Flame-retardant and environment-friendly power cable

Abstract

The utility model belongs to the technical field of power cables, and particularly relates to a flame-retardant environment-friendly power cable, which comprises an insulating shell, a flame-retardant structure is mounted in the insulating shell, a cable structure is mounted in the flame-retardant structure, a supporting structure is mounted in the middle of the cable structure, and the supporting structure comprises a mounting unit and a reinforcing unit. And the mounting unit comprises a supporting ring, a rectangular mounting hole is formed in the middle of the right side of the supporting ring, and a mounting cylinder is mounted in the rectangular mounting hole. According to the flame-retardant and environment-friendly power cable, through arrangement of the supporting structure and installation of the supporting ring and the reinforcing ribs, supporting force can be provided for the cable when the cable faces stretching force and twisting force, the situation that the cable structure is damaged by the stretching force and the twisting force and use of the cable is affected is prevented, meanwhile, the supporting ring supports extrusion force borne by the cable, and the service life of the cable is prolonged. And meanwhile, short circuit caused by contact between the center conductor and the outer ring conductor when the cable is damaged is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a flame-retardant and environment-friendly power cable. Background Art

[0002] Flame-retardant power cables are cables used to transmit and distribute electrical energy. Flame-retardant power cables can be divided into oil-impregnated paper insulated power cables, plastic insulated power cables, and rubber insulated power cables according to insulation materials. According to voltage levels, they can be divided into medium and low voltage power cables (35 kV and below), high voltage cables (above 110 kV), extra-high voltage cables (275-800 kV), and ultra-high voltage cables (1000 kV and above).

[0003] An existing crack-resistant, highly flame-retardant and environmentally friendly power cable has multiple conductive cores inside. During production or use, the conductive cores inside may be misaligned, squeezed together or deformed, resulting in damage to the shielding layer of the conductive cores.

[0004] For example, a highly flame-retardant and environmentally friendly power cable that is crack-proof is disclosed in Chinese patent CN210156148U. The conductive core is positioned by the card slots on the card plate and the positioning card core to prevent the conductive core from being misplaced and squeezed together, and the conductive core is supported to a certain extent to reduce the extrusion force on the conductive core and prevent damage to the conductive core. When the power cable is produced and used, it is subjected to tension. The connection of the elastic connecting ribs can prevent the outer sheath and the inner sheath from relative movement, thereby reducing the possibility of pulling and deformation of the outer sheath to a certain extent, and preventing the outer sheath from being pulled and locally thinned. The insulating layer, outer sheath, inner sheath, tape and supporting filling layer are all made of halogen-free cross-linked polyethylene, which not only has better flame retardant properties, but also no halogen acid gas is released when the cable burns, the cable emits less smoke, and the corrosive gas generated by the cable combustion is also less, which can reduce the impact on fire rescue and self-rescue in a fire.

[0005] However, in the prior art, when the power cable is in use, the cable is always pulled during the installation process, which inevitably causes the cable to be subjected to excessive tension and torsional force.

[0006] For this reason, we urgently need to provide a flame-retardant and environmentally friendly power cable. Utility Model Content

[0007] The purpose of the utility model is to provide a flame retardant and environmentally friendly power cable to solve the problem raised in the above background technology that in the prior art, the power cable is always pulled during the installation process during use, which inevitably causes the cable to be subjected to excessive tension and torsional force.

[0008] To achieve the above objectives, the utility model provides the following technical solutions: a flame-retardant and environmentally friendly power cable, comprising an insulating shell, a flame-retardant structure installed inside the insulating shell, a cable structure installed inside the flame-retardant structure, and a supporting structure installed in the middle of the cable structure.

[0009] The supporting structure includes a mounting unit and a reinforcing unit.

[0010] The mounting unit comprises a supporting ring, a rectangular mounting hole is opened in the middle of the right side of the supporting ring, and a mounting tube is installed inside the rectangular mounting hole.

[0011] Preferably, the reinforcement unit comprises reinforcement ribs, and a support ring is fixedly connected to the outer surface of the reinforcement ribs.

[0012] Preferably, the outer surface of the reinforcing rib is fixedly connected to the inner wall of the mounting tube, and a circular mounting hole is opened on the right side of the supporting ring. The circumferential array of reinforcing ribs is installed between the central conductor and the outer ring conductor, and the supporting ring is installed inside the insulating layer. Both the supporting ring and the reinforcing ribs are made of insulating materials.

