CN215770647U

CN215770647U - Double-layer co-extrusion insulation irradiation cross-linking halogen-free low-smoke flame-retardant power cable

Info

Publication number: CN215770647U
Application number: CN202121639797.1U
Authority: CN
Inventors: 沈在安; 朱高骏; 万宝祥
Original assignee: Jiangsu Changdejia Cable Co ltd
Current assignee: Jiangsu Changdejia Cable Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-02-08
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable in the technical field of power cables, which comprises a cable core, wherein a double-layer co-extrusion heterogeneous insulating layer is arranged outside the cable core, a halogen-free low-smoke flame-retardant polyolefin inner sheath is arranged outside the double-layer co-extrusion heterogeneous insulating layer, a filling layer is arranged between the halogen-free low-smoke flame-retardant polyolefin inner sheath and the double-layer co-extrusion heterogeneous insulating layer, an armor layer is arranged outside the halogen-free low-smoke flame-retardant polyolefin inner sheath, a halogen-free low-smoke flame-retardant polyolefin outer sheath is arranged outside the armor layer, and a halogen-free low-smoke flame-retardant outer layer is arranged outside the halogen-free low-smoke flame-retardant polyolefin outer sheath.

Description

Double-layer co-extrusion insulation irradiation cross-linking halogen-free low-smoke flame-retardant power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable.

Background

At present, the polyvinyl chloride insulated wire is mostly used as an indoor wiring wire in the building industry of China. The polyvinyl chloride insulated wire has the advantages of light weight, low price, good electrical insulation, good flame retardance and the like, thereby being popular with consumers. However, the polyvinyl chloride insulated wire has a safety hazard in the use process. Especially, in case of fire accident, the electric wire generates a great amount of smoke and halogen acid gas due to burning, and the smoke and gas seriously affect the fire fighting efficiency of fire fighters, even endanger their life safety, and cause so-called "secondary disaster", and besides, the corrosive halogen acid gas corrodes furniture and household appliances. Nowadays, people's awareness of environmental protection is increasing, and related regulations in China, polyvinyl chloride insulated wires are gradually being extruded, and replaced by halogen-free environmentally-friendly wires with flame retardant properties. The environment-friendly electric wire has the advantages of prolonging the service life of the electric wire, effectively preventing the electric wire from being aged in advance and reducing the occurrence probability of fire. Therefore, we propose a double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

double-deck crowded insulation irradiation crosslinked halogen-free low smoke flame retardant power cable altogether, including the cable core, the outside of cable core is provided with double-deck crowded heterogeneous insulating layer altogether, double-deck crowded heterogeneous insulating layer outside of altogether is provided with halogen-free low smoke flame retardant polyolefin inner sheath, be provided with the filling layer between halogen-free low smoke flame retardant polyolefin inner sheath and the double-deck crowded heterogeneous insulating layer altogether, halogen-free low smoke flame retardant polyolefin inner sheath outside is provided with the armor, the outside of armor is provided with halogen-free low smoke flame retardant polyolefin oversheath, halogen-free low smoke flame retardant polyolefin oversheath outside is provided with halogen-free low smoke flame retardant skin.

Further: the double-layer co-extrusion heterogeneous insulating layer comprises an outer insulating layer and an inner insulating layer, the inner insulating layer is arranged outside the cable core, and the outer insulating layer is arranged outside the inner insulating layer.

Further: the outer insulating layer and the inner insulating layer are both made of silane crosslinked polyethylene insulation.

Further: the filling layer is halogen-free low-smoke flame-retardant filler.

Further: the armor layer is made of a galvanized steel strip with a steel grade of Q215A and a zinc layer with a code number of R275.

Further: the outer part of the halogen-free low-smoke flame-retardant layer is provided with an insulating wear-resistant outer layer.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the flame retardance and the environmental protection of the power cable are improved and the service life is prolonged by the double-layer co-extrusion heterogeneous insulating layer, the filling layer, the halogen-free low-smoke flame-retardant polyolefin inner sheath, the halogen-free low-smoke flame-retardant polyolefin outer sheath and the halogen-free low-smoke flame-retardant outer layer.

2. The armor layer can protect the cable core and resist the action of mechanical external force, the insulating wear-resistant outer layer improves the wear-resisting property of the cable, and the service life of the cable is prolonged.

Drawings

FIG. 1 is a schematic structural view of a double-layer co-extruded insulation irradiation cross-linked halogen-free low-smoke flame-retardant power cable according to the present invention;

in the figure: 1 cable core, 2 double-deck crowded heterogeneous insulating layers altogether, 21 outer insulating layers, 22 inner insulating layers, 3 filling layers, 4 no halogen low smoke flame retardant polyolefin inner sheaths, 5 armor layers, 6 no halogen low smoke flame retardant polyolefin oversheath, 7 no halogen low smoke flame retardant skin, 8 insulating wear-resisting skin.

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.

