Polyimide cable for aerospace

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a polyimide cable for aerospace, which comprises a cable core, an inner coating layer is arranged on the outer side of the cable core, an outer coating layer is arranged on the outer side of the inner coating layer, an inner protective pad for isolating external negative effects is laid on the outer side of the cable core, and an outer protective pad is laid on the outer side of the cable core. The cable core comprises an inner wrapping layer and an outer wrapping layer, an inner protection pad is laid on the outer side of the inner wrapping layer, the inner protection pad is located on the outer side of the inner wrapping layer, an isolation pad used for enhancing the external force resistance performance is laid on the outer side of the inner protection pad, an outer protection pad is laid on the outer side of the isolation pad, the outer protection pad is located on the inner side of the outer wrapping layer, and connecting frame plates used for clamping and fixing the adjacent outer protection pad are further arranged on the two sides of the cable core. The cable provided by the utility model can adapt to various complex laying environments and can adapt to the extrusion of external force and the negative effects of high temperature and the like, the interior of the cable still keeps stable use performance when the exterior of the cable is damaged, the service life of the cable is prolonged, subsequent treatment and use such as maintenance and replacement are facilitated, and the practicability of the cable is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, in particular to a polyimide cable for aerospace. Background Art

[0002] Aerospace polyimide cable is a high-performance cable widely used in the aerospace field. Polyimide (PI) is a high-performance polymer material, which is favored for its excellent high temperature resistance, electromagnetic interference resistance, corrosion resistance and other characteristics. It usually has the characteristics of high and low temperature resistance, aging resistance, flame retardancy, low attenuation, stable signal transmission, etc. In addition, they also have the characteristics of radiation resistance, low thermal vacuum outgassing, small outer diameter, light weight, bending resistance, salt spray resistance, moisture resistance, mildew resistance and other environmental application characteristics. These characteristics enable polyimide cables to maintain excellent electrical and mechanical properties in harsh aerospace environments, ensuring stable and reliable signal transmission;

[0003] Due to the particularity of the aircraft working environment, such as high temperature, high humidity, strong electromagnetic interference and other factors, the cable may age faster, thus affecting its performance and life. In addition, the space inside the aircraft is limited, and some cables may be bent or squeezed, which will also accelerate the loss and aging of cable materials, and even cause the cable to be squeezed and deformed, damaging the internal structure, affecting the normal performance of the cable;

[0004] In order to solve the above problems, the present application proposes a polyimide cable for aerospace use. Utility Model Content

[0005] The utility model aims to provide a polyimide cable for aerospace use, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a polyimide cable for aerospace, comprising a cable core, an inner coating layer is arranged on the outer side of the cable core, an outer coating layer is arranged on the outer side of the inner coating layer, an inner protective pad for isolating negative external influences is laid on the outer side of the cable core, the inner protective pad is located on the outer side of the inner coating layer, an isolation pad for enhancing external force resistance performance is laid on the outer side of the inner protective pad, an outer protective pad is laid on the outer side of the isolation pad, the outer protective pad is located on the inner side of the outer coating layer, connecting plates for clamping and fixing adjacent outer protective pads are also arranged on both sides of the cable core, and an elastic air bag for buffering external forces is arranged on the outer side of the isolation pad.

[0008] Furthermore, a positioning hole for connecting the inner covering layer and the outer covering layer is opened inside the connecting plate, and the interior of the positioning hole is filled with connecting ribs for connecting the inner covering layer and the outer covering layer respectively.

[0009] Furthermore, a plugging plate is provided on the inner side of the connecting plate, and the plugging plate is used to fill the gaps between adjacent inner protective pads, adjacent isolation pads and adjacent outer protective pads, and the positioning hole runs through the plugging plate.

[0010] Furthermore, side grooves for installing connecting plates are provided on the outer side of the end of the outer protective pad and the inner side of the outer covering layer.

[0011] Furthermore, an arc-shaped groove for docking with the elastic airbag is provided on the outer side of the inner protection pad and the inner side of the outer protection pad.

[0012] Furthermore, the inner protective pads and the outer protective pads are laid symmetrically on the outer side of the cable core, and clamping grooves for installing plug plates are formed between adjacent inner protective pads, adjacent isolation pads and adjacent outer protective pads.

