CN201408599Y

CN201408599Y - Power cable with fireproof, flame resistance and waterproof functions

Info

Publication number: CN201408599Y
Application number: CN2009200688919U
Authority: CN
Inventors: 林志彬; 金伟龙; 侯延龙
Original assignee: SHANDONG SOCO CABLE GROUP CO Ltd
Current assignee: SHANDONG SOCO CABLE GROUP CO Ltd
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2010-02-17
Anticipated expiration: 2019-03-16

Abstract

The utility model relates to a power cable with fireproof, flame resistance and waterproof functions, comprising a cable inner core and a cable outer layer coating the cable inner core; wherein a conductor wire core, a fireproof layer and an insulation layer are provided in the cable inner core from inner to outer, a high flame resistant wrapping band, a polyester layer, a waterproof inner protective sleeve, a copper wire copper band combination shield layer, a waterproof buffer band and a protective layer are provided in the cable outer layer from inner to outer. The power cable can effectively improve flame resistance and waterproof functions, and can avoid generating harmful gas such as hydrogen halide even when the power cable is burnt. The power cable comprises a shield system with aninternal short circuit protection structure, to effectively prevent breakdown or damage caused by strong lightning magnetic effect voltage, thus improving the sensitivity of the overcurrent protection device at end of circuit, and realizing the design requirement of environment protection safe cable.

Description

A kind of have a power cable fire-resistant, fire-retardant, water stop function

Technical field

The utility model relates to a kind of power cable, and particularly a kind of have a power cable fire-resistant, fire-retardant, water stop function.

Background technology

At present, the various power cables outside of extensive use all is enclosed with one deck cable insulation in many buildings at home.All contain halogen mostly in the cable insulation material, after such insulating material is lighted, can produce thick smoke and the very strong hydrogen halide of corrosivity, in case breaking out of fire in the building, both entail dangers to life also can serious environment pollution.

The utility model content

The purpose of this utility model is the safety cable that a kind of fire prevention, waterproof, nontoxic, environmental protection will be provided, still can keep energising under specific disaster scenario.The utility model relates to a kind of power cable fire-resistant, fire-retardant, water stop function that has; comprise the cable inner core and wrap in the outer cable outer layer of cable inner core; it is characterized in that: described cable inner core inside is followed successively by conductor wire core, flame retardant coating, insulating barrier from inside to outside, and described cable outer layer inside is followed successively by high flame retardant twining package tape, polyester layer, the inner sheath that blocks water, copper wire copper strips combination screen from inside to outside, buffer strip and protective layer block water.The number of the cable inner core in the described cable outer layer is one or more.The material of described conductor wire core is a high-purity anaerobic bar.Described flame retardant coating is a refractory synthetic mica tape.Described polyester layer is a waterproof rubber fat.Described copper wire copper strips combination screen is made up of the some soft round copper wires copper strips outer with wrapping in copper wire.Described protective layer is the halogen-free intumescent flame-retardant protective layer.Advantage of the present utility model is: the utility model has effectively strengthened the effect of fire prevention and water-proof function; even if can not produce pernicious gases such as hydrogen halides after being lighted yet; inside is provided with the shielding harness of short-circuit protection structure; puncture or the damage of effectively having avoided powerful thunder and lightning magnetic effect voltage to be caused; improved the sensitivity of circuit road end overcurrent protective device; reached the designing requirement of environmental type safety cable; be widely used in hospital; boats and ships; the power station; subway; in the building such as tunnel, in the mine; metallurgical; in the particular surroundingss such as the intensive place of equipment of industries such as petrochemical industry.

Description of drawings

Accompanying drawing 1 is provided with three section of structures under the cable inner core situation in the utility model,

Accompanying drawing 2 is provided with four section of structures under the cable inner core situation in the utility model.

Embodiment

Comprise the cable inner core among the figure and wrap in the outer cable outer layer of cable inner core, described cable inner core inside is followed successively by conductor wire core 1, flame retardant coating 2, insulating barrier 3 from inside to outside.The material of described conductor wire core is a high-purity anaerobic bar, and the number of the cable inner core in the described cable outer layer is one or more, generally selects three or four.The cross section of conductor wire core of the present utility model is circular, and its area is about 1.5 ~ 500mm ², the physical strength height of conductor wire core, stability is strong, and its shape is constant, but very little to the curvature influence of cable.Flame retardant coating of the present utility model is a refractory synthetic mica tape.Flame retardant coating surrounds outside the conductor wire core, is wrapped the forming of high-quality mica tape with fire-resistant safety cable special use, good fire resistant flame retardant effect is arranged, and still can keep good dielectric strength under ignition temperature.Insulating barrier of the present utility model is the extrusion modling of low smoke and zero halogen special insulation material, be coated on the outside of flame retardant coating, by crosslinked special processing, change polyethylene line style molecular structure into upright network molecular structure, improved the electric property of product greatly, physical property, mechanical performance and other properties, not only high temperature resistant and have the advantages that to be not easy to spread and can not produce hydrogen halide, cable just can not discharge harmful smog, unlikely causing " secondary disaster " when burning like this.

