CN208970223U - Smokeless halogen-free power cable - Google Patents

Abstract

The utility model provides a kind of smokeless halogen-free power cable.The smokeless halogen-free power cable includes: multiple conductor elements, insulating layer of conductor, flame retardant inorganic filler, wrapping layer, fireprotection layer protective metal shell and polyolefin oversheath, wherein multiple conductor elements surround cable center's close-packed arrays；Each conductor element is twisted by multifilament；Insulating layer of conductor is provided with outside each conductor element；Cable core outside insulating layer of conductor is filled by flame retardant inorganic filler, and is tied up by wrapping layer is wrapped；Fireprotection layer protective metal shell is provided with outside wrapping layer；Polyolefin oversheath is provided with outside fireprotection layer protective metal shell.By the utility model, the smog harm to the human body for solving the problems, such as that the fireproof cable burning of low smoke and zero halogen generates is big, improves the security performance of fireproof cable.

Description

Smokeless halogen-free power cable

Technical field

The utility model relates to power cable fields, in particular to a kind of smokeless halogen-free power cable.

Background technique

With the high speed development of China's urban construction especially Construction of Urban Rail Traffic, especially high-rise, Super High is built It builds, the construction of underground communal facility, high-speed rail station, the specific demand of the industries such as offshore oil platform, nuclear power station, chemical industry, coal Deng increase.Security against fire is designed, owner, the relevant departments such as construction as the cardinal task for being related to personal safety Pay attention to.Fireproof cable has obtained the use of large area, and the requirement to low toxicity, low cigarette, Halogen etc. also obtained great dynamics in recent years Reinforcement.It attracts great attention for secondary injury caused by fire.

The first generation product of fireproof cable has the characteristics that low-smoke zero-halogen low-toxicity, and the approval in market has been obtained.But The smog that the fireproof cable burning of low smoke and zero halogen generates still is able to generate biggish injury to human body.

Utility model content

The utility model provides a kind of smokeless halogen-free power cable, at least to solve the fireproof cable burning of low smoke and zero halogen The big problem of the smog harm to the human body of generation.

In a first aspect, the utility model embodiment provides a kind of smokeless halogen-free power cable characterized by comprising Multiple conductor elements, insulating layer of conductor, flame retardant inorganic filler, wrapping layer, fireprotection layer protective metal shell and polyolefin oversheath, In, multiple conductor elements surround cable center's close-packed arrays；Each conductor element is twisted by multifilament；Each conductor Insulating layer of conductor is provided with outside unit；Cable core outside insulating layer of conductor is filled by flame retardant inorganic filler, and by wrapping layer around Packet is tied up；Fireprotection layer protective metal shell is provided with outside wrapping layer；Be provided with outside fireprotection layer protective metal shell be added to hydrotalcite with The polyolefin oversheath of the composite flame-retardant agent of aluminium hydroxide.

By smokeless halogen-free power cable provided by the embodiment of the utility model, which includes: more A conductor element, insulating layer of conductor, flame retardant inorganic filler, wrapping layer, fireprotection layer protective metal shell and polyolefin oversheath, In, multiple conductor elements surround cable center's close-packed arrays；Each conductor element is twisted by multifilament；Each conductor Insulating layer of conductor is provided with outside unit；Cable core outside insulating layer of conductor is filled by flame retardant inorganic filler, and by wrapping layer around Packet is tied up；Fireprotection layer protective metal shell is provided with outside wrapping layer；It is provided with polyolefin oversheath outside fireprotection layer protective metal shell, solves The big problem of smog harm to the human body that the fireproof cable burning of low smoke and zero halogen of having determined generates, improves the safety of fireproof cable Energy.

Detailed description of the invention

Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model It limits.In the accompanying drawings:

Fig. 1 is the structural schematic diagram according to the smokeless halogen-free power cable of the utility model embodiment.

Description of symbols: A: conductor element；B: insulating layer of conductor；C: wrapping layer；D: fireprotection layer protective metal shell；E: outside polyolefin Sheath.

Specific embodiment

The feature and exemplary embodiment of the various aspects of the utility model is described more fully below, in order to keep this practical new The objects, technical solutions and advantages of type are more clearly understood, and with reference to the accompanying drawings and embodiments, carry out the utility model into one Step detailed description.It should be understood that specific embodiment described herein is only used for explaining the utility model, it is not used to limit this reality With novel.To those skilled in the art, the utility model can not need some details in these details In the case where implement.Below the description of embodiment is used for the purpose of providing by showing the example of the utility model to this reality It is better understood with novel.

