Anechoic chamber shielding door based on electromagnetic shielding sealing structure

Abstract

The utility model relates to the technical field of electromagnetic shielding, in particular to an anechoic chamber shielding door based on an electromagnetic shielding sealing structure, which comprises a shielding chamber, an anechoic chamber is formed in the shielding chamber through an anechoic chamber partition plate, and an anechoic chamber shielding door is mounted on the anechoic chamber partition plate; the radio-wave room shielding door comprises a shielding door body and wave-absorbing cotton, an insulating wood plate is arranged in the shielding door body, and ferrite and conductive aluminum foil are arranged between the insulating wood plate and the wave-absorbing cotton. The anechoic chamber shielding door is arranged on the anechoic chamber partition plate through a hinge. The shielding door of the shielding door radio-wave chamber is relatively independent and embedded in the side face of the steel plate, the unique design of double blades and three springs is adopted, the wave-absorbing cotton has good scattering and isolation attenuation performance under the conditions of vertical incidence and oblique incidence, and the ferrite has the same physical performance characteristic as an externally-installed ceramic tile and is high in shielding performance. The reed on the door is fixed by screws, and the hinge type pneumatic door is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to a shielding door for an anechoic chamber, in particular to a shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure, belonging to the technical field of electromagnetic shielding. Background Art

[0002] Electromagnetic shielding technology is an important part of electromagnetic compatibility technology and the most effective means to suppress radiation interference. When building cabinets, shielding rooms, communication cabins, and microwave darkrooms, shielding doors are the main path of electromagnetic leakage and the main factor determining the performance of shielding rooms.

[0003] In addition, the electromagnetic shielding door is the most critical shielding component of the shielding equipment and is the main channel for staff and equipment to enter and exit. The existing shielding door has a poor shielding effect on the shielding wall because the existing shielding door is only assembled by iron sheets and filled with wood chips, sponges and other materials. Once the outer door body is oxidized, it is difficult to play a shielding role, resulting in a greatly reduced shielding effect.

[0004] Therefore, it is urgent to improve the shielding door of the anechoic chamber to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a shielding door for an electromagnetic wave darkroom based on an electromagnetic shielding sealing structure. The shielding door is relatively independent and is embedded in the side of a steel plate. It uses a unique design of double knives and three springs. The absorbing cotton has good scattering and isolation attenuation performance under conditions of vertical incidence and oblique incidence. The ferrite has the same physical performance characteristics as the external ceramic tile and has high shielding performance. The reeds on the door are fixed with screws. The hinged pneumatic door is easy to maintain.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] A shielded door for an anechoic chamber based on an electromagnetic shielding sealing structure, comprising a shielded door for an anechoic chamber installed on a shielded chamber, characterized in that an anechoic chamber is formed inside the shielded chamber through an anechoic chamber partition, and the shielded door for the anechoic chamber is installed on the anechoic chamber partition;

[0008] The radio wave room shielding door comprises a shielding door body and absorbing cotton fixedly arranged on the inner side of the shielding door body, an insulating wooden board is fixedly arranged inside the shielding door body, ferrite and conductive aluminum foil are fixedly arranged between the insulating wooden board and the absorbing cotton, the ferrite is fixedly connected to the absorbing cotton, and the conductive aluminum foil is fixedly connected to the insulating wooden board;

[0009] The shielding door of the radio wave room is rotatably arranged on the partition of the radio wave darkroom through a hinge. The partition of the radio wave darkroom 8 is composed of a galvanized steel plate with a thickness of 2 mm. The surface of the steel plate is sprayed with plastic to protect it from the influence of environmental temperature and humidity.

[0010] Preferably, the radio wave room shielding door is arranged on the outer side of the shielding room, and a plurality of springs are fixedly arranged on one side of the radio wave room shielding door, and the springs are fixedly connected to the hinges by bolts;

[0011] An electronic door lock is installed on a side of the radio wave room shielding door away from the reed.

[0012] Preferably, the shielding room comprises a keel frame, the keel frame comprises a vertical keel frame and a horizontal keel frame, and the vertical keel frame and the horizontal keel frame are fixedly connected by welding;

[0013] The insulating wooden board is fixedly connected to the shielding door body through a vise.

[0014] Preferably, a galvanized steel plate is fixedly provided on the inner side of the keel frame, sound-absorbing cotton is fixedly provided on the inner side of the galvanized steel plate, conductive pads are fixedly provided between several of the galvanized steel plates, and the outer side of the galvanized steel plate is sprayed with plastic.

[0015] Preferably, the galvanized steel plate is fixedly connected to the keel frame by screws, the bottom of the galvanized steel plate is connected to the ground by a thick rubber pad, and an insulating plate is fixedly arranged between the sound-absorbing cotton and the galvanized steel plate.

