CN202615874U

CN202615874U - Movable fireproof cable

Info

Publication number: CN202615874U
Application number: CN 201220009250
Authority: CN
Inventors: 黄诚
Original assignee: Anhui Pacific Cable Group Co Ltd
Current assignee: ANHUI PACIFIC CABLE CO., LTD.
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2012-12-19
Anticipated expiration: 2022-01-11

Abstract

The utility model discloses a movable fireproof cable which comprises a plurality of conductors. The plurality of conductors are wrapped with insulating layers which are formed by a double-faced synthesis mica tape through overlapping and wrapping. Damp-proof membranes which are formed through overlapping and wrapping a high temperature resistance polyester belt are arranged outside the insulating layers. The plurality of conductors, which are wrapped with the damp-proof membranes, are mutually intertwisted so as to form a cable core. The cable core is wrapped with a wrapping layer which is formed by two layers of high-temperature inorganic glass fiber tapes. A filling layer which is formed by an inorganic filling rope is arranged between the cable core and the wrapping layer and on a center of the cable core. The filling layer which is located on the center of the cable core is provided with a through hole. An outer side of the wrapping layer is successively wrapped with an inner sheath layer which is formed by a ceramic flower silicone rubber through extrusion molding, an armor layer formed by an aluminum alloy in a linkage mode and an outer sheath layer which is formed by a low-smoke halogen free elastomer material through the extrusion molding. By using the cable of the utility model, electrical insulation performance and fireproof performance of the cable are increased; and a quality problem that an insulation resistance is reduced because of a moisture absorption characteristic of the inorganic mica tape during a production process of the insulation core or the cable core of the cable is solved.

Description

A kind of movable-type fireproof cable

Technical field

The utility model relates to fireproof cable, relates in particular to a kind of movable-type fireproof cable.

Background technology

Along with developing rapidly of Chinese national economy and improving constantly of living standards of the people, the requirement of quickening city special purpose power grid construction is urgent day by day.The people that make that cause fire incident because of cable press for a kind of special cable that can tackle strong fire damage capability of development.For the higher cable use occasion of fire protection requirement; The level of common in the past organic material fire-resisting cable exists tangible incompatibility, so national correlation department such as the Fire-Fighting Bureau under the Ministry of Public Security and other enterprises and institutions put on planning to the high performance fire-resisting cable of development for a long time.

Over nearly 20 years, people have carried out research extensively and profoundly to the fire-retardant and fire resistance of organic insulation or sheath material electric wire, and the fire-retardant and fire-resisting cable product of many superior performances is succeeded in developing in succession.Regrettably, these organic materials more or less still can discharge pernicious gas and produce thick smoke in combustion process, and are difficult to guarantee that some important electric wirings carry out work normally in fire process.In the last few years; Research for the inorganic fire cable obtains significant progress; Inorganic insulation fire resistant cable is the very good safety-type cable of performance; Its fire prevention, explosion-proof, high temperature resistant, aging, initiation fire or propagate kindling material not; And the characteristic of not burning, can not discharge any pernicious gas and smog around under the ignition condition, be specially adapted to that environment is abominable, the extra high place of security requirement or position, especially be applicable to the fire-fighting system circuit that under fire, will guarantee safe power supply.

Exploitation for the inorganic fire cable at present mainly contains two kinds of forms, and a kind of is the fireproof cable of magnesia mineral insulation, and a kind of is the fireproof cable that insulate with inorganic mica tape; Although the former excellent product performance; But because complex process, equipment investment are high, cable cost is high, be difficult in market, extensively promote, the latter has high temperature resistant fire-resistant and mica tape with insulation property as insulating material for adopting multilayer; Replace the magnesia insulating material, play the good insulation electric property equally.Product is because of having the higher metallic sheath of fire resistance; Can guarantee when possessing magnesia mineral insulated cable characteristic; Can also have preferably flexiblely, be particularly suitable for moving the demand in the place that the fire resistance of occasion has relatively high expectations, this kind cable manufacturing process is simple relatively simultaneously; Equipment investment cost and cable production cost are relatively low, have good market prospects.

Based on analyses such as above performance of products, market prospects, the utility model designs with a kind of mobility fireproof cable, can address the above problem effectively.

The utility model content

In order to remedy the deficiency of prior art, the purpose of the utility model provides a kind of movable-type fireproof cable, and reasonable in design has improved fireproofing of cable, fire-resistant, moisture barrier properties comprises greatly, has improved the structural strength of cable.

The technical scheme of the utility model is following:

The movable-type fireproof cable; Comprise several conductors, it is characterized in that: described several conductors are enclosed with the overlapping wrapped formation insulating barrier of two-sided synthetic mica tape outward respectively, and wrapped Duplication is not less than 45%; Insulating barrier adopts the overlapping wrapped formation damp-proof layer of high temperature resistance polyester band outward; Wrapped Duplication scope 20%～36%, the mutual stranded formation cable core of several conductors of parcel damp-proof layer, cable core is surrounded with the lapping layer that two floor height temperature inorganic glass fiber bands constitute outward; Duplication scope 20%～36%; Between cable core and the lapping layer, the cable core center all is furnished with the packed layer that inorganic gasket for packing constitutes, the packed layer that is positioned at the cable core center has through hole, the chain formation armour of inner restrictive coating, aluminum alloy strip, low smoke and zero halogen elastomeric material extrusion moulding that the lapping layer outside is enclosed with pottery flower silicon rubber extrusion moulding successively are external sheath layer.

Described movable-type fireproof cable; It is characterized in that: described several conductors adopt the stranded copper wire conductor of stipulating among the GB/T2953-2008 of multiply (5 types); The stranded copper wire conductor is general adopt in the same way once bundle to close structure or with Shu Hehou as strand, carry out the compound lay configuration of secondary in the same way then.

