A flat aviation cable prepared from a modified polyimide

Abstract

The utility model discloses a kind of flat aviation cables prepared by modified polyimide, belong to the field of modified polyimide aviation cable, inner protective pipeline is installed in sheath cavity, inner sheath is installed in inner protective pipeline, the protection of aviation cable is realized by inner protective pipeline;Inner protective pipeline includes flat inner passage and arc-shaped elastic cover.Cable's outer sheath and inner sheath provide double protection, ensure its reliability and durability in extreme environment.Outer sheath resists physical and chemical damage, and the inner sheath provides additional protection and support for the cable core.The design of inner protective pipeline enhances cable protection, including flat inner passage and arc-shaped elastic cover, providing an additional protective layer, and providing cushioning and protection when subjected to external pressure or impact.The movable gap design of inner protective pipeline allows the arc-shaped elastic cover to compress and absorb impact forces, and the lateral support bars and fixed bars ensure the structural stability of the cable, maintaining the shape and performance of the cable.

Description

Technical Field

[0001] This utility model relates to the field of modified polyimide aviation cables, and particularly to a flat aviation cable made of modified polyimide. Background Technology

[0002] Modified polyimide aviation cables are high-performance wires and cables designed specifically for the aviation industry, aiming to meet the stringent requirements of aerospace equipment for wires and cables.

[0003] Modified polyimide, as an insulation material for cables, possesses a range of superior properties. Its long-term operating temperature range is typically between -269°C and +400°C, maintaining stable performance under extreme temperature conditions. Furthermore, modified polyimide also exhibits excellent electrical insulation properties, radiation resistance, chemical corrosion resistance, and outstanding mechanical strength.

[0004] Modified polyimide aviation cables are widely used in power transmission and signal control systems in the aerospace field. For example, in military aircraft, civil aircraft, satellites, rockets, and other equipment, modified polyimide aviation cables are used for internal wiring to ensure stable operation in harsh environments such as high temperature, strong radiation, and humidity. In addition, modified polyimide aviation cables also play a crucial role in shipbuilding, defense industry, oil exploration, nuclear energy, and rail transportation.

[0005] Although modified polyimide aviation cables widely use inner and outer sheaths to protect the cable core in practical applications, this protection mechanism still has performance deficiencies in the aviation environment.

[0006] Although modified polyimide materials themselves possess excellent high-temperature resistance, cables may face even greater temperature challenges in extreme aerospace environments, such as high-temperature, high-speed flight. If the temperature resistance of the inner and outer sheaths fails to meet requirements, it may lead to a decline in cable performance or even cause safety accidents.

[0007] During flight, aviation cables must withstand complex mechanical stresses, such as vibration, tension, and bending. If the mechanical strength of the inner and outer sheaths is insufficient, they may not be able to effectively resist these stresses, leading to cable sheath damage, exposure of the cable core, and affecting the normal use of the cable and flight safety. Utility Model Content

[0008] The main objective of this invention is to provide a flat aviation cable made of modified polyimide, which can effectively solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A flat aviation cable made of modified polyimide includes an outer sheath, a sheath cavity, an inner sheath, and a cable core, wherein the sheath cavity is located inside the outer sheath, and the cable core is installed in the inner sheath.

[0011] An inner protective conduit is installed in the sheath cavity, and the inner sheath is installed in the inner protective conduit to protect the aviation cable.

[0012] The inner protective conduit includes a flat inner channel and an arc-shaped elastic cover. The arc-shaped elastic cover is connected to both sides of the flat inner channel, and the interior of the flat inner channel forms a cable compartment for storing the inner sheath. A fixing strip is provided between the flat inner channel and the arc-shaped elastic cover, and lateral support strips are provided on the upper and lower end faces of the flat inner channel. The arc-shaped elastic cover and the lateral support strips increase the protection performance of the cable.

