CN202905278U

CN202905278U - Novel middle-voltage fireproof power cable

Info

Publication number: CN202905278U
Application number: CN 201220651713
Authority: CN
Inventors: 韩惠福; 孙超南; 吕伟堂; 朱崤; 冯保磊; 赵金磊
Original assignee: SIAIT CABLE CO Ltd; ANHUI SIAIT CABLES GROUP Co Ltd
Current assignee: SIAIT CABLE CO Ltd; ANHUI SIAIT CABLES GROUP Co Ltd
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2013-04-24
Anticipated expiration: 2022-11-29

Abstract

The utility model discloses a novel middle-voltage fireproof power cable. A compacted twisted bare-copper conductor, a conductor shielding layer, a chemical-crosslinking polyethylene insulating layer and an insulation shielding layer form a three-layer co-extrusion insulation core; and the conductor shielding layer, the chemical-crosslinking polyethylene insulating layer and the insulation shielding layer are extruded on the conductor. A metal shielding layer wrapped outside of the insulation core by a copper tape in an overlapping manner. A plurality of insulation cores provided with the metal shielding layers are twisted to form a cable core. A halogen-free flame-retardation rope filling layer is mounted on a gap of the cable core. A halogen-free flame-retardation tape lapping layer is wrapped outside of the cable core in an overlapping manner, a ceramic-silicone rubber fireproof layer is extrudes outside of the lapping layer, a halogen-free low-smoke high flame-retardation oxygen barrier layer is extruded outside of the fireproof layer, and two halogen-free low-smoke flame-retardation tapes are wrapped outside of the oxygen barrier layer in the overlapping manner. A thermoplastic halogen-free low-smoke flame-retardation polyolefin oversheath is extruded on an outermost layer of the cable core. The cable has fireproof, halogen-free, low-smoke, high flame retardation, oil resistant and aging resistant characteristics; has excellent mechanical, electric and environment-friendly functions and can be widely applied to important places and emergency places in middle-voltage transmission.

Description

A kind of Novel medium voltage fireproof power cable

Technical field:

The utility model relates to a kind of Novel medium voltage fireproof power cable, belongs to technical field of electric wires and cables.

Background technology:

Fast development along with national economy, be related to the place of the people's safety at some, such as: the important places such as densely populated station, square, airport, emergency evacuation require to adopt fireproof cable, and domestic fireproof cable mainly are for low-pressure system at present.For midium voltage cable, because electric pressure is higher, insulated wire cores adopts three-layer co-extruded chemical crosslinking technology, adopts inapplicable in the method for the overlapping wrapped mica tape of conductive surface.In view of the particularity of middle pressure fire-resisting cable, present many use producers are most of to rely on import, and the import cable is expensive, and the production cycle is long, the development of serious restriction national economy.

The development of domestic middle pressure fire-resisting cable is started late, the technical merit of each producer is uneven, add that centering presses the demand of fire-resisting cable sharply to increase in recent years, and it is more and more higher to the specification requirement of cable, cause many producers because technical force is limited, can not design, produce the middle pressure fireproof power cable product that satisfies specification requirement.Permitted great producer or company, for the most of imported product that adopts of middle pressure fireproof power cable, be unfavorable for pressing in the China development of fire-resisting cable.

Summary of the invention:

For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of Novel medium voltage fireproof power cable, have fire-resistant, Halogen, low cigarette, high flame retardant, oil resistant, the characteristic such as ageing-resistant, also have simultaneously the functions such as excellent machinery, electric, environmental protection, can be widely used in important place and emergent place in the medium-voltage line transmission, product performance index is better than the international standard requirement.

The utility model technical solution problem adopts following technical scheme:

A kind of Novel medium voltage fireproof power cable, consist of three-layer co-extruded insulated wire cores by the conductor shield, processes for chemically crosslinked polyethylene insulating barrier and the insulation screen that press stranded bare copper conductor and extrude on described conductor, described insulated wire cores adopts the overlapping metal screen layer that is surrounded with of soft copper band outward, the many insulated wire cores that are provided with metal screen layer are twisted into cable core, and the cable core gap is provided with halogen-free flameproof rope packed layer;

Described cable core is overlapping successively outward to be surrounded with halogen-free flameproof band lapping layer, be extruded with ceramic silicon rubber flame retardant coating, described flame retardant coating is extruded with one deck halogen-free low-smoke high-flame oxygen barrier layer outward, the outer overlapping two layers of LSOH anti-flaming band that are surrounded with of described oxygen barrier layer, the outermost layer of cable is extruded with the thermoplastic halogen-free and low-smoke flame-retardant polyolefin oversheath.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model flame retardant coating adopts a kind of new ceramics SiClx elastomeric material, under flame condition, this material carbonization crystallization, stop the infiltration of flame and entering of oxygen, inside and outside isolated, guarantee that circuit can normally move more than 90 minutes, the effective guarantee personal safety reduces property loss.

