HIRF protection device

Abstract

The utility model belongs to the technical field of airplanes, and discloses an HIRF protection device which comprises a flexible protection net and a pressing plate, the flexible protection net covers an open pore structure and is provided with a penetrating structure for a penetrating structure to penetrate through, the pressing plate is arranged on the side, away from the open pore structure, of the flexible protection net and is connected with the portion provided with the open pore structure, and the pressing plate is arranged on the side, away from the open pore structure, of the flexible protection net. The pressing plate is provided with an avoiding structure communicating with the penetrating structure. After the penetrating structure penetrates through the flexible protective net and the open pore structure, the flexible protective net covering the open pore structure can fill holes of different shapes formed after the penetrating structure penetrates through the open pore structure, so that the holes allowing electromagnetic waves to penetrate through are reduced, the area for shielding the electromagnetic waves is increased, the electromagnetic waves are prevented from entering the structure, and the electromagnetic wave shielding effect is improved. And the protective net is fixed through the pressing plate, the overall rigidity of the flexible protective net is enhanced, and the situation that the protective net deviates from the protective position due to the influence of airflow, and the protective effect is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft, especially to a HIRF protection device. BACKGROUND

[0002] Electromagnetic wave is an inevitable interference factor in the operation of civil aircraft, from tens of hertz low frequency electromagnetic wave to tens of thousands of hertz high frequency electromagnetic wave, the high intensity radiation field generated by them can cause electromagnetic interference to aircraft system equipment, and affect the flight safety of the aircraft.

[0003] At present, the high intensity radiation field (High-Intensity Radiated Field, HIRF for short) protection design carried out for each system equipment of civil aircraft generally adopts the following two ways, one is to carry out protection design on the equipment itself, such as increasing electromagnetic shielding protection cover, and the other is to form a relatively closed space by using the metal structure of the aircraft body around the position where the equipment is located, to realize the effect of electromagnetic shielding.

[0004] However, there are openings in the aircraft interior for other structures or pipeline systems to pass through, for such opening parts, since it is impossible to realize closure, it is impossible to effectively realize the shielding of electromagnetic waves, and electromagnetic waves are easy to enter the structure interior to reach the equipment, thereby interfering with the normal work of the equipment. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a HIRF protection device, which has strong applicability, high matching degree and good protection.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A HIRF protection device is provided, which is used in the part of the aircraft interior provided with an opening structure, the opening structure is used for the passing structure in the aircraft to pass through, and the HIRF protection device comprises:

[0008] A flexible protection net, which is covered at the opening structure and is provided with a through structure for the passing structure to pass through;

[0009] A pressing plate, which is arranged at one side of the flexible protection net away from the opening structure, is detachably connected with the part provided with the opening structure, and is provided with an avoiding structure communicated with the through structure.

[0010] Optionally, the pressing plate comprises a plurality of splicing plates, each splicing plate is provided with an avoiding gap, and the plurality of splicing plates are spliced with each other to jointly form the avoiding structure communicated with the through structure.

[0011] Optionally, at least one weight-reducing structure is formed on each of the splicing plates.

[0012] Optionally, the weight-reducing structure is a through hole.

[0013] Optionally, each of the splicing plates is a circular arc structure at the inflection point.

[0014] Optionally, the gap is formed between the avoiding structure and the passing structure.

[0015] Optionally, the HIRF protection device further comprises a plurality of fixing members, each of the fixing members comprises a head portion and a rod portion, the head portion is abutted against one side of the pressing plate away from the flexible protection net, and the rod portion is sequentially penetrated through the pressing plate, the flexible protection net and a portion provided with the opening structure to be connected.

[0016] Optionally, the HIRF protection device further comprises a plurality of connecting members corresponding to the fixing members, the connecting members are provided with threaded holes, and are arranged on one side of the portion provided with the opening structure away from the flexible protection net, the pressing plate is provided with a plurality of first connecting through holes corresponding to the fixing members, the flexible protection net is provided with a plurality of second connecting through holes corresponding to the first connecting through holes, the portion provided with the opening structure is provided with a plurality of third connecting through holes corresponding to the second connecting through holes, the rod portion is provided with external threads, and the rod portion is sequentially penetrated through the first connecting through holes, the second connecting through holes and the third connecting through holes, and is threadedly connected with the threaded holes of the connecting members.

