Anti-strand-jumping cable

Abstract

The utility model belongs to the technical field of wires and cables, and provides an anti-strand-jumping cable, which comprises at least three core wires, a belting layer and an outer sheath, the core wires at least comprise two specifications, each core wire comprises an insulating layer arranged on the outermost side, zigzag bulges are formed on the outer wall of each insulating layer, the zigzag bulges are arranged at intervals along the axial direction of the core wires, and the outer sheath is arranged on the outer wall of each core wire. The core wire is at least meshed with the zigzag bulge of the other core wire; the belting layer is arranged outside the core wire, and the space between the core wire and the belting layer is filled with filler; and the outer sheath is arranged outside the belting layer. According to the utility model, the core wire is positioned in the outer sheath; secondly, installation and arrangement can be completely carried out according to conventional operation specifications in the process of integrated cabling, so that the difficulty of integrated cabling is reduced, the original arrangement mode can be kept even if the cable is longitudinally extruded or bent, and the strand jumping phenomenon is avoided; the three insulating layers are made of polyvinyl chloride and polyamide nylon materials, the weight of the cable is reduced, and the cable is light in weight.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable technology, specifically to an anti-stretching cable. Background Technology

[0002] Currently, the wire and cable industry occupies a core position in my country's economic landscape, acting as an indispensable lifeline for all sectors. With the government's strong support for the new energy sector, the new energy and equipment wire and cable industry has also ushered in a golden age of vigorous development. While competition within the industry intensifies, it also drives the pursuit of higher quality for wires and cables. They must not only meet basic electrical and mechanical performance standards, but also consider characteristics such as small size, light weight, high mechanical strength, and high reliability.

[0003] Currently, Chinese patent document CN117423498A discloses a mobile cable with anti-deformation and easy shape recovery. It proposes that each core wire has an axial protrusion and / or axial groove on the outside of its insulating sleeve. At their contact point, the axial protrusion of one core wire engages with the axial groove of the other, and the contact structure between the core wires achieves positioning of the core wires within the outer sheath. This effectively prevents deformation under external force and allows for timely recovery after deformation. Similar to traditional methods, conventional cables, due to the complex materials used, result in a large overall weight, especially for multi-core wires and cables that require frequent movement. Handheld electric vehicle charging cables require more manpower and resources for transportation, increasing the difficulty and risk of handling. This is particularly inconvenient in situations requiring rapid movement and operation, such as construction sites and emergency repairs. The weight and volume of traditional cables can be limiting factors. Furthermore, due to the large number of cores in special cables during production, axial trapezoidal protrusions and grooves are added during the cabling process. Each core of different models must be accurately aligned and embedded, which is particularly inconvenient in actual operation. This greatly increases the difficulty of cabling, potentially leading to excessively long installation times, reduced efficiency, and even affecting subsequent work. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-stripping cable, which solves the problem that current anti-stripping cables require precise alignment and embedding of each core wire of different models during cabling, resulting in high cabling difficulty.

[0005] This utility model provides an anti-stretching cable, comprising:

[0006] At least three core wires, the core wires including at least two specifications, the core wires including an outermost insulating layer, the outer wall of the insulating layer having serrated protrusions, the serrated protrusions being arranged at intervals along the axial direction of the core wires, and the core wires engaging with the serrated protrusions of at least one other core wire;

[0007] A wrapping layer is disposed outside the core wire, and the space between the core wire and the wrapping layer is filled with a filler.

[0008] The outer sheath is disposed outside the wrapping layer.

[0009] As can be seen from the above technical solution, the anti-stretch cable provided by this utility model mainly achieves three functions: first, positioning of the core wire inside the outer sheath; second, during the process of cable assembly, it can be arranged according to conventional operating procedures, reducing the difficulty of cable assembly, and even if subjected to longitudinal compression or bending, it will maintain the original arrangement and prevent strand skipping; third, when subjected to external force or longitudinal pressure, even if longitudinal movement occurs, it can be restored in time during bending.

