Extrusion-resistant elastic recovery type airport cable

Abstract

The utility model discloses an extrusion-resistant elastic recovery type airport cable which comprises an inner conductor, a cross-linked fluororubber longitudinal hole insulator, an alignment type wholly aromatic copolyamide stretched fiber plain woven net and a polyurethane outer sheath are sequentially coated outside the inner conductor, six longitudinal holes are uniformly distributed in the circumferential direction of the cross-linked fluororubber longitudinal hole insulator, and the cross-linked fluororubber longitudinal hole insulator is provided with a cross-linked fluororubber longitudinal hole insulator and an alignment type wholly aromatic copolyamide stretched fiber plain woven net. The neutral conductor and the control wire core are separately arranged in different longitudinal holes; and the control wire core comprises a control wire core conductor and an XLPE insulating layer. The cable core is balanced and stable in structure, high in mechanical strength, better in extrusion resistance and high in elastic recovery capability, is beneficial to inhibiting wire and core breakage, ensures the stability of electrical characteristics, and is durable in use.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an extrusion-resistant elastic recovery type airport cable. Background Art

[0002] Halogen-free 400Hz split-core concentric airport cables are suitable for 400Hz systems, aircraft power supplies, computer systems and radar stations, and are suitable for laying on the ground, underwater, outdoors, indoors and in cable tubes. The cable is made of a neutral conductor and a control line separated by a prosthesis and twisted in spiral concentric layers. However, the cable core structure has average balance stability, weak mechanical strength, poor bending and extrusion resistance, and is difficult to restore to its original state by its own elasticity after being bent and extruded. The cable core structure is deformed due to bending and extrusion, and it is very easy to break the wire and core, resulting in unstable electrical performance and affecting normal operation. Utility Model Content

[0003] The utility model aims to solve the technical problem of providing an extrusion-resistant elastic recovery type airport cable in view of the deficiencies in the prior art. The cable core structure is balanced and stable, the mechanical strength is high, the extrusion resistance is better, and the elastic recovery ability is high, which is conducive to suppressing the occurrence of wire and core breakage, ensuring the stability of electrical characteristics, and durable use.

[0004] The utility model solves the above technical problems through the following technical solutions.

[0005] The extrusion-resistant elastic recovery airport cable comprises an inner conductor, the outer portion of which is sequentially coated with a cross-linked fluororubber longitudinal hole insulator, a para-type wholly aromatic copolyamide stretched fiber plain weave and a polyurethane outer sheath, the cross-linked fluororubber longitudinal hole insulator is provided with six longitudinal holes evenly distributed in the circumference, the neutral conductor and the control core are separately arranged in different longitudinal holes, and the control core comprises a control core conductor and an XLPE insulation layer.

[0006] Preferably, the inner conductor is composed of a number of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.3 mm, which are coaxially twisted.

[0007] Preferably, the neutral conductor is a tinned copper monofilament conductor.

[0008] 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.

[0009] Preferably, the para-type wholly aromatic copolyamide stretched fiber plain woven web is a double-layer inner and outer para-type wholly aromatic copolyamide stretched fiber strand plain woven web structure.

[0010] Preferably, the inner layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a plain woven mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a plain woven mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

[0011] Preferably, the weaving density of the para-type wholly aromatic copolyamide stretched fiber plain weave mesh is not less than 90%.

[0012] Preferably, the number of control wire cores is eight and they are separately disposed in the two longitudinal holes.

[0013] Preferably, the vertical holes are filled with para-type wholly aromatic copolyamide stretched fiber core material.

[0014] Preferably, the outer diameter of the polyurethane outer sheath is 17 mm to 19 mm.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The inner conductor is coated with a cross-linked fluororubber longitudinal hole insulator with a longitudinal hole structure, which effectively separates the inner conductor from the center conductor and the control core, reduces contact friction, and reduces stress concentration. The cross-linked fluororubber longitudinal hole insulator helps to improve the flexibility and mechanical strength of the cable core, and the cable core structure is balanced and stable. The cross-linked fluororubber longitudinal hole insulator can reduce the lateral pressure and extrusion force of the control core when it is bent, improve the extrusion resistance, and reduce the local stress concentration of the control core, which is conducive to the cable to quickly elastically recover to its original state after bending and extrusion, effectively inhibiting the breakage of the control core caused by deformation, ensuring stable electrical characteristics, and better durability.

[0017] 2. By filling the longitudinal hole with para-type fully aromatic copolyamide stretched fiber core material, the tensile strength is improved, a better circular cross-section is maintained during cable bending, local stress concentration of the control core is reduced, the control core conductor breakage is suppressed, and durability is improved.

