Aviation shielding cable

Abstract

The utility model relates to an aviation shielding cable, which belongs to the technical field of power cables and comprises a cable body, the cable body comprises a conductor layer, an inner protective layer, a shielding layer and an outer protective layer which are coaxially arranged from inside to outside, the outer wall of the conductor layer is attached to the inner wall of the inner protective layer, and the outer wall of the inner protective layer is attached to the inner wall of the shielding layer. The outer wall of the shielding layer is attached to the inner wall of the outer protection layer. According to the invention, the connection part of the wiring terminal of the aviation shielding cable and the aviation equipment is not easy to loosen.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an aviation shielded cable. Background Art

[0002] Aviation cables are important transmission cables used to transmit data, commands and other signals in the field of aviation flight. They are often used to transmit external information obtained by aircraft and transmit commands issued by the control center. In order to facilitate the maintenance of aircraft and reduce the potential safety hazards of aircraft lines, the pipelines in the aircraft (including aviation shielded cables) often need to be reasonably designed and fixed to avoid entanglement between the pipelines, which is also convenient for later inspection and maintenance.

[0003] The outside of aviation cables is usually covered with a wave-proof sleeve to shield and wave-proof the cables and wires to reduce the impact of electromagnetic waves generated by aviation cables on avionics equipment and the interference of electromagnetic waves on electronic components.

[0004] The wave-proof sleeve in the prior art usually adopts metal materials, such as aluminum, copper or nickel, to provide electromagnetic shielding performance. However, the existing wave-proof sleeve usually needs to be fixed with a cable tie. The wave-proof sleeve is not tightly bonded to the surface of the aviation cable, which not only increases the space occupied by the aviation cable, but also when in use, the wave-proof sleeve vibrates with the operation of the spacecraft, causing the aviation cable to shake, resulting in loosening of the connection between the power terminal of the aviation cable and the aviation equipment, causing mechanical failure. In addition, the existing wave-proof sleeve made of polyolefin is easily damaged in a high temperature environment, and the high temperature resistance performance needs to be further improved. Utility Model Content

[0005] In order to prevent the connection between the wiring terminal of the aviation cable and the aviation equipment from loosening, the present application provides an aviation shielded cable.

[0006] The present application provides an aviation shielded cable, which adopts the following technical solution:

[0007] An aviation shielded cable is used in aviation equipment, comprising a cable body. Both ends of the cable body are provided with wiring terminals. The cable body comprises a conductor layer, an inner protective layer, a shielding layer and an outer protective layer coaxially arranged from the inside to the outside. The outer wall of the conductor layer is in contact with the inner wall of the inner protective layer, the outer wall of the inner protective layer is in contact with the inner wall of the shielding layer, and the outer wall of the shielding layer is in contact with the inner wall of the outer protective layer.

[0008] By adopting the above technical solution, the shielding layer is arranged between the inner protective layer and the outer protective layer, which can improve the tightness of the connection between the shielding layer and the cable body without affecting the shielding effect of the shielding layer, and reduce the shaking of the cable body during the operation of the aviation equipment, so that the connection terminal of the aviation shielded cable and the connection with the aviation equipment is not easy to loosen.

[0009] Preferably, a wave-breaking layer is further provided outside the cable body, and the wave-breaking layer is adhered to the outer wall of the cable body by spiral winding, and the wave-breaking layer and the cable body are fixed by gluing.

[0010] By adopting the above technical scheme and setting up a wave-breaking layer, the interference of external signals on the transmission of the aviation shielded cable is further limited, thereby protecting the transmission quality of the internal signals of the aviation shielded cable. In addition, the connection between the wave-breaking layer and the cable body is tight, which is not easy to affect the connection between the wiring terminals of the aviation shielded cable and the aviation equipment.

[0011] Preferably, both ends of the cable body are provided with pressing blocks, and the pressing blocks are in contact with the outer wall of the wave-breaking layer.

[0012] By adopting the above technical solution, the reliability of the connection between the wave-breaking layer and the cable body is improved through the joint of the compression block covering the wave-breaking layer.

[0013] Preferably, the conductor layer is made of tin-plated copper, the inner protective layer and the outer protective layer are both made of fluoroplastics, and the shielding layer and the wave-breaking layer are both woven metal wire meshes.