[0013] In a preferred embodiment of this application, the arc-shaped elastic cover has an internal cavity, and multiple stabilizing bars are installed in the cavity to increase the compressive strength of the arc-shaped elastic cover. An movable notch is formed between the arc-shaped elastic cover and the flat inner channel for the compression movement of the arc-shaped elastic cover.

[0014] In a preferred embodiment of this application, the lateral support bar, the flat inner channel, and the arc-shaped elastic cover are designed as a single unit. The cross-section of the arc-shaped elastic cover is "C"-shaped. One end of the arc-shaped elastic cover is connected to the flat inner channel, and the other end of the arc-shaped elastic cover is a free end. The end of the arc-shaped elastic cover is arc-shaped.

[0015] In a preferred embodiment of this application, multiple stabilizing bars are distributed in a ring within the cavity of the arc-shaped elastic cover, and the stabilizing bars are integrated with the arc-shaped elastic cover. Multiple lateral support bars are equidistantly distributed on the flat inner channel.

[0016] In a preferred embodiment of this application, the fixing strip is integrated with the arc-shaped elastic cover and the flat inner channel, and multiple fixing strips are distributed in a ring on the arc-shaped side end of the arc-shaped elastic cover. The fixing strips are aligned with the stabilizing strips.

[0017] In a preferred embodiment of this application, the cross-section of the flat inner channel is elliptical, the outer sheath is connected to the fixed end of the arc-shaped elastic cover by an adhesive, and the inner sheath is connected to the flat inner channel by an adhesive.

[0018] In a preferred embodiment of this application, the outer sheath, inner sheath, and inner protective pipe are all made of modified polyimide material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The outer and inner sheaths together provide dual protection for the cable, ensuring its reliability and durability in extreme environments. The outer sheath, as the outermost protective barrier, effectively resists physical and chemical damage from the external environment, such as abrasion and corrosion. The inner sheath, tightly wrapped around the cable core, provides additional protection and support, ensuring the stability and safety of the cable core.

[0021] The inner protective conduit design further enhances the overall protection of the cable. The inner protective conduit consists of a flat inner channel and an arc-shaped elastic shield. This design not only provides an extra layer of protection for the cable but also allows for better cushioning and protection when the cable is subjected to external pressure or impact. The arc-shaped elastic shield absorbs some of the impact force and increases compressive strength through its internal stabilizing bars, ensuring that the cable maintains its shape and function under external forces.

[0022] The movable notch design within the inner protective conduit allows the curved elastic shield to compress under pressure, further absorbing impact and protecting the cable from damage. Simultaneously, the design of the lateral support bars and fixing bars ensures the stability of the entire cable structure, allowing the cable to maintain its shape and performance during bending and movement. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is an exploded view of the overall structure of this utility model;

[0025] Figure 3 This is a front view of the inner protective pipe and cable core of this utility model;

[0026] Figure 4 This is a diagram illustrating the internal protective pipe of this utility model;

[0027] Figure 5 This is a cross-sectional view of the internal protective pipe of this utility model.

[0028] In the diagram: 1. Outer sheath; 2. Inner protective conduit; 21. Flat inner channel; 22. Lateral support bar; 23. Arc-shaped elastic cover; 24. Cavity; 25. Stabilizing bar; 26. Fixing bar; 27. Movable notch; 28. Cable compartment; 3. Inner sheath; 4. Cable core; 5. Sheath cavity. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] like Figure 1 - Figure 5 As shown, a flat aviation cable made of modified polyimide includes an outer sheath 1, a sheath cavity 5, an inner sheath 3, and a cable core 4. The outer sheath 1 has a sheath cavity 5 inside, while the cable core 4 is installed in the inner sheath 3, ensuring the stability and safety of the cable.

[0031] An inner protective conduit 2 is installed within the sheath cavity 5, and the inner sheath 3 is installed inside the inner protective conduit 2. This design provides an additional protective layer for the aviation cable through the inner protective conduit 2, thereby enhancing the overall protection capability of the cable.

