A tensile-resistant flat cable

Abstract

The utility model discloses a tensile-resistant flat cable for traveling. The utility model relates to the technical field of electric wires and cables, specifically a tensile-resistant flat cable for traveling, including a flat sheath, a plurality of cables are arranged in the flat sheath, the plurality of cables are arranged side by side and spaced apart, and reinforcement ribs are respectively arranged on both sides of the plurality of cables, and the plurality of cables include a tensile-resistant reinforcement layer, a conductor, an insulating layer, and a braided reinforcement layer in sequence from the inside to the outside; the reinforcement ribs include a tensile-resistant reinforcement layer, an insulating layer, and a braided reinforcement layer in sequence from the inside to the outside. The cable conductor of the present invention is designed to be a mixed twisted structure of tinned soft copper and composite galvanized soft steel wire rope; the insulation uses a mixture of polyvinyl chloride butadiene nitrile elastomers, which is soft while ensuring its toughness and strength, and can be bent for a long time; the sheath uses a polyurethane elastomer, and the cold resistance can reach ‑60°C; the overall in-line structural design gives the cable excellent mobility, and can complete long-term frequent bending actions.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wires and cables, in particular to a tensile-resistant flat cable for traveling. Background Art

[0002] The connecting cables for cranes, overhead cranes, gantry cranes and other lifting machinery are usually suspended and installed in situations where they are cyclically bent. Ordinary crane cables usually use rubber-sheathed cables, which have good flexibility, but the service life of the cables is still short in situations where they are cyclically bent frequently, which adds an economic burden to customers. In order to solve the problem of short service life of ordinary rubber-sheathed cables as crane cables and meet customers' requirements for cable tensile resistance, wear resistance and cold resistance, this utility model patent proposes a tensile crane flat cable. Utility Model Content

[0003] The utility model aims to provide a tensile-resistant flat cable for use in vehicles, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A tensile-resistant flat cable for driving, characterized in that: it includes a flat sheath 5, a plurality of cables 6 are arranged in the flat sheath 5, the plurality of cables 6 are arranged side by side and spaced apart, and reinforcing ribs 7 are respectively arranged on both sides of the plurality of cables 6, and the plurality of cables 6 include a tensile-resistant reinforcing layer 2, a conductor 1, an insulating layer 3, and a braided reinforcing layer 4 in sequence from the inside to the outside; the reinforcing ribs 7 include a tensile-resistant reinforcing layer 2, an insulating layer 3, and a braided reinforcing layer 4 in sequence from the inside to the outside.

[0006] The conductor 1 adopts the fifth type of tinned soft copper and composite galvanized soft steel wire rope mixed twisted structure required by GB / T 3956-2008. The bundle direction of the tinned soft copper strands is left-handed, the double twist direction is also left-handed, the strand bundle twisting direction is the same as the conductor twisting direction, and a composite galvanized soft steel wire with an outer diameter equivalent to the strand is added at the center of the conductor.

[0007] The insulating layer 3 is extruded from a polyvinyl chloride butadiene-nitrile elastomer mixture.

[0008] The tensile reinforcement layer 2 is made of composite galvanized soft steel wire rope.

[0009] The braided reinforcement layer 4 is made of aramid yarn, and a fiber braided reinforcement layer is arranged outside the insulation layer 3 of the conductive core and the insulation layer 3 of the tensile reinforcement layer.

[0010] The fiber braiding pitch ratio of the braided reinforcement layer 4 is 2-3.

[0011] The flat sheath 5 is made of TPU thermoplastic elastomer material.

[0012] The beneficial effects of the present invention are:

[0013] The invention discloses a tensile-resistant flat cable for traveling, which is suitable for connecting cables for mobile electrical appliances with a rated voltage of 0.6 / 1 kV (Um=1.2 kV) or below and having special requirements such as softness, cold resistance, wear resistance, etc.

[0014] The present invention effectively improves the tensile strength of the conductor by designing the cable conductor to be a mixed structure of tinned soft copper and composite galvanized soft steel wire ropes. Braided aramid yarns are added outside the insulating core and composite galvanized soft steel wire ropes are added on both sides of the cable. The double steel wire rope structure further enhances the tensile strength of the cable. The insulation uses a polyvinyl chloride nitrile elastomer mixture, which is soft while ensuring its toughness and strength, and can be bent for a long time. The sheath uses a polyurethane elastomer with a cold resistance of up to -60°C. The overall in-line structural design gives the cable excellent mobility, and can complete long-term frequent bending actions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] In the figure: conductor 1, tensile reinforcement layer 2, insulation layer 3, braided reinforcement layer 4, flat sheath 5, cable 6, and reinforcement rib 7. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 As shown, the utility model provides a technical solution:

[0019] A tensile-resistant flat cable for driving, characterized in that: it includes a flat sheath 5, a plurality of cables 6 are arranged in the flat sheath 5, the plurality of cables 6 are arranged side by side and spaced apart, and reinforcing ribs 7 are respectively arranged on both sides of the plurality of cables 6, and the plurality of cables 6 include a tensile-resistant reinforcing layer 2, a conductor 1, an insulating layer 3, and a braided reinforcing layer 4 in sequence from the inside to the outside; the reinforcing ribs 7 include a tensile-resistant reinforcing layer 2, an insulating layer 3, and a braided reinforcing layer 4 in sequence from the inside to the outside.

