Inflatable air inlet channel plugging device

Abstract

The utility model discloses an inflatable air inlet channel plugging device which comprises an inflatable air bag, the inflatable air bag comprises a plurality of air bag units which are sequentially arranged in a stacked mode in the plugging direction of an air inlet channel, the adjacent air bag units are connected with each other, and the shape of each air bag unit is matched with the section of the air inlet channel. The inflatable air bag can be attached to all the side walls of the air inlet channel in the inflated state. The inflatable air bag is formed by stacking a plurality of air bag units, the size of the blocking side face of each air bag unit is reduced, the blocking side faces of the air bag units have small deformation radians when the air bag units are in the inflated state, and the contact area between the inflatable air bag and each side wall of the air inlet channel can be increased under the same air pressure. Therefore, the air inlet channel can be better sealed and blocked.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft maintenance equipment, specifically relating to an inflatable air intake sealing device. Background Technology

[0002] Aircraft engine air intakes serve as the air intake passages for the engine, providing it with the necessary air. During routine aircraft maintenance, these intakes need to be sealed to prevent foreign objects such as sand, rainwater, and small animals from entering the engine. Currently, inflatable airbags are used for sealing the intakes. During sealing, the airbags are inflated until they fit snugly against the side walls of the intake. When it's necessary to remove the airbags, they are deflated, facilitating easy removal and storage. However, due to the large cross-sectional dimensions of aircraft air intakes, using inflatable airbags presents the problem of inadequate sealing. Utility Model Content

[0003] The purpose of this invention is to provide an inflatable air intake sealing device to solve the problem of poor sealing effect of existing inflatable airbags.

[0004] This utility model is achieved through the following technical solution:

[0005] An inflatable air intake duct sealing device includes an inflatable airbag. The inflatable airbag includes multiple airbag units stacked sequentially along the air intake duct sealing direction. Adjacent airbag units are interconnected. The shape of each airbag unit matches the cross-section of the air intake duct, so that the inflatable airbag can fit against each side wall of the air intake duct when inflated.

[0006] In some embodiments, adjacent airbag units are interconnected, forming a connected structure inside the inflatable airbag.

[0007] In some embodiments, the airbag unit has a connecting hole on its side, and the connecting holes between adjacent airbag units are connected by a sealing tube.

[0008] In some embodiments, the airbag units are bonded together.

[0009] In some embodiments, an air nozzle is provided on the airbag unit facing the air inlet of the inflatable airbag.

[0010] In some embodiments, the contour of the sealing side of the airbag unit is configured to match the irregular curved surface of the air intake.

[0011] In some embodiments, an airbag cover is also included, wherein the inflatable airbag is disposed inside the airbag cover and the airbag cover is matched to the inflated airbag in the inflated state.

[0012] In some embodiments, an elastic layer is provided between the sealing side of the inflatable airbag and the airbag outer sleeve.

[0013] In some embodiments, a handle is provided on the side of the airbag cover facing the air intake.

[0014] In some embodiments, the inflatable airbag is connected to the airbag cover.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] This utility model of an inflatable airbag is composed of multiple stacked airbag units, which reduces the size of the sealing side of each airbag unit. This allows the sealing side of the airbag unit to have a smaller deformation arc when inflated. Under the same air pressure, it can increase the contact area between the inflatable airbag and each side wall of the air intake, thereby enabling better sealing of the air intake.

[0017] This sealing device is well-suited for air intakes of different shapes and sizes, is easy to store, and has excellent portability. Furthermore, by adding an airbag cover to the outside of the inflatable airbag, the airbag is protected, giving the sealing device better durability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the shape of an aircraft air intake.

[0020] Figure 2 This is a schematic diagram of the inflatable airbag structure of the sealing device according to an embodiment of this utility model.

[0021] Figure 3 for Figure 2 Schematic diagram of the AA-direction section.

[0022] Figure 4 for Figure 3 A partial schematic diagram of point B in the middle.

[0023] Figure 5 This is a schematic diagram of the inflatable airbag of the sealing device according to an embodiment of the present invention from another perspective.

[0024] Figure 6 This is a schematic diagram of the sealing device structure according to an embodiment of the present invention.