[0032] The inner protective conduit 2 has a unique design, consisting of a flat inner channel 21 and an arc-shaped elastic cover 23. The arc-shaped elastic cover 23 connects to both sides of the flat inner channel 21, forming a cable compartment 28 capable of storing the inner sheath 3. A fixing strip 26 is installed between the flat inner channel 21 and the arc-shaped elastic cover 23 to ensure structural stability. Simultaneously, lateral support strips 22 are provided on the upper and lower end faces of the flat inner channel 21. These support strips, in conjunction with the arc-shaped elastic cover 23, further enhance the cable's protective performance.

[0033] The curved elastic shield 23 has an internal cavity 24, within which multiple stabilizing bars 25 are installed. These stabilizing bars 25 enhance the compressive strength of the curved elastic shield 23, ensuring that it maintains its shape and function under external pressure. Furthermore, a movable notch 27 is formed between the curved elastic shield 23 and the flat inner channel 21, allowing the curved elastic shield 23 to compress under pressure, thereby absorbing impact forces.

[0034] The lateral support bar 22, the flat inner channel 21, and the arc-shaped elastic cover 23 are designed as a single unit, which makes the entire structure more stable. The arc-shaped elastic cover 23 has a "C"-shaped cross-section, with one end connected to the flat inner channel 21 and the other end being a free end. The ends of the arc-shaped elastic cover 23 are designed to be arc-shaped to accommodate the bending and movement of the cable.

[0035] Stabilizing bars 25 are arranged in a ring within the cavity 24 of the arc-shaped elastic cover 23, and they are integrally designed with the arc-shaped elastic cover 23. Multiple lateral support bars 22 are equidistantly distributed on the flat inner channel 21, ensuring uniform support and cable stability.

[0036] The fixing strip 26, the arc-shaped elastic cover 23, and the flat inner channel 21 are also designed as a single unit. They are distributed in a ring on the arc-shaped side of the arc-shaped elastic cover 23 and are aligned with the stabilizing strip 25 to ensure the integrity of the structure and the fixation of the cable.

[0037] The flat inner channel 21 has an elliptical cross-section, which facilitates the installation of the cable core 4 and the overall flexibility of the cable. The outer sheath 1 is connected to the fixed end of the arc-shaped elastic cover 23 by adhesive, and the inner sheath 3 is also connected to the flat inner channel 21 by adhesive. This connection method is both strong and easy to install.

[0038] The outer sheath 1, inner sheath 3, and inner protective conduit 2 are all made of modified polyimide material. Modified polyimide material, due to its excellent heat resistance, mechanical strength, and electrical insulation properties, is suitable for manufacturing aviation cables, ensuring the reliability and durability of the cables in extreme environments.

[0039] Modified polyimide materials are prepared through chemical modification methods. This may include steps such as polymerization reactions, adding modifiers, and crosslinking agents to improve the heat resistance, mechanical strength, and electrical insulation properties of the polyimide. The modified polyimide material is then extruded to form an outer sheath 1. The outer sheath 1 has an internal cavity 5. The modified polyimide material is then extruded to form an inner protective conduit 2. The inner protective conduit 2 consists of a flat inner channel 21 and an arc-shaped elastic shield 23, with the arc-shaped elastic shield 23 connected to both sides of the flat inner channel 21. The modified polyimide material is then extruded to form an inner sheath 3. The inner sheath 3 is installed inside the inner protective conduit 2.

[0040] The inner sheath 3 is installed inside the inner protective conduit 2, ensuring that the cable core 4 is installed within the inner sheath 3. The outer sheath 1 is then connected to the inner protective conduit 2 using adhesive, and the inner sheath 3 is also connected to the flat inner channel 21 using adhesive. The prepared flat aviation cable is then installed in an aircraft or other required equipment. The cable core 4 is installed within the inner sheath 3, which is housed within the inner protective conduit 2, while the outer sheath 1 provides external protection.

