Bending-resistant cable

Abstract

The utility model belongs to the technical field of cable production and application, and particularly relates to a bending-resistant cable. The cable body comprises a plurality of conductive wire cores and further comprises a middle rubber rope, the conductive wire cores are arranged around the middle rubber rope, the conductive wire cores are wrapped by a filling layer, the plurality of conductive wire cores are wrapped by the filling layer, the filling layer is wrapped by a flame-retardant rubber layer, and the flame-retardant rubber layer is wrapped by a flame-retardant rubber layer. According to the utility model, the arrangement of the middle rubber rope is utilized, the gaps between the conductive wire cores are increased, and the polyethylene foam material is filled, so that the internal space is compressed in the bending process, thereby avoiding the fracture of the external sheath layer, and improving the bending performance of the cable. Meanwhile, in cooperation with constraint of the rubber rope, the tensile property is improved, meanwhile, a gap for deformation of the cable is provided, and then the anti-bending effect of the cable is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable production and application, and particularly relates to a bending-resistant cable. Background Art

[0002] Cable: usually composed of several or several groups of wires. Usually a rope-like cable made of several or several groups of wires (at least two in each group), each group of wires is insulated from each other and often twisted around a center, with a highly insulating covering layer on the outside. The cable has the characteristics of being powered inside and insulated outside.

[0003] In current use, due to environmental and space issues, the cable needs to be bent during use, and may even be bent repeatedly. Such repeated bending can easily cause the insulation layer outside the conductor to break, thereby causing safety hazards. Utility Model Content

[0004] The utility model aims at the technical problem that the existing cables are not resistant to bending, and proposes a bending-resistant cable which has reasonable design, simple structure, convenient processing and can effectively improve the bending-resistant effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the utility model provides a bending-resistant cable, including a cable body, the cable body including a plurality of conductive cores, and also including an intermediate rubber rope, the conductive cores are arranged around the intermediate rubber rope, the conductive cores are wrapped with a filling layer, the filling layer wraps the plurality of conductive cores inside, the filling layer is wrapped with a flame-retardant rubber layer, a plurality of parallel rubber ropes are wound around the flame-retardant rubber layer, adjacent rubber ropes are arranged at intervals, the rubber rope is covered with a sheath layer, wherein the filling layer is a polyethylene foam material, the intermediate rubber rope and the rubber rope both include a polyester rope arranged in the middle and a thermoplastic elastomer wrapped outside the polyester rope.

[0006] Preferably, a polyester mesh is provided in the sheath layer.

[0007] Preferably, annular grooves are provided on the side walls of the middle rubber rope, and the annular grooves are arranged at intervals on the middle rubber rope.

[0008] Compared with the prior art, the advantages and positive effects of the utility model are:

[0009] 1. The utility model provides a bending-resistant cable, which increases the gap between the conductive cores by setting an intermediate rubber rope, and is filled with polyethylene foam material to compress the internal space during the bending process, thereby avoiding the rupture of the external sheath layer. At the same time, the binding of the rubber rope improves the tensile performance while providing a gap for deformation, thereby improving the anti-bending effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0011] Figure 1 A schematic diagram of the structure of the bending-resistant cable provided in Example 1;

[0012] Figure 2 A cross-sectional view of the bending-resistant cable provided in Example 1;

[0013] Figure 3 A schematic diagram of the structure of the intermediate rubber rope provided in Example 1;

[0014] In the above figures, 1, conductive core; 2, middle rubber rope; 21, polyester rope; 22, thermoplastic elastomer; 221, annular groove; 3, filling layer; 4, flame retardant rubber layer; 5, rubber rope; 6, sheath layer; 7, polyester net. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0017] Embodiment 1, as Figure 1 to Figure 3 As shown, this embodiment aims to provide a cable with good anti-bending effect to reduce the potential safety hazard caused by the breakage of the outer layer of the cable due to bending. To this end, the anti-bending cable provided in this embodiment includes a cable body, the cable body includes a plurality of conductive cores 1, and the conductive core 1 includes two parts, one part is a conductor and an insulating layer sheathed outside the conductor. The above structure is a common structure of existing cables, so it is not described in detail in this embodiment.