Example 1:

referring to fig. 1, the present invention provides a technical solution: a double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable comprises a cable core 1, a double-layer co-extrusion heterogeneous insulation layer 2 is arranged outside the cable core 1, the double-layer co-extrusion heterogeneous insulation layer 2 comprises an outer insulation layer 21 and an inner insulation layer 22, the inner insulation layer 22 is arranged outside the cable core 1, the outer insulation layer 21 is arranged outside the inner insulation layer 22, the outer insulation layer 21 and the inner insulation layer 22 are made of silane crosslinked polyethylene insulation, the silane crosslinked polyethylene insulation material has good mechanical property and electrical property and does not contain halogen, combustion products are carbon dioxide and water, the double-layer co-extrusion heterogeneous insulation layer 2 is good in environmental protection performance, a halogen-free low-smoke flame-retardant polyolefin inner sheath 4 is arranged outside the double-layer co-extrusion heterogeneous insulation layer 2, a filling layer 3 is arranged between the halogen-free low-smoke flame-retardant polyolefin inner sheath 4 and the double-layer co-extrusion heterogeneous insulation layer 2, and the filling layer 3 is halogen-free low-smoke flame-retardant filler, there is not steamed low fire-retardant polyolefin inner sheath 4 outside that is provided with armor 5, the material of armor 5 is the galvanized steel strip that the steel number is Q215A zinc layer code number is R275, the galvanized steel strip adopts double-deck clearance to overlap and cover around the package, two-layer simultaneously around the package, armor 5 has the effect of protection cable core and resisting mechanical external force, armor 5's outside is provided with no steamed low fire-retardant polyolefin oversheath 6 of cigarette, there is not steamed low fire-retardant polyolefin oversheath 6 outside is provided with steamed low fire-retardant skin 7 of cigarette, filling layer 3, there is not steamed low fire-retardant skin 7 of cigarette, steamed low fire-retardant polyolefin inner sheath 4 of cigarette and steamed low fire-retardant polyolefin oversheath 6 of cigarette have improved power cable's fire behaviour, there is no halogen, low cigarette and nontoxic characteristic.

Example 2:

referring to fig. 1, this embodiment is different from the first embodiment in that: the outer layer 8 of insulating wear-resisting is provided with in the outside of the outer layer 7 of halogen-free low smoke flame retardant, and insulating wear-resisting outer layer 8 has improved the wear resistance of cable, has improved the barrier propterty of cable.

The working principle is as follows: the materials of the outer insulating layer 21 and the inner insulating layer 22 are silane crosslinked polyethylene insulation, the silane crosslinked polyethylene insulation material has good mechanical property and electrical property, no halogen is contained in the silane crosslinked polyethylene insulation material, the combustion products are carbon dioxide and water, the silane crosslinked polyethylene insulation material has good environmental performance, the filling layer 3, the halogen-free low-smoke flame-retardant outer layer 7, the halogen-free low-smoke flame-retardant polyolefin inner sheath 4 and the halogen-free low-smoke flame-retardant polyolefin outer sheath 6 improve the flame retardant property of the power cable, and the silane crosslinked polyethylene insulation material has the characteristics of being halogen-free, low-smoke and non-toxic, and the armor layer 5 has the functions of protecting the cable core and resisting mechanical external force.

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. Double-deck crowded insulation irradiation crosslinked halogen-free low smoke flame retardant power cable altogether, including cable core (1), its characterized in that: the outside of cable core (1) is provided with double-deck crowded heterogeneous insulating layer altogether (2), double-deck crowded heterogeneous insulating layer altogether (2) outside is provided with halogen-free low cigarette fire-retardant polyolefin inner sheath (4), be provided with between halogen-free low cigarette fire-retardant polyolefin inner sheath (4) and the double-deck crowded heterogeneous insulating layer altogether (2) filling layer (3), halogen-free low cigarette fire-retardant polyolefin inner sheath (4) outside is provided with armor (5), the outside of armor (5) is provided with halogen-free low cigarette fire-retardant polyolefin oversheath (6), halogen-free low cigarette fire-retardant polyolefin oversheath (6) outside is provided with halogen-free low cigarette fire-retardant outer skin (7).

2. The double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable according to claim 1, characterized in that: the double-layer co-extrusion heterogeneous insulating layer (2) comprises an outer insulating layer (21) and an inner insulating layer (22), wherein the inner insulating layer (22) is arranged outside the cable core (1), and the outer insulating layer (21) is arranged outside the inner insulating layer (22).

3. The double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable according to claim 2, characterized in that: the outer insulating layer (21) and the inner insulating layer (22) are both made of silane crosslinked polyethylene insulation.

4. The double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable according to claim 1, characterized in that: the filling layer (3) is a halogen-free low-smoke flame-retardant filler.

5. The double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable according to claim 1, characterized in that: the armor layer (5) is made of a galvanized steel strip with a steel grade of Q215A and a zinc layer with a code of R275.

6. The double-layer co-extrusion insulation irradiation crosslinking halogen-free low-smoke flame-retardant power cable according to claim 1, characterized in that: and an insulating wear-resistant outer layer (8) is arranged outside the halogen-free low-smoke flame-retardant outer layer (7).