Broken-line-inhibiting airport cable with shielding control line

Abstract

The utility model discloses an airport cable capable of inhibiting wire breakage and provided with shielding control wires, which comprises seven power wire cores, six control wire cores and a para-position type wholly aromatic copolyamide stretched fiber filling core material which are jointly twisted to form a cable core, and the cable core is sequentially coated with a PTFE (Polytetrafluoroethylene) semi-directional belt wrapping antifriction layer and a PUR (Polyurethane) outer sheath, the control wire core comprises a wire core body formed by twisting three insulated wires, the wire core body is coated with a metal wire mixed-weaving sub-shielding layer, the metal wire mixed-weaving sub-shielding layer is formed by reversely and spirally winding and weaving an inner-layer aluminum-magnesium wire and an outer-layer tinned copper wire, the wire diameter of the tinned copper wire is larger than that of the aluminum-magnesium wire, the outer diameter of the control wire core is 2mm to 2.4 mm, and the outer diameter of the PUR outer sheath is 37mm to 45mm. According to the cable, the cable core structure is round and balanced, the bending resistance is better, the optimized shielding layer structure is beneficial to inhibiting wire breakage, the stable shielding performance is ensured, and the durability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an airport cable with a shielded control line that can suppress wire breakage. Background Art

[0002] The 7-core airport cable with shielded 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 tubes. Its cabling method is concentric twisting of power line core and shielded control line. The shielding layer of shielded control line mostly adopts copper wire braided shielding layer structure. The copper wire diameter is generally not more than 0.18mm. The large amount of copper wire will increase the cable cost. The aluminum wire braided shielding structure is adopted. Although the cost of aluminum wire is much lower than that of copper wire, the rigidity of aluminum wire is weaker than that of copper wire. When the bending angle of laying is small, it is particularly easy to break the wire of the shielding layer. The stability of the shielding effect is poor, which affects the electrical characteristics of the cable. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and aims to solve the technical problem of providing an airport cable with a shielded control line that can suppress wire breakage. The cable core structure is round and balanced, and has better bending resistance. The optimized shielding layer structure helps to suppress wire breakage, ensure stable shielding performance, and improve durability.

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

[0005] The cable is a shielded control line airport cable with anti-breakage type, comprising seven power cores and six control cores twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material to form a cable core, the cable core is coated with a PTFE semi-directional tape wrapped anti-friction layer and a PUR outer sheath in sequence, the power core comprises a power core conductor and a thermoplastic polyester insulation layer, the control core comprises three insulated wires twisted to form a core body, the core body is coated with a metal wire mixed shielding layer, the metal The mixed-braided sub-shielding layer is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are woven in counter-rotating spirals. The wire diameter of the tinned copper wire is 0.06mm to 0.18mm, and the wire diameter of the aluminum-magnesium wire is 0.05mm to 0.15mm. The wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire. The metal wire mixed-braided sub-shielding layer is coated with insulating lubricating silicone grease. The outer diameter of the control wire core is 2mm to 2.4mm, and the outer diameter of the PUR outer sheath is 37mm to 45mm.

[0006] Preferably, the power line core conductor is composed of a number of tinned copper monofilaments with a wire diameter of 0.05mm to 0.01mm twisted together concentrically.

[0007] Preferably, the outer diameter of the power line core is 9.5 mm to 12 mm.

[0008] Preferably, the insulated wire comprises an inner conductor and an XLPE insulation layer.

[0009] Preferably, the inner conductor is formed by twisting a plurality of oxygen-free copper wires with a wire diameter of 0.02 mm to 0.08 mm.

[0010] Preferably, the lay length of the oxygen-free copper wire is 5 to 15 times the wire diameter of the oxygen-free copper wire.

[0011] Preferably, the lay direction of the wire core is opposite to that of the cable core.

[0012] Preferably, the PTFE semi-oriented tape wrapped anti-friction layer has a thickness of 0.1 mm to 0.2 mm.

[0013] Preferably, the PTFE semi-directional tape wrapped friction reduction layer is a PTFE semi-directional tape overlapping wrapped structure, and the winding direction is opposite to the cable core twisting direction.

[0014] Preferably, the wire diameter of the tinned copper wire is not less than 1.2 times the wire diameter of the aluminum-magnesium wire.

[0015] Beneficial effects of the utility model:

[0016] 1. Optimize the shielding layer structure of the control line core, replace the original single copper wire or aluminum wire braiding structure, adopt tinned copper wire and aluminum-magnesium wire mutually reverse spiral winding braiding structure, reduce the amount of tinned copper wire, help reduce cable costs, tinned copper wire has strong rigidity and better conductivity, aluminum-magnesium wire is weaker than tinned copper wire, the shielding layer formed by tinned copper wire and aluminum-magnesium wire mutually reverse spiral winding braiding takes into account flexibility and rigidity, the tinned copper wire in the outer layer has a larger diameter than the aluminum-magnesium wire in the inner layer, which is beneficial to suppress the breakage of the shielding layer when bending at a smaller angle, the shielding layer is coated with insulating lubricating silicone grease to obtain a friction-reducing effect, slow down the friction between the tinned copper wire and the aluminum-magnesium wire, help reduce friction stress, suppress breakage, and have stronger adaptability to the laying environment, ensuring the stability of the shielding performance and better durability.

[0017] 2. The power core and control core are twisted together with the para-type fully aromatic copolyamide stretched fiber filling core material to form a cable core. The cable core structure is more rounded and balanced, which helps to reduce the load on each core, helps to alleviate the lateral pressure when the cable is bent, and improves the bending resistance. In addition, the PTFE semi-directional tape wrapped anti-friction layer has an excellent anti-friction effect and low sliding friction resistance, which helps to suppress the occurrence of broken wires in the control core shielding layer, ensure stable electrical properties, and improve durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model.

