CN215450968U

CN215450968U - Stretch-proofing fire-retardant fire resisting cable

Info

Publication number: CN215450968U
Application number: CN202121818239.1U
Authority: CN
Inventors: 孙波
Original assignee: Wuxi Wanhan Cable Co ltd
Current assignee: Wuxi Wanhan Cable Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-07
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to the technical field of cables, in particular to a stretch-resistant flame-retardant fire-resistant cable which comprises three groups of cable cores, wherein each cable core sequentially comprises a conductor, an inner insulating layer and a shielding layer from inside to outside, a blocking frame is arranged in the middle of each three groups of cable cores, a through hole is formed in the middle of each blocking frame, a flame-retardant filling rope is filled in each through hole, a stretch-resistant strip is arranged between every two adjacent groups of cable cores, a wrapping layer is arranged on the outer sides of the three groups of cable cores, and filling layers are filled in gaps among the wrapping layer, the cable cores and the stretch-resistant strips. The cable core is separated by the blocking frame, so that a blocking effect is achieved when a fire disaster happens, meanwhile, the anti-stretching performance of the cable is improved by the combined action of the blocking frame and the anti-stretching strip, and the cable is prevented from being damaged by dragging, dragging and twisting in the erecting process; the flame-retardant filling rope and the filling layer are arranged in the center of the separation frame, so that the flame-retardant and fire-resistant performance of the cable is improved.

Description

Stretch-proofing fire-retardant fire resisting cable

Technical Field

The utility model relates to the technical field of cables, in particular to a stretch-resistant flame-retardant fire-resistant cable.

Background

A cable is a power or signal transmission device, and is generally composed of several wires or groups of wires. With the rapid development of cable laying engineering, the quality requirement of cables is continuously improved, but the cables used in the market have single structural performance, low fire resistance and easy combustion, and neglect the tensile resistance of the cables, so that the cables are easy to break in the laying process, and the electric leakage is caused. Therefore, the tensile flame-retardant fire-resistant cable is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stretch-resistant flame-retardant fire-resistant cable, which solves the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a fire-retardant fire resisting cable of stretch-proofing, includes three cable cores of group, the cable core is by interior and outer including conductor, internal insulation layer and shielding layer in proper order, three groups the cable core middle part is provided with the separation frame, separation frame middle part is equipped with the through-hole, the through-hole intussuseption is filled with fire-retardant packing rope, and is adjacent two sets of be provided with the stretch-proofing strip between the cable core, three groups the cable core outside is equipped with around the covering, it has the filling layer to fill around the space department of covering and cable core and stretch-proofing strip, be provided with the external insulation layer around the covering outside, the external insulation layer outside is equipped with the restrictive coating, the restrictive coating is by interior and outer sheath layer in proper order.

As a further optimization of the technical scheme, the conductor is formed by stranding a plurality of copper wires.

As a further optimization of the technical scheme, the stretch-resistant strip is a polyethylene insulating strip.

As a further optimization of the technical scheme, the inner insulating layer and the outer insulating layer are both crosslinked polyethylene insulating layers.

As a further optimization of the technical scheme, the filling layer is a magnesium oxide mineral filling layer.

As a further optimization of the technical scheme, the buffer layer is a silicone rubber layer.

As a further optimization of the technical scheme, the inner sheath layer and the outer sheath layer are both low-smoke halogen-free polyolefin sheath layers.

Compared with the prior art, the utility model has the beneficial effects that: the cable core is separated by the blocking frame, so that a blocking effect is achieved when a fire disaster happens, meanwhile, the anti-stretching performance of the cable is improved by the combined action of the blocking frame and the anti-stretching strip, and the cable is prevented from being damaged by dragging, dragging and twisting in the erecting process; the flame-retardant filling rope and the filling layer arranged in the center of the barrier frame have the performances of fire prevention, fire resistance, high temperature resistance, thermal insulation and heat insulation, and the flame-retardant and fire-resistant performance of the cable is improved; the arrangement of the inner insulating layer and the outer insulating layer improves the insulating property of the cable, so that the power utilization safety of the cable is improved; the buffer layer is arranged to play a role in buffering, so that damage to the cable caused by strong impact force is reduced; the arrangement of the steel wire armor layer improves the mechanical strength and the anti-corrosion capability of the cable, so that the service life of the cable is prolonged; the inner sheath layer and the outer sheath layer are low-smoke halogen-free polyolefin sheath layers, so that the cable sheath layer has high temperature resistance, fire resistance and flame retardance, and is low in smoke, small in pollution and pollution-reducing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a cable core according to the present invention;

fig. 3 is a schematic structural diagram of the sheath layer of the present invention.

In the figure: 1. a cable core; 101. a conductor; 102. an inner insulating layer; 103. a shielding layer; 2. a barrier frame; 3. a flame retardant filler rope; 4. a stretch resistant strip; 5. wrapping a covering; 6. a filling layer; 7. an outer insulating layer; 8. a sheath layer; 801. an inner jacket layer; 802. a buffer layer; 803. a steel wire armor layer; 804. an outer jacket layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a stretch-proofing fire-retardant fire resisting cable, includes three group's cable cores 1, cable core 1 is from interior to exterior including conductor 101, internal insulation layer 102 and shielding layer 103 in proper order, conductor 101 is formed by the transposition of many copper wires.