[0013] Furthermore, the elastic airbags are arranged at equal intervals on the outer side of the isolation pad, and bending gaps are formed between adjacent elastic airbags to adapt to bending and laying operations.

[0014] The utility model has the following beneficial effects:

[0015] The utility model utilizes elastic airbags to buffer external forces, which can greatly reduce the impact of extrusion deformation, and then isolates external high temperature and cracking through the inner and outer protective pads to prevent direct transmission to the inside to affect the normal use of the cable. Compared with the existing polyimide cable, it can easily adapt to smaller installation spaces and external force extrusion, and can also avoid the impact on the normal use of the cable when it is deformed and damaged, thereby improving the practical performance of the cable and reducing its failure rate.

[0016] The utility model lays the inner protective pad, the isolation pad and the outer protective pad on the outside of the cable core, inserts the plug plate between the adjacent outer protective pads to form a limit, and then performs an extrusion package operation simultaneously with the cable core to form a fusion, so that the inner protective pad, the isolation pad and the outer protective pad are combined into an integrated structure. After this arrangement, the cable can maintain a normal transmission structure while optimizing the external structure to make it adapt to a variety of laying environments, adapt to different work requirements and improve its practicality.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cable cross-section structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the cable of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the cable assembly part of the utility model;

[0023] Figure 5 It is a partial enlarged structural schematic diagram of part A of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] In the figure: 1. cable core; 2. inner coating layer; 3. outer coating layer; 4. inner protective pad; 5. isolation pad; 6. outer protective pad; 7. connecting plate; 8. elastic airbag; 9. positioning hole; 10. plug plate; 11. connecting rib; 12. side groove; 13. arc groove; 14. clamping groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] See also Figure 1-5As shown, the utility model is a polyimide cable for aerospace, comprising a cable core 1, an inner coating layer 2 is arranged on the outer side of the cable core 1, an outer coating layer 3 is arranged on the outer side of the inner coating layer 2, an inner protective pad 4 for isolating external negative influences is laid on the outer side of the cable core 1, the inner protective pad 4 is located on the outer side of the inner coating layer 2, an isolation pad 5 for enhancing external force resistance is laid on the outer side of the inner protective pad 4, an outer protective pad 6 is laid on the outer side of the isolation pad 5, and the outer protective pad 6 is located on the inner side of the outer coating layer 3, connecting plates 7 for clamping and fixing adjacent outer protective pads 6 are also arranged on both sides of the cable core 1, and an elastic air bag 8 for buffering external forces is arranged on the outer side of the isolation pad 5. In this embodiment, the outer protective pad 6 is used to isolate the rupture of the outer coating layer 3 and external high temperature, so that when the outer coating layer 3 is damaged, the internal performance can still be stable, so as to avoid affecting the normal use of the cable and facilitate subsequent maintenance and other processing and use.

[0029] Among them, a positioning hole 9 for connecting the inner covering layer 2 with the outer covering layer 3 is opened inside the connecting plate 7, and the interior of the positioning hole 9 is filled with connecting ribs 11 respectively connecting the inner covering layer 2 and the outer covering layer 3. In this embodiment, a layered covering structure of the inner covering layer 2 and the outer covering layer 3 is formed through the positioning hole 9 during the extrusion operation.

[0030] Among them, a plug plate 10 is provided on the inner side of the connecting plate 7, and the plug plate 10 is used to fill the gaps between adjacent inner protective pads 4, adjacent isolation pads 5 and adjacent outer protective pads 6. The positioning hole 9 runs through the plug plate 10. In this embodiment, the connecting plate 7 is also used to fill the gaps to form a seal, so that the adjacent isolation pads 5 are in a detachable state, and they can be repaired and replaced by removing the external mechanism.

[0031] The outer side of the end of the outer protective pad 6 and the inner side of the outer covering layer 3 are both provided with side grooves 12 for installing the connecting plate 7 .

[0032] The outer side of the inner protection pad 4 and the inner side of the outer protection pad 6 are both provided with arc grooves 13 for docking with the elastic airbag 8. In this embodiment, the arc grooves 13 are used to prevent the elastic airbag 8 from being squeezed and dislocated.