[0010] Optionally, the insulating layer comprises a polyvinyl chloride insulating layer and a polyamide nylon insulating layer from the inside out, and the serrated protrusions are disposed on the polyamide nylon insulating layer.

[0011] As can be seen from the above technical solution, the outer insulation layer is made of polyamide nylon, which pays more attention to improving the structural strength and durability of the cable, and enhances the cable's resistance to external pressure and impact. At the same time, the density of polyamide nylon is lower than that of conventional polyvinyl chloride, which effectively reduces the overall weight of the cable while meeting the basic electrical insulation performance requirements, making it lightweight.

[0012] Optionally, the polyvinyl chloride insulation layer and the polyamide nylon insulation layer are formed by co-extrusion.

[0013] As can be seen from the above technical solutions, the double-layer co-extrusion method focuses more on improving the structural strength and durability of the cable, enhancing the cable's resistance to external pressure and impact on the polyamide. At the same time, the density of polyamide nylon is lower than that of conventional polyvinyl chloride, which effectively reduces the overall weight of the cable while meeting basic insulation and electrical performance requirements, making it more suitable for scenarios requiring lightweight design.

[0014] Optionally, an arcuate groove is formed between the serrated protrusions.

[0015] Optionally, the serrated protrusions and the arcuate grooves cooperate to form a smooth curve.

[0016] As can be seen from the above technical solution, at each contact point, the contacting core wires produce an meshing friction effect through the smooth serrated protrusions along the axial direction of one core wire and the smooth arc-shaped groove along the axial direction of the other core wire.

[0017] By adopting the above technical solution, this application has the following technical effects:

[0018] First, the core wire is positioned inside the outer sheath; second, during the assembly and cabling process, the installation and arrangement can be carried out in accordance with conventional operating procedures, reducing the difficulty of assembly and cabling, and even if subjected to longitudinal compression or bending, it will maintain the original arrangement and will not cause strand jumping; third, when subjected to external force or longitudinal pressure, even if longitudinal movement occurs, it can be restored in time during bending. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 A schematic diagram of an anti-stripping cable provided for an embodiment of this utility model;

[0021] Figure 2 for Figure 1 The image shows an enlarged view of point A in a type of anti-stretching cable.

[0022] Figure 3 for Figure 1 The image shown is an enlarged view of section B of an anti-stretching cable.

[0023] Figure 4 A schematic diagram of the core wire provided in an embodiment of this utility model;

[0024] Figure 5 A schematic diagram of the serrated protrusions provided for an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the arc-shaped groove provided in an embodiment of the present invention.

[0026] Figure label:

[0027] 1-Core wire; 11-Conductor; 12-Insulation layer; 121-Polyvinyl chloride insulation layer; 122-Polyamide nylon insulation layer; 122a-Serrated protrusion; 122b-Arc-shaped groove; 2-Wrapping tape layer; 3-Outer sheath; 4-Filling material. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0030] like Figure 1-4 As shown, this embodiment provides an anti-stripping cable, including at least three core wires 1, a wrapping layer 2, and an outer sheath 3. The core wires 1 include at least two specifications. The core wires 1 include an outermost insulation layer 12, and the outer wall of the insulation layer 12 has serrated protrusions 122a. The serrated protrusions 122a are arranged at intervals along the axial direction of the core wires 1, and the core wires 1 engage with the serrated protrusions 122a of at least one other core wire 1. The wrapping layer 2 is disposed outside the core wires 1, and the core wires 1 and the wrapping layer 2 are filled by a filler 4. The outer sheath 3 is disposed outside the wrapping layer 2.

[0031] Strand skipping occurs when core wires are squeezed during the S / Z direction twisting process in cabling, causing them to skip adjacent core wires to the other side. The core wires 1 are interlocked in a serrated pattern, which primarily achieves: firstly, positioning of core wire 1 within the outer sheath; secondly, allowing for installation and arrangement according to standard operating procedures during cabling, reducing the difficulty of cabling, and maintaining the original arrangement even under longitudinal compression or bending, preventing strand skipping; and thirdly, even if longitudinal movement occurs under external force or longitudinal pressure, it can be promptly restored during bending.

