Moisture-proof vibration-damping airport cable with unshielded control lines

Abstract

The utility model discloses a moisture-proof vibration-damping airport cable with unshielded control lines, which comprises an inner-layer cable core body formed by twisting seven power cable cores together, a cross-linked fluororubber longitudinal hole insulator, a copper net braided armor layer and a PUR outer sheath are sequentially wrapped outside the inner-layer cable core body, six longitudinal holes are uniformly distributed in the circumferential direction of the cross-linked fluororubber longitudinal hole insulator, and the outer sheath is wrapped outside the copper net braided armor layer and the PUR outer sheath. Each longitudinal hole is internally provided with three or four control wire cores and filled with polypropylene moisture absorption core materials, each power wire core comprises an inner conductor, an alignment type wholly aromatic copolyamide stretched fiber woven separation net, a nylon resin moisture-proof dielectric layer and a thermoplastic polyester insulating layer, and the outer diameter of the PUR outer sheath is 44-48 mm. The airport cable is balanced and stable in cable core structure, high in mechanical strength, better in vibration reduction performance, excellent in moisture-proof and water-blocking characteristics, suitable for laying and installation in a complex underground environment, and better in durability and applicability.

Description

Technical Field

[0001] The present application belongs to the field of cable technology, and in particular relates to a moisture-proof and vibration-reducing airport cable with a non-shielded control line. Background Art

[0002] The 7-core airport cable with control line is suitable for 400Hz system, used for aircraft power supply, computer system and radar station, and suitable for laying on the ground, underwater, outdoors, indoors and in cable pipes. Its cabling method is concentric layer twisting of power core and star-twisted control core. The cable core structure has weak balance stability, low mechanical strength, poor vibration reduction performance during laying and installation, and the cable core structure is prone to deformation under vibration, resulting in core cross-linking and unstable electrical performance. In addition, the underground laying environment is relatively complex, and the cable's moisture-proof and waterproof performance is average, so the durability is poor, the maintenance and replacement cycle is short, and the maintenance cost is high. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide a moisture-proof and vibration-damping airport cable with a non-shielded control line. The cable core structure is balanced and stable, the mechanical strength is high, the vibration-damping performance is better, the moisture-proof and water-blocking properties are excellent, the cable is suitable for laying and installation in complex underground environments, and the durability is better.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The moisture-proof and vibration-damping airport cable with non-shielded control line includes seven power cores twisted together to form an inner core body. The outside of the inner core body is sequentially coated with a cross-linked fluororubber longitudinal hole insulator, a copper mesh braided armor layer and a PUR outer sheath. The cross-linked fluororubber longitudinal hole insulator is evenly distributed with six longitudinal holes in the circumference. Three or four control cores are arranged in each longitudinal hole and filled with polypropylene moisture-absorbing core material. The power core includes an inner conductor, a para-type fully aromatic copolyamide stretched fiber braided isolation net, a nylon resin moisture-proof dielectric layer and a thermoplastic polyester insulation layer. The outer diameter of the PUR outer sheath is 44mm to 48mm.

[0006] Preferably, the inner conductor is composed of a number of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm, which are coaxially twisted.

[0007] Preferably, the outer diameter of the power line core is 11 mm to 12 mm.

[0008] Preferably, the para-type wholly aromatic copolyamide stretched fiber woven isolation net is formed by a plurality of para-type wholly aromatic copolyamide stretched fiber strands being mutually spirally wound and woven in opposite directions.

[0009] Preferably, the weaving density of the para-type wholly aromatic copolyamide stretched fiber woven isolation mesh is not less than 95%.

[0010] Preferably, the thickness of the para-type wholly aromatic copolyamide stretched fiber woven isolation net does not exceed 0.05 mm.

[0011] Preferably, the control core comprises a control core conductor and an XLPE insulation layer.

[0012] Preferably, the control line core conductor is composed of a plurality of oxygen-free copper wires with a wire diameter of 0.01 mm to 0.08 mm twisted together.

[0013] Preferably, the thickness of the nylon resin moisture-proof medium layer does not exceed 0.1 mm.

[0014] Preferably, the copper mesh braided armor layer is formed by mutually counter-rotating spirally wound braided para-type wholly aromatic copolyamide stretched fiber strands and tinned copper wire mixed wires with a braiding density of not less than 85%.

[0015] Beneficial effects of this application:

[0016] 1. The cross-linked fluororubber longitudinal hole insulator is used to effectively separate and arrange seven insulating cores and six control cores in two layers to form a cable core structure, which can prevent core cross-linking. The cross-linked fluororubber longitudinal hole insulator helps to improve the flexibility and mechanical strength of the cable core. The cable core structure is balanced and stable. The cross-linked fluororubber longitudinal hole insulator has good physical and mechanical properties and high elasticity, which helps to improve the vibration reduction performance of the cable. When it is laid and installed underground, it is beneficial to reduce the oscillation load borne by each core. The cross-linked fluororubber longitudinal hole insulator can reduce the lateral pressure of the control core when it is bent, improve the bending resistance, inhibit the breakage of the wire and core, ensure stable electrical characteristics, and have better durability and applicability.

[0017] 2. By adding a nylon resin moisture-proof dielectric layer between the inner conductor of the power line core and the thermoplastic polyester insulation layer, it is beneficial to block the diffusion of water vapor into the insulation layer, and by filling the vertical hole with polypropylene moisture-absorbing core material, it helps to prevent water vapor from penetrating into the control line core insulation layer, delaying the water tree aging phenomenon of the insulation layer. It has excellent moisture-proof and water-blocking properties, while taking into account the improvement of flexibility and vibration reduction performance. It is suitable for laying and installation in complex underground environments and has better durability.

