Novel flame-retardant wire

Abstract

The utility model discloses a novel flame-retardant electric wire, which relates to the technical field of flame-retardant electric wires and comprises a low-smoke halogen-free sheath and a cable core, a reinforcing outer sleeve, an outer insulating layer, a heat insulating layer and an outer support sleeve are sequentially attached and connected to the periphery of the inner wall of the low-smoke halogen-free sheath, and a reinforcing steel bar is mounted in the center of the interior of the outer support sleeve. The cable core is installed on the outer periphery of the reinforcing steel bar in a surrounding mode, an inner insulating layer, a conductive layer, a polyvinyl chloride protective layer, an inner reinforcing sleeve and an inner protective sleeve are sequentially connected to the outer periphery of the outer surface of the cable core in an attached mode, a grounding copper wire is fixedly installed on the conductive layer, and the polyvinyl chloride protective layer wraps and is connected to the exterior of the grounding copper wire. A brominated flame-retardant layer is filled in a cavity formed by the inner protective sleeve and the reinforcing steel bars between the outer support sleeve, a plurality of first buffer columns are connected to the periphery of the inner wall of the outer support sleeve at equal intervals, second buffer columns are connected to the periphery of the outer surface of the inner support sleeve at equal intervals in a surrounding mode, and the effect of improving flame retardance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flame-retardant electric wires, in particular to a novel flame-retardant electric wire. Background Art

[0002] Cables and wires play a huge role in the national economic construction as a carrier of transmission cables and information dissemination. With the acceleration of urbanization, the rapid development of power transmission and communications, people have higher and higher requirements for AC power cables. The use environment of AC power cables is complex and they are easy to burn when encountering high temperatures. For some high-temperature extreme environments, an AC power cable with excellent flame retardant properties is needed to improve the safety of the operating environment.

[0003] The existing (Announcement No.: CN220020674U) discloses a flame-retardant wire, which can enhance the tear resistance of the utility model through the setting of the inner braided net, fine sand and outer braided net, so as to ensure the service life of the utility model, and with the help of the setting of fine sand, it can block the external fire source to prevent the fire from expanding and spreading and causing damage to the wire assembly. At the same time, with the setting of the heat insulation layer, it can prevent high temperature heat from penetrating into the inside of the wire assembly to affect or damage the operation of the wire assembly, thereby ensuring the use effect of the wire assembly, thereby improving the service life and use effect of the wire assembly. Although the flame retardant effect of the wire is achieved, it is impossible to achieve bidirectional flame retardancy of the wire inside and outside by only relying on the setting of fine sand and heat insulation layer, so that the flame retardant effect is not good. Utility Model Content

[0004] The purpose of the utility model is to provide a novel flame-retardant electric wire, which solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel flame-retardant electric wire, comprising a low-smoke halogen-free sheath and a cable core, the inner wall of the low-smoke halogen-free sheath is sequentially bonded with a reinforcing outer sleeve, an outer insulating layer, a heat insulating layer and an outer support sleeve, a reinforcing steel bar is installed at the center position inside the outer support sleeve, the cable core is circumferentially installed around the outside of the reinforcing steel bar, the outer surface of the cable core is sequentially bonded with an inner insulating layer, a conductive layer, a polyvinyl chloride protective layer, an inner reinforcing sleeve and an inner protective sleeve, a grounding copper wire is fixedly installed on the conductive layer, and the polyvinyl chloride protective layer is wrapped and connected to the outside of the grounding copper wire, and the cavity formed by the inner protective sleeve and the reinforcing steel bar between the outer support sleeve is filled with a bromine-based flame retardant layer.

[0006] Optionally, the reinforcing steel bars are specifically made of insulating steel bars.

[0007] Optionally, a plurality of first buffer columns are equidistantly connected to the inner wall of the outer support sleeve.

[0008] Optionally, an inner support sleeve is fixedly sleeved on the outer surface of the reinforcing steel bar, and an outer surface of the inner support sleeve is surrounded by equidistant second buffer columns.