[0016] Preferably, the galvanized steel plate is embedded in the inner side of the keel frame, and a plurality of ventilation waveguide windows are arranged on the upper galvanized steel plate, and the ventilation waveguide windows are connected to the interior of the shielding room.

[0017] Preferably, the anechoic chamber partition is fixedly arranged inside the shielding room and fixedly connected to the galvanized steel plate.

[0018] Preferably, a shielding room door body is provided on one side of the shielding room, a rain shelter is fixedly provided just above the shielding room door body, and a stainless steel sheet is fixedly provided on the upper side of the rain shelter.

[0019] The utility model has at least the following beneficial effects:

[0020] 1. Shielding door The shielding door of the radio room is relatively independent and embedded in the side of the steel plate. It adopts a unique design of double knives and three springs. The absorbing cotton has good scattering and isolation attenuation performance under conditions of vertical incidence and oblique incidence. The ferrite has the same physical properties as the external tiles and has high shielding performance. The reeds on the door are fixed with screws. It is a hinged pneumatic door for easy maintenance.

[0021] 2. The external keel frame adopts a self-supporting structure and does not require additional support from the parent building, ensuring that the structural design is light, safe and strong, and that the manufacturing and installation accuracy is guaranteed. All steel surfaces are painted with anti-rust paint and then blue paint. The vertical keel frame is fixed to the ground with expansion screws and is isolated from the ground by insulating boards and insulating sleeves for easy construction and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 This is a cross-sectional view of the door body of the utility model;

[0024] Figure 2 It is a three-dimensional diagram of the utility model;

[0025] Figure 3 This is a structural diagram of the keel frame of the utility model;

[0026] Figure 4 It is a side view of the keel frame of the utility model.

[0027] In the figure, 1-shielding room, 3-shielding room door, 4-keel frame, 401-vertical keel frame, 402-horizontal keel frame, 5-galvanized steel plate, 6-rain shelter, 7-radio wave room shielding door, 701-reed, 702-electronic door lock, 703-wave absorbing cotton, 704-ferrite, 705-conductive aluminum foil, 706-insulating wooden board, 707-pliers, 708-shielding door, 8-anechoic chamber partition, 9-ventilation waveguide window. DETAILED DESCRIPTION

[0028] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] like Figure 1-Figure 4 As shown, the electromagnetic shielding sealing structure based on the anechoic chamber shielding door provided in this embodiment includes an anechoic chamber shielding door 7 installed on the shielding chamber 1, and the interior of the shielding chamber 1 forms an anechoic chamber through an anechoic chamber partition 8, and the anechoic chamber shielding door 7 is installed on the anechoic chamber partition 8;

[0030] The radio room shielding door 7 includes a shielding door body 708 and an absorbing cotton 703 fixedly arranged on the inner side of the shielding door body 708. An insulating wooden board 706 is fixedly arranged inside the shielding door body 708. The absorbing cotton 703 is a broadband absorber made of lightweight polyurethane foam plastic impregnated with carbon black, which is widely used for paving the inner walls of various darkrooms. Under the conditions of vertical incidence and oblique incidence, it has good broadband performance, and also has good scattering and isolation attenuation performance, which is suitable for various parts in the darkroom. This material has various heights to meet different technical requirements. Composite polyurethane absorbing cotton 703 is used in the shielding room 1, which is installed on the surface of the ferrite 704 in a hanging manner. It is not easy to fall off and is easy to disassemble. The use of glue is avoided during the installation process, which can effectively ensure the air quality in the darkroom. 6 and the absorbing cotton 703 are fixedly provided with ferrite 704 and conductive aluminum foil 705. The ferrite 704 is fixedly connected to the absorbing cotton 703. The ferrite 704 absorbing material is an electromagnetic wave absorbing material that utilizes the magnetic resonance loss of the ferrite 704. This ferrite 704 absorbing material is sintered at a high temperature of more than 1000 degrees, and its physical properties have the same characteristics as those of external ceramic tiles. In order to attenuate electromagnetic waves in the low-frequency part, this type of ferrite block is used, which is connected to the dielectric material on the wall and top of the darkroom with screws. The surface is flat and easy to disassemble. The ferrite 704 is installed in a staggered manner. All ferrites 704 have six sides that are precisely ground. The installation can ensure that the spacing between adjacent ferrites is less than 0.1mm, and there is no long gap longer than 10cm in the vertical direction. The conductive aluminum foil 705 is fixedly connected to the insulating wooden board 706;

