CN219225943U

CN219225943U - Low-smoke-generation type high-temperature-resistant cable

Info

Publication number: CN219225943U
Application number: CN202222562760.4U
Authority: CN
Inventors: 靳飞; 曾凡令; 刘柏阳; 张军
Original assignee: Chengdu Deyuan Wires And Cables Co ltd
Current assignee: Chengdu Deyuan Wires And Cables Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-20
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a low-smoke-generation type high-temperature-resistant cable, which comprises three conductor groups; wrapping the layer; a filling layer; a halogen-free ceramization layer; foaming ceramic silicon belt layer; and the outer cladding is a halogen-free polyolefin layer. According to the utility model, the wrapping layer, the halogen-free ceramic layer, the foaming ceramic silicon tape layer and the outer wrapping layer are sequentially sleeved outside the three conductor groups, and the material characteristics of the halogen-free ceramic layer and the foaming ceramic silicon tape layer are utilized to perform double-layer heat insulation flame-retardant protection on the three conductor groups in the wrapping layer, so that the high-temperature resistance strength of the cable is effectively enhanced. The purpose of realizing high temperature resistance of the cable is effectively realized. The material of the outer cladding is set to be a halogen-free polyolefin layer, so that the heat insulation and flame retardance protection is further enhanced. Meanwhile, all the materials selected are low in smoke yield when combusted, can be recycled, reduce the pollution degree to the environment, are more environment-friendly, and provide favorable conditions for people to escape in the fire environment.

Description

Low-smoke-generation type high-temperature-resistant cable

Technical Field

The utility model relates to the technical field of cable wires, in particular to a low-smoke-generation type high-temperature-resistant cable.

Background

A cable is an electrical energy or signal transmission device, typically consisting of several wires or groups of wires. The cables are divided into signal cables for transmitting signals, such as cable television cables and telephone cables, and power cables for transmitting electric power. The main functions of the wire and cable are to transmit electric energy, signals and realize electromagnetic conversion, such as a power cable, an overhead line and the like, to transmit electric power, and to transmit signals and the like, and to realize electromagnetic conversion, such as an enameled wire. In recent years, safety accidents of cable fire occur continuously, and a great deal of personnel and property loss and personnel injury are caused. Cause of cable fire

Comprising the following steps: the continuous operation of the cable is easy to cause insulation aging and short circuit and fire; the overload operation for a long time can not cut off load short-circuit current in time, so that insulation is overheated, and short-circuit fire is caused. And once the cable fires, a series of chain reactions are caused, for example, a cable circuit around the cable fires is also caused to fire together, so that the fire is larger and larger, a large amount of smoke is generated by burning, the high-temperature dense smoke also seriously affects personnel escape, the health and safety of people are threatened, and meanwhile, toxic smoke generated by burning also pollutes the environment, so that a cable resistant to high temperature and low in smoke generation is urgently needed to be designed.

Disclosure of Invention

The utility model aims to provide a low-smoke-generation type high-temperature-resistant cable for realizing high-temperature resistance and low smoke generation of the cable.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a low smoke-producing, high temperature resistant cable comprising:

the three conductor sets are connected and wound through intertwisting, the port sections of the three conductor sets are distributed in a delta shape, and the conductor sets are used for transmission work of the cable;

the wrapping layers are arranged outside the three conductor groups in a wrapping mode, and the three conductor groups are tangent to the inner ring of the wrapping layers respectively;

the filling layer is filled in gaps between the three conductor groups and the wrapping layer;

the halogen-free ceramic layer is sleeved on the outer ring of the wrapping layer and is used for heat insulation and flame retardance;

the foaming ceramic silicon tape layer is wound and sleeved on the halogen-free ceramic layer to realize double flame retardance and heat insulation on the structure in the halogen-free ceramic layer;

the outer wrapping layer is sleeved on the outer ring of the foaming ceramic silicon belt layer;

wherein the outer cladding is a halogen-free polyolefin layer.

In some alternative embodiments, the conductor set includes:

the conductor is formed by stranding oxygen-free copper;

the insulating layer is wrapped on the conductor and is used for insulating the conductor;

the conductors on the three conductor groups are distributed in an annular array by taking the central axis of the wrapping layer as the center of a circle.