[0017] Optionally, the flexible protection net is a high-density copper net.

[0018] The HIRF protection device has the advantages that:

[0019] The HIRF protection device has the advantages that: the flexible protection net is arranged, and a through structure is formed on the flexible protection net, so that the flexible protection net covering the opening structure can fill the different-shaped apertures formed after the passing structure passes through the opening structure, the apertures through which the electromagnetic wave passes are reduced, the area shielded from the electromagnetic wave is increased, the electromagnetic wave is prevented from entering the structure, the protection effect on the equipment is improved, the pressing plate is arranged on one side of the flexible protection net away from the opening structure and is connected with the portion provided with the opening structure, the flexible protection net is fixed through the pressing plate, the overall rigidity of the flexible protection net is improved, the flexible protection net is prevented from deviating from the protection position due to the air flow, and the protection effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view of the HIRF protection device assembled according to the present application;

[0021] Figure 2 is the back view of the assembled HIRF protection device provided by the utility model;

[0022] Figure 3 is the structural schematic view of the flexible protection net in the HIRF protection device provided by the utility model;

[0023] Figure 4 is the structural schematic view of the splicing plate in the HIRF protection device of the utility model.

[0024] In the figure,

[0025] 100, through structure;

[0026] 1, flexible protection net;11, through structure;

[0027] 2, pressing plate;21, avoiding structure;22, splicing plate;221, avoiding gap;222, weight-reducing structure;223, arc structure;

[0028] 3, fixing part;

[0029] 4, connecting part. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0031] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on the surface of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the embodiments, the terms "upper", "lower", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0034] Electromagnetic waves are an inevitable interference factor in the operation of civil aircraft. From low-frequency electromagnetic waves of tens of hertz to high-frequency electromagnetic waves of tens of thousands of hertz, the high-intensity radiation field generated by them can cause electromagnetic interference to aircraft system equipment and affect aircraft flight safety.

[0035] At present, the high-intensity radiation field (High-Intensity Radiated Field, HIRF for short) protection design for each system equipment of civil aircraft generally adopts the following two ways, one is to protect the equipment itself, such as adding an electromagnetic shielding protective cover, and the other is to use the metal structure of the aircraft body around the position where the equipment is located to form a relatively closed space to achieve the effect of electromagnetic shielding.

[0036] However, there are openings in the aircraft interior for other structures or pipeline systems to pass through. For such opening parts, since it is impossible to achieve closure, electromagnetic shielding cannot be effectively achieved, and electromagnetic waves are easy to enter the structure and reach the equipment, thereby interfering with the normal operation of the equipment.

[0037] Therefore, in order to meet the electromagnetic protection of different shaped pores formed after the passing structure passes through the opening structure, improve the applicability and matching degree of electromagnetic protection, and improve the protection effect, the utility model provides a HIRF protection device, which is used in the part of the aircraft interior provided with an opening structure, and the opening structure is used for the passing structure in the aircraft interior to pass through.

[0038] As Figures 1 to 4As shown, the HIRF protection device includes a flexible protection net 1 and a pressing plate 2, the flexible protection net 1 covers the opening structure and is provided with a through structure 11 for the passing structure 100 to pass through, the pressing plate 2 is arranged at the side of the flexible protection net 1 away from the opening structure and is detachably connected with the part provided with the opening structure, and the pressing plate 2 is provided with an avoiding structure 21 communicating with the through structure 11.

[0039] By arranging the flexible protection net 1 and the through structure 11 on the flexible protection net 1, after the passing structure 100 passes through the flexible protection net 1 and the opening structure, the flexible protection net 1 covering the opening structure can fill the different-shaped apertures formed after the passing structure 100 passes through the opening structure, thereby reducing the apertures available for the electromagnetic wave to pass through, increasing the area shielded from the electromagnetic wave, reducing the electromagnetic wave entering the structure, thereby improving the protection effect on the equipment, and by arranging the pressing plate 2 at the side of the flexible protection net 1 away from the opening structure and connecting the pressing plate 2 with the part provided with the opening structure, the flexible protection net 1 is fixed by the pressing plate 2, the overall rigidity of the flexible protection net 1 is strengthened, and the flexible protection net 1 is prevented from deviating from the protection position due to the influence of air flow, thereby affecting the protection effect.