[0018] 3. By adding a para-type fully aromatic copolyamide stretched fiber plain woven mesh with a tensile strength of more than 5000MPa between the cross-linked fluororubber longitudinal hole insulator and the polyurethane outer sheath, the tensile strength of the cable is enhanced, the cross-linked fluororubber longitudinal hole insulator is protected, and the cross-linked fluororubber longitudinal hole insulator is prevented from adhering to the polyurethane outer sheath, so that the durability of the cable is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0021] In the figure: 1-inner conductor, 2-cross-linked fluororubber longitudinal hole insulator, 3-para-type wholly aromatic copolyamide stretched fiber plain woven mesh, 4-polyurethane outer sheath, 5-longitudinal hole, 6-neutral conductor, 7-control line core, 8-control line core conductor, 9-XLPE insulation layer, 10-para-type wholly aromatic copolyamide stretched fiber core material. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the utility model, the utility model is further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the utility model.

[0023] See also Figure 1 The compression-resistant elastic recovery airport cable of the embodiment of the utility model comprises an inner conductor 1. Specifically, the inner conductor 1 is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.3 mm, which are coaxially twisted.

[0024] The outer part of the inner conductor 1 is coated with a cross-linked fluororubber longitudinal hole insulator 2, a para-type wholly aromatic copolyamide stretched fiber plain woven mesh 3 and a polyurethane outer sheath 4 in sequence. The cross-linked fluororubber longitudinal hole insulator 2 is provided with six longitudinal holes 5 evenly distributed in the circumference, and the neutral conductor 6 and the control core 7 are separately arranged in different longitudinal holes 5. As shown in the figure, there are eight control cores 7 and they are arranged in two longitudinal holes 5. Furthermore, the longitudinal holes 5 are filled with a para-type wholly aromatic copolyamide stretched fiber core material 10. The neutral conductor 6 is a tinned copper monofilament conductor. The control core 7 includes a control core conductor 8 and an XLPE insulation layer 9. Specifically, the control core conductor 8 is composed of a plurality of oxygen-free copper wires with a wire diameter of 0.01 mm to 0.08 mm twisted together. In one embodiment, the para-type fully aromatic copolyamide stretched fiber flat woven net 3 is an inner and outer double-layer para-type fully aromatic copolyamide stretched fiber strand flat woven net structure, further, the inner layer of the para-type fully aromatic copolyamide stretched fiber strand flat woven net is a flat woven net structure woven by fine para-type fully aromatic copolyamide stretched fiber strands, and the outer layer of the para-type fully aromatic copolyamide stretched fiber strand flat woven net is a flat woven net structure woven by coarse para-type fully aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type fully aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type fully aromatic copolyamide stretched fiber strands. The braiding density of the para-type fully aromatic copolyamide stretched fiber flat woven net 3 is not less than 90%. The outer diameter of the polyurethane outer sheath 4 is 17mm to 19mm.

[0025] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. The extrusion-resistant elastic recovery airport cable is characterized by: The invention comprises an inner conductor (1), the outer portion of which is covered in sequence with a cross-linked fluororubber longitudinal hole insulator (2), a para-type fully aromatic copolyamide stretched fiber plain woven net (3) and a polyurethane outer sheath (4), the cross-linked fluororubber longitudinal hole insulator (2) being provided with six longitudinal holes (5) evenly distributed in the circumferential direction, the neutral conductor (6) and the control core (7) being separately arranged in different longitudinal holes (5), and the control core (7) comprising a control core conductor (8) and an XLPE insulation layer (9).

2. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized in that: The inner conductor (1) is composed of a plurality of tinned copper monofilaments having a wire diameter of 0.05 mm to 0.3 mm, which are coaxially twisted.

3. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized in that: The neutral conductor (6) is a tinned copper monofilament conductor.

4. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized in that: The control line core conductor (8) is composed of a plurality of oxygen-free copper wires with a wire diameter of 0.01 mm to 0.08 mm twisted together.

5. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized by: The para-type wholly aromatic copolyamide stretched fiber plain woven net (3) is a plain woven net structure of inner and outer double layers of para-type wholly aromatic copolyamide stretched fiber strands.

6. The compression-resistant elastic recovery type airport cable according to claim 5 is characterized by: The inner layer of the flat woven mesh of the para-type wholly aromatic copolyamide stretched fiber strands is a flat woven mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the flat woven mesh of the para-type wholly aromatic copolyamide stretched fiber strands is a flat woven mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

7. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized by: The weaving density of the para-type wholly aromatic copolyamide stretched fiber plain weave (3) is not less than 90%.

8. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized by: There are eight control wire cores (7) which are separately disposed in the two longitudinal holes (5).

9. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized by: The longitudinal holes (5) are filled with para-type wholly aromatic copolyamide stretched fiber core material (10).

10. The compression-resistant elastic recovery type airport cable according to claim 1 is characterized by: The outer diameter of the polyurethane outer sheath (4) is 17 mm to 19 mm.

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