In some alternative embodiments, the insulating layer is a polypropylene insulating layer.

In some alternative embodiments, the wrapping layer and the filling layer are both made of glass fiber materials.

In some alternative embodiments, the wrapping layer is formed by wrapping a glass fiber tape, and the filling layer is filled with glass fiber material.

In some alternative embodiments, the wrap, the halogen-free ceramization layer, the foamed ceramic silicone tape layer, and the outer wrap are coaxially sleeved outside of the three conductor sets.

The beneficial effects of the utility model are as follows:

according to the embodiment of the utility model, the wrapping layer, the halogen-free ceramic layer, the foaming ceramic silicon tape layer and the outer wrapping layer are sequentially sleeved outside the three conductor groups, and the material characteristics of the halogen-free ceramic layer and the foaming ceramic silicon tape layer are utilized to perform double-layer heat insulation flame-retardant protection on the three conductor groups in the wrapping layer, so that the high-temperature resistance strength of the cable is effectively enhanced. The purpose of realizing high temperature resistance of the cable is effectively realized. Meanwhile, the material of the outer cladding is set to be a halogen-free polyolefin layer, so that the smoke yield of the burning outer cladding is reduced, the pollution degree to the environment is reduced, and the cable is more environment-friendly.

Drawings

Fig. 1 is a schematic structural diagram of a low-smoke-generation type high-temperature-resistant cable according to an embodiment of the present utility model.

The labels in the figures are as follows:

1. a conductor; 2. an insulating layer; 3. a filling layer; 4. wrapping the layer; 5. a halogen-free ceramization layer; 6. foaming ceramic silicon belt layer; 7. and an outer cladding.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Examples

Referring to fig. 1, a low-smoke-generation type high-temperature-resistant cable, the high-temperature-resistant cable comprising: three conductor 1 groups, a wrapping layer 4, a filling layer 3, a halogen-free ceramic layer 5, a foaming ceramic silicon belt layer 6 and an outer wrapping layer 7. The three conductor 1 groups are tightly twisted, connected and wound, the port sections of the three conductor 1 groups are distributed in a delta shape, and the conductor 1 groups are used for transmission work of the cable. The wrapping layer 4 is arranged outside the three conductor 1 groups in a wrapping mode, the three conductor 1 groups are tangent to the inner ring of the wrapping layer 4 respectively, and the wrapping layer 4 is used for heat insulation and flame retardance. The filling layer 3 is filled in gaps between the three conductor 1 groups and the wrapping layer 4, and the filling layer 3 is used for filling the gap space between the inside of the wrapping layer 4 and the three conductor 1 groups, so that the heat insulation effect on the conductor 1 groups is enhanced. The halogen-free ceramic layer 5 is sleeved on the outer ring of the wrapping layer 4, and the halogen-free ceramic layer 5 is used for heat insulation and flame retardance and ensures the stability of the internal structure. The foamed ceramic silicon tape layer 6 is wound and sleeved on the halogen-free ceramic layer 5, and the foamed ceramic silicon tape layer 6 is used for heat insulation and flame retardance of the halogen-free ceramic layer 5, and then double flame retardance and heat insulation are carried out on the structure in the halogen-free ceramic layer 5, so that the heat insulation stability of the internal structure is further guaranteed. The outer wrapping layer 7 is sleeved on the outer ring of the foaming ceramic silicon belt layer 6, and the outer wrapping layer 7 is used for external protection. In this embodiment, the wrapping layer 4, the halogen-free ceramic layer 5, the foamed ceramic silicon ribbon layer 6, and the outer wrapping layer 7 are coaxially sleeved outside the three conductor 1 groups, so as to insulate heat and flame for the three conductor 1 groups, thereby ensuring the stability of the whole cable structure. In this embodiment, the outer part of the three conductor 1 groups is sequentially sleeved with a wrapping layer 4, a halogen-free ceramic layer 5, a foamed ceramic silicon tape layer 6 and an outer wrapping layer 7, and the material characteristics of the halogen-free ceramic layer 5 and the foamed ceramic silicon tape layer 6 are utilized to perform double-layer heat insulation and flame retardation protection on the three conductor 1 groups in the wrapping layer 4, so that the high temperature resistance of the cable is effectively enhanced. The purpose of realizing high temperature resistance of the cable is effectively realized.