[0040] In the embodiment, the part of the aircraft interior provided with the opening structure can be a separate plate or a connection interface of multiple structures, and the actual position is determined according to the arrangement mode of the passing structure 100, wherein the passing structure 100 can be a pipe system laid inside or a structure for connection or support of each part. Since the passing structure 100 has various types and irregular shapes, the size of the opening structure needs to be greater than the shape size of the passing structure 100, thereby avoiding interference.

[0041] Optionally, as shown in the Figure 4 pressing plate 2 includes a plurality of splicing plates 22, each splicing plate 22 is provided with an avoiding notch 221, and the plurality of splicing plates 22 are spliced with each other to jointly form the avoiding structure 21 communicating with the through structure 11. Since the position of the part provided with the opening structure is uncertain and the passing structure 100 has various shapes, the plurality of splicing plates 22 are spliced, thereby facilitating the fixation of the flexible protection net 1 in different operating environments.

[0042] The shapes of the plurality of splicing plates 22 can be the same or different, and can be freely set according to the working conditions. In the embodiment, the pressing plate 2 is composed of two identical and symmetrically distributed semicircular splicing plates 22, and the number of splicing plates 22 is minimized to fix the flexible protection net 1, thereby making the connection operation more convenient.

[0043] Optionally, as shown in the Figure 4As shown, each splicing plate 22 is provided with at least one weight-reducing structure 222. By providing the weight-reducing structure 222 on the splicing plates 22, the weight of each splicing plate 22 is reduced. The shape of the weight-reducing structure 222 can be determined based on the specific shape of the splicing plates 22 and can be circular, rectangular, or diamond-shaped. In this embodiment, since the splicing plates 22 are semicircular in shape, the weight-reducing structure 222 can be configured as a sector.

[0044] Optionally, the weight-reducing structure 222 is a through hole. By providing the weight-reducing structure 222 in the form of a through hole on the splicing plate 22, the weight of the splicing plate 22 itself is reduced to the greatest extent, thereby achieving a lightweight design of the splicing plate 22.

[0045] Alternatively, as Figure 4 As shown, the inflection point of each splicing plate 22 is an arc structure 223. By setting each inflection point of the splicing plate 22 as an arc structure 223, the sharp parts on the splicing plate 22 are eliminated, thereby preventing the flexible protective net 1 from being scratched when the splicing plate 22 is used to fix the flexible protective net 1, thereby preventing the protection performance against electromagnetic interference from being reduced.

[0046] Optionally, a movable gap is provided between the avoidance structure 21 and the passing structure 100. Since, when the passing structure 100 is a system pipeline, there is a possibility that the system pipeline will vibrate due to external impact during flight, a movable gap is provided between the avoidance structure 21 and the passing structure 100 to avoid interference with the splicing plate 22 when the passing structure 100, which is a pipeline system, is displaced, thereby preventing safety hazards such as damage to the system pipeline and other safety hazards.

[0047] Alternatively, as Figure 1 As shown, the HIRF protection device further includes a plurality of fixing members 3, each of which includes a head and a rod. The head abuts against the side of the pressing plate 2 facing away from the flexible protective net 1, and the rod sequentially passes through the pressing plate 2 and the flexible protective net 1 to connect with the portion with the open structure. By abutting the heads of the plurality of fixing members 3 against the side of the pressing plate 2 facing away from the flexible protective net 1, and sequentially passing the rods of the plurality of fixing members 3 through the pressing plate 2 and the flexible protective net 1 to connect with the portion with the open structure, when the fixing members 3 connect the splicing plate 22 to the portion with the open structure, the flexible protective net 1 located between the splicing plate 22 and the portion with the open structure is fixed, thereby preventing the flexible protective net 1 from falling off.

