CN209895812U

CN209895812U - Multiple fireproof cable

Info

Publication number: CN209895812U
Application number: CN201921110096.1U
Authority: CN
Inventors: 李耿
Original assignee: Guangzhou Dongfeng Cable Co Ltd
Current assignee: Guangzhou Dongfeng Cable Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-01-03
Anticipated expiration: 2029-07-15

Abstract

The utility model provides a multiple fireproof cable, it includes predetermined quantity's cable core, each the cable core all includes with the conductor and sets gradually a high temperature resistant buffer layer 12 box an insulating layer outside the conductor, each the cable core separates the setting alone each other through a support, be provided with the filling layer in the support, the filling layer intussuseption is filled with the fire-retardant polyolefin fire-retardant material of thermoplasticity low smoke and zero halogen, each the cable core with the clearance department of support is filled there is high temperature resistant mineral substance rope, a flame retardant coating, a stainless steel wire weaving layer, a fire prevention paint spraying layer and an oversheath have set gradually outward to the support. The utility model discloses be equipped with the fire-retardant refractory structure of multilayer, realized multiple protection, guaranteed the utility model discloses a fire prevention function makes it also can realize that signal transmission is stable in the longer time under high temperature, the conflagration condition, just the utility model discloses shielding nature, pull resistance and wearability are good, have improved the utility model discloses a stability, security and life.

Description

Multiple fireproof cable

Technical Field

The utility model relates to a wire and cable technical field especially relates to a multiple fireproof cable.

Background

With the rapid development of economy and the rapid popularization of electric power in China, the cable is widely applied to various rows and places as a carrier of electric power transportation, the electric power safety is very important, and particularly in places such as rail transit, oil wells and nuclear power stations, the cable has higher requirements on the safety of the cable in case of fire. When a fire disaster occurs, the cable often cannot transmit signals due to poor fire resistance and flame retardance and poor shielding anti-interference performance, alarm is blocked, rescue is not timely, or the cable is damaged and cannot be powered, so that personnel escape is blocked, and finally huge personnel and property loss is caused. Therefore, it is important to provide a cable with high fire resistance, high interference resistance, and capability of keeping smooth and stable signal transmission for a certain time in case of fire, so as to reduce casualties and property loss.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire resistance is high, interference immunity is strong, high temperature resistant, the stable multiple fireproof cable of signal transmission.

For reaching this purpose, the utility model provides a multiple fireproof cable, cable core including predetermined quantity, each the cable core all includes a conductor and sets gradually a high temperature buffer layer and an insulating layer outside the conductor, each the cable core separates the setting each other through a support, the support is aluminium system support, be provided with a filling layer in the support, the filling layer intussuseption is filled with thermoplasticity low smoke and zero halogen polyolefin fire-retardant material, each the cable core with the clearance of support is filled with high temperature resistant mineral substance rope, the cable core has set gradually a flame retardant coating, a stainless steel silk weaving layer, a fire prevention paint spraying layer and an oversheath outward.

Preferably, the high-temperature-resistant buffer layer is a high-temperature modified silicone rubber layer or a high-temperature acrylate resin layer, the high-temperature-resistant mineral rope is a rock wool rope, the fire-resistant layer is a fire-resistant mica tape wrapping layer or a high-fire-retardant glass fiber fire-resistant layer, and the outer sheath is a fire-retardant nylon outer sheath.

Further preferably, the support comprises a frame and a predetermined number of connecting frames arranged in the frame, one end of each connecting frame is connected with the frame, the other ends of the connecting frames intersect at the center of the cross section of the frame, and each cable core is arranged in a gap between the frame and each connecting frame.

Further preferably, the insulating layer is a crosslinked polyethylene insulating layer.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a multiple fireproof cable, it includes the cable core of predetermined quantity, the cable core all includes a conductor and sets up high temperature buffer layer and insulating layer 13 outside the conductor, the high temperature buffer layer can reduce and delay the impact of temperature to the conductor under the high temperature condition, each cable core is separated the setting by aluminium system support respectively, aluminium system support with the insulating layer 13 cooperation can play good shielding effect, effectively avoid each cable core mutual interference or receive external disturbance each other, improved cable signal transmission's stability; meanwhile, the aluminum bracket can absorb a large amount of heat energy during high-temperature oxidation and generate aluminum oxide to form a heat barrier, the heat insulation effect is obvious, the impact of a fire source can be relieved, and the indirect flame retardant effect is achieved;