[0020] The conductor 1 adopts the fifth type of tinned soft copper and composite galvanized soft steel wire rope mixed twisted structure required by GB / T 3956-2008. The wire bundling direction of the tinned soft copper strands is left-handed, and the double twisting direction is also left-handed. The strand bundling direction is the same as the conductor twisting direction, which greatly improves the flexibility of the conductor; a composite galvanized soft steel wire equivalent to the outer diameter of the strand is added at the center of the conductor, which not only improves the tensile strength of the cable conductor, but also increases the stability of the conductor; the conductor is tinned to improve its corrosion resistance and extend the service life of the cable. The twisted conductor should not have the phenomenon of missing strands, loose strands and broken strands. The conductor is twisted evenly and tightly, and the surface should be smooth and clean, without defects such as oil stains, burrs, sharp edges, scratches and protrusions.

[0021] The insulating layer 3 is extruded from a mixture of polyvinyl chloride and nitrile elastomer. The addition of nitrile rubber to polyvinyl chloride significantly improves the low temperature resistance, tear resistance, wear resistance and oil resistance of the insulating material.

[0022] The tensile reinforcement layer 2 is made of composite galvanized soft steel wire rope, and the steel wire rope is extruded with a polyvinyl chloride nitrile elastomer mixture, so that the tensile reinforcement layer has the same insulation material as the insulating core.

[0023] The braided reinforcement layer 4 is made of aramid yarn, and a fiber braided reinforcement layer is arranged outside the insulation layer 3 of the conductive core and the insulation layer 3 of the tensile reinforcement layer to enhance the tensile resistance of the cable. The fiber braiding pitch ratio is 2-3.

[0024] The flat sheath 5 is made of TPU thermoplastic elastomer material as a sheath. TPU is a polymer material that has both plastic and rubber properties, showing high elasticity of rubber at room temperature and plasticizing and molding at high temperature. The glass transition temperature of TPU thermoplastic elastomer products is relatively low, and they can still maintain good elasticity, flexibility and other physical properties at low temperatures. The TPU sheath is extruded using a plastic extruder. After extrusion, the surface of the sheath should be smooth and flat, without sharp corners, pitting, burnt or scratched marks, and there should be no visible defects such as bubbles and sand holes on the cross section.

[0025] The present invention can meet the user's requirements for cable tensile resistance and frequent bending; the fifth type of tinned soft copper conductor and composite galvanized soft steel wire rope mixed twisted structure effectively improves the tensile resistance of the conductor, and the conductor strands are twisted in the same direction as the conductor, which greatly improves the flexibility of the conductor and reduces the risk of conductor breaking; the double steel wire rope and fiber braided reinforcement layer composite structure on both sides of the cable further enhances the tensile performance of the cable; the use of TPU thermoplastic elastomer sheath improves the flexibility, wear resistance and low temperature resistance of the cable; the overall in-line structural design gives the cable excellent mobility, and can complete long-term frequent bending actions.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensile driving flat cable, characterized in that: The invention comprises a flat sheath (5), wherein a plurality of cables (6) are arranged in the flat sheath (5), wherein the plurality of cables (6) are arranged side by side and spaced apart, and reinforcing ribs (7) are respectively arranged on both sides of the plurality of cables (6), wherein the plurality of cables (6) comprise, from the inside to the outside, a tensile reinforcement layer (2), a conductor (1), an insulating layer (3), and a braided reinforcement layer (4); and the reinforcing ribs (7) comprise, from the inside to the outside, a tensile reinforcement layer (2), an insulating layer (3), and a braided reinforcement layer (4).

2. The tensile-resistant flat cable according to claim 1, characterized in that: The conductor (1) adopts the fifth type of tinned soft copper strands and composite galvanized soft steel wire rope mixed twisted structure required by GB / T3956-2008, the tinned soft copper strands are bundled in the left direction, the double twisting direction is also left-handed, the strand bundle twisting direction is the same as the conductor twisting direction, and a composite galvanized soft steel wire with a diameter equivalent to the strand outer diameter is added at the center of the conductor.

3. The tensile-resistant flat cable according to claim 1, characterized in that: The insulating layer (3) is extruded from a polyvinyl chloride-nitrile elastomer mixture.

4. The tensile-resistant flat cable according to claim 1, characterized in that: The tensile reinforcement layer (2) is made of composite galvanized soft steel wire rope.

5. The tensile-resistant flat cable according to claim 1, characterized in that: The braided reinforcement layer (4) is made of aramid yarn, and a fiber braided reinforcement layer (4) is arranged outside the insulation layer (3) of the conductive wire core and the insulation layer (3) of the tensile reinforcement layer.

6. The tensile-resistant flat cable according to claim 5, characterized in that: The fiber braiding pitch ratio of the braided reinforcement layer (4) is 2-3.

7. The tensile-resistant flat cable according to claim 1, characterized in that: The flat sheath (5) uses TPU thermoplastic elastomer material as the sheath.

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