[0041] During use, if the cable is subjected to external pressure or impact, the arc-shaped elastic shield 23 can absorb part of the impact force. Its internal stabilizing strip 25 increases compressive strength, ensuring the arc-shaped elastic shield 23 maintains its shape and function. The movable notch 27 formed between the arc-shaped elastic shield 23 and the flat inner channel 21 allows the arc-shaped elastic shield 23 to compress under pressure, further absorbing impact force. The lateral support strip 22 and fixing strip 26 ensure the stability of the entire cable structure. Their integrated design with the arc-shaped elastic shield 23 and the flat inner channel 21 ensures the cable remains stable during bending and movement. Regularly inspect the cable's integrity during use to ensure that all components (such as the outer sheath 1, inner sheath 3, inner protective conduit 2, etc.) are undamaged, guaranteeing the cable's stability and safety.

[0042] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flat aviation cable made of a modified polyimide, comprising an outer jacket (1), a jacket cavity (5), an inner jacket (3) and a cable core (4), the jacket cavity (5) being located inside the outer jacket (1), the cable core (4) being installed in the inner jacket (3), characterized in that: An inner protective pipe (2) is installed in the sheath cavity (5), and the inner sheath (3) is installed in the inner protective pipe (2). The protection of the aviation cable is achieved through the inner protective pipe (2). The inner protective conduit (2) includes a flat inner channel (21) and an arc-shaped elastic cover (23). The arc-shaped elastic cover (23) is connected to both sides of the flat inner channel (21), and a cable compartment (28) for storing the inner sheath (3) is formed inside the flat inner channel (21). A fixing strip (26) is provided between the flat inner channel (21) and the arc-shaped elastic cover (23), and lateral support strips (22) are provided on the upper and lower end faces of the flat inner channel (21). The protection performance of the cable is increased by the arc-shaped elastic cover (23) and the lateral support strips (22).

2. The flat aviation cable prepared from modified polyimide according to claim 1, characterized in that: The arc-shaped elastic cover (23) has a cavity (24) inside, and multiple stabilizing strips (25) are installed in the cavity (24). The stabilizing strips (25) increase the compressive strength of the arc-shaped elastic cover (23). An movable notch (27) is formed between the arc-shaped elastic cover (23) and the flat inner channel (21) for the compression of the arc-shaped elastic cover (23).

3. The flat aviation cable prepared from modified polyimide according to claim 2, characterized in that: The lateral support bar (22), the flat inner channel (21) and the arc-shaped elastic cover (23) are designed as a single unit. The cross-section of the arc-shaped elastic cover (23) is "C" shaped. One end of the arc-shaped elastic cover (23) is connected to the flat inner channel (21), and the other end of the arc-shaped elastic cover (23) is a free end. The end of the arc-shaped elastic cover (23) is arc-shaped.

4. The flat aviation cable prepared from modified polyimide according to claim 3, characterized in that: Multiple stabilizing bars (25) are distributed in a ring in the cavity (24) of the arc-shaped elastic cover (23). The stabilizing bars (25) and the arc-shaped elastic cover (23) are designed as a single unit. Multiple lateral support bars (22) are distributed at equal intervals on the flat inner channel (21).

5. A flat aviation cable prepared from modified polyimide according to claim 4, characterized in that: The fixing strip (26) is integrated with the arc-shaped elastic cover (23) and the flat inner channel (21). Multiple fixing strips (26) are distributed in a ring on the arc-shaped side of the arc-shaped elastic cover (23). The fixing strip (26) is aligned with the stabilizing strip (25).

6. The flat aviation cable prepared from modified polyimide according to claim 5, characterized in that: The flat inner channel (21) has an elliptical cross-section. The outer sheath (1) and the fixed end of the arc-shaped elastic cover (23) are connected by adhesive. The inner sheath (3) and the flat inner channel (21) are connected by adhesive.

7. A flat aviation cable made of modified polyimide according to claim 6, characterized in that: The outer sheath (1), inner sheath (3) and inner protective pipe (2) are all made of modified polyimide material.

Images