic cotton (25), and the interior surface of the door leaf (2) is provided with a fireproof board (26).

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