[0009] Optionally, the first buffer column and the second buffer column are both in contact with the inner protective cover, and the first buffer column and the second buffer column are both made of heat-insulating silicone material.

[0010] Optionally, the outer support sleeve and the inner support sleeve are both made of environmentally friendly flame-retardant materials.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The utility model cooperates the low-smoke halogen-free sheath, the heat-insulating layer, the conductive layer, the grounding copper wire, the polyvinyl chloride protective layer, the bromine-based flame-retardant layer and the inner insulating layer of the electric wire. Firstly, the low-smoke halogen-free sheath is a polyolefin thermoplastic composite material containing a flame retardant, does not release halogen acid, has the characteristic of self-extinguishing, can greatly reduce the emission of toxic and corrosive gases and the generation of smoke, and the cable made of this material is particularly suitable for use in public places requiring high safety, and cooperates with the flame-retardant protective properties of the internal bromine-based flame-retardant layer and the polyvinyl chloride protective layer to enhance the flame-retardant purpose inside and outside the electric wire, secondly, the heat-insulating layer can prevent high-temperature heat from penetrating into the cable core, and ensure the safe use of the electric wire, and finally, when the voltage of the electric quantity passed into the cable core is too high, it will break through the inner insulating layer and enter the conductive layer, and the conductive layer will guide and discharge the leaked electric quantity into the ground through the pre-buried grounding copper wire, and prevent the electric wire from catching fire due to the leakage of electric quantity, thereby achieving the excellent flame-retardant effect inside and outside the electric wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the structure of the utility model;

[0014] Figure 2 It is a front cross-sectional view of the structure of the utility model;

[0015] Figure 3 For this utility model Figure 2 A magnified schematic diagram of center A.

[0016] In the figure: 1-low smoke zero halogen sheath, 2-reinforced outer sleeve, 3-outer insulation layer, 4-thermal insulation layer, 5-outer support sleeve, 6-first buffer column, 7-reinforced steel bars, 8-inner support sleeve, 9-second buffer column, 10-cable core, 11-conductive layer, 12-grounding copper wire, 13-polyvinyl chloride protective layer, 14-inner reinforcement sleeve, 15-inner protective sleeve, 16-brominated flame retardant layer, 17-inner insulation layer. 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] For example, see Figures 1 to 3 The utility model provides a technical solution: a novel flame retardant wire, comprising a low-smoke halogen-free sheath 1 and a cable core 10, the inner wall of the low-smoke halogen-free sheath 1 is sequentially bonded with a reinforcing jacket 2, an outer insulating layer 3, a heat insulating layer 4 and an outer support sleeve 5, a reinforcing steel bar 7 is installed at the center position inside the outer support sleeve 5, and the reinforcing steel bar 7 is specifically made of insulating steel bar material. The cable core 10 is circumferentially installed around the outside of the reinforcing steel bar 7, and the outer surface of the cable core 10 is sequentially bonded with an inner insulating layer 17, a conductive layer 11, a polyvinyl chloride protective layer 13, an inner reinforcing sleeve 14 and an inner protective sleeve 15, a grounding copper wire 12 is fixedly installed on the conductive layer 11, and the polyvinyl chloride protective layer 13 is wrapped and connected to the outside of the grounding copper wire 12, and the cavity formed by the inner protective sleeve 15 and the reinforcing steel bar 7 between the outer support sleeve 5 is filled with a bromine flame retardant layer 16.

[0019] More specifically, in this embodiment, firstly, the low-smoke halogen-free sheath 1 is a polyolefin thermoplastic composite material containing a flame retardant, does not release halogen acid, has a self-extinguishing characteristic, and can greatly reduce the emission of toxic and corrosive gases and the generation of smoke. The cable made of this material is particularly suitable for use in public places requiring high safety. Combined with the flame retardant protection of the internal bromine flame retardant layer 16 and the polyvinyl chloride protective layer 13, the flame retardant purpose inside and outside the wire can be enhanced. Secondly, the thermal insulation layer 4 can prevent high-temperature heat from penetrating into the cable core 10, thereby ensuring the safe use of the wire. Finally, when the voltage of the electricity passed into the cable core 10 is too high, it will break through the inner insulating layer 17 and enter the conductive layer 11. The conductive layer 11 guides and discharges the leaked electricity into the ground through the pre-buried grounding copper wire 12, thereby preventing the wire from catching fire due to electricity leakage, thereby achieving excellent flame retardant effects inside and outside the wire.