[0031] The shielding door 7 of the radio wave room is rotatably arranged on the partition plate 8 of the radio wave darkroom through a hinge. The partition plate 8 of the radio wave darkroom is composed of a galvanized steel plate with a thickness of 2 mm. The surface of the steel plate is sprayed with plastic to protect it from the influence of environmental temperature and humidity. The shielding door 7 of the radio wave room is arranged on the outer side of the shielding room 1. A plurality of reeds 701 are fixedly arranged on one side of the shielding door 7 of the radio wave room. The reeds are fixedly connected to the hinges through bolts. An electronic door lock 702 is installed on the side of the shielding door 7 of the radio wave room away from the reeds 701. The shielding door 7 of the radio wave room is relatively independent and is embedded in the side of the steel plate. It uses a unique design of double knives and three springs and has high shielding performance. The reeds on the door are fixed with screws for easy maintenance. The hinged pneumatic door has a password lock. When the power is off, the positioning device at the switch of the shielding door can be removed to manually close it.

[0032] Further, such as Figure 1 and Figure 3 As shown, the shielding room 1 includes a keel frame 4, and the keel frame 4 includes a vertical keel frame 401 and a horizontal keel frame 402, and the vertical keel frame 401 and the horizontal keel frame 402 are fixedly connected by welding;

[0033] The insulating wooden board 706 is fixedly connected to the keel frame 4 by means of a vise 707. The external keel frame 4 adopts a self-supporting structure and does not require additional support from the parent building, thereby ensuring that the structural design is light, safe and strong, and that the manufacturing and installation accuracy is ensured. All steel surfaces are painted with anti-rust paint and then blue paint. The vertical keel frame 401 is fixed to the ground with expansion screws and is isolated from the ground by insulating plates and insulating sleeves, which facilitates construction and adjustment.

[0034] In this embodiment, if Figure 1 As shown, the inner side of the keel frame 4 is fixedly provided with a galvanized steel plate 5, the inner side of the galvanized steel plate 5 is fixedly provided with sound-absorbing cotton, a conductive pad is fixedly provided between several galvanized steel plates 5, the outer side of the galvanized steel plate 5 is sprayed with plastic, the 2mm galvanized steel plate 5, the surface is sprayed with plastic, the high-quality conductive pad, the top frame, achieves high shielding performance;

[0035] In addition, the galvanized steel plate 5 is fixedly connected to the keel frame 4 by screws, the bottom of the galvanized steel plate 5 is connected to the ground through a thick rubber pad, and an insulating plate is fixedly arranged between the sound-absorbing cotton and the galvanized steel plate 5. A 2mm thick rubber pad is laid at the contact part between the galvanized steel plate 5 and the ground to play an insulating and moisture-proof role;

[0036] At the same time, the galvanized steel plate 5 is embedded in the inner side of the keel frame 4, and a plurality of ventilation waveguide windows 9 are arranged on the upper galvanized steel plate 5, which are connected with the interior of the shielding room 1, and are installed on the top. Each of the ventilation waveguide windows 9 has a size of 300mm×300mm, and the cutoff frequency of the ventilation waveguide window 9 is not less than 18GHz, and there is a good ventilation waveguide window with a connecting flange as an air inlet and outlet.

[0037] Further, if Figure 1 As shown, the anechoic chamber partition 8 is fixedly arranged inside the shielding room 1 and fixedly connected to the galvanized steel plate 5, thereby improving the overall stability of the shielding room 1. A shielding room door body 3 is arranged on one side of the shielding room 1, and a rain shelter 6 is fixedly arranged directly above the shielding room door body 3. A stainless steel sheet is fixedly arranged on the upper side of the rain shelter 6. The rain shelter 6 effectively shields the entrance door of the shielding room 1 to prevent rainwater from entering, thereby improving the convenience of use.

[0038] like Figure 1-Figure 4 As shown, the principle of the electromagnetic shielding sealing structure provided by the present embodiment is as follows:

[0039] The radio room shielding door 7 includes a shielding door body 708 and an absorbing cotton 703 fixedly arranged on the inner side of the shielding door body 708. An insulating wooden board 706 is fixedly arranged inside the shielding door body 708. Under the conditions of vertical incidence and oblique incidence, it has good broadband performance, and also has good scattering and isolation attenuation performance. It is installed on the surface of the ferrite 704 in a hanging manner, which is not easy to fall off and is easy to disassemble. The use of glue is avoided during the installation process, which can effectively ensure the air quality in the darkroom. The ferrite 704 is fixedly arranged between the insulating wooden board 706 and the absorbing cotton 703. The conductive aluminum foil 705, ferrite 704 and absorbing cotton 703 are fixedly connected. The ferrite 704 absorbing material is sintered at a high temperature of more than 1000 degrees. The physical properties have the same characteristics as the external ceramic tile. It is connected to the dielectric material on the wall and top of the darkroom with screws. The surface is flat and easy to disassemble. The ferrite 704 is installed in a staggered manner. All ferrites 704 have six sides that are precisely ground. The installation can ensure that the spacing between adjacent ferrites is less than 0.1mm, and there is no long gap longer than 10cm in the vertical direction. The conductive aluminum foil 705 is fixedly connected to the insulating wooden board 706;

