CN202563967U

CN202563967U - Novel fireproof shielding armored power cable

Info

Publication number: CN202563967U
Application number: CN201220208277XU
Authority: CN
Inventors: 王世民; 黎民
Original assignee: Chongqing Pigeon Electric Wire and Cable Co Ltd
Current assignee: Chongqing Pigeon Electric Wire and Cable Co Ltd
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2012-11-28
Anticipated expiration: 2022-05-10

Abstract

The utility model discloses a novel fireproof shielding armored power cable. The fireproof shielding armored power cable includes a cable core group, a mineral asbestos cord filling layer, a second glass tape layer, a metal shielding braid, a ceramic silicon gel inner sheath, a steel tape armoring layer, a glass fiber tape layer and a halogen-free low-smoke anti-flaming polyolefin outer sheath together arranged from inside out successively. The cable core group includes two to five cable cores, mica mine tapes, ceramic silicon gel insulating layers and first glass tape layers. The mica mine tapes, the ceramic silicon gel insulating layers and the first glass tape layers wrap all the cable cores respectively. The novel fireproof shielding armored power cable provided by the utility model overcomes a shortcoming of poor fire-resisting performance of a prior power cable, and has characteristics of high fire-resisting temperature, high fire-resisting durability, simple manufacturing technique, and convenient usage and installation.

Description

A kind of novel fire-proof shield armoured power cable

Technical field

The utility model belongs to the power cable field, is specifically related to a kind of novel fire-proof shield armoured power cable.

Background technology

At present, a kind of fireproof cable that generally uses is copper pipe mineral cables, and cable core is that single copper conductor forms single core or multicore; Skin is the copper pipe of using as sheath, makes separator by magnesia between copper conductor and the copper pipe, though simple in structure; Can prevent fires, but need repeated annealing, drawing, labour intensity is big; Not only hardness is very big, and has increased construction cost and time; In addition, what also have to adopt is that magnesia mineral fire-proof insulation and mica tape twine and reach fire-resistant requirement, but owing to the outer jacket of magnesia fire-proof insulation cable has special requirement; Aspect practical application, receive restriction to a certain degree, and the refractory material that mica tape twines, because the restriction of technology; Often be prone to cause overlapping the slot place defective to occur, morning glow master tape embrittlement comes off easily; Also cause fire-resistant weak effect, at present, the fireproof cable that oneself knows; Time that can be fire-resistant does not all surpass 90 minutes, is difficult to the effect that reaches desirable.

The utility model content

The technical problem that the utility model will solve is the shortcoming to existing power cable fire resistance difference, and a kind of novel fire-proof shield armoured power cable that a kind of refractory temperature is high, fire resistance period is long, manufacturing process is simple, easy to install and use is provided.

In order to solve the problems of the technologies described above; The utility model provides following technical scheme: a kind of novel fire-proof shield armoured power cable; Wherein, Include cable core group, mineral stone cotton cord packed layer, the second glass fiber belt, metallic shield braid, potteryization silica gel inner sheath, steel-tape armouring layer, glass belt and halogen-free and low-smoke flame-retardant polyolefin oversheath from the inside to the outside successively; The cable core group includes 2 ~ 5 cable cores, mica mineral band, potteryization silicone insulation layer and the first glass fiber belt, and mica mineral band, potteryization silicone insulation layer, the first glass fiber belt are wrapped in outside the single cable core successively.