[0032] In one possible implementation, the strands can be arranged in parallel or twisted together, and the serrated protrusions 122a can prevent the movement, bending, or misalignment of the strands when the cable is assembled.

[0033] Optionally, the insulation layer 12 includes a polyvinyl chloride insulation layer 121 and a polyamide nylon insulation layer 122 from the inside out, with serrated protrusions 122a disposed on the polyamide nylon insulation layer 122. The use of polyamide nylon for the outer insulation layer emphasizes the improvement of the cable's structural strength and durability, enhancing the cable's resistance to external pressure and impact. Furthermore, the lower density of polyamide nylon compared to conventional polyvinyl chloride effectively reduces the overall cable weight while meeting basic electrical insulation requirements, resulting in its lightweight characteristics.

[0034] Optionally, the polyvinyl chloride insulation layer 121 and the polyamide nylon insulation layer 122 are formed by double-layer co-extrusion. The tight bonding of the polyvinyl chloride insulation layer 121 and the polyamide nylon insulation layer 122 through double-layer co-extrusion achieves a reduction in the outer diameter of the insulation while meeting the basic electrical insulation performance requirements, thereby reducing the outer diameter of the outer sheath 3 to meet the requirements for lightweight cables.

[0035] During the assembly of core wire 1 into a cable, the engagement of the axial protrusion and the axial groove prevents the core wire 1 from jumping out of strands.

[0036] Optionally, an arcuate groove 122b is formed between the serrated protrusions 122a, and the serrated protrusions 122a and the arcuate groove 122b cooperate to form a smooth curve. Figure 5-6 As shown, arc-shaped grooves 122b are formed between the serrated protrusions 122a, and the two also cooperate to form a smooth curve. At each contact point, the contacting core wires 1 produce an meshing friction effect through the smooth serrated protrusions 122a along the axial direction of one core wire and the smooth arc-shaped grooves 122b along the axial direction of the other core wire. Since the polyamide nylon insulation layer 122 is made of a smooth material, the friction between adjacent core wires 1 is increased, making it less prone to strand misalignment, and thus making the originally regular cable less prone to deformation.

[0037] Specifically, during the assembly and cabling process, the equipment can be arranged in accordance with standard operating procedures, reducing the difficulty of assembling into cables. Even if subjected to longitudinal compression or bending, the original arrangement will be maintained.

[0038] like Figure 5-6 As shown, the extrusion die structure of the polyamide nylon layer is adjusted according to the wire diameter. Each ring has an alternating arrangement of arc-shaped grooves 122b and serrated protrusions 122a, totaling 30-40. The cross-section of the serrated protrusions 122a, along with the dimensions of the arc-shaped grooves 122b and serrated protrusions 122a, are matched to achieve mutual engagement.

[0039] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A jump resistant cable, characterized in that, The application relates to a cable, which comprises: at least three core wires, the core wires comprising at least two specifications, the core wires being provided with an insulating layer at the outermost side, the outer wall of the insulating layer being formed with sawtooth-shaped protrusions, the sawtooth-shaped protrusions being arranged at intervals along the axial direction of the core wires, the core wires being engaged with the sawtooth-shaped protrusions of at least one other core wire; a wrapping layer arranged outside the core wires, the core wires and the wrapping layer being filled with a filler; an outer sheath arranged outside the wrapping layer.

2. The anti-strand cable according to claim 1, characterized in that The insulating layer comprises a polyvinyl chloride insulating layer and a polyamide nylon insulating layer from inside to outside, and the sawtooth-shaped protrusions are arranged on the polyamide nylon insulating layer.

3. The anti-strand cable of claim 2, wherein, The polyvinyl chloride insulating layer and the polyamide nylon insulating layer are formed by double-layer co-extrusion.

4. The kink-resistant cable of claim 1, wherein, Arc-shaped grooves are formed between the sawtooth-shaped protrusions.

5. The anti-strand cable of claim 4, wherein, The sawtooth-shaped protrusions and the arc-shaped grooves cooperatively form smooth curves.

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