Stretch-resistant cable

Abstract

The utility model discloses a tensile cable, which comprises an outer sleeve layer, a protective layer, an insulating layer and a hard insulating sleeve, the hard insulating sleeve is arranged in the center of a cable body, and a plurality of groups of symmetrical auxiliary threading holes are arranged in the hard insulating sleeve. According to the utility model, the auxiliary threading holes and the main threading hole are arranged in the hard insulation sleeve, the main threading hole is arranged among the plurality of groups of auxiliary threading holes, and the side walls of the auxiliary threading holes are provided with the plurality of groups of heat dissipation holes, so that the heat dissipation of a lead copper wire in the auxiliary threading holes is facilitated, the service life of the cable body is prolonged, and the service life of the cable body is prolonged. And meanwhile, the hard insulating sleeve is arranged in the outer sleeve layer, and is used for supporting the outer sleeve layer, so that the situation that the service life of the cable is influenced by the fracture of the outer sleeve layer and the excessive stretching of the cable in the installation process of installation personnel is avoided.

Description

Technical Field

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

[0002] Electric cable (Cable) is a wire made of one or more mutually insulated conductors and an outer insulating protective layer, which is laid underground, in the air, etc. Cables are generally composed of three parts: conductor, insulating layer, and protective layer. There are usually two types of power cables and control cables. Power cables are mainly used for the transmission and distribution of electric energy; control cables are mainly used for measurement, protection, control and other lines. Cables have the characteristics of internal power supply and external insulation.

[0003] Cables are everywhere in cars, offices or other places. Cables need to be installed underground or inside beams. When installers install them, they will inevitably stretch and bend the cables. Ordinary cables will break when the bending angle is too large or the installers stretch them with great force, exposing the internal conductive copper wires, which will endanger the personal safety of installers and users. Therefore, a stretch-resistant cable is needed. Utility Model Content

[0004] The utility model aims to provide a stretch-resistant cable, by arranging a hard insulating sleeve inside the outer jacket layer, and the inside of the hard insulating sleeve is respectively provided with secondary threading holes and main threading holes, so that the copper wire at the point can pass through the secondary threading holes and the main threading holes, and the hard insulating sleeve is installed inside the outer jacket layer to support the cable body, so as to avoid excessive stretching of the cable during installation and damage, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A stretch-resistant cable comprises an outer jacket layer, a protective layer, an insulating layer, and a hard insulating sleeve. The hard insulating sleeve is arranged at the center of the cable body. A plurality of symmetrical secondary threading holes are provided inside the hard insulating sleeve. A plurality of heat dissipation holes are provided outside the plurality of secondary threading holes and on the side wall of the hard insulating sleeve. A main threading hole is provided at the center of the hard insulating sleeve. Conductive copper wires can be placed inside the secondary threading holes and the main threading holes.

[0007] Preferably, the material of the hard insulating sleeve is set to be resin hard insulating material.

[0008] Preferably, the inner walls of the secondary threading hole and the main threading hole are coated with insulating material.

[0009] Preferably, the outer wall of the hard insulating sleeve is covered with a heat insulation film.

[0010] Preferably, a rubber filling layer is provided inside the hard insulating sleeve.

[0011] Preferably, the interior of the insulating layer is filled with insulating colored ceramic hollow microspheres.

[0012] Preferably, the material of the protective layer is set to be glass fiber mesh.

[0013] Preferably, the outer jacket layer is made of polyvinyl chloride, and the outer side wall of the outer jacket layer is coated with fire retardant paint.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a secondary threading hole and a main threading hole inside a hard insulating sleeve, wherein the main threading hole is located between multiple groups of secondary threading holes, and multiple groups of heat dissipation holes are provided on the side walls of the secondary threading holes, so as to dissipate heat for the copper wires inside the secondary threading holes, thereby increasing the service life of the cable body and avoiding fires caused by excessively high temperatures during the use of the cable;

[0016] 2. At the same time, the utility model arranges a hard insulating sleeve to be installed inside the outer jacket layer, and uses the hard insulating sleeve to support the outer jacket layer to prevent the installer from over-stretching the cable during the installation process, causing the outer jacket layer to rupture and affecting the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the external structure of the cable body of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the cable of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the rigid insulating sleeve of the utility model.