[0020] The reinforcing steel bars 7 can provide reliable support at the inner center of the wire, and cooperate with the reinforcing jacket 2 to provide the low-smoke zero-halogen sheath 1 with compressive and tensile strength.

[0021] Embodiment 2, based on the above embodiment:

[0022] Furthermore, a plurality of first buffer columns 6 are equidistantly connected to the inner wall of the outer support sleeve 5, an inner support sleeve 8 is fixedly sleeved on the outer surface of the reinforcing steel bar 7, and second buffer columns 9 are equidistantly connected to the outer surface of the inner support sleeve 8 in a surrounding manner, and both the first buffer columns 6 and the second buffer columns 9 are in contact with the inner protective sleeve 15.

[0023] The first buffer column 6 and the second buffer column 9 are both made of heat-insulating silicone material, and the outer support sleeve 5 and the inner support sleeve 8 are both made of environmentally friendly flame-retardant material.

[0024] More specifically, in this embodiment, the first buffer column 6 and the second buffer column 9 abutting against the inner protective cover 15 can provide buffering protection for the cable core 10 protected by the inner protective cover 15, which can not only avoid the breakage of the wire due to temperature changes, but also improve the deformation resistance of the wire.

[0025] However, after the electric wire is burned, the outer support sleeve 5 and the inner support sleeve 8 made of environmentally friendly flame-retardant material will not produce toxic and harmful pollutants, which is safe and environmentally friendly.

[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 novel flame-retardant electric wire, comprising a low-smoke halogen-free sheath (1) and a cable core (10), characterized in that: The inner wall of the low-smoke zero-halogen sheath (1) is sequentially bonded with a reinforcing outer sleeve (2), an outer insulating layer (3), a heat insulating layer (4) and an outer support sleeve (5); a reinforcing steel bar (7) is installed at the center position inside the outer support sleeve (5); the cable core (10) is installed around the outside of the reinforcing steel bar (7); the outer surface of the cable core (10) is sequentially bonded with an inner insulating layer (17), a conductive layer (11), a polyvinyl chloride protective layer (13), an inner reinforcing sleeve (14) and an inner protective sleeve (15); a grounding copper wire (12) is fixedly installed on the conductive layer (11), and the polyvinyl chloride protective layer (13) is wrapped around the outside of the grounding copper wire (12); and a cavity formed between the inner protective sleeve (15) and the reinforcing steel bar (7) and the outer support sleeve (5) is filled with a bromine-based flame retardant layer (16).

2. A novel flame-retardant electric wire according to claim 1, characterized in that: The reinforcing steel bars (7) are specifically made of insulating steel bars.

3. A novel flame-retardant electric wire according to claim 1, characterized in that: A plurality of first buffer columns (6) are connected to the inner wall of the outer support sleeve (5) at equal intervals around the periphery.

4. A novel flame-retardant electric wire according to claim 3, characterized in that: An inner support sleeve (8) is fixedly sleeved on the outer surface of the reinforcing steel bar (7), and an equidistant second buffer column (9) is connected to the outer surface of the inner support sleeve (8) in a surrounding manner.

5. A novel flame-retardant electric wire according to claim 4, characterized in that: The first buffer column (6) and the second buffer column (9) are both in contact with the inner protective sleeve (15), and the first buffer column (6) and the second buffer column (9) are both made of heat-insulating silica gel material.

6. A novel flame-retardant electric wire according to claim 5, characterized in that: The outer support sleeve (5) and the inner support sleeve (8) are both made of environmentally friendly flame-retardant materials.

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