Impact-resistant water-blocking filling type multi-core reel flat cable

Abstract

The utility model discloses an anti-impact water-blocking filling type multi-core reel flat cable, which comprises a flat silicon rubber insulation isolation core body, five longitudinal holes are uniformly distributed on the silicon rubber insulation isolation core body in a row, three power wire cores and two signal wire cores are sleeved in the five longitudinal holes in a staggered and clearance manner, petroleum jelly is filled in the clearance of the longitudinal holes, and the power wire cores and the signal wire cores are arranged in the longitudinal holes in a staggered and clearance manner. A double-layer polyethylene longitudinal wrapping water-blocking isolating layer, a butyronitrile polyvinyl chloride inner sheath layer, an AFRP reinforced weaving tensile layer, a butyronitrile polyvinyl chloride outer sheath layer and a galvanized steel wire weaving armor layer are sequentially wrapped outside the silicone rubber insulation isolating core body. The flat cable has the advantages of high mechanical strength of each wire core, good impact resistance, better moisture-proof and waterproof performance, excellent wear resistance, avoidance of wear and cracking of the outer sheath, reduction of potential safety hazards and better durability.

Description

Technical Field

[0001] The present application relates to the technical field of cables, and particularly relates to an impact-resistant and water-blocking filled multi-core drum flat cable. Background Art

[0002] Mine cables are used in mines at various voltage levels, electrical equipment devices, mining equipment, and mining machinery. Mine drum cables are applicable to drag and drum cables with a working voltage of 1.1 / 1.1 KV and below. Under normal working conditions, the cable is repeatedly stretched and bent for a long time. Ordinary mine cables have poor impact resistance. When subjected to slight impact, the structure of the core is prone to deformation, and problems such as core breakage and wire breakage occur. The moisture-proof and water-blocking performance is poor, the outer sheath is easy to wear and crack, the electrical reliability is poor during long-term application, and it is not durable. Utility Model Content

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present application is to provide an impact-resistant and water-blocking filled multi-core drum flat cable, which has high mechanical strength of each core, good impact resistance characteristics, better moisture-proof and waterproof performance, excellent wear resistance, avoids wear and cracking of the outer sheath, reduces potential safety hazards, and has better durability.

[0004] The above technical problem is solved by the following technical solutions in the present application.

[0005] An impact-resistant and water-blocking filled multi-core drum flat cable includes a flat silicone rubber insulated isolation core body. Five longitudinal holes are evenly arranged in a row on the silicone rubber insulated isolation core body. Three power cores and two signal cores are alternately and spacedly sleeved in the five longitudinal holes. Petroleum jelly is filled in the longitudinal hole gaps. A double-layer polyethylene longitudinally wrapped water-blocking isolation layer, a nitrile polyvinyl chloride inner sheath layer, an AFRP reinforced braided tensile layer, a nitrile polyvinyl chloride outer sheath layer, and a galvanized steel wire braided armor layer are sequentially coated outside the silicone rubber insulated isolation core body. The power core includes a power core conductor, an ethylene propylene diene monomer rubber isolation layer, and a polyvinyl chloride insulation layer. The signal core is formed by five groups of star-twisted four-wire groups circumferentially and evenly distributed around a regular pentagon polyurethane elastomer filling core and jointly twisted. The star-twisted four-wire group is composed of four insulated wires twisted. A PTFE semi-oriented tape wrapping anti-friction layer is coated outside the core body.

[0006] Preferably, the distance between the longitudinal holes is not less than 3 mm.

[0007] Preferably, the power core conductor includes a galvanized steel single wire inner core, and multiple layers of tinned copper wire stranded conductor layers are arranged outside the galvanized steel single wire inner core.

[0008] Preferably, the insulated wire includes a solid annealed copper conductor and an XLPE insulation layer.

[0009] Preferably, the AFRP reinforced braided tensile layer is a double-layer aramid yarn structure with reverse spiral winding and braiding inside and outside.

[0010] Preferably, the lay lengths of the five star quad groups are different from each other.

[0011] Preferably, the PTFE semi-oriented tape wrapping antifriction layer is a multi-layer PTFE semi-oriented tape overlapping wrapping structure, and the winding direction is opposite to the winding direction of the insulated wire.

[0012] Preferably, the double-layer polyethylene longitudinally wrapped water-blocking isolation layer is a longitudinal overlapping wrapping structure of double-layer polyethylene water-blocking tapes with an overlapping rate of 40% to 60%. The double-layer polyethylene water-blocking tapes are formed by co-extrusion of an MDPE water-blocking inner layer and an LDPE water-blocking outer layer.

[0013] Preferably, EVA water-blocking adhesive layers are provided on the outer surface of the nitrile polyvinyl chloride inner sheath layer and the inner surface of the nitrile polyvinyl chloride outer sheath layer.