[0018] 3. By adding a para-type wholly aromatic copolyamide stretched fiber woven isolation net between the inner conductor of the power line core and the nylon resin moisture-proof dielectric layer, the para-type wholly aromatic copolyamide stretched fiber has a large tensile modulus, which helps to improve the tensile strength, prevent the nylon resin from adhering to the copper wire, enhance the flexibility and tensile strength of the inner conductor, and increase the axial extension margin of the inner conductor. In addition, the copper mesh woven armor layer provides additional mechanical protection and has a certain resistance to slight impact. It is formed by braiding a para-type wholly aromatic copolyamide stretched fiber strand and a tinned copper wire mixed wire. The para-type wholly aromatic copolyamide stretched fiber strand helps to improve the flexibility and tensile resistance of the armor layer, reduce the local stress concentration of the armor layer, reduce the torque during bending, protect the sheath layer, increase safety and reliability, and have stronger adaptability to underground space laying and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1-power line core, 2-cross-linked fluororubber longitudinal hole insulator, 3-copper mesh braided armor layer, 4-PUR outer sheath, 5-longitudinal hole, 6-control line core, 7-polypropylene moisture-absorbing core material, 8-inner conductor, 9-para-type fully aromatic copolyamide stretched fiber braided isolation net, 10-nylon resin moisture-proof dielectric layer, 11-thermoplastic polyester insulation layer, 12-control line core conductor, 13-XLPE insulation layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0023] See also Figure 1The moisture-proof and vibration-damping airport cable with non-shielded control line of the embodiment of the present application includes seven power cores 1 twisted together to form an inner core body, and the power core 1 includes an inner conductor 8, a para-type fully aromatic copolyamide stretched fiber braided isolation net 9, a nylon resin moisture-proof dielectric layer 10 and a thermoplastic polyester insulation layer 11. Specifically, the inner conductor 8 is composed of a number of tinned copper monofilaments with a wire diameter of 0.05mm to 0.08mm concentrically twisted. In one embodiment, the para-type fully aromatic copolyamide stretched fiber braided isolation net 9 is composed of a number of para-type fully aromatic copolyamide stretched fiber strands that are mutually reversely spirally wound and braided. Furthermore, the braiding density is not less than 95%, and the thickness of the para-type fully aromatic copolyamide stretched fiber braided isolation net 9 does not exceed 0.05mm. The thickness of the nylon resin moisture-proof dielectric layer 10 does not exceed 0.1mm. The outer diameter of the power core 1 is 11mm to 12mm.

[0024] The outside of the inner core body is sequentially coated with a cross-linked fluororubber longitudinal hole insulator 2, a copper mesh braided armor layer 3 and a PUR outer sheath 4. In one embodiment, the copper mesh braided armor layer 3 is composed of a para-type fully aromatic copolyamide stretched fiber strand and a tinned copper wire mixed wire, which are mutually reversely spirally wound and woven with a braiding density of not less than 85%. The outer diameter of the PUR outer sheath 4 is 44mm to 48mm. The cross-linked fluororubber longitudinal hole insulator 2 is uniformly provided with six longitudinal holes 5 in the circumference, and three or four control cores 6 are arranged in each longitudinal hole 5 and filled with a polypropylene moisture-absorbing core material 7. In one embodiment, the control core 6 includes a control core conductor 12 and an XLPE insulation layer 13. Specifically, the control core conductor 12 is composed of a plurality of oxygen-free copper wires with a wire diameter of 0.01mm to 0.08mm twisted together.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. Moisture-proof and vibration-reducing airport cable with unshielded control line, its characteristics are: The invention comprises seven power line cores (1) twisted together to form an inner line core body, wherein the outer portion of the inner line core body is covered with a cross-linked fluororubber longitudinal hole insulator (2), a copper mesh braided armor layer (3) and a PUR outer sheath (4) in sequence, wherein the cross-linked fluororubber longitudinal hole insulator (2) is provided with six longitudinal holes (5) evenly distributed in the circumferential direction, wherein three or four control line cores (6) are arranged in each longitudinal hole (5) and filled with a polypropylene moisture-absorbing core material (7), wherein the power line core (1) comprises an inner conductor (8), a para-type fully aromatic copolyamide stretched fiber braided isolation net (9), a nylon resin moisture-proof dielectric layer (10) and a thermoplastic polyester insulation layer (11), and wherein the outer diameter of the PUR outer sheath (4) is 44 mm to 48 mm.

2. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The inner conductor (8) is composed of a plurality of tinned copper monofilaments having a wire diameter of 0.05 mm to 0.08 mm, which are coaxially twisted.

3. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The outer diameter of the power line core (1) is 11 mm to 12 mm.

4. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The para-type wholly aromatic copolyamide stretched fiber woven isolation net (9) is formed by a plurality of para-type wholly aromatic copolyamide stretched fiber strands being mutually spirally wound and woven.

5. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 4 is characterized by: The para-type fully aromatic copolyamide stretched fiber woven isolation net (9) has a weaving density of not less than 95%.

6. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 4 is characterized by: The thickness of the para-type wholly aromatic copolyamide stretched fiber woven isolation net (9) does not exceed 0.05 mm.

7. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The control core (6) comprises a control core conductor (12) and an XLPE insulation layer (13).

8. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 7 is characterized by: The control line core conductor (12) is formed by twisting a plurality of oxygen-free copper wires with a wire diameter of 0.01 mm to 0.08 mm.

9. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The thickness of the nylon resin moisture-proof medium layer (10) does not exceed 0.1 mm.

10. The moisture-proof and vibration-damping airport cable with unshielded control line according to claim 1 is characterized by: The copper mesh braided armor layer (3) is formed by mutually counter-rotating spirally wound braided para-type fully aromatic copolyamide stretched fiber strands and tinned copper wire mixed wires, and the braiding density is not less than 85%.

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