The middle parts of the three groups of cable cores 1 are provided with a blocking frame 2, the middle parts of the blocking frames 2 are provided with through holes, flame-retardant filling ropes 3 are filled in the through holes, anti-stretching strips 4 are arranged between two adjacent groups of cable cores 1, the anti-stretching strips 4 are polyethylene insulating strips, the blocking frame 2 separates the cable cores 1, the blocking effect is achieved when a fire disaster happens, meanwhile, the cable cores 1 are loaded, the cable is reinforced, the cable is prevented from being damaged by dragging, dragging and twisting in the erection process, and the anti-stretching performance of the cable is improved under the combined action of the anti-stretching strips 4; the flame-retardant filling rope 3 has the performances of fire prevention, flame retardance, high temperature resistance, thermal insulation and heat insulation, and the flame-retardant and fire-resistant performances of the cable are improved.

The three groups of the cable cores are provided with the wrapping layers 5 on the outer sides of the cable cores 1, the filling layers 6 are filled in gaps among the wrapping layers 5, the cable cores 1 and the stretch-resistant strips 4, and the filling layers 6 are magnesium oxide mineral filling layers, so that the cable has the performances of fire prevention, fire resistance, high temperature resistance, temperature insulation and heat insulation, and the flame-retardant and fire-resistant performances of the cable are improved.

An outer insulating layer 7 is arranged on the outer side of the wrapping layer 5, and the inner insulating layer 102 and the outer insulating layer 7 are both cross-linked polyethylene insulating layers, so that the insulating property of the cable is improved, and the electricity safety of the cable is further improved.

The outer side of the outer insulating layer 7 is provided with a sheath layer 8, the sheath layer 8 sequentially comprises an inner sheath layer 801, a buffer layer 802, a steel wire armor layer 803 and an outer sheath layer 804 from inside to outside, and the buffer layer 802 is a silicone rubber layer and plays a role in buffering, so that damage of strong impact force to cables is reduced; the steel wire armor layer 803 improves the mechanical strength and the anti-corrosion capability of the cable, so that the service life of the cable is prolonged; inner sheath layer 801 and outer sheath layer 804 are low smoke and zero halogen polyolefin restrictive coating, and low smoke and zero halogen polyolefin restrictive coating has high temperature resistant, fire-resistant and flame retardant property to low cigarette, it is little to pollute.

Specifically, when the cable is used, the cable core 1 is separated through the separation frame 2, so that a separation effect is achieved when a fire disaster occurs, meanwhile, the anti-stretching performance of the cable is improved through the combined action of the separation frame 2 and the anti-stretching strips 4, and the cable is prevented from being damaged by dragging, dragging and twisting in the erection process; the flame-retardant filling rope 3 and the filling layer 6 arranged at the center of the barrier frame 2 have the performances of fire prevention, fire resistance, high temperature resistance, temperature insulation and heat insulation, and the flame-retardant and fire-resistant performance of the cable is improved; the arrangement of the inner insulating layer 102 and the outer insulating layer 7 improves the insulating property of the cable, so that the power utilization safety of the cable is improved; the buffer layer 802 is arranged to play a role in buffering, so that damage to the cable caused by strong impact force is reduced; the arrangement of the steel wire armor layer 803 improves the mechanical strength and the anti-corrosion capability of the cable, thereby prolonging the service life of the cable; be the setting of low smoke and zero halogen polyolefin restrictive coating through inner sheath layer 801 and outer sheath layer 804 for cable sheath layer 8 has high temperature resistant, fire-resistant and flame retardant property, and low cigarette, and it is little to pollute, reduces the pollution nature.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fire-retardant fire resisting cable of stretch-proofing, includes three cable cores (1), its characterized in that: the cable core (1) comprises a conductor (101), an inner insulating layer (102) and a shielding layer (103) from inside to outside in sequence, the middle parts of the three groups of cable cores (1) are provided with a barrier frame (2), a through hole is arranged in the middle of the separation frame (2), flame-retardant filling ropes (3) are filled in the through hole, anti-stretching strips (4) are arranged between two adjacent groups of cable cores (1), wrapping layers (5) are arranged on the outer sides of the three groups of cable cores (1), a filling layer (6) is filled in the gap between the wrapping layer (5) and the cable core (1) and between the wrapping layer and the stretch-proofing strip (4), an outer insulating layer (7) is arranged on the outer side of the wrapping layer (5), a sheath layer (8) is arranged on the outer side of the outer insulating layer (7), the sheath layer (8) sequentially comprises an inner sheath layer (801), a buffer layer (802), a steel wire armor layer (803) and an outer sheath layer (804) from inside to outside.

2. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the conductor (101) is formed by stranding a plurality of copper wires.

3. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the stretch-proof strip (4) is a polyethylene insulating strip.

4. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the inner insulating layer (102) and the outer insulating layer (7) are both cross-linked polyethylene insulating layers.

5. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the filling layer (6) is a magnesium oxide mineral filling layer.

6. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the buffer layer (802) is a silicon rubber layer.

7. The stretch-resistant, flame-retardant, and fire-resistant cable of claim 1, wherein: the inner sheath layer (801) and the outer sheath layer (804) are low-smoke halogen-free polyolefin sheath layers.