the thermoplastic low-smoke halogen-free polyolefin oxygen-insulating material has excellent flame retardant property and self-extinguishing property when being away from fire, and a hard carbon shell layer is formed by clinging a burnt object to a cable, so that oxygen and heat are isolated, and continuous burning is effectively prevented;

the high-temperature-resistant mineral rope filled in the gap between each cable core and the support is a rock wool rope, has excellent heat insulation and high-temperature resistance, belongs to inorganic silicate fiber and cannot be combusted. The high-temperature-resistant mineral rope is tightly filled in the gap between each cable core and the support, so that no gap is left between the cable cores to the maximum extent, the contact surface between air and the cable cores is reduced, and the effects of oxygen isolation and flame retardance are achieved;

the flame retardant coating, stainless steel wire weaving layer, the fire prevention paint spraying layer and the oversheath that set gradually outside the support improve to a certain extent the utility model discloses a refractiveness, pull resistance and wearability make it more possess safety in utilization and prolonged the utility model discloses a life.

Drawings

Fig. 1 is the utility model provides a multiple fireproof cable structure sketch map.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a multiple fireproof cable includes cable core 1 of predetermined quantity, in this embodiment, the quantity of cable core 1 is three, each cable core 1 all includes a conductor 11 and sets gradually a high temperature resistant buffer layer 12 and an insulating layer 13 outside the conductor 11, each cable core 1 separates the setting each other through a support 2, be equipped with a filling layer 21 in the support 2, the filling of filling layer 21 is filled with thermoplasticity low smoke and zero halogen polyolefin flame retardant material, each cable core 1 with the clearance department of support 2 is filled with high temperature resistant mineral substance rope 3, support 2 has set gradually a flame retardant coating 4, a stainless steel wire 5, a fire prevention paint spraying layer 6 and an oversheath 7 outward.

The support 2 is an aluminum support 2, the support 2 includes a frame 22 having a circular structure and three connecting frames 23 disposed in the frame 22, the frame 22 is not limited to be circular, but may also have other shapes, one end of each connecting frame 23 is connected to the frame 22, one end of each connecting frame 23 away from the frame 22 intersects with a circle center of the frame 22, and each cable core 1 is disposed in a gap between the frame 22 and each connecting frame 23. The support 2 separates each cable core 1 separately and sets up, can play good shielding effect, and each conductor 11 is provided with outward insulating layer 13, support 2 with insulating layer 13 cooperation can effectively avoid each cable core 1 mutual interference or receive external disturbance, influence signal transmission stability, and aluminium system support 2 can absorb a large amount of heat energy (the melting temperature of aluminium is 660 ℃, the heat of melting reaches 11670J/mol) when high temperature oxidation simultaneously, and the formation barrier of aluminium trioxide heat, and the thermal-insulated effect is obvious, can slow down the fire source and strike, and the indirectness reaches fire-retardant effect. The thermoplastic low-smoke halogen-free polyolefin oxygen insulation material filled in the filling layer 21 contains a flame retardant, a high-efficiency flame-retardant synergist and an antioxidant, has excellent flame retardant performance and self-extinguishing property when being away from fire, and a burnt material is still attached to a cable to form a hard carbon shell layer, so that oxygen and heat are isolated, and continuous combustion is effectively prevented.

The high-temperature-resistant mineral rope 3 filled in the gap between each cable core 1 and the support 2 is a rock wool rope, the high-temperature-resistant mineral rope 3 is made of natural rock, the natural rock is melted, and then the natural rock is blown under a certain pressure and quenched into fibers, and then the fibers are made into rope bodies. The high-temperature-resistant mineral rope 3 can resist high temperature of hundreds or even thousands of degrees centigrade, has excellent heat insulation and high-temperature resistance, belongs to inorganic silicate fiber and cannot be combusted. The high-temperature-resistant mineral rope 3 is tightly filled in the gap between each cable core 1 and the support 2, so that no gap is left between the cable cores 1 to the maximum extent, the contact surface between air and the cable cores 1 is reduced, and the effects of oxygen isolation and flame retardance are achieved.