Described cable outer layer is followed successively by high flame retardant twining package tape 4, polyester layer 5 from inside to outside, the inner sheath 6 that blocks water, copper wire copper strips combination screen 7, buffer strip 8 and protective layer 9 block water.The high flame retardant twining package tape is overlapping wrapped in the outside of insulating barrier, and described polyester layer is a waterproof rubber fat.

The described inner sheath that blocks water wraps in the polyester layer outside, and the inner sheath that blocks water has the double effects that the acid and alkali-resistance buffering blocks water, and extrudes outside cable insulation, as waterproof construction.The inner sheath that blocks water is met water can prevent rapidly that sealing or other fluid flow into or move in the cable, play the effect in useful life of protection cable extension cable, thereby the inner sheath that blocks water reaches good block-water effect.

Described copper wire copper strips combination screen is made up of the some soft round copper wires copper strips outer with wrapping in copper wire, and soft round copper wire 10 closely wraps on the outer wall of inner covering, and copper strips wraps in copper wire and also oppositely tightens outward.The number of soft round copper wire can dispose in proportion according to the conductor wire core cross-sectional sizes.The shielded type cable of this structure can anti-electromagnetic induction; imperfect earth and power line conduction interference; reduce puncture or damage that inductance avoids powerful big thunder and lightning magnetic effect voltage to be caused; prevent characteristics such as induced electromotive force is excessive; copper wire copper strips combination screen had both played the externally effect of emission of electromagnetic wave that suppresses; can be used as the passage of short circuit current again, can play the protective effect of neutral core.

Described protective layer is the halogen-free intumescent flame-retardant protective layer; the buffer strip that blocks water wraps in the outside of copper wire copper strips combination screen; play slow blocking water; overlapping wrapped the giving at the copper wire copper strips of buffer water-blocking band closed outside the screen; play the effect that blocks water and cushion; behind this band water-swellable, that copper wire copper strips combination screen can be blocked up is watertight, effectively prevents the intrusion of moisture, moisture.

The buffer strip outside sidewall that blocks water tightens the close halogen-free intumescent flame-retardant protective layer that one deck expansion type low-smoke halogen-free flame-retardant polyolefin is made that is surrounded by.The fire-resistant sheath of this novel expansion type flame-retarding, meeting fire can expand rapidly, has good heat insulation effect, has slowed down hot conduction.Be higher than under 1000 ℃ the flame temperature condition, through behind the 90min, the fire-resistant sheath temperature inside of expansion type flame-retarding is no more than 450 ℃.From performance and useful life considerably beyond the fire-resistant sheath of common low-smoke non-halogen flame-retardant.

The utility model makes makes the halogen-free intumescent flame-retardant protective layer; adopting the expansion type flame-retarding technology is the resistance element with nitrogen; under the environment of fire; forming sheath material by acid source (dehydrating agent), carbon source (carbon forming agent) and source of the gas (blowing agent) three parts expands rapidly; the surface forms fine and close porous carbon froth bed; securely attached on the cable, play well heat insulation, oxygen barrier, press down cigarette, and can prevent to produce molten effect.Fire-resistant oversheath has good flame-retardant smoke inhibition and the function of putting out certainly, low cigarette, Halogen, fire-retardantly with clothing high elongation at break (＞350%) is arranged, and easy to process.The flame-retardant effect of halogen-free intumescent flame-retardant protective layer mainly be by the end heat conduction of a heat insulation foaming structure of expansion charcoal layer and to thermal-radiating reflection, every act on, limited to lower floor's polymer oxygen supply and suppress right property degraded gas to emit and prevent effectively the melt and dissolved drippage that polymer combustion produces be to reach the effect of flame-retardant.

Claims

1. one kind has power cable fire-resistant, fire-retardant, water stop function; comprise the cable inner core and wrap in the outer cable outer layer of cable inner core; it is characterized in that: described cable inner core inside is followed successively by conductor wire core, flame retardant coating, insulating barrier from inside to outside, and described cable outer layer inside is followed successively by high flame retardant twining package tape, polyester layer, the inner sheath that blocks water, copper wire copper strips combination screen from inside to outside, buffer strip and protective layer block water.

2. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1 is characterized in that: the number of the cable inner core in the described cable outer layer is one or more.

3. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1, it is characterized in that: the material of described conductor wire core is a high-purity anaerobic bar.

4. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1, it is characterized in that: described flame retardant coating is a refractory synthetic mica tape.

5. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1, it is characterized in that: described polyester layer is a waterproof rubber fat.

6. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1 is characterized in that: described copper wire copper strips combination screen is made up of the some soft round copper wires copper strips outer with wrapping in copper wire.

7. a kind of power cable fire-resistant, fire-retardant, water stop function that has as claimed in claim 1, it is characterized in that: described protective layer is the halogen-free intumescent flame-retardant protective layer.