Adopt a kind of novel fire-proof shield armoured power cable of the utility model technical scheme; Include cable core group, mineral stone cotton cord packed layer, the second glass fiber belt, metallic shield braid, potteryization silica gel inner sheath, steel-tape armouring layer, glass belt and halogen-free and low-smoke flame-retardant polyolefin oversheath from the inside to the outside successively, the cable core group includes 2 ~ 5 cable cores, mica mineral band, potteryization silicone insulation layer and the first glass fiber belt, and mica mineral band, potteryization silicone insulation layer, the first glass fiber belt are wrapped in outside the single cable core successively; When running into that the part catches fire or during high temperature; The halogen-free and low-smoke flame-retardant polyolefin oversheath can absorb and decompose heat, the reduction system temperature that produces, thereby reaches flame retardant effect, because the smoking set that discharges has the characteristics of low concentration asepsis environment-protecting; Has certain see-through; The personnel that are beneficial to withdraw fast, if when the halogen-free and low-smoke flame-retardant polyolefin oversheath does not have to stop flame, the fusing point of steel is 1515 ℃; Steel-tape armouring layer, glass fibre belt and metallic shield braid can prevent further that flame high temperature from destroying internal material; And mica mineral band, the first glass fiber belt, mineral stone cotton cord packed layer, the second glass fiber belt are the fire protecting performance excellent material and form, and potteryization silicone insulation layer, potteryization silica gel inner sheath have possessed the performance of common silica gel under the normal temperature state, softness; And in the time of 600～1300 ℃, can be cured as hard pottery; Play anti-fire action, so refractory temperature is high, manufacture craft is simple, and easy to install.

Further, a kind of novel fire-proof shield armoured power cable, wherein, described cable core many copper cash bundles strand of serving as reasons forms cable core cross-section area 1.5～400 ㎜ ²The more single copper conductor of cable core of many copper cash bundle strands is soft, helps installing and using.

Further, a kind of novel fire-proof shield armoured power cable, wherein, described mica mineral band is to be suppressed on the glass fiber guipure by mica powder to form.Mica powder has insulating properties, characteristics such as high temperature resistant, and it is suppressed on the glass fiber guipure, is convenient to processing, and intensive even distribution, helps further fire prevention.

Further again, a kind of novel fire-proof shield armoured power cable, wherein, described braid is the network structure that forms with copper wire, tinned copper wire braiding.The fusing point of copper is about 1083.4 ℃, and is hard; The fusing point of tin is about 232 ℃, and is soft, utilizes the both favourable fire prevention of network structure of copper, tinned copper wire braiding, avoids braid to melt, and guaranteed the flexibility of power cable again, avoids influence to install and use.

Adopt a kind of novel fire-proof shield armoured power cable of the utility model technical scheme, when surrounding environment is in just often, cable core, potteryization silicone insulation layer, braid, potteryization silica gel inner sheath, steel-tape armouring layer, glass belt and the halogen-free and low-smoke flame-retardant polyolefin oversheath that the copper cash of bundle strand is formed all guaranteed the flexibility and the pull resistance of cable; When the power cable surrounding environment was caught fire, the halogen-free and low-smoke flame-retardant polyolefin oversheath can absorb and decompose heat, the reduction system temperature that produces, thereby reaches flame retardant effect; Because the smoking set that discharges has the characteristics of low concentration asepsis environment-protecting; Have certain see-through, the personnel that are beneficial to withdraw fast, if when the halogen-free and low-smoke flame-retardant polyolefin oversheath does not have to stop flame; Steel-tape armouring layer and glass belt then play anti-fire action; When the steel-tape armouring layer can not bear high temperature and when being melted, the pottery fire prevention that the curable formation of potteryization silica gel inner sheath is hard, and burnt the crack when perhaps damaging when the pottery of formation; Metallic shield braid, the second glass fiber belt and mineral stone cotton cord packed layer are further prevented fires; The first glass fiber belt, potteryization silicone insulation layer and mica mineral band can finally be protected cable core, avoid cable core to receive the influence of flame high temperature, make and are switched on by the cable core maintenance of copper cash bundle strand; This kind fire prevention armoured power cable can bear 950 ℃ of high temperature; Under the situation that has bump or water to drench, safe power supply is about 3 hours, and refractory temperature is high, fire resistance period is long, manufacturing process is simple, easy to install and use.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model technical scheme is further specified:

Fig. 1 is the section structure sketch map of a kind of novel fire-proof shield armoured power cable embodiment of the utility model.