A kind of smokeless halogen-free power cable is provided in the present embodiment, and Fig. 1 is the nothing according to the utility model embodiment The structural schematic diagram of cigarette Halogen power cable, as shown in Figure 1, the conductor element of the smokeless halogen-free power cable is more using oxygen-free copper Root lay configuration wrapped calcining mica tape and extrudes the composite insulation structure of crosslinked polyethylene insulation material (i.e. outside conductor element Insulating layer of conductor), stranding is filled using flame retardant inorganic filler, and wrapped mica tape and the compound wrapping layer of inhibiting tape；Compound The copper strips of 99.5% or more copper content is used to be welded into fireprotection layer protective metal shell outside wrapping layer；Tool is extruded outside fireprotection layer protective metal shell There is the polyolefin flame-retardant material of smokeless halogen-free characteristic as oversheath.Wherein, compound resistance is added in the polyolefin flame-retardant material Agent is fired, composite flame-retardant agent includes aluminium hydroxide 80%, the hydrotalcite 20% according to quality meter；Composite flame-retardant agent plays smog simultaneously The effect of inhibitor, it is smokeless so as to achieve the effect that.

Hydrotalcite (Layered Double is added in original cable outer sheath material (low-smoke halogen-free polyolefin) Hydroxides, abbreviation LDHs) with the composite flame-retardant agent of aluminium hydroxide centainly to match component as composite flame-retardant agent, both improved Mechanical performance, while having achieved the effect that smokeless

The smokeless halogen-free power cable of the present embodiment, conductor structure are stablized, and insulate and use composite structural design, mention The high insulation performance of cable and the security performance of cable；Fireproofing of cable layer metal sheath layer be copper strips welding, effectively every Oxygen ensure that the fire protecting performance of the safety of cable, 10h safe power supply, oversheath can use smokeless under conditions of 1000 DEG C The polyolefine material of halogen-free environmental ensure that cable in case of fire, no pollution to the environment, and (country is existing for Tou Guang Shuai≤90% Have Gao≤80%), good guarantee is provided for fire rescue.

Wherein, the technique used by the power cable of manufacture the utility model embodiment all can be existing technique skill Art.

In conclusion the utility model embodiment uses the environment-protective smoke-free halogen-free polyolefin sheath added with smog inhibitor Material squeeze out oversheath, and by effective use of smog inhibitor, the selection of material, component it is reasonably combined, reached true The effect of positive smokeless halogen-free environmental protection；The power cable of the present embodiment reduces more environment while meeting fire protection requirement Small injury, it is almost pollution-free to ambient enviroment, and good rescue environment, user are provided for effective rescue of fire Just, securely and reliably.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (7)

1. a kind of smokeless halogen-free power cable characterized by comprising multiple conductor elements, insulating layer of conductor, flame retardant inorganic are filled out Fill object, wrapping layer, fireprotection layer protective metal shell and polyolefin oversheath, wherein multiple conductor elements are closely arranged around cable center Column；Each conductor element is twisted by multifilament；Insulating layer of conductor is provided with outside each conductor element；In conductor insulation Cable core outside layer is filled by flame retardant inorganic filler, and is tied up by wrapping layer is wrapped；Fireprotection layer metal is provided with outside wrapping layer Sheath；It is provided with outside the polyolefin for being added to the composite flame-retardant agent of hydrotalcite and aluminium hydroxide and protects outside fireprotection layer protective metal shell Set.

2. cable according to claim 1, which is characterized in that conductor element is twisted by more oxygen-free copper monofilament.

3. cable according to claim 1, which is characterized in that insulating layer of conductor includes: calcining mica tape, and is being calcined The crosslinked polyetylene insulated layer being arranged outside mica tape.

4. cable according to claim 3, which is characterized in that calcining mica tape is using around-packing technology around conductor element Outside；Crosslinked polyetylene insulated layer is extruded in outside calcining mica tape using technique is extruded.

5. cable according to claim 1, which is characterized in that wrapping layer is combined by mica tape and inhibiting tape.

6. cable according to claim 1, which is characterized in that fireprotection layer protective metal shell is welded by copper strips.

7. cable according to claim 6, which is characterized in that fireprotection layer protective metal shell by 99.5% or more copper content copper Welding forms.