[0014] Preferably, the thickness of the EVA water-blocking adhesive layer is 8 μm to 25 μm.

[0015] Advantages of this application:

[0016] 1. By filling petroleum jelly in the longitudinal hole gaps to prevent longitudinal water seepage, adding the double-layer polyethylene longitudinally wrapped water-blocking isolation layer to prevent water vapor from invading from the outside, and adding EVA water-blocking adhesive layers on the outer surface of the nitrile polyvinyl chloride inner sheath layer and the inner surface of the nitrile polyvinyl chloride outer sheath layer, the performance of blocking water vapor diffusion is enhanced, and the inner and outer sheaths and the AFRP reinforced braided tensile layer are adhesively bonded together as a whole, improving the strength of the sheath layer, protecting the sheath from cracking, enhancing the safety and reliability of the cable, reducing potential safety hazards, and improving durability.

[0017] 2. By sleeving three power cores and two signal cores in the longitudinal holes of the flat silicone rubber insulated isolation core body at intervals respectively, an effective electrical insulation distance is formed and the mechanical strength is ensured. The structure is balanced, which helps to reduce the load borne by each core and improve the impact resistance of the cable. The conductor of the power core is a structure of a galvanized steel monofilament inner core and a multi-layer tinned copper wire stranded conductor layer, which improves the mechanical strength and impact resistance of the inner conductor and helps to prevent the occurrence of broken wires and broken cores. The signal core is separated and stranded by the star quad through the regular pentagon polyurethane elastomer filling core, so that crosstalk will not occur. The structure is more round and balanced. The polyurethane elastomer has good physical and mechanical properties, enhancing the mechanical strength, being beneficial to improving the impact resistance, the core structure is not easy to deform, preventing the occurrence of broken wires and broken cores, ensuring stable and reliable electrical characteristics, and having better durability in use.

[0018] 3. A galvanized steel wire braided armor layer is coated on the outside of the nitrile polyvinyl chloride outer sheath, which greatly improves the impact resistance, avoids friction damage to the outer sheath, improves the wear resistance of the cable, prevents the sheath from cracking, improves the safety and service life of the cable, reduces potential safety hazards, and has better durability. Brief Description of the Drawings

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

[0020] Description of the Reference Numerals:

[0021] 1 - Silicone rubber insulated isolation core, 2 - Longitudinal hole, 3 - Power line core, 4 - Signal line core, 5 - Petroleum jelly, 6 - Double-layer polyethylene longitudinally wrapped water-blocking isolation layer, 7 - Nitrile polyvinyl chloride inner sheath layer, 8 - AFRP reinforced braided tensile layer, 9 - Nitrile polyvinyl chloride outer sheath layer, 10 - Galvanized steel wire braided armor layer, 11 - Power line core conductor, 12 - Ethylene propylene diene monomer rubber isolation layer, 13 - Polyvinyl chloride insulation layer, 14 - Star quad, 15 - Insulated wire, 16 - PTFE semi-oriented tape wrapped anti-friction layer, 17 - Solid annealed copper conductor, 18 - XLPE insulation layer. Detailed Embodiments

[0022] The terms used in the embodiments part of the present application are only used to explain the specific embodiments of the present application, rather than to limit the present application. The embodiments of the present application will be described in detail below in conjunction with the drawings.

[0023] See Figure 1, the impact-resistant and water-blocking filled multi-core reel flat cable according to the embodiments of the present application includes a flat silicone rubber insulated isolation core 1. Five longitudinal holes 2 are evenly arranged in a row on the silicone rubber insulated isolation core 1. Further, the distance between the longitudinal holes 2 is not less than 3 mm. Three power cores 3 and two signal cores 4 are alternately and spacedly sleeved in the five longitudinal holes 2, and petroleum jelly 5 is filled in the gaps of the longitudinal holes 2. The power core 3 includes a power core conductor 11, an ethylene propylene diene monomer rubber isolation layer 12, and a polyvinyl chloride insulation layer 13. Specifically, the power core conductor 11 includes a galvanized steel single-wire inner core, and multiple layers of tinned copper wire stranded conductor layers are arranged outside the galvanized steel single-wire inner core. The signal core 4 is formed by five groups of star-twisted four-wire groups 14 circumferentially and evenly distributed around a regular pentagon polyurethane elastomer filling core and jointly twisted. The twist pitches of the five groups of star-twisted four-wire groups 14 are different. The star-twisted four-wire group 14 is formed by twisting four insulated wires 15. In one embodiment, the insulated wire 15 includes a solid annealed copper conductor 17 and an XLPE insulation layer 18. An outer layer of PTFE semi-oriented tape wrapping anti-friction layer 16 is coated on the outside of the core body. In one embodiment, the PTFE semi-oriented tape wrapping anti-friction layer 16 is a multi-layer PTFE semi-oriented tape overlapping wrapping structure and the winding direction is opposite to the winding direction of the insulated wire 15.