[0033] The inner protective pads 4 and the outer protective pads 6 are laid symmetrically on the outer side of the cable core 1 , and clamping grooves 14 for installing the plug plates 10 are formed between adjacent inner protective pads 4 , adjacent isolation pads 5 and adjacent outer protective pads 6 .

[0034] Among them, the elastic airbags 8 are arranged at equal intervals on the outside of the isolation pad 5, and bending gaps are formed between adjacent elastic airbags 8 to adapt to bending and laying operations. The bending space provided in this embodiment can make the cable adapt to various complex laying environments.

[0035] It can be understood that the utility model can adapt to a variety of complex laying environments, and adapt to negative influences such as external force extrusion and high temperature. When the outside of the cable is damaged, the inside still maintains stable performance, which increases its service life and facilitates subsequent maintenance and replacement, effectively improving the practicality of the cable.

[0036] A specific application of this embodiment is: first, after the inner protective pad 4 is laid on the outside of the transmission path of the cable core 1 through external equipment, the isolation pad 5 is placed outside to be laid on the outside of the inner protective pad 4, and the elastic air bag 8 is made to correspond to the arc groove 13, and then the outer protective pad 6 is laid in the same way, and the plug plate 10 is further inserted into the inner gap of the clamping groove 14 to fill the gap to form a seal, and the adjacent outer protective pad 6 is clamped and fixed by the connecting plate 7, and finally a fusion is formed by the same extrusion operation. After this arrangement, the structure of the outside of the cable can be optimized. At this time, the elastic air bag 8 can be used to buffer the external force instead of isolating the external negative influence through the inner protective pad 4 and the outer protective pad 6, so that the cable can show more superior performance, adapt to a variety of laying environments, and improve its practicality.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A polyimide cable for aerospace use, comprising a cable core (1), characterized in that: An inner coating layer (2) is arranged on the outer side of the cable core (1), an outer coating layer (3) is arranged on the outer side of the inner coating layer (2), an inner protective pad (4) for isolating negative external influences is laid on the outer side of the cable core (1), the inner protective pad (4) is located on the outer side of the inner coating layer (2), an isolation pad (5) for enhancing the external force resistance performance is laid on the outer side of the inner protective pad (4), an outer protective pad (6) is laid on the outer side of the isolation pad (5), the outer protective pad (6) is located on the inner side of the outer coating layer (3), connecting plates (7) for clamping and fixing adjacent outer protective pads (6) are also arranged on both sides of the cable core (1), and an elastic air bag (8) for buffering external forces is arranged on the outer side of the isolation pad (5).

2. The polyimide cable for aerospace use according to claim 1, characterized in that: A positioning hole (9) for connecting the inner covering layer (2) and the outer covering layer (3) is provided inside the connecting plate (7), and the interior of the positioning hole (9) is filled with connecting ribs (11) for respectively connecting the inner covering layer (2) and the outer covering layer (3).

3. The polyimide cable for aerospace use according to claim 2, characterized in that: A plug plate (10) is provided on the inner side of the connecting plate (7), and the plug plate (10) is used to fill the gaps between adjacent inner protective pads (4), adjacent isolation pads (5) and adjacent outer protective pads (6), and the positioning hole (9) passes through the plug plate (10).

4. The polyimide cable for aerospace use according to claim 1, characterized in that: Side grooves (12) for mounting the connecting plate (7) are provided on the outer side of the end of the outer protective pad (6) and the inner side of the outer covering layer (3).

5. The polyimide cable for aerospace use according to claim 1, characterized in that: The outer side of the inner protective pad (4) and the inner side of the outer protective pad (6) are both provided with arc-shaped grooves (13) for docking with the elastic airbag (8).

6. The polyimide cable for aerospace use according to claim 1, characterized in that: The inner protective pads (4) and the outer protective pads (6) are laid out on the outer side of the cable core (1) in an up-and-down symmetrical manner, and clamping grooves (14) for installing plug plates (10) are formed between adjacent inner protective pads (4), adjacent isolation pads (5), and adjacent outer protective pads (6).

7. The polyimide cable for aerospace use according to claim 1, characterized in that: The elastic airbags (8) are arranged at equal intervals on the outside of the isolation pad (5), and bending gaps are formed between adjacent elastic airbags (8) to adapt to bending and laying operations.

Images