[0019] In the figure: 1-power line core, 2-control line core, 3-para-type fully aromatic copolyamide stretched fiber filling core material, 4-PTFE semi-oriented tape wrapped anti-friction layer, 5-PUR outer sheath, 6-power line core conductor, 7-thermoplastic polyester insulation layer, 8-insulated wire, 9-metal wire mixed shielding layer, 10-inner conductor, 11-XLPE insulation layer. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0021] like Figure 1 As shown, the shielded control line airport cable with anti-breakage type of the embodiment of the utility model comprises seven power cores 1 and six control cores 2 twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material 3 to form a cable core. The power core 1 comprises a power core conductor 6 and a thermoplastic polyester insulation layer 7. Specifically, the power core conductor 6 is composed of a number of tinned copper monofilaments with a wire diameter of 0.05mm to 0.01mm concentrically twisted. The outer diameter of the power core 1 is 9.5mm to 12mm. The control core 2 comprises three insulated wires 8 twisted to form a wire core body. In one embodiment, the insulated wire 8 comprises an inner conductor 10 and an XLPE insulation layer 11. Further, the inner conductor 10 is composed of a number of oxygen-free copper wires with a wire diameter of 0.02mm to 0.08mm twisted together. Furthermore, the oxygen-free copper wire lay is 5 to 15 times the wire diameter of the oxygen-free copper wire. The lay direction of the wire core body is opposite to that of the cable core. The outer part of the wire core is coated with a metal wire mixed shielding layer 9, which is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are mutually reversely spirally wound and woven. The wire diameter of the tinned copper wire is 0.06mm to 0.18mm, and the wire diameter of the aluminum-magnesium wire is 0.05mm to 0.15mm. The wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire. Furthermore, the wire diameter of the tinned copper wire is not less than 1.2 times the wire diameter of the aluminum-magnesium wire. The metal wire mixed shielding layer 9 is coated with insulating lubricating silicone grease, and the outer diameter of the control wire core 2 is 2mm to 2.4mm.

[0022] The cable core is coated with a PTFE semi-directional tape wrapped anti-friction layer 4 and a PUR outer sheath 5 in sequence. The thickness of the PTFE semi-directional tape wrapped anti-friction layer 4 is 0.1 mm to 0.2 mm. In one embodiment, the PTFE semi-directional tape wrapped anti-friction layer 4 is a PTFE semi-directional tape overlapping wrapped structure and the winding direction is opposite to the cable core twisting direction. The outer diameter of the PUR outer sheath 5 is 37 mm to 45 mm.

[0023] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. The airport cable with shielded control line to inhibit wire breakage is characterized by: The invention comprises seven power line cores (1) and six control line cores (2) twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material (3) to form a cable core, the outer part of the cable core is coated with a PTFE semi-directional tape wrapped anti-friction layer (4) and a PUR outer sheath (5) in sequence, the power line core (1) comprises a power line core conductor (6) and a thermoplastic polyester insulation layer (7), the control line core (2) comprises three insulating wires (8) twisted together to form a line core body, the outer part of the line core body is coated with a metal wire mixed shielding layer (9), the The metal wire mixed shielding layer (9) is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are mutually reversely spirally wound and woven, the wire diameter of the tinned copper wire is 0.06 mm to 0.18 mm, the wire diameter of the aluminum-magnesium wire is 0.05 mm to 0.15 mm, the wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire, the metal wire mixed shielding layer (9) is coated with insulating lubricating silicone grease, the outer diameter of the control wire core (2) is 2 mm to 2.4 mm, and the outer diameter of the PUR outer sheath (5) is 37 mm to 45 mm.

2. The anti-breakage type shielded control line airport cable according to claim 1 is characterized by: The power line core conductor (6) is composed of a plurality of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.01 mm, which are coaxially twisted.

3. The anti-breakage type shielded control line airport cable according to claim 1 is characterized by: The outer diameter of the power line core (1) is 9.5 mm to 12 mm.

4. The anti-breakage type shielded control line airport cable according to claim 1 is characterized by: The insulated wire (8) comprises an inner conductor (10) and an XLPE insulation layer (11).

5. The anti-breakage type shielded control line airport cable according to claim 4 is characterized by: The inner conductor (10) is composed of a plurality of oxygen-free copper wires having a wire diameter of 0.02 mm to 0.08 mm twisted together.

6. The anti-breakage type shielded control line airport cable according to claim 5 is characterized by: The oxygen-free copper wire lay length is 5 to 15 times the wire diameter of the oxygen-free copper wire.

7. The anti-breakage type shielded control line airport cable according to claim 1 is characterized by: The lay direction of the wire core is opposite to that of the cable core.

8. The anti-breakage type shielded control line airport cable according to claim 1 is characterized by: The PTFE semi-oriented tape wrapped anti-friction layer (4) has a thickness of 0.1 mm to 0.2 mm.

9. The anti-breakage type shielded control line airport cable according to claim 1, characterized in that: The PTFE semi-directional tape wrapped anti-friction layer (4) is a PTFE semi-directional tape overlapping wrapped structure, and the winding direction is opposite to the twisting direction of the cable core.

10. The anti-breakage type shielded control line airport cable according to claim 1, characterized in that: The wire diameter of the tinned copper wire is not less than 1.2 times the wire diameter of the aluminum-magnesium wire.

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