Special cable for electric coil steel clamp

Abstract

The utility model relates to a special cable for an electric coil steel clamp, and belongs to the technical field of cables. According to the technical scheme, a nitrile rubber filling layer (2) is arranged outside a center steel wire rope (1) to form a wire core, a plurality of insulating wire cores are evenly arranged outside the wire core in the circumferential direction to form a cable core, and a belting layer (6) and a butyl silicon outer protection layer (7) are sequentially arranged outside the cable core; each insulating wire core is formed by extruding a butyl silicon insulating layer (5) outside a composite tensile conductor. The beneficial effects of the utility model are that the central steel wire rope and the composite tensile conductors are adopted, so that the tensile performance of the cable is improved; the modified butyl silicon material is adopted for insulation, so that the temperature resistance of a traditional cable is improved, the cable can resist the high temperature of 160 DEG C and the low temperature of-30 DEG C, and the anti-aging performance of the cable is improved; and by adopting the modified butyl silicon material sheath, the flame retardant property of the butyl silicon material is improved, the service life of the cable is prolonged, and the use safety of the cable is improved.

Description

Technical Field

[0001] The utility model relates to a special cable for electric steel coiling clamps and belongs to the technical field of cables. Background Art

[0002] The electric steel coil clamp is powered by electricity and is used to hoist steel coils in steel plants. The supporting cable of the electric steel coil clamp moves repeatedly with the steel coil clamp. At present, the supporting cable of the electric steel coil clamp has a short service life due to core breakage and aging of the insulation sheath. After a certain period of use, the insulation core of the cable is prone to core breakage. At the same time, since the cable is in a high temperature environment around the steel coil for a long time, the insulation and sheath are prone to aging and cracking, which poses a safety hazard. Utility Model Content

[0003] The utility model aims to provide a special cable for electric steel winding clamps, which improves the tensile resistance of the cable by adding tensile element steel wire inside the conductor and the center of the cable; adopts modified butyl silicone insulation and butyl silicone sheath to improve the anti-aging performance and service life of the cable, and solves the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A special cable for electric steel winding clamps, comprising a central steel wire rope, a nitrile rubber filling layer, a composite tensile-resistant conductor, a silicone insulating layer, a tape layer and a silicone outer sheath. The nitrile rubber filling layer is arranged outside the central steel wire rope to form a wire core, and a plurality of insulating wire cores are evenly arranged along the circumferential direction outside the wire core to form a cable core. The tape layer and the silicone outer sheath are arranged in sequence outside the cable core; the insulating wire core is formed by extruding a silicone insulating layer outside a composite tensile-resistant conductor.

[0006] The composite tensile conductor is composed of a central twisted steel wire and an outer layer of twisted copper wires, and the outer layer of twisted copper wires is arranged outside the central twisted steel wires.

[0007] The central twisted steel wire has a diameter of 1.0 mm and is composed of 49 low-carbon stainless steel wires with a diameter of 0.1 mm; the 49 low-carbon stainless steel wires are twisted together in a 7×7 twisting manner, specifically: first, 7 0.1 mm stainless steel wires are twisted together in a 1+6 concentric manner, and then the 7 strands of twisted steel wires are compressed and twisted together in a 1+6 concentric manner.

[0008] The outer layer of twisted copper wires is composed of 52 oxygen-free copper wires with a diameter of 0.25 mm. Specifically, the 52 oxygen-free copper wires are concentrically twisted in three layers of 13+16+23 outside a central twisted steel wire with a diameter of 1.0 mm. The twisted diameter is 2.4 mm, the copper conductor twisted pitch diameter ratio is 12-14 times, the outermost layer is twisted in the left direction, and the adjacent layers are twisted in the opposite direction.

[0009] The central steel wire rope has a diameter of 3.0 mm and is formed by concentrically twisting 19 low-carbon stainless steel wires with a diameter of 0.6 mm; the 19 low-carbon stainless steel wires with a diameter of 0.6 mm are concentrically twisted together in a 1+6+12 manner, and the breaking force of the steel wire rope is ≥8.12 kN.

