CN202711799U

CN202711799U - Mineral insulation fireproof cable having corrugated stainless steel sheath

Info

Publication number: CN202711799U
Application number: CN 201220380637
Authority: CN
Inventors: 宋建国
Original assignee: Henan Huatai Special Cable Co Ltd
Current assignee: Beijing Huchenghe Fireproof Cable Co., Ltd.
Priority date: 2012-08-02
Filing date: 2012-08-02
Publication date: 2013-01-30
Anticipated expiration: 2022-08-02

Abstract

The utility model discloses a mineral insulation fireproof cable having a corrugated stainless steel sheath. The cable comprises conductors, insulation layers, a fireproof thermal insulation layer, a wrapping layer, a sheath layer and a fireproof paint layer. The cable is characterized in that, the insulation layers are tightly bonded to the conductors, the fireproof thermal insulation layer is arranged between the insulation layers and the wrapping layer, the sheath layer is closely coated outside the wrapping layer, and the fireproof paint layer is formed by spraying. The cable is simple in production technology and has the advantages of fireproof, waterproof, high temperature resistance, corrosion resistance and strong mechanical property.

Description

Ripple stainless steel sheath mineral insulated cable

Technical field

The utility model belongs to the special cable technical field, specifically a kind of ripple stainless steel sheath mineral insulation fireproof cable.

Background technology

Electrical Safety is global problem, when fire incident occurs, how to leave sufficient time guarantee people safe escape especially, reduces causality loss; The energising of guarantee line security, signal is unimpeded, plays vital effect; How improving in addition the fire safety grades such as key project, important place, special dimension, is the diligent pursuit of cable industry people.

Producing at present the fireproof cable structure both at home and abroad mainly contains: the one, to invent in the MI of the nineties in last century type mineral insulated cable (being the fire-resistant copper pipe wiring of BTT), and another kind is that the wrapped insulating polymeric material of fireproof mica coats fire-resisting cable (NH type); Another is fire prevention aluminum pipe separation sleeve type (NG type) fireproof cable.The cable Main Problems of these structures has: MI type mineral insulated cable adopts copper sheath, at first is that copper consumption increases, and production cost increases; Moreover adopting the drawing copper tubes technical matters complicated, equipment investment is high; Be difficult in addition realize that the big-length section produces, and hard especially, laying installation, joint are all cumbersome etc.; Though NH type fire-resisting cable technique is simple, cost is lower, and the security reliability under 750 ℃ of-800 ℃ of flames is stable not as good as MI type cable, and the puncture rate is very high, can not be used for the place that safety can be had relatively high expectations; NG type fireproof cable is owing to adopting the aluminium cover, and the fusing point of aluminium only has 660 ℃, so refractory temperature can not be too high, and suppleness is relatively poor, installs inconvenient.

The problem that exists in order to solve present all kinds of fireproof＝fire-proof cable, improve the fail safe of product, usability, can make the fire safety grade of product reach the standard of MI type cable, the production of the similar common cable of its production technology is badly in need of a kind of production technology of research and development simple, the random length section is produced, multi-size, and have the good pliability of high strength, the cable of the characteristics such as mounting and installation convenience.

The utility model content

The technical problem that the utility model solves provides that a kind of production technology is simple, fire prevention, waterproof, a kind of ripple stainless steel sheath mineral insulation fireproof cable that high temperature resistant, corrosion-resistant, mechanical performance is strong.

The utility model is achieved through the following technical solutions: a kind of ripple stainless steel sheath mineral insulation fireproof cable, comprise conductor, insulating barrier, fire proof heat-insulation layer, lapping layer, restrictive coating and fireproof paint layer, be primarily characterized in that: insulating barrier and conductor are combined closely, and have additional fire proof heat-insulation layer between the lapping layer, restrictive coating wraps tightly outside lapping layer, the sprayed fire proofing dope layer.

Described conductor is circular copper stranded conductor.

Described insulating barrier is that synthetic mineral insulating tape and high temperature resistance glass fiber band are composited.