[0040] The shielding door 7 of the radio wave room is rotatably arranged on the partition plate 8 of the radio wave darkroom through a hinge. The shielding door 7 of the radio wave room is arranged on the outer side of the shielding room 1. A plurality of reeds 701 are fixedly arranged on one side of the shielding door 7 of the radio wave room. The reeds are fixedly connected to the hinges through bolts. An electronic door lock 702 is installed on the side of the shielding door 7 of the radio wave room away from the reeds 701. The shielding door 7 of the radio wave room is relatively independent and embedded in the side of the steel plate. It adopts a unique design of double knives and three springs, with high shielding performance. The reeds on the door are fixed with screws, which is easy to maintain. The hinged pneumatic door has a password lock. When the power is off, the positioning device at the switch of the shielding door can be taken down to manually close it.

[0041] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0042] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0043] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure, comprising a shielding door (7) for an anechoic chamber installed on a shielding chamber (1), characterized in that: The interior of the shielding room (1) forms a darkroom through a darkroom partition (8), and the darkroom shielding door (7) is installed on the darkroom partition (8); The radio wave room shielding door (7) comprises a shielding door body (708) and absorbing cotton (703) fixedly arranged on the inner side of the shielding door body (708); an insulating wooden board (706) is fixedly arranged inside the shielding door body (708); a ferrite (704) and a conductive aluminum foil (705) are fixedly arranged between the insulating wooden board (706) and the absorbing cotton (703); the ferrite (704) is fixedly connected to the absorbing cotton (703); and the conductive aluminum foil (705) is fixedly connected to the insulating wooden board (706); The radio wave room shielding door (7) is rotatably arranged on the radio wave darkroom partition (8) through a hinge, and is composed of a galvanized steel plate with a thickness of 2 mm. The surface of the steel plate is sprayed with plastic to protect it from the influence of environmental temperature and humidity.

2. The electromagnetic shielding sealing structure-based shielding door for an anechoic chamber according to claim 1, characterized in that: The radio wave room shielding door (7) is arranged on the outer side of the shielding room (1), and a plurality of spring leaves (701) are fixedly arranged on one side of the radio wave room shielding door (7), and the spring leaves are fixedly connected to the hinges by bolts; An electronic door lock (702) is installed on the side of the radio wave room shielding door (7) away from the reed (701).

3. The electromagnetic shielding sealing structure-based shielding door for an anechoic chamber according to claim 1, characterized in that: The shielding room (1) comprises a keel frame (4), wherein the keel frame (4) comprises a vertical keel frame (401) and a horizontal keel frame (402), wherein the vertical keel frame (401) and the horizontal keel frame (402) are fixedly connected by welding; The insulating wooden board (706) is fixedly connected to the shielding door body (708) via a vise (707).

4. The shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure according to claim 3, characterized in that: The inner side of the keel frame (4) is fixedly provided with a galvanized steel plate (5), the inner side of the galvanized steel plate (5) is fixedly provided with sound-absorbing cotton, a conductive pad is fixedly provided between a plurality of the galvanized steel plates (5), and the outer side of the galvanized steel plate (5) is sprayed with plastic.

5. The shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure according to claim 4, characterized in that: The galvanized steel plate (5) is fixedly connected to the keel frame (4) by means of screws, the bottom of the galvanized steel plate (5) is connected to the ground by means of a thick rubber pad, and an insulating plate is fixedly arranged between the sound-absorbing cotton and the galvanized steel plate (5).

6. The shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure according to claim 5, characterized in that: The galvanized steel plate (5) is embedded in the inner side of the keel frame (4), and a plurality of ventilation waveguide windows (9) are provided on the upper side of the galvanized steel plate (5), and the ventilation waveguide windows (9) are connected to the interior of the shielding room (1).

7. The shielding door for an anechoic chamber based on an electromagnetic shielding sealing structure according to claim 6, characterized in that: The anechoic chamber partition (8) is fixedly arranged inside the shielding room (1) and is fixedly connected to the galvanized steel plate (5).

8. The electromagnetic shielding sealing structure-based shielding door for an anechoic chamber according to claim 1, characterized in that: A shielding room door (3) is provided on one side of the shielding room (1), a rain shelter (6) is fixedly provided directly above the shielding room door (3), and a stainless steel sheet is fixedly provided on the upper side of the rain shelter (6).

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