[0010] The thickness of the nitrile rubber filling layer is 3.0 mm-5.0 mm, and the nitrile rubber filling layer is a nitrile rubber elastomer.

[0011] The butyl silicon insulating layer is made of modified butyl silicon material insulation.

[0012] The wrapping layer is a high temperature resistant alkali-free glass cloth wrapping layer.

[0013] The butadiene silicon outer sheath is a sheath made of modified butadiene silicon material.

[0014] The beneficial effects of the utility model are as follows: the central steel wire rope and the composite tensile conductor are used to improve the tensile performance of the cable; the modified butyl silicone material is used for insulation to improve the temperature resistance of the traditional cable, which is resistant to high temperatures of 160 degrees and low temperatures of -30 degrees, thereby improving the anti-aging performance of the cable; the modified butyl silicone material sheath is used to increase the flame retardant performance of the butyl silicone material, thereby improving the service life and safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] In the figure: central steel wire rope 1, nitrile rubber filling layer 2, central twisted steel wire 3, outer twisted copper wire 4, NBR insulation layer 5, tape layer 6, NBR outer sheath 7. DETAILED DESCRIPTION

[0017] The present invention will be further described below through examples in conjunction with the accompanying drawings.

[0018] A special cable for electric steel winding clamps, comprising a central steel wire rope 1, a nitrile rubber filling layer 2, a composite tensile conductor, a silicone insulating layer 5, a tape layer 6 and a silicone outer sheath 7. The nitrile rubber filling layer 2 is extruded on the outside of the central steel wire rope 1 to form a wire core, and a plurality of insulating wire cores are evenly arranged along the circumferential direction outside the wire core to form a cable core. A tape layer 6 is wrapped around the cable core, and a silicone outer sheath 7 is extruded on the tape layer 6; the insulated wire core is formed by extruding a silicone insulating layer 5 on the outside of a composite tensile conductor.

[0019] The composite tensile conductor is composed of a central twisted steel wire 3 and an outer layer of twisted copper wires 4 , and the outer layer of twisted copper wires 4 is arranged outside the central twisted steel wire 3 .

[0020] The central twisted steel wire 3 has a diameter of 1.0 mm and is specifically composed of 49 0.1 mm low-carbon stainless steel wires; the 49 low-carbon stainless steel wires are twisted together in a 7×7 twisting manner, specifically: first, 7 0.1 mm stainless steel wires are twisted together in a 1+6 concentric manner, and then the 7 strands of twisted steel wires are compressed and twisted together in a 1+6 concentric manner.

[0021] The outer layer twisted copper wire 4 is composed of 52 0.25 mm oxygen-free copper wires, specifically: the 52 oxygen-free copper wires are concentrically twisted in three layers of 13+16+23 outside the central twisted steel wire with a diameter of 1.0 mm, the twisting diameter is 2.4 mm, the copper conductor twisting pitch diameter ratio is 12-14 times, the outermost layer is twisted in the left direction, and the adjacent layers are twisted in the opposite direction.

[0022] The central steel wire rope 1 has a diameter of 3.0 mm, specifically 19 0.6 mm low-carbon stainless steel wires, which are concentrically twisted together in a 1+6+12 manner, and the breaking force of the steel wire rope is ≥8.12 kN.

[0023] The extruded thickness of the nitrile rubber filling layer 2 is 3.0 mm to 5.0 mm, and is specifically a nitrile rubber elastomer. When the central steel wire rope is subjected to stress, it will not only generate tension, but also generate bending and torsion stress.

[0024] The butyl silicon insulating layer 5 is made of modified butyl silicon material insulation.

[0025] The wrapping layer 6 is a high temperature resistant alkali-free glass cloth wrapping layer.

[0026] The butadiene silicon outer sheath 7 is a sheath made of modified butadiene silicon material.