The beneficial effect of the utility model:

1, adopts the insulating barrier of inorganic synthetic mica tape and resistant to elevated temperatures polyester belt combination; Outside cable core, squeeze simultaneously=wrap in one deck potteryization fire-resistant silicon rubber and protect; When improving the electrical insulation properties of cable, insulated wire cores or the cable core that has solved cable is in process of production owing to change under the situation such as preface time length, humid environment, storage the quality problems that cause the insulation resistance reduction because of the inorganic mica tape moisture absorption.

2, protect new structure with the combination of the chain armouring sheath of aluminium alloy in the potteryization fire-resistant silicon rubber; Fireproofing of cable, grease proofing, anticorrosion, moistureproof fail safe had both been realized; The shielding properties that has good overcurrent proof magnetic disturbance simultaneously, this has in the place of electromagnetic shielding requirement used cable advantage particularly evident again for existing fire prevention conditional request.

3, because cable has adopted inorganic insulation, all-in-one-piece chain metallic sheath structure; Cable does not burn, does not prolong combustion, explosion-proof under the fire condition; Do not produce poisonous, harmful flue gas; Within a certain period of time can operate as normal, be specially adapted to that environment is abominable, the extra high place of security requirement or position, especially be applicable to the fire-fighting system circuit that under fire, will guarantee safe power supply or control system.

Description of drawings

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

Embodiment

The movable-type fireproof cable; Comprise several conductors 1, be enclosed with the overlapping wrapped formation insulating barrier 2 of two-sided synthetic mica tape respectively outside several conductors 1, wrapped Duplication is not less than 45%; The insulating barrier 2 outer overlapping wrapped formation damp-proof layers 3 of high temperature resistance polyester band that adopt; Wrapped Duplication scope 20%～36%, several conductors 1 mutual stranded formation cable core of parcel damp-proof layer 3, cable core is surrounded with the lapping layer 4 that two floor height temperature inorganic glass fiber bands constitute outward; Duplication scope 20%～36%; Between cable core and the lapping layer, the cable core center all is furnished with the packed layer 5 that inorganic gasket for packing constitutes, the packed layer 5 that is positioned at the cable core center has through hole 6, lapping layer 4 outsides are enclosed with the chain formation armour of inner restrictive coating 7, the aluminum alloy strip of pottery flower silicon rubber extrusion moulding 8 successively, low smoke and zero halogen elastomeric material extrusion moulding is an external sheath layer 9.

Several conductors 1 adopt the stranded copper wire conductor of stipulating among the GB/T2953-2008 of multiply (5 types), the stranded copper wire conductor is general adopt in the same way once bundle to close structure or with Shu Hehou as strand, carry out the compound lay configuration of secondary in the same way then.

The structural design of concrete each layer:

1, several conductors: adopt multiply (5 types) stranded conductor of stipulating among the GB/T2953-2008, the multiply conductor is general adopt in the same way once bundle to close structure or with the conductor of Shu Hehou as strand, carry out the compound lay configuration of secondary in the same way then.

2, insulating barrier: two-sided synthetic mica tape is adopted in insulation, and wrapped on conductor, its wrapped number of plies is no less than three layers, and Duplication is controlled at more than 45%, and the insulated wire cores after wrapped should be through the spark test of 10kV.

3, damp-proof layer: adopt high temperature resistance polyester band or similar material, wrapped Duplication is controlled at about 20%～36% outside the mica tape insulation, and the insulation resistance of wrapped back core should be not less than 500 Ω km.

4, stranding: the core after will insulating carries out stranding, and fills inorganic high-temp gasket for packing (like the inorganic glass fiber rope etc.) cable core is filled rounding, its outer wrapped two floor height temperature inorganic glass fiber bands, and Duplication is controlled at about 20%～36%.

5, inner restrictive coating: the cable core behind the stranding extrudes one deck potteryization fire-resistant silicon rubber outward as its sheath.

6, the chain armouring sheath of aluminium alloy: cable adopts the chain armouring technology of aluminum alloy strip, forms the sheathed structure of locking continuously.

7, external sheath layer: to metal (copper) sheath be corrosive can the place; Cable can be according to the requirement of use occasion; Outside cable metal sheath, increase one deck low smoke and zero halogen elastomeric material, but be used for protecting metallic sheath in its environment for use mechanical damage that is not corroded.

Claims

1. movable-type fireproof cable; Comprise several conductors, it is characterized in that: described several conductors are enclosed with the overlapping wrapped formation insulating barrier of two-sided synthetic mica tape outward respectively, and wrapped Duplication is not less than 45%; Insulating barrier adopts the overlapping wrapped formation damp-proof layer of high temperature resistance polyester band outward; Wrapped Duplication scope 20%～36%, the mutual stranded formation cable core of several conductors of parcel damp-proof layer, cable core is surrounded with the lapping layer that two floor height temperature inorganic glass fiber bands constitute outward; Duplication scope 20%～36%; Between cable core and the lapping layer, the cable core center all is furnished with the packed layer that inorganic gasket for packing constitutes, the packed layer that is positioned at the cable core center has through hole, the chain formation armour of inner restrictive coating, aluminum alloy strip, low smoke and zero halogen elastomeric material extrusion moulding that the lapping layer outside is enclosed with pottery flower silicon rubber extrusion moulding successively are external sheath layer.

2. movable-type fireproof cable according to claim 1; It is characterized in that: described several conductors adopt the strands copper wire conductor of stipulating among the GB/T2953-2008; The stranded copper wire conductor is general adopt in the same way once bundle to close structure or with Shu Hehou as strand, carry out the compound lay configuration of secondary in the same way then.