[0014] By adopting the above technical scheme, the conductor layer made of tinned copper is relatively soft and has good electrical conductivity. Compared with bare copper wire, it also has better corrosion resistance and oxidation resistance, and makes the conductor layer not easy to turn black and brittle, effectively extending the service life of the aviation shielded cable; fluoroplastics themselves are inert and not easy to react chemically with other substances, so they have excellent corrosion resistance and can provide good protection for the conductor layer and the shielding layer; fluoroplastics also have excellent insulation properties and can be used in special environments such as high voltage and high frequency without causing current leakage or dielectric breakdown, further extending the service life of the aviation shielded cable. In addition, fluoroplastics also have certain anti-interference properties, which can ensure the normal use of the aviation shielded cable; the metal wire mesh has good shielding and anti-interference properties, which can ensure the transmission rate of the aviation shielded cable.

[0015] Preferably, both ends of the cable body are further provided with a limit cover shell, the limit cover shell is provided with a through hole for the cable body to pass through, the limit cover shell includes a accommodating cavity for accommodating the pressing block, the accommodating cavity is connected with the through hole, the limit cover shell is provided with a closing piece for closing the through hole, the limit cover shell is equipped with a fixing piece, and the limit cover shell is fixed to the aviation equipment through the fixing piece.

[0016] By adopting the above technical solution, after the limit cover is fixed to the aviation equipment through the fixing parts, the pressing block is located between the limit cover and the aviation equipment, and the limit cover can cooperate with the closing part and the pressing block to limit the movement of the aviation shielded cable to be separated from the limit cover, thereby making it difficult for the wiring terminals of the aviation shielded cable to be separated from the aviation equipment.

[0017] Preferably, the closing member includes a closing plate slidably connected to the limiting cover shell, the limiting cover shell is provided with a closing groove for the closing plate to slide, the closing groove is connected to the through hole, the closing plate is provided with an engaging groove for the cable body to engage, and the limiting cover shell is provided with a limiting elastic member for pushing the closing plate to slide to close the through hole.

[0018] By adopting the above technical solution, with the cooperation of the limiting elastic member and the closing plate, the aviation shielded cable is limited from moving to be separated from the limiting cover, thereby improving the reliability of fixing the aviation shielded cable by the limiting cover.

[0019] Preferably, a control block is provided on the closing plate, and one end of the control block away from the closing plate passes through a limiting cover shell. A control groove for sliding movement of the control block is provided on the limiting cover shell, and the control groove is connected to the closing groove.

[0020] By adopting the above technical solution, with the cooperation of the control block and the control groove, it is easy to control the closing plate to slide to release the closing of the through hole.

[0021] Preferably, the fixing member comprises a fixing bolt, and the fixing bolt is threadably matched with the aviation equipment, and the limiting cover is provided with a fixing through hole for the fixing bolt to pass through.

[0022] By adopting the above technical solution, the limiting cover is fixed to the aviation equipment by fixing bolts, so that the limiting cover and the aviation equipment are detachably connected, which facilitates the disassembly and assembly of the limiting cover.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The shielding layer is arranged between the inner protective layer and the outer protective layer, which can improve the tightness of the shielding layer and the cable body without affecting the shielding effect of the shielding layer, reduce the shaking of the cable body during the operation of the aviation equipment, and make the connection between the terminal of the aviation shielded cable and the aviation equipment less likely to loosen;

[0025] 2. The setting of the wave-proof layer further limits the interference of external signals on the transmission of aviation shielded cables, protects the transmission quality of internal signals of aviation shielded cables, and the connection between the wave-proof layer and the cable body is tight, which is not easy to affect the connection between the wiring terminals of the aviation shielded cable and aviation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the aviation shielded cable according to an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the closed plate structure in the embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Cable body; 11. Conductor layer; 12. Inner protective layer; 13. Shielding layer; 14. Outer protective layer; 15. Wave-proof layer; 16. Pressing block; 17. Terminal block; 2. Limiting cover; 21. Through hole; 22. Accommodating cavity; 23. Fixed through hole; 24. Closing plate; 241. Fitting groove; 25. Control block; 251. Control groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The following is combined with Figure 1-3 The utility model is described in further detail.