[0048] Further, the HIRF protection device further comprises a plurality of connecting pieces 4 corresponding to the plurality of fixing pieces 3, the connecting pieces 4 are provided with threaded holes, and are arranged on the side of the opening structure away from the flexible protection net 1, the pressing plate 2 is provided with a plurality of first connecting through holes corresponding to the plurality of fixing pieces 3, the flexible protection net 1 is provided with a plurality of second connecting through holes corresponding to the first connecting through holes, the opening structure is provided with a plurality of third connecting through holes corresponding to the second connecting through holes, the rod portion is provided with external threads, and the rod portion is sequentially threaded through the first connecting through holes, the second connecting through holes and the third connecting through holes and is screwed with the threaded holes of the connecting pieces 4. By adopting the threaded connection mode, the detachable connection between the splicing plate 22 and the opening structure is realized, so that the splicing plate 22 is convenient to disassemble, and the splicing plate 22 is convenient to replace and maintain. In the embodiment, the fixing piece 3 is a bolt, and the connecting piece 4 is a nut.

[0049] Optionally, the flexible protection net 1 is a high-density copper net. By adopting the high-density copper net as the flexible protection net 1, on the one hand, the high-density copper net has high flexibility, so that the shape of the high-density copper net is convenient to change, and on the other hand, the high-density copper net has good electromagnetic shielding performance, so that the interference of electromagnetic waves on the equipment can be avoided.

[0050] In other embodiments, the flexible protection net 1 can also be an aluminum net or other materials having electromagnetic shielding function.

[0051] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A HIRF protection device, wherein the HIRF protection device is used at a location inside an aircraft where an open structure is provided, wherein the open structure is used for a passing structure (100) inside the aircraft to pass through, and wherein: The HIRF protection device comprises: A flexible protective net (1), the flexible protective net (1) covering the open hole structure and provided with a through structure (11) for the passing structure (100) to pass through; A pressure plate (2) is provided on a side of the flexible protective net (1) away from the open hole structure and is detachably connected to a portion where the open hole structure is provided. A avoidance structure (21) communicating with the through structure (11) is provided on the pressure plate (2).

2. The HIRF protection device according to claim 1, characterized in that The pressure plate (2) comprises a plurality of splicing plates (22), each of the splicing plates (22) being provided with an avoidance notch (221), and the plurality of splicing plates (22) being spliced ​​together so that the respective avoidance notches (221) collectively form the avoidance structure (21) communicating with the through structure (11).

3. The HIRF protection device according to claim 2, characterized in that: Each of the splicing plates (22) is provided with at least one weight-reducing structure (222).

4. The HIRF protection device according to claim 3, characterized in that: The weight-reducing structure (222) is a through hole.

5. The HIRF protection device according to claim 2, characterized in that: The inflection point of each splicing plate (22) is an arc structure (223).

6. The HIRF protection device according to claim 1, wherein: There is a movable gap between the avoidance structure (21) and the passing structure (100).

7. The HIRF protection device according to claim 1, wherein: The HIRF protection device further comprises a plurality of fixing members (3), each of the fixing members (3) comprising a head and a rod, the head abutting against a side of the pressing plate (2) facing away from the flexible protection net (1), and the rod sequentially passing through the pressing plate (2) and the flexible protection net (1) to be connected to a portion having the open hole structure.

8. The HIRF protection device according to claim 7, characterized in that: The HIRF protection device further comprises a connecting member (4) corresponding one-to-one to the plurality of fixing members (3); a threaded hole is provided on the connecting member (4) and is arranged on a side of the portion where the opening structure is provided, away from the flexible protection net (1); a first connecting through hole corresponding one-to-one to the plurality of fixing members (3) is provided on the pressing plate (2); a second connecting through hole corresponding to the first connecting through hole is provided on the flexible protection net (1); a third connecting through hole corresponding one-to-one to the second connecting through hole is provided at the portion where the opening structure is provided; the rod portion is provided with an external thread, and the rod portion passes through the first connecting through hole, the second connecting through hole and the third connecting through hole in sequence, and is threadedly connected to the threaded hole of the connecting member (4).

9. The HIRF protection device according to claim 1, wherein: The flexible protective net (1) is a high-density copper net.

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