The insulating layer 13 is a crosslinked polyethylene insulating layer 13, such as a silane crosslinked polyethylene insulating layer 13, which has good insulating property and heat conduction property, can reduce dielectric loss in the cable operation, improve the electrical property of the cable, and increase the current-carrying capacity of the cable, and the silane crosslinked polyethylene insulating layer 13 is a thermosetting material which cannot be burnt, has good physical and mechanical properties and thermal properties, and improves the stability of cable signal transmission. The high-temperature-resistant buffer layer 12 is a high-temperature modified silicone rubber layer or a high-temperature acrylate resin layer, the influence of temperature on the conductor 11 can be reduced and delayed under the conditions of high temperature or fire, the fire-resistant layer 4 is a fire-resistant mica tape wrapping layer or a high-flame-retardant glass fiber fire-resistant layer, the stainless steel wire woven layer 5 is a bidirectional woven fabric with the weaving density of not less than 95%, and the outer sheath 7 is a flame-retardant nylon outer sheath 7, so that the cable has the advantages of high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, oil resistance, weak acid resistance, alkali resistance and common solvents, good electrical insulation, self-extinguishing property and no toxicity, is high in strength and good in wear resistance, is not prone to generate sparks due to friction and collision, cannot generate gas even if high-temperature combustion occurs, causes damage to human bodies, and improves the safety performance. The oversheath 7 the fire prevention paint spraying layer 6 flame retardant coating 4 support 2 and its filling layer 21, each high temperature resistant mineral substance rope 3 reaches high temperature resistant buffer layer 12 mutually supports each other, has improved the high temperature resistant, fire prevention fire behavior of cable, can give under the high temperature conflagration condition 11 protection layer upon layer makes the cable also can realize stable signal transmission under the high temperature conflagration condition, provides the convenience and the chance of reporting to the police and saving oneself for the people in the conflagration, makes the people of saving fire can in time launch the rescue. Stainless steel wire weaving layer 5 is provided with outward fire prevention paint spraying layer 6, fire prevention paint spraying layer 6 is provided outward fire-retardant nylon oversheath 7, stainless steel wire weaving layer 5 fire prevention paint spraying layer 6 reaches fire-retardant nylon oversheath 7 cooperation, when guaranteeing that the cable is high temperature resistant, fire behavior, has improved the tensile strength of cable, is that the cable is in the equipment removal when the pulling force of bringing, each conductor 11 is not stretched, each layer is not broken by the drawing except cable core 1, guarantees the safety in utilization and the life of cable.

The embodiment provides multiple fireproof cable, under the conflagration condition, oversheath 7 the fire prevention paint layer 6 stainless steel wire weaving layer 5 with flame retardant coating 4 constitutes right 11 a heavy fire protection of conductor, support 2 constitutes right 11 a heavy fire protection of conductor, the filling layer 21 is right 11 a heavy fire protection of conductor, each high temperature resistant mineral substance rope 3 constitutes right 11 a quadruple fire protection of conductor makes multiple fireproof cable also can maintain stable unblocked signal transmission in the longer time under high temperature, the conflagration condition, and the security is high, in addition, multiple fireproof cable has good shielding effect, and tensile and wear resistance are good, long service life.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a multiple fireproof cable, includes predetermined quantity's cable core, its characterized in that, each the cable core all includes a conductor and sets gradually a high temperature resistant buffer layer and an insulating layer outside the conductor, each the cable core separates the setting each other through a support, the support is aluminium system support, be provided with a filling layer in the support, the filling layer intussuseption is filled with thermoplasticity low smoke and zero halogen polyolefin fire-retardant material, each the cable core with the clearance of support is filled with high temperature resistant mineral substance rope, a flame retardant coating, a stainless steel wire weaving layer, a fireproof paint layer and an oversheath have set gradually outward to the support.

2. The multi-layer fireproof cable according to claim 1, wherein the high-temperature-resistant buffer layer is a high-temperature modified silicone rubber layer or a high-temperature acrylate resin layer, the high-temperature-resistant mineral rope is a rock wool rope, the fire-resistant layer is a fire-resistant mica tape wrapping layer or a high-fire-resistant glass fiber fire-resistant layer, and the outer sheath is a fire-resistant nylon outer sheath.

3. The multiple fire-resistant cable of claim 1, wherein said frame includes a frame and a predetermined number of connection frames disposed within said frame, each of said connection frames having one end connected to said frame and the other end intersecting each other at a cross-sectional center of said frame, each of said cable cores being disposed within a gap between said frame and each of said connection frames.

4. The multiple fire-protected cable of claim 1, wherein said insulating layer is a cross-linked polyethylene insulating layer.