[0032] The present application embodiment discloses an aviation shielded cable, referring to Figure 1 , including a cable body 1, the cable body 1 includes a conductor layer 11, an inner protective layer 12, a shielding layer 13 and an outer protective layer 14 coaxially arranged from the inside to the outside, the outer wall of the conductor layer 11 is in contact with the inner wall of the inner protective layer 12, the outer wall of the inner protective layer 12 is in contact with the inner wall of the shielding layer 13, the outer wall of the shielding layer 13 is in contact with the inner wall of the outer protective layer 14, the conductor layer 11 is the conductive part of the aviation shielded cable, the inner protective layer 12 is used to prevent current leakage, the shielding layer 13 is used to protect the transmission quality of the internal signal of the aviation shielded cable, and the outer protective layer 14 is used to ensure the strength of the cable body 1.

[0033] The shielding layer 13 is arranged between the inner protective layer 12 and the outer protective layer 14. This can improve the tightness of the combination of the shielding layer 13 and the cable body 1 without affecting the shielding effect of the shielding layer 13, reduce the shaking of the cable body 1 during the operation of the aviation equipment, and thus make it difficult for the connection terminal 17 of the aviation shielded cable and the aviation equipment to loosen.

[0034] Reference Figure 1 The conductor layer 11 is made of tinned copper. The conductor layer 11 made of tinned copper is relatively soft and has good conductivity. Compared with bare copper wire, it also has better corrosion resistance and oxidation resistance. It also makes the conductor layer 11 not easy to turn black and brittle, effectively extending the service life of the aviation shielded cable.

[0035] Reference Figure 1 The inner protective layer 12 and the outer protective layer 14 are both made of fluoroplastics. Fluoroplastics themselves are inert and not easy to react chemically with other substances, so they have excellent corrosion resistance and can provide good protection for the conductor layer 11 and the shielding layer 13. Fluoroplastics also have excellent insulation properties and can be used in special environments such as high voltage and high frequency without causing current leakage or dielectric breakdown, further extending the service life of the aviation shielded cable. In addition, fluoroplastics also have certain anti-interference properties, which can ensure the normal use of the aviation shielded cable.

[0036] Reference Figure 1 and Figure 2 A wave-breaking layer 15 is also provided outside the cable body 1. The shielding layer 13 and the wave-breaking layer 15 are both woven metal wire meshes. The shielding layer 13 is tubular, and the wave-breaking layer 15 is strip-shaped. The wave-breaking layer 15 is adhered to the outer wall of the cable body 1 in a spiral winding manner. The wave-breaking layer 15 and the cable body 1 are fixed by gluing. The wave-breaking layer 15 further limits the interference of external signals on the transmission of the aviation shielded cable, protects the transmission quality of the internal signals of the aviation shielded cable, and the wave-breaking layer 15 is tightly connected to the cable body 1, which is not easy to affect the connection between the wiring terminal 17 of the aviation shielded cable and the aviation equipment.

[0037] Reference Figure 2 and Figure 3 Both ends of the cable body 1 are provided with pressing blocks 16, which are fitted with the outer wall of the wave-breaking layer 15. The pressing blocks 16 are fixed to the cable body 1 by injection molding. The reliability of the connection between the wave-breaking layer 15 and the cable body 1 is improved by the joint of the pressing block 16 covering the wave-breaking layer 15.

[0038] Reference Figure 2 and Figure 3, both ends of the cable body 1 are provided with connection terminals 17, and both ends of the cable body 1 are also provided with a limit cover 2, a through hole 21 for the cable body 1 to pass through is provided on the limit cover 2, the limit cover 2 includes a receiving cavity 22 for receiving the pressing block 16, the receiving cavity 22 is connected with the through hole 21, there are one or more through holes 21 on the limit cover 2, depending on the specific situation, in the embodiment of the present application, there are two through holes 21. The limit cover 2 is equipped with a fixing part, the limit cover 2 is fixed to the aviation equipment by the fixing part, the fixing part includes a fixing bolt, the fixing bolt is threadedly fixed to the aviation equipment, and a fixing through hole 23 for the fixing bolt to pass through is provided on the limit cover 2, so that the limit cover 2 and the aviation equipment are detachably connected, which is convenient for the disassembly and assembly of the limit cover 2.