2, flame retardant coating extrudes one deck halogen-free low-smoke high-flame oxygen barrier layer material outward in the utility model, under flame condition, can effectively completely cut off flame, and fire retardancy promotes greatly, has guaranteed the normal operation of cable.

3, extruding the thermoplastic halogen-free and low-smoke flame-retardant polyolefin oversheath in the utility model is a kind of novel environment friendly material, not only have excellent flame-retarding characteristic, environmental-protecting performance, have more Halogen, low cigarette, alkali-free, without asbestos, oil resistant, the characteristic such as ageing-resistant, press the instructions for use of fire-resisting cable in satisfying fully.

Description of drawings:

Fig. 1 is structural representation of the present utility model.

Number in the figure: 1 conductor, 2 conductor shields, 3 insulating barriers, 4 insulation screens, 5 metal screen layers, 6 packed layers, 7 lapping layers, 8 flame retardant coatings, 9 oxygen barrier layers, 10 inhibiting tapes, 11 oversheaths.

Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.

Embodiment:

Embodiment: in conjunction with Fig. 1, the middle pressure fireproof power cable of present embodiment, consist of three-layer co-extruded insulated wire cores by the conductor shield 2, processes for chemically crosslinked polyethylene insulating barrier 3 and the insulation screen 4 that press stranded bare copper conductor 1 and extrude on conductor 1, outside insulated wire cores, adopt the soft copper band overlapping wrapped as metal screen layer 5, many insulated wire cores with metal screen layer are twisted into cable core, and the cable core gap is provided with halogen-free flameproof rope packed layer 6; The overlapping halogen-free flameproof band lapping layer 7 that is surrounded with outside cable core, be extruded with afterwards ceramic silicon rubber flame retardant coating 8, outside flame retardant coating 8, be extruded with one deck halogen-free low-smoke high-flame oxygen barrier layer 9, overlappingly afterwards be surrounded with two layers of LSOH anti-flaming band 10, the outermost layer of cable is extruded with thermoplastic halogen-free and low-smoke flame-retardant polyolefin oversheath 11.

In the implementation, corresponding structure setting and material are selected to be respectively:

Conductor 1 is to adopt the anaerobic bare copper wire to press the strand system to form, conductor layer any surface finish, without burr;

Press semiconductive conductor screen material during conductor shield 2 adopts, and insulation, insulation shielding are three-layer co-extruded together;

Insulating barrier 3 is to be extruded in the layer that extrudes that forms on the conductor screen by processes for chemically crosslinked polyethylene, adopts the three-layer co-extruded technique of chemical crosslinking;

Press semiconductive insulation shielding material during insulation screen 4 adopts, and insulation, conductor screen are three-layer co-extruded together;

Metal screen layer 5 adopts the soft copper band overlapping wrapped on insulation shielding, and Duplication is not less than 15%;

Packed layer 6 adopts the halogen-free flameproof rope, fills rounding;

Lapping layer 7 adopts the halogen-free flameproof band overlapping wrapped in the cable core outside;

Flame retardant coating 8 adopts and extrudes the ceramic silastic material, and through continuous vulcanization technique;

Oxygen barrier layer 9 adopts and extrudes one deck halogen-free low-smoke high-flame polyolefin;

Halogen-free flameproof band 10 adopts double-decker overlapping wrapped in the oxygen barrier layer outside, and Duplication is not less than 15%;

Oversheath 11 adopts and extrudes thermoplastic halogen-free and low-smoke flame-retardant polyolefin.

Claims

1. Novel medium voltage fireproof power cable, it is characterized in that consisting of three-layer co-extruded insulated wire cores by the conductor shield (2), processes for chemically crosslinked polyethylene insulating barrier (3) and the insulation screen (4) that press stranded bare copper conductor (1) and extrude on described conductor (1), described insulated wire cores adopts the overlapping metal screen layer (5) that is surrounded with of soft copper band outward, the many insulated wire cores that are provided with metal screen layer are twisted into cable core, and the cable core gap is provided with halogen-free flameproof rope packed layer (6);

Described cable core is overlapping successively outward to be surrounded with halogen-free flameproof band lapping layer (7), be extruded with ceramic silicon rubber flame retardant coating (8), the outer one deck halogen-free low-smoke high-flame oxygen barrier layer (9) that is extruded with of described flame retardant coating (8), the outer overlapping two layers of LSOH anti-flaming band (10) that are surrounded with of described oxygen barrier layer, the outermost layer of cable is extruded with thermoplastic halogen-free and low-smoke flame-retardant polyolefin oversheath (11).