CN202905275U

CN202905275U - Waterproof, torsion-resistant and fireproof power cable

Info

Publication number: CN202905275U
Application number: CN 201220480002
Authority: CN
Inventors: 赵家玉
Original assignee: TONGLING CITY TONGDU SPECIAL CABLE CO Ltd
Current assignee: TONGLING CITY TONGDU SPECIAL CABLE CO Ltd
Priority date: 2012-09-20
Filing date: 2012-09-20
Publication date: 2013-04-24
Anticipated expiration: 2022-09-20

Abstract

The utility model discloses a waterproof, torsion-resistant and fireproof power cable which comprises a plurality of sets of conductors. A composite insulating layer and a mica strip are successively coated outside each set of conductor, and an insulating wire core is formed. The composite insulating layer is composed of the following components successively from inner part to outer part: a coiled semi-conductive nylon strip, a polyvinyl chloride insulating layer and a semi-conductive shielding layer. A plurality of insulating wire cores are intertwisted for forming a cable core. A radial water-blocking buffer layer is coated outside the cable core. An inner sheath which is formed through cross-weaving is coated outside the radial water-blocking buffer layer. A nonwoven wrapping belt and a sheath layer are successively coated outside the inner sheath. A filling layer is provided between the cable core and the radial water-blocking buffer layer. The waterproof, torsion-resistant and fireproof power cable has the following advantages: simple structure, better insulating performance, better fireproof characteristic, capability for high-temperature fire burning for a long time period, high use safety of the power cable, better waterproof performance, better torsion resistance and long service life.

Description

A kind of waterproof warp resistance fireproof power cable

Technical field

The utility model relates to the electric wire field, is specially a kind of waterproof warp resistance fireproof power cable.

Background technology

Along with the fast development of power industry, urban construction, all trades and professions are more and more higher to the requirement of cable.Existing power cable insulation performance is not good; fire resistance is relatively poor, when breaking out of fire, and the not flame resistant baking of this class cable; be difficult to isolated flame; therefore flame these protective layers that are easy to ablate make cable directly be subject to the calcination of flame, have potential safety hazard; and the water resistance of common power cable is not good; anti-twist scarce capacity is affected by infiltration, distortion easily, and shortens the useful life of cable.

The utility model content

The purpose of this utility model provides a kind of waterproof warp resistance fireproof power cable, not good to solve power cable insulation performance traditional in the prior art, fire resistance is relatively poor, cable was affected by the flame calcination easily and causes decreasing insulating when fire occured, there is potential safety hazard, and water resistance is not good, and anti-twist scarce capacity is easily seeped water, twists the problem that affects and cause shortening in cable useful life.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of waterproof warp resistance fireproof power cable, include the array conductor, it is characterized in that: every group of conductor all is coated with composite insulation layer and mica tape outward successively, and formation insulated wire cores, described composite insulation layer is followed successively by wrapped semiconductive nylon tape from inside to outside, polyvinyl chloride insulation layer and semiconductive shielding layer, the stranded formation cable core of several insulated wire cores, described cable core is coated with the radial water-resisting resilient coating, described radial water-resisting resilient coating is coated with the inner sheath that interlacing consists of, described inner sheath is coated with nonwoven fabrics twining package tape and restrictive coating outward successively, is provided with packed layer between described cable core and the radial water-resisting resilient coating.

Described a kind of waterproof warp resistance fireproof power cable is characterized in that: described restrictive coating adopts flame-proof polyvinyl chloride to make.

Described a kind of waterproof warp resistance fireproof power cable is characterized in that: described packed layer is the intumescent inserts that blocks water.

The beneficial effects of the utility model are:

The utility model is simple in structure, adopts the design of composite insulation layer and mica tape, has effectively promoted insulation property and the fire-resistance property of power cable, can stand for a long time the thermal-flame calcination, has ensured the use safety of power cable; Adopt the design of radial water-resisting resilient coating, after water entered oversheath, the material water-proof material water-swellable stoped moisture further to spread along cable, has good waterproof action; Inner sheath adopts the design of interlacing, and the interlacing structure has larger extending space, has effectively promoted the anti-twist ability of cable, has prolonged the useful life of cable.

Description of drawings

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

Embodiment

As shown in Figure 1, a kind of waterproof warp resistance fireproof power cable, include array conductor 1, every group of conductor 1 outer composite insulation layer and mica tape 5 of all being coated with successively, and formation insulated wire cores, composite insulation layer is followed successively by wrapped semiconductive nylon tape 2 from inside to outside, polyvinyl chloride insulation layer 3 and semiconductive shielding layer 4, the stranded formation cable core of several insulated wire cores, cable core is coated with radial water-resisting resilient coating 6, radial water-resisting resilient coating 6 is coated with the inner sheath 7 that interlacing consists of, be coated with successively nonwoven fabrics twining package tape 8 and restrictive coating 9 outside the inner sheath 7, be provided with packed layer 10 between cable core and the radial water-resisting resilient coating 6.

Restrictive coating 9 adopts flame-proof polyvinyl chlorides to make, and packed layer 10 is the intumescent inserts that blocks water.

Claims

1. waterproof warp resistance fireproof power cable, include the array conductor, it is characterized in that: every group of conductor all is coated with composite insulation layer and mica tape outward successively, and formation insulated wire cores, described composite insulation layer is followed successively by wrapped semiconductive nylon tape from inside to outside, polyvinyl chloride insulation layer and semiconductive shielding layer, the stranded formation cable core of several insulated wire cores, described cable core is coated with the radial water-resisting resilient coating, described radial water-resisting resilient coating is coated with the inner sheath that interlacing consists of, described inner sheath is coated with nonwoven fabrics twining package tape and restrictive coating outward successively, is provided with packed layer between described cable core and the radial water-resisting resilient coating.

2. a kind of waterproof warp resistance fireproof power cable according to claim 1 is characterized in that: described restrictive coating adopts flame-proof polyvinyl chloride to make.

3. a kind of waterproof warp resistance fireproof power cable according to claim 1 is characterized in that: described packed layer is the intumescent inserts that blocks water.