CN110148492B

CN110148492B - Cross-linked polyethylene insulated fire-resistant flame-retardant power cable

Info

Publication number: CN110148492B
Application number: CN201910553847.5A
Authority: CN
Inventors: 景宝玺; 朱丹; 朱宗明
Original assignee: Jinyuan Electric Group Co ltd
Current assignee: Jinyuan Electric Group Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-30
Anticipated expiration: 2039-06-25
Also published as: CN110148492A

Abstract

The invention discloses a cross-linked polyethylene insulation fire-resistant flame-retardant power cable in the technical field of cables, which comprises a copper conductor, wherein an insulation layer is sleeved on the outer wall of the copper conductor, a shielding layer is sleeved on the outer wall of the insulation layer, a flame-retardant layer is sleeved on the outer wall of the shielding layer, a heat-conducting frame is arranged inside the flame-retardant layer, the ferrule is uniformly arranged inside the flame-retardant layer, a connecting rod is welded between the ferrules, through holes are formed in the outer walls of the ferrule and the connecting rod, a mineral insulation layer is sleeved on the outer wall of the flame-retardant layer, and an outer protective sleeve is sleeved on the outer wall of the mineral insulation layer. The normal power-on time of the related alarm and safety indication equipment is effectively prolonged.

Description

Cross-linked polyethylene insulated fire-resistant flame-retardant power cable

Technical Field

The invention discloses a crosslinked polyethylene insulated fire-resistant flame-retardant power cable, and particularly relates to the technical field of cables.

Background

With the increase of crowded places such as intelligent buildings and high-rise buildings, a crosslinked polyethylene insulated fire-resistant power cable with a rated voltage of 8.7/10kV is used in a power supply system of the facilities. Because the common cross-linked polyethylene insulated power cable has no fire resistance, the power supply line can not be kept to continuously and safely and stably operate under the condition of flame, and when a fire disaster occurs, the cable can quickly catch fire and burn to stop supplying power, so that evacuation and evacuation of people and fire rescue are not facilitated.

Disclosure of Invention

The invention aims to provide a crosslinked polyethylene insulated fire-resistant flame-retardant power cable to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an insulating fire-resistant fire-retardant power cable of crosslinked polyethylene, includes the copper conductor, the outer wall of copper conductor has cup jointed the insulating layer, the outer wall of insulating layer has cup jointed the shielding layer, the outer wall of shielding layer has cup jointed fire-retardant layer, fire-retardant layer is one kind of the fire-retardant layer of magnesium hydrate or aluminium hydroxide, the inside on fire-retardant layer is provided with heat conduction frame, heat conduction frame includes the lasso, the even inside that sets up on fire-retardant layer of lasso, the welding has the connecting rod between the lasso, lasso and connecting rod are hollow structure, lasso and connecting rod intercommunication, the thru hole has all been opened to the outer wall of lasso and connecting rod, the outer wall on fire-retardant layer has cup jointed the mineral insulation layer, the outer protective sheath has.

Preferably, the insulating layer and the outer protective sleeve are both of a cross-linked polyethylene structure.

Preferably, the mineral insulating layer is a calcined mica tape lapping insulating layer.

Compared with the prior art, the invention has the beneficial effects that: this device is provided with heat conduction frame in the inside on fire-retardant layer, the cable is when meeting with the conflagration, local fire-retardant layer is heated and makes heat conduction frame be heated the heat conduction, make the fire-retardant layer of the heat conduction frame department of being heated be heated and decompose vapor, internal pressure increases because of the cable is heated, vapor passes through the inner chamber that the thru hole got into the connecting rod lasso, vapor passes through connecting rod and lasso and removes towards the damaged department of cable combustion, reduce the oxygen content of the damaged department of combustion, form the vapor curtain at the combustor surface simultaneously, make flame and air isolated, effectively prolong fire-retardant layer flame retardant time, effectively prolong relevant warning and safety indicator's normal on-time.

Drawings

FIG. 1 is a schematic structural view of a cross-linked polyethylene insulated fire-resistant flame-retardant power cable according to the present invention;

fig. 2 is a right-side view of the heat-conducting frame according to the present invention.