In this embodiment, in order to ensure insulation between three of the conductor 1 groups and normal operation of the cable, the conductor 1 group includes: the oxygen-free copper-stranded conductor 1 and the insulating layer 2, wherein the insulating layer 2 is tightly wrapped on the conductor 1, the insulating layer 2 is used for insulating the conductor 1, and the insulating strength between each conductor 1 group is effectively enhanced. Preferably, the insulating layer 2 is a polypropylene insulating layer 2, and the insulating layer 2 has a temperature resistance grade of 110 ℃ for a long time by adopting the polypropylene insulating layer 2, which is 20 ℃ to 40 ℃ higher than that of the conventional products on the market. The temperature resistance level is high, the transmission current can be improved, the temperature resistance level can be improved by about 8% under the same condition, and the material use is reduced. After the service life of the cable is finished, the PP material can be fully recycled, and the waste is avoided. The conductors 1 on the three conductor 1 groups are distributed in an annular array with the central axis of the wrapping layer 4 as a circle center, so that reasonable compliance of the cable design is ensured, and cable transmission work can be normally performed.

In this embodiment, in order to ensure the thermal insulation effect of the cable, the wrapping layer 4 is formed by wrapping a glass fiber ribbon, the filling layer 3 is filled with a glass fiber material, and both the wrapping layer 4 and the filling layer 3 are made of glass fiber materials, so that the wrapping layer 4 and the filling layer 3 are ensured to be thermal-insulated and flame-retardant.

In the embodiment, the halogen-free ceramic layer 5 and the foaming ceramic silicon belt form a ceramic shell on the structural surface after being burnt by flame, so that the internal structure of the ceramic shell is insulated and flame-retardant, and the stability of the internal structure of the ceramic shell is ensured. Specifically, the foamed ceramic silicon tape is sintered to form a ceramic shell after being burned in a fire, is hard and heat-insulating, protects the halogen-free ceramic layer 5, and ensures that the halogen-free ceramic layer 5 is stable in crusting; the halogen-free ceramic layer 5 is burnt by fire and then forms a ceramic shell, so that the ceramic shell is hard and heat-insulating, and the stability of the internal structure and the heat-insulating flame-retardant effect are further ensured.

In this embodiment, in order to guarantee the low smoke effect of the cable, the outer cladding 7 of the cable is a halogen-free polyolefin layer, so that when the cable burns, the outer cladding 7 of the cable reduces the generation of polluted smoke from the source of the material, and simultaneously, the outer cladding 7 reduces toxic components in the smoke by adopting the halogen-free polyolefin layer, so that the cable is more environment-friendly. In addition, in this embodiment, in order to ensure the flame-retardant and smoke-suppressing effect of the outer cladding 7, a flame retardant is added and mixed in the outer cladding 7, and the flame retardant may be a metal oxide flame retardant, so that the smoke-suppressing effect is good, the structure is stable, and no pollution is caused to the environment.

In the embodiment, the overall structure low smoke performance of the cable structure in the application meets the requirement of flame retardant B1 grade in GB 31247-2014 Standard of the fire Performance of Cable and optical Cable.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. A low smoke-producing, high temperature resistant cable comprising:

wherein the outer cladding is a halogen-free polyolefin layer.

2. The low smoke-producing, high temperature resistant cable of claim 1 wherein said conductor set comprises:

the conductor is formed by stranding oxygen-free copper;

3. The low smoke-producing, high temperature resistant cable of claim 2 wherein said insulation layer is a polypropylene insulation layer.

4. A low smoke-producing, high temperature resistant cable as defined in claim 3, wherein said wrapping layer and said filler layer are both fiberglass materials.

5. The low smoke-producing, high temperature resistant cable of claim 4 wherein said wrapping is formed by wrapping with a glass fiber tape and said filler layer is filled with a glass fiber material.

6. The low smoke-producing, high temperature resistant cable of any of claims 1 to 5 wherein said wrap, said halogen-free ceramming layer, said foamed ceramic tape layer, said outer wrap are coaxially disposed about the exterior of the three conductor sets.