[0018] Considering that the main reason for the breakage of the cable jacket is bending and extrusion, reducing the extrusion can effectively avoid the problem of jacket breakage. For this reason, in this embodiment, the provided cable also includes an intermediate rubber rope 52, and the conductive core 1 is arranged around the intermediate rubber rope 52. The purpose of such arrangement is mainly to increase the spacing between the conductor cores. At the same time, the elastic characteristics of the intermediate rubber rope 52 are utilized to achieve internal extrusion.

[0019] In order to fix the conductive core 1, the conductive core 1 needs to be wrapped. For this purpose, a filling layer 3 is wrapped around the conductive core 1, and the filling layer 3 wraps several conductive cores 1. Similarly, in order to give the conductive core 1 space when bending, in this embodiment, the filling layer 3 is a polyethylene foam material. In this way, the conductive core 1 is wrapped by extruding the polyethylene foam material. Due to the wrapping process, the polyethylene foam material containing a large number of holes is filled between the conductive cores 1. In this way, during the bending process, the polyethylene foam material will be squeezed to avoid external extrusion.

[0020] Taking into account the flame retardant effect that the cable should have, in this embodiment, the filling layer 3 is wrapped with a flame retardant rubber layer 4, and the material of the flame retardant rubber layer 4 is flame retardant rubber. In this embodiment, flame retardant rubber is used instead of the existing commonly used inorganic cloth winding method mainly to avoid the problem of space gap being compressed due to winding. In this way, the flame retardant effect is guaranteed and the extrusion of the filling layer 3 is avoided.

[0021] In order to improve the strength of the entire cable and further increase the compressible internal space, in this embodiment, a plurality of parallel rubber ropes 5 are wound around the flame retardant rubber layer 4, and adjacent rubber ropes 5 are spaced apart.

[0022] The middle rubber rope 52 and the rubber rope 5 both include a polyester rope 21 arranged in the middle and a thermoplastic elastomer 22 wrapped outside the polyester rope 21. In this way, the polyester rope 21 provides the strength required for bending, while the thermoplastic elastomer 22 is used to achieve compression, and the interval arrangement itself also retains a certain space for compression.

[0023] A sheath layer 6 is provided on the outer surface of the rubber rope 5, and the sheath layer 6 can be a commonly used polyethylene sheath material. In this embodiment, in order to improve the tensile strength of the sheath layer 6, a polyester net 7 is provided in the sheath layer 6. The polyester net 7 is a mesh structure formed by woven polyester ropes vertically and horizontally. In this way, the possibility of cracking of the sheath layer 6 is avoided by the provision of the polyester net 7, and the safety of use is ensured.

[0024] At the same time, in order to further facilitate internal compression, an annular groove 221 is provided on the side wall of the middle rubber rope 52, and the annular grooves 221 are arranged at intervals on the middle rubber rope 52. In this way, during the bending process, the middle rubber rope 52 has more space to be squeezed, thereby avoiding squeezing of the sheath layer 6, thereby ensuring the tensile strength of the entire cable.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A bending-resistant cable, comprising a cable body, wherein the cable body comprises a plurality of conductive cores, characterized in that: It also includes an intermediate rubber rope, the conductive core is arranged around the intermediate rubber rope, the conductive core is wrapped with a filling layer, the filling layer wraps several conductive cores inside, the filling layer is wrapped with a flame retardant rubber layer, a plurality of parallel rubber ropes are wound around the flame retardant rubber layer, adjacent rubber ropes are arranged at intervals, the rubber rope is covered with a sheath layer, wherein the filling layer is a polyethylene foam material, and the intermediate rubber rope and the rubber rope both include a polyester rope arranged in the middle and a thermoplastic elastomer wrapped outside the polyester rope.

2. A bending-resistant cable according to claim 1, characterized in that: A polyester mesh is arranged in the sheath layer.

3. A bending-resistant cable according to claim 2, characterized in that: An annular groove is arranged on the side wall of the middle rubber rope, and the annular groove is arranged at intervals on the middle rubber rope.

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