In the figure: 100 copper conductors, 110 insulation layers, 120 shielding layers, 200 flame retardant layers, 210 heat conducting frames, 211 ferrules, 212 connecting rods, 213 through holes, 300 mineral insulation layers, 400 outer protective sleeves.

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.

The invention provides a cross-linked polyethylene insulated fireproof flame-retardant power cable, which effectively prolongs the flame-retardant time of a flame-retardant layer and effectively prolongs the normal power-on time of related alarm and safety indication equipment, and please refer to fig. 1, the cross-linked polyethylene insulated fireproof flame-retardant power cable comprises a copper conductor 100, wherein an insulating layer 110 is sleeved on the outer wall of the copper conductor 100, a shielding layer 120 is sleeved on the outer wall of the insulating layer 110, the insulating layer 110 is made of cross-linked polyethylene, and is extruded and wrapped on the outer wall of the copper conductor 100 through the cross-linked polyethylene for improving the insulativity of the copper conductor 100, the shielding layer 120 is a soft copper wire, and the soft copper wire is twisted on the outer wall of the;

referring to fig. 1 and 2, the outer wall of the shielding layer 120 is sleeved with the flame retardant layer 200, the heat conducting frame 210 is arranged inside the flame retardant layer 200, the heat conducting frame 210 includes a ferrule 211, the ferrule 211 is uniformly arranged inside the flame retardant layer 200, a connecting rod 212 is welded between the ferrules 211, the ferrule 211 and the connecting rod 212 are both hollow structures, the ferrule 211 is communicated with the connecting rod 212, the outer walls of the ferrule 211 and the connecting rod 212 are both provided with through holes 213, the flame retardant layer 200 is one of magnesium hydroxide or aluminum hydroxide flame retardant layers, both of which can decompose water when heated, and when the heat conducting frame 210 is heated, water vapor enters the inner cavities of the ferrule 211 and the connecting rod 212 through the through holes 213;

referring to fig. 1, a mineral insulating layer 300 is sleeved on the outer wall of the flame retardant layer 200, the mineral insulating layer 300 is a calcined mica tape insulating layer, and the calcined mica tape is wound around the outer wall of the flame retardant layer 200 in a wrapping manner, so that the calcined mica tape can bear high temperature, and the speed of the high temperature and flame entering the cable is effectively reduced;

referring to fig. 1 again, an outer protective sleeve 400 is sleeved on the outer wall of the mineral insulating layer 300, and the outer protective sleeve 400 is made of cross-linked polyethylene and is used for flame retardance, compression resistance, wear resistance and the like of the cable.

While the invention has been described with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the invention disclosed may be used in any combination whatsoever without structural conflict, and the failure to exhaustively describe such combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an insulating fire-resistant fire-retardant power cable of crosslinked polyethylene which characterized in that: the cable comprises a copper conductor (100), an insulating layer (110) is sleeved on the outer wall of the copper conductor (100), a shielding layer (120) is sleeved on the outer wall of the insulating layer (110), a flame-retardant layer (200) is sleeved on the outer wall of the shielding layer (120), the flame-retardant layer (200) is one of flame-retardant layers of magnesium hydroxide or aluminum hydroxide, a heat-conducting frame (210) is arranged inside the flame-retardant layer (200), the heat-conducting frame (210) comprises a ferrule (211), the ferrule (211) is uniformly arranged inside the flame-retardant layer (200), a connecting rod (212) is welded between the ferrules (211), the ferrule (211) and the connecting rod (212) are both of a hollow structure, the ferrule (211) and the connecting rod (212) are communicated, through holes (213) are formed in the outer walls of the ferrule (211) and the connecting rod (212), a mineral insulating layer (300) is sleeved on the outer wall of the flame-retardant layer, and an outer protective sleeve (400) is sleeved on the outer wall of the mineral insulating layer (300).

2. The fire-resistant and flame-retardant power cable of claim 1, wherein: the insulating layer (120) and the outer protective sleeve (400) are both of a cross-linked polyethylene structure.

3. The fire-resistant and flame-retardant power cable of claim 1, wherein: the mineral insulating layer (300) is a calcined mica tape wrapping insulating layer.