[0025] in:

[0026] 10. Air intake duct; 101. Air intake duct inlet; 102. Irregular curved surface;

[0027] 20. Inflatable airbag; 21. Airbag unit; 22. Air nozzle; 23. Connecting hole; 24. Sealing tube;

[0028] 30. Airbag cover; 31. Handle;

[0029] 40. Air pump;

[0030] 50. Signage. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0032] Reference Figure 1 The diagram shows the external structure of the aircraft air intake 10. Due to the large size of the aircraft air intake and the fact that one side is an irregular curved surface 102, the existing inflatable airbags usually adopt an integral structure. The inflatable airbag is large in size, and when the airbag is inflated, the deformation arc of the sealing side of the airbag is large. The sealing side of the airbag usually presents an outward convex arc surface, which causes the sealing sides of the inflatable airbag to not fit well with the side wall of the air intake. There is a certain gap between the airbag and the side wall of the air intake at the four corners. The sealing surface between the side of the inflatable airbag and the side wall of the air intake is small, and the inflatable airbag cannot provide an effective seal for the air intake.

[0033] In particular, when sealing off irregular curved surfaces of aircraft air intakes, although the sealing side profile of the inflatable airbag is prepared to match the irregular curved surface of the aircraft air intake, the sealing side will be difficult to match the irregular curved surface of the air intake after deformation when the airbag is inflated, which affects the sealing performance of the inflatable airbag.

[0034] This invention employs an inflatable airbag composed of multiple stacked airbag units. Under the same aircraft air intake size, the size of the sealing side of each airbag unit can be reduced. Under the same inflation pressure, the sealing side of the airbag unit has a smaller deformation curvature, allowing each sealing side of the inflatable airbag to better fit with the aircraft air intake, increasing the sealing contact area between the inflatable airbag and each side wall of the air intake, thereby improving the sealing performance of the sealing device.

[0035] Reference Figure 2 , Figure 3 and Figure 5 An inflatable air intake duct sealing device includes an inflatable airbag 20. The inflatable airbag 20 includes multiple airbag units 21 stacked sequentially along the air intake duct sealing direction. Adjacent airbag units 21 are interconnected. The shape of each airbag unit matches the cross-section of the air intake duct, so that the inflatable airbag can fit against each side wall of the air intake duct when inflated.

[0036] With a fixed intake duct thickness, using multiple stacked airbag units can reduce the thickness of the airbag units. Under the same conditions of other dimensions and air pressure, the deformation curvature of the airbag unit's sealing side will be reduced, and its sealing side can be closer to a plane. This allows for a better and more complete fit with the intake duct sidewall, thereby improving the sealing performance of the inflatable airbag.

[0037] The combined structure consisting of multiple airbag units reduces the volume of each airbag unit, which reduces the inflation pressure required for the airbag. This further reduces the deformation curvature of the sealing side under inflation and improves the fit between the airbag and the air intake.

[0038] The number of airbag units 21 depends on the thickness of the inflatable airbag and the sealing size of the air intake. Generally, the more airbag units there are, the smaller the sealing side size of the airbag unit, and the smaller the deformation curvature of the side of the airbag unit in the inflated state. Each airbag unit can be set to have the same thickness.

[0039] The airbag units 21 can be configured as independent closed structures, in which case each airbag unit needs to be inflated separately; or the adjacent airbag units can be configured to be interconnected, so that the interior of the inflatable airbag forms an overall interconnected structure, which facilitates the inflation of the inflatable airbag and can better ensure the consistency of the air pressure inside each airbag unit.

[0040] Reference Figure 3 and Figure 4 When adjacent airbag units are interconnected, a connecting hole 23 is provided on the side of the airbag unit 21. Adjacent airbag units are connected through the connecting hole. To ensure sealing performance, the connecting holes between adjacent airbag units are connected by a sealing tube 24. The sealing tube can be made of rubber. A flange for connecting to the sealing tube is provided on the connecting hole. The sealing tube and the flange are fixedly connected by adhesive or other connection methods to increase the sealing performance at the connection position.

[0041] Adjacent airbag units 21 can be bonded together, or other connection methods can be used to achieve a stable connection between the airbag units.

[0042] Reference Figure 5An air nozzle 22 is provided on the airbag unit 21 on the side of the airbag facing the air inlet 101 of the airbag 20. It is used for inflating and deflating the airbag. The nozzle is located on the non-sealing surface and will not affect the sealing performance of the airbag.

[0043] The airbag unit 21 can be made of TPU material, which has good structural strength and weather resistance, and can be well adapted to different air pressures and temperatures to meet the special usage requirements of different scenarios in the air intake; it has good sealing performance, is lightweight, and has a soft texture.

[0044] Reference Figure 2 and Figure 5 The contour of the sealing side of the airbag unit 21 is designed to match the irregular curved surface of the air intake. For this irregular curved surface, if the inflatable airbag adopts an integral structure, the sealing side will undergo significant deformation in the inflated state, especially at the two pointed ends, making it difficult to effectively seal the irregular curved surface of the air intake.