[0027] In this embodiment, the central steel wire rope 1 is twisted by 19 0.6mm low-carbon stainless steel wires, and the breaking force of the central steel wire rope is ≥8.12kN. When the electric steel winding clamp is in operation, the central tensile element central steel wire rope is first subjected to force to protect the entire cable from tensile damage. The central steel wire rope is extruded with a nitrile rubber filling layer 2. The nitrile rubber filling layer has good softness, good elasticity, and good buffering performance. It can not only be used as a central filling to ensure that the cable is round, but also protect the insulating core from damage by the central steel wire rope. The concentric positive and negative composite tensile structure outside the central steel wire rope has a copper conductor twisted pitch ratio of 12-14 times, which improves the stability of the composite conductor; the composite tensile conductor is composed of a central twisted steel wire 3 and an outer layer of twisted copper wire 4. The use of a composite tensile conductor further improves the tensile performance of the cable, and also solves the problem that the insulating core will not be easily broken due to tension. The composite tensile conductor is extruded with modified butyl silicone insulation. The modified butyl silicone insulation not only has good electrical insulation performance, good softness, wear resistance, and tensile resistance, but also improves the temperature resistance of traditional cables, with a high temperature resistance of 160 degrees and a low temperature resistance of -30 degrees, which improves the anti-aging performance of the cable. Several butyl silicone insulated cores are cabled, and the cable is wrapped with a high temperature resistant alkali-free glass cloth tape layer. The alkali-free glass cloth tape not only has good mechanical properties, but also has excellent flame retardant and high temperature resistance. The cable tape layer is extruded with a modified butyl silicone sheath. The modified butyl silicone sheath increases the flame retardant properties of the butyl silicone material on the basis of ensuring the mechanical properties and high temperature resistance, thereby improving the service life and safety of the cable.

Claims

1. A special cable for electric steel coil clamps, characterized by: The cable comprises a central steel wire rope (1), a nitrile rubber filling layer (2), a composite tensile-resistant conductor, a silicone insulating layer (5), a tape layer (6) and a silicone outer sheath (7); the nitrile rubber filling layer (2) is arranged outside the central steel wire rope (1) to form a wire core; a plurality of insulating wire cores are evenly arranged along the circumferential direction outside the wire core to form a cable core; and a tape layer (6) and a silicone outer sheath (7) are arranged in sequence outside the cable core; and the insulating wire core is formed by extruding a silicone insulating layer (5) outside the composite tensile-resistant conductor.

2. A special cable for electric steel coil clamps according to claim 1, characterized in that: The composite tensile conductor is composed of a central twisted steel wire (3) and an outer layer of twisted copper wires (4), wherein the outer layer of twisted copper wires (4) is arranged outside the central twisted steel wire (3).

3. A special cable for electric steel coil clamps according to claim 2, characterized in that: The central twisted steel wire (3) has a diameter of 1.0 mm and is composed of 49 low-carbon stainless steel wires with a diameter of 0.1 mm.

4. A special cable for electric steel coil clamps according to claim 3, characterized in that: The outer layer of twisted copper wires (4) consists of 52 oxygen-free copper wires with a diameter of 0.25 mm.

5. A special cable for electric steel coiling clamps according to claim 1 or 2, characterized in that: The central steel wire rope (1) has a diameter of 3.0 mm and is formed by concentrically twisting 19 low-carbon stainless steel wires with a diameter of 0.6 mm.

6. A special cable for electric steel coiling clamps according to claim 1 or 2, characterized in that: The thickness of the nitrile rubber filling layer (2) is 3.0 mm to 5.0 mm, and the nitrile rubber filling layer (2) is a nitrile rubber elastomer.

7. A special cable for electric steel coiling clamps according to claim 1 or 2, characterized in that: The butyl silicon insulating layer (5) is a modified butyl silicon material insulation.

8. A special cable for electric steel coiling clamps according to claim 1 or 2, characterized in that: The wrapping layer (6) is a high temperature resistant alkali-free glass cloth wrapping layer.

9. A special cable for electric steel coiling clamps according to claim 1 or 2, characterized in that: The butadiene silicon outer protective layer (7) is a modified butadiene silicon material sheath.

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