[0020] In the figure: 1. outer jacket layer; 2. protective layer; 3. insulating layer; 4. hard insulating sleeve; 5. secondary threading hole; 6. heat dissipation hole; 7. main threading hole. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 3 , the utility model provides a technical solution:

[0023] A tensile-resistant cable comprises an outer jacket layer 1, a protective layer 2, an insulating layer 3, and a hard insulating sleeve 4. The hard insulating sleeve 4 is arranged at the center of the cable body. A plurality of symmetrical secondary threading holes 5 are provided inside the hard insulating sleeve 4. A plurality of heat dissipation holes 6 are provided outside the plurality of secondary threading holes 5 and on the side wall of the hard insulating sleeve 4. A main threading hole 7 is provided at the center of the hard insulating sleeve 4. Conductive copper wires can be placed inside both the secondary threading holes 5 and the main threading holes 7.

[0024] By opening a plurality of groups of secondary threading holes 5 inside the hard insulating sleeve 4, and opening a plurality of groups of heat dissipation holes 6 outside the secondary threading holes 5 on the side walls of the hard insulating sleeve 4, the heat generated by the conductive copper wires passing through the secondary threading holes 5 during operation can be dissipated through the heat dissipation holes 6, thereby increasing the service life of the cable body.

[0025] The material of the hard insulating sleeve 4 is set to be a resin hard insulating material. By setting the bottom material to be a resin hard insulating material, the hard insulating sleeve 4 is arranged inside the outer jacket layer 1 to support the cable body and increase the tensile strength of the cable body.

[0026] The inner walls of the secondary threading hole 5 and the main threading hole 7 are coated with insulating materials. By brushing the insulating materials inside the secondary threading hole 5 and the main threading hole 7, the safety of the conductive copper wire inside the secondary threading hole 5 and the main threading hole 7 is increased.

[0027] The outer wall of the hard insulating sleeve 4 is covered with a heat insulation film. By covering the outer wall of the hard insulating sleeve 4 with the heat insulation film, the heat insulation film can be used to insulate the copper wire inside the hard insulating sleeve 4, thereby increasing the service life of the cable body.

[0028] A rubber filling layer is provided inside the hard insulating sleeve 4. By providing the rubber filling layer inside the hard insulating sleeve 4, the rubber filling layer can be used to support and isolate the conductive copper wires inside the secondary threading holes 5 and the main threading holes 7 opened inside the hard insulating sleeve 4, so as to protect the copper wires.

[0029] The interior of the insulating layer 3 is filled with insulating colored ceramic hollow microspheres. By setting the filling material inside the insulating layer 3 to be insulating colored ceramic hollow microspheres, the insulating layer 3 can be used to play an insulating role to protect maintenance personnel and avoid damage to people caused by cable leakage.

[0030] The material of the protective layer 2 is set to be a glass fiber mesh. By setting the material of the protective layer 2 to be a glass fiber mesh, the internal copper wire and the insulating layer 3 can be protected by the protective layer 2, thereby increasing the hardness of the cable.

[0031] The material of the jacket layer 1 is set to polyvinyl chloride, and the outer wall of the jacket layer 1 is coated with fire-retardant paint. By setting the material of the jacket layer 1 to PVC material and coating the outer wall of the jacket layer 1 with fire-retardant paint, external fire sources can be prevented from causing damage to the cable body and affecting the normal use of the cable body.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tensile-resistant cable, characterized in that: The invention comprises an outer jacket layer (1), a protective layer (2), an insulating layer (3), and a hard insulating sleeve (4); the hard insulating sleeve (4) is arranged at the center of the cable body; a plurality of symmetrical secondary threading holes (5) are provided inside the hard insulating sleeve (4); a plurality of heat dissipation holes (6) are provided outside the plurality of secondary threading holes (5) and on the side wall of the hard insulating sleeve (4); a main threading hole (7) is provided at the center of the hard insulating sleeve (4); and conductive copper wires can be placed inside the secondary threading holes (5) and the main threading holes (7).

2. A stretch-resistant cable according to claim 1, characterized in that: The material of the hard insulating sleeve (4) is set to be a resin hard insulating material.

3. A stretch-resistant cable according to claim 2, characterized in that: The inner walls of the secondary threading hole (5) and the main threading hole (7) are both coated with insulating material.

4. A stretch-resistant cable according to claim 3, characterized in that: The outer side wall of the hard insulating sleeve (4) is covered with a heat insulation film.

5. The stretch-resistant cable according to claim 4, characterized in that: A rubber filling layer is provided inside the hard insulating sleeve (4).

6. The stretch-resistant cable according to claim 1, characterized in that: The interior of the insulating layer (3) is filled with insulating colored ceramic hollow microspheres.

7. The stretch-resistant cable according to claim 6, characterized in that: The material of the protective layer (2) is set to be glass fiber mesh.

8. The stretch-resistant cable according to claim 7, characterized in that: The material of the outer jacket layer (1) is set to be polyvinyl chloride, and the outer side wall of the outer jacket layer (1) is painted with fire-retardant paint.

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