Embodiment

As shown in Figure 1; A kind of novel fire-proof shield armoured power cable of the utility model; Wherein, Include cable core group, mineral stone cotton cord packed layer 5, the second glass fiber belt 6, metallic shield braid 7, potteryization silica gel inner sheath 8, steel-tape armouring layer 10, glass belt 11 and halogen-free and low-smoke flame-retardant polyolefin oversheath 12 from the inside to the outside successively; The cable core group includes 2 ~ 5 cable cores 1, mica mineral band 2, potteryization silicone insulation layer 3 and the first glass fiber belt 4, and mica mineral band 2, potteryization silicone insulation layer 3, first glass tape are wrapped in outside the single cable core 1 for 4 layers successively; The cable core 1 many copper cash 9 bundle strand of serving as reasons forms cable core 1 cross section 1.5～400 ㎜ ²Mica mineral band 2 is to be suppressed on the glass fiber guipure by mica powder to form.

In the practical implementation process, the cable core group is made up of three cable cores 1, and the area of section of cable core 1 is 10 ㎜ ², certainly, if the cable core group adopts two, four, five cable cores 1 to form, the area of section of cable core 1 is 1.5～400 ㎜ ²In wherein arbitrary data, also within the rights protection scope, when the power cable surrounding environment is caught fire; At first, halogen-free and low-smoke flame-retardant polyolefin oversheath 12 can absorb and decompose heat, the reduction system temperature that produces, thereby reaches flame retardant effect; Because the smoking set that discharges has the low concentration asepsis environment-protecting, has certain see-through, the personnel that are beneficial to withdraw fast; When if halogen-free and low-smoke flame-retardant polyolefin oversheath 12 does not have to stop flame; The fusing point of steel is 1515 ℃, and glass belt 11 plays anti-fire action with 10 on steel-tape armouring layer, when steel-tape armouring layer 10 fails to bear high temperature and when being melted; The pottery fire prevention that the 8 curable formation of potteryization silica gel inner sheath are hard; When the pottery that forms was burnt the crack or damages, metallic shield braid 7, the second glass fiber belt 6 and mineral stone cotton cord packed layer 5 further prevent firess, and the first glass fiber belt 4, potteryization silicone insulation layer 3 and mica mineral band 2 are finally protected cable cores 1; Avoid cable core 1 to receive the influence of flame high temperature, the cable core 1 that makes copper cash 9 bundles be twisted into keeps energising.

For a person skilled in the art; Under the prerequisite that does not break away from the utility model structure; Can also make some distortion and improvement, these also should be regarded as the protection range of the utility model, and these can not influence effect and practical applicability that the utility model is implemented.

Claims

1. novel fire-proof shield armoured power cable; It is characterized in that: include cable core group, mineral stone cotton cord packed layer, the second glass fiber belt, metallic shield braid, potteryization silica gel inner sheath, steel-tape armouring layer, glass belt and halogen-free and low-smoke flame-retardant polyolefin oversheath from the inside to the outside successively; The cable core group includes 2 ~ 5 cable cores, mica mineral band, potteryization silicone insulation layer and the first glass fiber belt, and mica mineral band, potteryization silicone insulation layer, the first glass fiber belt are wrapped in outside the single cable core successively.

2. a kind of novel fire-proof shield armoured power cable as claimed in claim 1 is characterized in that: described cable core many copper cash bundles strand of serving as reasons forms, and the cable core cross-section area is 1.5～400 ㎜ ²

3. a kind of novel fire-proof shield armoured power cable as claimed in claim 1 is characterized in that: described mica mineral band is to be suppressed on the glass fiber guipure by mica powder to form.

4. a kind of novel fire-proof shield armoured power cable as claimed in claim 1 is characterized in that: described metallic shield braid is the network structure that forms with copper wire, tinned copper wire braiding.