CN2121064U

CN2121064U - High-temp. cable

Info

Publication number: CN2121064U
Application number: CN 92223066
Authority: CN
Inventors: 赵同舟
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-01
Filing date: 1992-06-01
Publication date: 1992-11-04

Abstract

The utility model relates to a high-temperature cable. Three copper conductors coated with a mica layer are arranged at the center of the cable of the utility model. The outer part of a trifluoroethene layer provided with the cladding of the mica layer is coated with a glass fiber braiding nonflammable paint coating layer. The cable can resist high temperature and has good insulation property. The cable can not combust. The cable can be manufactured by the process and the equipment of a common cable factory.

Description

High-temp. cable

The utility model relates to field of cables, particularly high-temperature cable.

Present used cable temperature tolerance is poor, and cable is the highest anti-only 80 ℃, therefore, easy breaking out of fire when overload operation or short circuit, also burning easily of this cable simultaneously, it is very fast to prolong combustion speed.According to the information that fire-fighting quipment provided, have 60% owing to electric wire in the annual fire that is taken place, cable is bad causes, causes tremendous loss to the country and people.At present, Shang Weijian has preferably that high-temperature cable appears on the market.

The purpose of this utility model provides a kind of not only the insulation but also resistant to elevated temperatures cable.

The purpose of this utility model reaches like this: be surrounded by outside every copper conductor of three copper conductors of central authorities as the mica layer that does not fire insulating barrier, its thickness is 0.4～0.5 millimeter, outside the copper conductor that three tripartite confrontations that have the mica covering are close to, be surrounded by polytetrafluoroethylene floor as the high-temperature material lapping layer, outside this polytetrafluoroethylene floor, be surrounded by glass fiber weaving non-flammable paint coating again, thereby the purpose of this utility model has just reached fully.

Below in conjunction with accompanying drawing the utility model is elaborated.

Accompanying drawing 1 is this new type high temperature cross-section of cable schematic diagram.

Among the figure: 1 represents copper conductor, and 2 represent mica layer, and 3 represent polytetrafluoroethylene floor, and 4 represent glass fiber weaving non-flammable paint coating.

Present used all size cable, no matter also be power cable, communication cable, or mining cable, its structure from inside to outside is substantially: conductor, insulating barrier and sheath.Frequent in the coal mining mining industry owing to cable short circuit, overload operation and various external cause cause fire, the most serious is often the drive flowstone to take place and collapse in the mine, make the cable subject to damage, the colliery is as gas occurring, then touch burning things which may cause a fire disaster and will produce blast, cable commonly used is inflammable explosive again, must be improved.For this reason, through development for many years, succeed in developing mining high-temperature cable finally.

The sectional view of the utility model high-temperature cable is seen accompanying drawing 1, can see clearly from this figure: outside every copper conductor of three copper conductors 1 of central authorities, be surrounded by as the mica layer 2 that does not fire insulating barrier, its thickness is 0.4～0.5 millimeter, outside the copper conductor 1 that three tripartite confrontations that have mica layer 2 coverings are close to, be surrounded by polytetrafluoroethylene floor 3 as the high-temperature material lapping layer, outside this polytetrafluoroethylene floor, be surrounded by glass braid non-flammable paint coating 4 again as sheath, this cable was both high temperature resistant, fire-retardant, again good insulating.

The mica layer that coats on copper conductor 1 is used as insulating and not firing layer material.Mica has high resistance, can be not breakdown 5000 volts of high pressure, not burn for 1000 ℃ at high temperature, and long-time the use worn out.Therefore, mica is insulation and resistant to elevated temperatures ideal material, and the mica bed thickness can satisfy the requirement that cable is high temperature resistant and insulate for 0.4～0.5 millimeter.The copper conductor outside that is close in three tripartite confrontations that are surrounded by this mica layer 2 is surrounded by polytetrafluoroethylene floor 3 with canoe, this polytetrafluoroethylene is heat-resisting thermoplastic polymer, can use below 327 ℃, and do not burn, its anti-electrical property, resistance to corrosive chemicals and weatherability are all better, nontoxic, in this cable, mainly utilize the characteristic of above polytetrafluoroethylene.Outside this polytetrafluoroethylene lapping layer 3, also be surrounded by glass braid non-flammable paint coating 4 as sheath, this sheath is to be coated with on the glass braid thing with non-flammable paint again, this one deck itself is a composite material, its intensity is big, in light weight, anticorrosive, this non-flammable paint is to add fire retardant to make in silicon lacquer, its resistance combustion temperature can reach 850 ℃, further strengthens the resistance to elevated temperatures of cable.

The utility model high-temperature cable does not change by national electric wire specification dimensionally, processing technology and equipment with general electric wire factory can be produced, and can satisfy new type high temperature cable technology and performance requirement, this product detects in national electric wire quality supervision and test test center.Passed through the standard by IEC331 in fire-resistance property test, this test is 750 ℃ of burnings 3 hours, and during this period and during the withstand voltage test after 12 hours, fuse is continuous when high pressure 1000V, 3A; Carrying out bunched burning test (category-A) according to the IEC332-3 standard, scaling loss length is 0.56 meter, and the scaling loss length of test requirements document is less than 2.5 meters.This new type high temperature cable is high temperature resistant, and good insulating is the high-temperature cable renewal product, and economic benefit and social benefit are bigger, extensive market.

Claims

1, high-temperature cable, form by conductor, insulating barrier and sheath, it is characterized in that: outside every copper conductor of three copper conductors of central authorities, be surrounded by as the mica layer that does not fire insulating barrier, its thickness is 0.4～0.5 millimeter, outside the copper conductor that three tripartite confrontations that have the mica layer covering are close to, be surrounded by polytetrafluoroethylene floor, outside this polytetrafluoroethylene floor, be surrounded by glass braid non-flammable paint coating again as sheath as the high-temperature material lapping layer.