[0045] The inflatable airbag is composed of multiple airbag units. The sealing side of each airbag unit is small, resulting in minimal deformation of the irregularly shaped sealing side during inflation. This allows for excellent replication of the shape of the irregularly shaped curved surface, ensuring a good fit between the sealing side of the inflatable airbag and the irregularly shaped curved surface of the air intake. Furthermore, this modular structure better replicates various spatial irregularly shaped curved surfaces, and by dividing the spatial irregularly shaped curved surface into small-area unit curved surfaces, it facilitates the processing and shaping of the irregularly shaped sealing side of the airbag unit.

[0046] Reference Figure 6 In some embodiments, the sealing device further includes an airbag cover 30, within which the inflatable airbag 20 is disposed, and the airbag cover 30 matches the inflated airbag 20. The airbag cover can be made of a material with better structural strength, such as fabric, to provide effective protection for the inflatable airbag. For example, the airbag cover can be made of canvas, which has excellent durability and properties such as windproof, rainproof, sandproof, and abrasion-resistant, as well as excellent sealing performance.

[0047] When in use, the airbag cover can deform to the same shape as the inflated airbag, allowing the sealing device to deform to match the shape of the air intake.

[0048] Reference Figure 3An elastic layer, such as a sponge layer, is provided between the sealing side of the inflatable airbag and the airbag outer shell. When the airbag is inflated, the elastic layer adapts to the curvature of each side, utilizing its ability to deform under different pressures to effectively fill any gaps at the edges of each side, thereby further improving the sealing performance of the sealing device.

[0049] Reference Figure 6 A handle 31 is provided on the side of the airbag sleeve 30 facing the air intake to facilitate the installation and removal of the sealing device inside the air intake. An identification plate 50 can be hung on the handle 31 to distinguish whether the sealing device is used for the left or right air intake, thus facilitating the use of the sealing device.

[0050] The inflatable airbag 20 is connected to the airbag cover 30 to prevent misalignment between the inflatable airbag and the airbag cover when the airbag is not inflated. For example, the outer contour of the inflatable airbag can be connected to the outer contour of the airbag cover. In this case, the constraint provided by the airbag cover to the inflatable airbag can further reduce the deformation curvature of the side of the inflatable airbag.

[0051] An air pump 40 and an air hose are provided for the sealing device to inflate and deflate the airbag.

[0052] The sealing device occupies little space when stowed, requiring only 0.1m of space. 3 It is easy to carry, deploy quickly, and move. The device can be equipped with a pressure detection unit to detect the pressure of the inflatable airbag and prevent under-inflation or over-inflation.

[0053] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, 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.

[0054] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this utility model does not imply that the components are required to be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An inflatable air intake plugging device, characterized in that, The device includes an inflatable airbag, which comprises multiple airbag units stacked sequentially along the direction of the air intake duct blockage. Adjacent airbag units are interconnected, and the shape of each airbag unit matches the cross-section of the air intake duct, so that the inflatable airbag can fit snugly against each side wall of the air intake duct when inflated.

2. An inflatable air intake plugging device according to claim 1, wherein, Adjacent airbag units are interconnected, forming a connected structure inside the inflatable airbag.

3. An inflatable air intake plugging device according to claim 2, wherein, The airbag unit has a connecting hole on its side, and the connecting holes between adjacent airbag units are connected by a sealing tube.

4. An inflatable air intake plugging device according to claim 1, wherein, The airbag units are bonded together.

5. An inflatable air intake plugging device according to claim 2, wherein, An air nozzle is provided on the airbag unit facing the air inlet of the inflatable airbag.

6. An inflatable air intake plugging device according to claim 1, wherein, The contour of the side sealing the airbag unit is set to match the irregular curved surface of the air intake.

7. An inflatable air intake plugging device according to any one of claims 1-6, characterized in that, It also includes an airbag cover, the inflatable airbag being disposed inside the airbag cover, and the airbag cover being compatible with the inflatable airbag in the inflated state.

8. An inflatable air intake plugging device according to claim 7, wherein, An elastic layer is provided between the sealing side of the inflatable airbag and the airbag outer shell.

9. An inflatable air intake plugging device according to claim 7, wherein, A handle is provided on the side of the airbag cover facing the air intake.

10. An inflatable air intake plugging device according to claim 7, wherein, The inflatable airbag is connected to the airbag cover.

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