[0013] Preferably, the cable structure comprises an insulating layer, an outer ring conductor is installed near the outer surface of the insulating layer, and a central conductor is installed in the middle of the insulating layer.

[0014] Preferably, the outer ring conductor is installed inside a circular hole opened on the right side of the insulating layer close to the outside, the center conductor is installed inside a circular hole opened in the middle of the right side of the insulating layer, the insulating layer is fixedly connected to the support ring, and the rectangular hole opened on the right side of the insulating layer is fixedly connected to the outer surface of the reinforcing rib.

[0015] Preferably, the flame retardant structure comprises an outer flame retardant layer, a flame retardant filling layer is installed inside the outer flame retardant layer, and an inner flame retardant layer is installed inside the flame retardant filling layer.

[0016] Preferably, the outer surface of the outer flame retardant layer is fixedly connected to the inner wall of the insulating shell, the inner surface of the inner flame retardant layer is fixedly connected to the outer surface of the insulating layer, and the outer flame retardant layer and the inner flame retardant layer are mesh materials made of flame retardant materials, and the inside is filled with a flame retardant filling layer.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The flame-retardant and environment-friendly power cable can provide support force to the cable when it faces tensile force and torsion by setting the support structure and installing the support ring and reinforcing ribs, so as to prevent the tensile force and torsion from damaging the cable structure and affecting the use of the cable. At the same time, the support ring supports the extrusion force on the cable and prevents the center conductor from contacting the outer ring conductor to cause a short circuit when the cable is damaged.

[0019] 2. The flame-retardant and environmentally friendly power cable has a flame-retardant structure. The outer flame-retardant layer and the inner flame-retardant layer are used to prevent the combustion from contacting the internal structure of the cable when the cable is subjected to high temperature, thereby effectively preventing damage to the cable structure. At the same time, when the outer flame-retardant layer is damaged, the flame retardant filling layer filled inside can effectively prevent the continued burning of combustibles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0021] Figure 2 It is a front cross-sectional view of the overall structure of the utility model;

[0022] Figure 3 It is an enlarged view of the right side of the internal structure of the utility model;

[0023] Figure 4 It is an enlarged view of the support structure of the utility model.

[0024] In the figure: 1, insulating shell; 101, outer flame retardant layer; 102, flame retardant filling layer; 103, inner flame retardant layer; 201, insulating layer; 202, outer ring conductor; 203, center conductor; 301, support ring; 302, mounting tube; 303, reinforcing ribs; 304, support ring. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A flame-retardant and environment-friendly power cable comprises an insulating shell 1, a flame-retardant structure is installed inside the insulating shell 1, a cable structure is installed inside the flame-retardant structure, and a supporting structure is installed in the middle of the cable structure.

[0029] The support structure includes a mounting unit and a reinforcement unit. The mounting unit includes a support ring 301, a rectangular mounting hole is opened in the middle of the right side of the support ring 301, and a mounting tube 302 is installed inside the rectangular mounting hole. The reinforcement unit includes a reinforcement rib 303, and a support ring 304 is fixedly connected to the outer surface of the reinforcement rib 303.

[0030] The outer surface of the reinforcing rib 303 is fixedly connected to the inner wall of the mounting tube 302 , and a circular mounting hole is opened on the right side of the supporting ring 301 .

[0031] The cable structure includes an insulating layer 201, an outer ring conductor 202 is installed near the outer surface of the insulating layer 201, and a center conductor 203 is installed in the middle of the insulating layer 201. The outer ring conductor 202 is installed in the inside of a circular hole opened near the outside on the right side of the insulating layer 201, and the center conductor 203 is installed in the inside of a circular hole opened in the middle of the right side of the insulating layer 201. The insulating layer 201 is fixedly connected to the support ring 301, and the inside of the rectangular hole opened on the right side of the insulating layer 201 is fixedly connected to the outer surface of the reinforcing rib 303.

[0032] By setting up the supporting structure and utilizing the installation of the supporting ring 301 and the reinforcing ribs 303, it is possible to provide supporting force to the cable when it faces tensile force and torsion, thereby preventing the tensile force and torsion from damaging the cable structure and affecting the use of the cable. At the same time, the supporting ring 304 supports the extrusion force exerted on the cable, while preventing the center conductor 203 from contacting the outer ring conductor 202 and causing a short circuit when the cable is damaged.