[0039] Reference Figure 2 and Figure 3 The limiting cover shell 2 is provided with a closing piece for closing the through hole 21, and the closing piece includes a closing plate 24 slidably connected to the limiting cover shell 2. The limiting cover shell 2 is provided with a closing groove for the closing plate 24 to slide, and the closing groove is communicated with the through hole 21. The closing plate 24 is provided with an engaging groove 241 for the cable body 1 to engage with. The limiting cover shell 2 is provided with a limiting elastic piece for pushing the closing plate 24 to slide to close the through hole 21. In the embodiment of the present application, the limiting cover shell 2 uses a limiting spring, and the limiting spring is located in the closing groove. One end of the limiting spring is fixed to the closing plate 24, and the other end of the limiting spring is fixed to the inner wall of the closing groove. The limiting spring and the closing plate 24 cooperate to limit the movement of the aviation shielded cable to detach from the limiting cover shell 2.

[0040] When the limiting cover 2 is fixed to the aviation equipment, the limiting cover 2 can cooperate with the closing plate 24 and the pressing block 16 to limit the movement of the aviation shielded cable, further making it difficult for the connecting terminal 17 of the aviation shielded cable to be separated from the aviation equipment.

[0041] Reference Figure 2 and Figure 3 A control block 25 is provided on the closing plate 24. One end of the control block 25 away from the closing plate 24 passes through the limiting cover 2. A control groove 251 for the control block 25 to slide is provided on the limiting cover 2. The control groove 251 is connected to the closing groove. With the cooperation of the control block 25 and the control groove 251, the sliding of the closing plate 24 is easily controlled.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An aviation shielded cable, used in aviation equipment, characterized in that: The invention comprises a cable body (1), both ends of which are provided with connection terminals (17), the cable body (1) comprising a conductor layer (11), an inner protective layer (12), a shielding layer (13) and an outer protective layer (14) which are coaxially arranged from the inside to the outside, the outer wall of the conductor layer (11) is in contact with the inner wall of the inner protective layer (12), the outer wall of the inner protective layer (12) is in contact with the inner wall of the shielding layer (13), and the outer wall of the shielding layer (13) is in contact with the inner wall of the outer protective layer (14).

2. The aviation shielded cable according to claim 1, characterized in that: The cable body (1) is also provided with a wave-breaking layer (15) outside, and the wave-breaking layer (15) is adhered to the outer wall of the cable body (1) by means of spiral winding, and the wave-breaking layer (15) and the cable body (1) are fixed by gluing.

3. The aviation shielded cable according to claim 2, characterized in that: Both ends of the cable body (1) are provided with pressing blocks (16), and the pressing blocks (16) are in contact with the outer wall of the wave-breaking layer (15).

4. The aviation shielded cable according to claim 2, characterized in that: The conductor layer (11) is made of tin-plated copper, the inner protective layer (12) and the outer protective layer (14) are both made of fluoroplastics, and the shielding layer (13) and the wave-proof layer (15) are both woven metal wire meshes.

5. The aviation shielded cable according to claim 3, characterized in that: Both ends of the cable body (1) are also provided with a limiting cover (2), the limiting cover (2) is provided with a through hole (21) for the cable body (1) to pass through, the limiting cover (2) includes a receiving cavity (22) for receiving a pressing block (16), the receiving cavity (22) is communicated with the through hole (21), the limiting cover (2) is provided with a closing piece for closing the through hole (21), the limiting cover (2) is provided with a fixing piece, and the limiting cover (2) is fixed to the aviation equipment via the fixing piece.

6. The aviation shielded cable according to claim 5, characterized in that: The closing member comprises a closing plate (24) slidably connected to the limiting cover (2); the limiting cover (2) is provided with a closing groove for the closing plate (24) to slide, the closing groove is communicated with the through hole (21); the closing plate (24) is provided with an engaging groove (241) for the cable body (1) to engage; the limiting cover (2) is provided with a limiting elastic member for pushing the closing plate (24) to slide to close the through hole (21).

7. The aviation shielded cable according to claim 6, characterized in that: The closing plate (24) is provided with a control block (25), one end of the control block (25) away from the closing plate (24) passes through the limiting cover (2), the limiting cover (2) is provided with a control groove (251) for the control block (25) to slide, and the control groove (251) is communicated with the closing groove.

8. The aviation shielded cable according to claim 5, characterized in that: The fixing member comprises a fixing bolt, the fixing bolt is threadably matched with the aviation equipment, and the limiting cover (2) is provided with a fixing through hole (23) for the fixing bolt to pass through.

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