[0024] An outer layer of a double-layer polyethylene longitudinally wrapped water-blocking isolation layer 6, a nitrile polyvinyl chloride inner sheath layer 7, an AFRP reinforced braided tensile layer 8, a nitrile polyvinyl chloride outer sheath layer 9, and a galvanized steel wire braided armor layer 10 are sequentially coated on the outside of the silicone rubber insulated isolation core 1. Further, EVA water-blocking adhesive layers are provided on the outer surface of the nitrile polyvinyl chloride inner sheath layer 7 and the inner surface of the nitrile polyvinyl chloride outer sheath layer 9, and the thickness of the EVA water-blocking adhesive layer is 8 μm to 25 μm. In one embodiment, the double-layer polyethylene longitudinally wrapped water-blocking isolation layer 6 is a double-layer polyethylene water-blocking tape longitudinally overlapping wrapping structure and the overlapping rate is 40% to 60%. The double-layer polyethylene water-blocking tape is formed by co-extruding an MDPE water-blocking inner layer and an LDPE water-blocking outer layer. In one embodiment, the AFRP reinforced braided tensile layer 8 is an inner and outer double-layer aramid yarn reverse spiral winding and braiding structure.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Impact-resistant and water-blocking filled multi-core flat reel cable, characterized in that: It includes a flat silicone rubber insulated isolation core (1). Five longitudinal holes (2) are evenly arranged in a row on the silicone rubber insulated isolation core (1). Three power cores (3) and two signal cores (4) are sleeved in the five longitudinal holes (2) in a staggered and spaced manner. Petroleum jelly (5) is filled in the gaps of the longitudinal holes (2). A double-layer polyethylene longitudinally wrapped water-blocking isolation layer (6), a nitrile polyvinyl chloride inner sheath layer (7), an AFRP reinforced braided tensile layer (8), a nitrile polyvinyl chloride outer sheath layer (9), and a galvanized steel wire braided armor layer (10) are sequentially coated outside the silicone rubber insulated isolation core (1). The power core (3) includes a power core conductor (11), an ethylene propylene diene monomer rubber isolation layer (12), and a polyvinyl chloride insulation layer (13). The signal core (4) is composed of five groups of star-twisted four-wire groups (14) evenly distributed circumferentially around a regular pentagon polyurethane elastomer filling core and jointly twisted to form a core body. The star-twisted four-wire group (14) is formed by twisting four insulated wires (15). A PTFE semi-oriented tape wrapped anti-friction layer (16) is coated outside the core body.

2. The impact-resistant and water-blocking filled multi-core reel flat cable according to claim 1, wherein: The distance between the longitudinal holes (2) is not less than 3 mm.

3. The impact-resistant and water-blocking filled multi-core reel flat cable according to claim 1, wherein: The power core conductor (11) includes a galvanized steel single wire inner core, and multiple layers of tinned copper wire stranded conductor layers are arranged outside the galvanized steel single wire inner core.

4. The impact-resistant and water-blocking filled multi-core flat cable according to claim 1, wherein: The insulated wire (15) includes a solid annealed copper conductor (17) and an XLPE insulation layer (18).

5. The impact-resistant and water-blocking filled multi-core flat cable according to claim 1, wherein: The AFRP reinforced braided tensile layer (8) is a double-layer aramid yarn structure with reverse spiral winding and braiding inside and outside.

6. The impact-resistant and water-blocking filled multi-core coiled flat cable according to claim 1, wherein: The lay lengths of the five groups of star-twisted four-wire groups (14) are different from each other.

7. The impact-resistant and water-blocking filled multi-core coiled flat cable according to claim 1, characterized in that: The PTFE semi-oriented tape wrapped anti-friction layer (16) is a multi-layer PTFE semi-oriented tape overlapping and wrapping structure, and the winding direction is opposite to the winding direction of the insulated wire (15).

8. The impact-resistant and water-blocking filled multi-core flat cable for a reel according to claim 1, characterized in that: The double-layer polyethylene longitudinally wrapped water-blocking isolation layer (6) is a double-layer polyethylene water-blocking tape longitudinally overlapping and wrapping structure with an overlapping rate of 40% to 60%. The double-layer polyethylene water-blocking tape is formed by co-extruding an MDPE water-blocking inner layer and an LDPE water-blocking outer layer.

9. The impact-resistant and water-blocking filled multi-core reel flat cable according to claim 1, characterized in that: EVA water-blocking adhesive layers are provided on the outer surface of the nitrile polyvinyl chloride inner sheath layer (7) and the inner surface of the nitrile polyvinyl chloride outer sheath layer (9).

10. The impact-resistant and water-blocking filled multi-core drum-shaped flat cable according to claim 9, characterized in that: The thickness of the EVA water-blocking adhesive layer is 8 μm to 25 μm.

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