Described fire proof heat-insulation layer adopts the inorganic mineral putty to fill and forms.

Described restrictive coating adopts the ripple stainless steel to be made.

Utilize the fireproof cable of this product structure and manufacturing process production to have following feature:

1. refractory standard can be passed through three examinations of BS6387:1994 " cable keeps the performance requirement of integrality under flame condition ", is fireproof cable truly, that is: 1) and BS6387:1994 appendix D ₂The simple fire resistance test of standard (C class): apply under the rated voltage for 950 ℃ of .180min flame combustion samples of fire, but 3A fusing device does not fuse; 2) BS6387:1994 appendix D ₃The water spray fire resistance test of standard (W class): for 650 ℃ of fire. add water spray 15min flame combustion sample and apply under the rated voltage, the 3A fuse does not fuse; 3) BS6387:1994 appendix D ₄The band of standard impacts fire resistance test (Z class): for 950 ℃ of fire. and apply mechanical shock and applied under the rated voltage by fiery 15min flame combustion sample, the 3A fuse does not fuse;

2. this product 1.5～6mm ²Can produce 37 cores, 10～240mm ²Can produce 1～5 core, 300～630mm ²But the manufacture order core, length can be according to whole non junction delivery of client's needs.

3. poling separately when laying directly lays, and has good fire prevention, waterproof, protecting against shock function.

4. have protection against rodents, anti-ant, radiation proof function, can guarantee that cable has stability, life-span length and durability.

5. to have a temperature resistant grade high for cable, and the amount of damming is large, and anti-overload ability is strong, and is safe, especially applicable in the project of environmental requirement.

6. corrosion resistance: this mineral insulated cable is because its special structure has antisepsis to the general chemical substances such as soda acid.

7. mechanical strength is high, and stainless steel has good mechanical and physical performance, even the distortion that cable occurs to a certain degree still can work, also can not damage its electrical property even be subject to violent mechanical damage.

Description of drawings

Fig. 1 is the utility model structural representation.

Among the figure 1, conductor, 2, insulating barrier, 3, fire proof heat-insulation layer, 4, lapping layer, 5, restrictive coating, 6, the fireproof paint layer.

Embodiment

A kind of ripple stainless steel sheath mineral insulation fireproof cable; comprise conductor 1; insulating barrier 2; fire proof heat-insulation layer 3; lapping layer 4; restrictive coating 5 and fireproof paint layer 6; insulating barrier 2 is combined closely with conductor 1; adopt synthetic mineral insulating tape and the wrapped formation lapping layer 4 of high temperature resistance glass fiber band composite high speed; restrictive coating 5 adopts the ripple stainless steel to make; the weld temperature is more than 2000 ℃ in the course of processing; insulation is easy to burn; adopt the inorganic mineral putty to fill and form fire proof heat-insulation layer 3; protection insulating barrier 2 is not burnt; play again fireproofing function, ripple stainless steel sheath layer 5 wraps tightly outside lapping layer 4, sprayed fire proofing dope layer 6.

Claims

1. ripple stainless steel sheath mineral insulation fireproof cable, comprise conductor, insulating barrier, fire proof heat-insulation layer, lapping layer, restrictive coating and fireproof paint layer, be primarily characterized in that: insulating barrier and conductor are combined closely, and have additional fire proof heat-insulation layer between the lapping layer, restrictive coating wraps tightly outside lapping layer, the sprayed fire proofing dope layer.

2. wrinkle stainless steel sheath mineral insulated cable according to claim 1, it is characterized in that: described conductor is circular copper stranded conductor.

3. wrinkle stainless steel sheath mineral insulated cable according to claim 1, it is characterized in that: described insulating barrier is that synthetic mineral insulating tape and high temperature resistance glass fiber band are composited.

4. wrinkle stainless steel sheath mineral insulated cable according to claim 1 is characterized in that: described fire proof heat-insulation layer employing inorganic mineral putty filling formation.

5. wrinkle stainless steel sheath mineral insulated cable according to claim 1 is characterized in that: described restrictive coating adopts the ripple stainless steel to be made.