[0033] When the cable is subjected to tensile force, the installation of the reinforcing rib 303 can share the tensile force and provide effective support for the internal structure of the cable. At the same time, when the cable is subjected to torsion, the reinforcing rib 303 installed inside the installation tube 302 and the support ring 301 can provide a rotational reaction support force, thereby preventing damage to the cable caused by excessive torsion. At the same time, the installation of the support ring 304 can provide lateral support for the cable to prevent the internal structure of the cable from being damaged when it is squeezed. At the same time, the support ring 304 is installed between the center conductor 203 and the outer ring conductor 202 to prevent the center conductor 203 and the outer ring conductor 202 from contacting and causing a short circuit when the structure is damaged.

[0034] Embodiment 2:

[0035] Based on the embodiment, the flame retardant structure includes an outer flame retardant layer 101, a flame retardant filling layer 102 is installed inside the outer flame retardant layer 101, and an inner flame retardant layer 103 is installed inside the flame retardant filling layer 102. The outer surface of the outer flame retardant layer 101 is fixedly connected to the inner wall of the insulating shell 1, and the inner flame retardant layer 103 is fixedly connected to the outer surface of the insulating layer 201, and the outer flame retardant layer 101 and the inner flame retardant layer 103 are meshed.

[0036] The flame retardant structure is set up, and the setting of the outer flame retardant layer 101 and the inner flame retardant layer 103 is used to prevent the combustion from contacting the internal structure of the cable when the cable is subjected to high temperature, thereby effectively preventing damage to the cable structure. At the same time, when the outer flame retardant layer 101 is damaged, the flame retardant filling layer 102 filled inside can effectively prevent the continued burning of the combustible material.

[0037] When the cable is burned, the outer flame retardant layer 101 can effectively prevent further burning, thereby causing burning damage to the inside of the cable. When the outer flame retardant layer 101 is damaged during the burning process, the flame retardant filling layer 102 filled inside the outer flame retardant layer 101 and the inner flame retardant layer 103 can retard the burning materials, thereby effectively improving the flame retardant effect. At the same time, the setting of the inner flame retardant layer 103 can further prevent the combustion from causing damage to the inside of the cable structure.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A flame-retardant and environmentally friendly power cable, comprising an insulating casing (1), characterized in that: A flame retardant structure is installed inside the insulating shell (1), a cable structure is installed inside the flame retardant structure, and a support structure is installed in the middle of the cable structure; The support structure includes a mounting unit and a reinforcement unit; The mounting unit comprises a supporting ring (301), a rectangular mounting hole is provided in the middle of the right side of the supporting ring (301), and a mounting cylinder (302) is installed inside the rectangular mounting hole.

2. The flame-retardant and environmentally friendly power cable according to claim 1, characterized in that: The reinforcing unit comprises reinforcing ribs (303), and a supporting ring (304) is fixedly connected to the outer surface of the reinforcing ribs (303).

3. A flame-retardant and environmentally friendly power cable according to claim 2, characterized in that: The outer surface of the reinforcing rib (303) is fixedly connected to the inner wall of the mounting tube (302), and a circular mounting hole is provided on the right side of the supporting ring (301).

4. The flame-retardant and environmentally friendly power cable according to claim 1, characterized in that: The cable structure comprises an insulating layer (201), an outer ring conductor (202) is installed near the outer surface of the insulating layer (201), and a central conductor (203) is installed in the middle of the insulating layer (201).

5. The flame-retardant and environmentally friendly power cable according to claim 4, characterized in that: The outer ring conductor (202) is installed inside a circular hole opened on the right side of the insulating layer (201) close to the outside, and the center conductor (203) is installed inside a circular hole opened in the middle of the right side of the insulating layer (201). The insulating layer (201) is fixedly connected to the support ring (301), and the rectangular hole opened on the right side of the insulating layer (201) is fixedly connected to the outer surface of the reinforcing rib (303).

6. The flame-retardant and environmentally friendly power cable according to claim 1, characterized in that: The flame retardant structure comprises an outer flame retardant layer (101), a flame retardant filling layer (102) is installed inside the outer flame retardant layer (101), and an inner flame retardant layer (103) is installed inside the flame retardant filling layer (102).

7. The flame-retardant and environmentally friendly power cable according to claim 6, characterized in that: The outer surface of the outer flame retardant layer (101) is fixedly connected to the inner wall of the insulating shell (1), the interior of the inner flame retardant layer (103) is fixedly connected to the outer surface of the insulating layer (201), and the outer flame retardant layer (101) and the inner flame retardant layer (103) are mesh-shaped.

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