桂潮电缆新闻：矿用电缆技术发展趋势 cable news: development trend of mining cable technology-非凡电子娱乐

cable in the past 20 years of practice,

experienced from non flame retardant to flame retardant innovation,

in particular, the test methods and rules of flame retardant cable for coal mine (mt 386-1995),

since the promulgation and implementation of mt386-2011,

the flame retardant performance of the coal mine cable is effectively controlled and improved.

however, the existing flame retardant cables used in coal mines (mostly used as chlorine containing polymers as a sheath material) once heated combustion,

the amount of smoke released by its combustion is very large.

although the transmittance of iec 61034 or gb / t 17651--1998 is below 10%,

however, the release of hydrogen chloride (hcl) gas content is very large, its content is more than 100 mg / g,

even reach 200 ~ 300mg / g.

such a dense smog coupled with h2s and co and other toxic gases on the human respiratory system stimulation and toxicity,

in the narrow underground environment, the affected people simply can not escape the fire scene.

according to the white paper,

this two disaster casualties in the total number of casualties in the fire of 70% ~ 80%.

in the number of casualties in coal mine fire accidents in china, the number of people who suffer from "two disasters" is also very large.

flame retardant or non flame retardant materials such as cables will release a lot of smoke and co, hc1 and other gases,

in order to avoid or reduce the two disaster",

international electrotechnical commission (iec) in 1982 and in 1989 successively developed and revised the iec60754-1 and iec60754-2,

in order to limit the amount of poisonous gas released by the combustion of the cable (hc1 content of <5 mg / g),

ph>4.3 and electrical conductivity of aqueous solutions of corrosive gases released by combustion <10 tts / ram.

in 1991, the iec61034 was also developed to limit the amount of smoke released by the cable when it was fired (with a >60%).

the united kingdom has developed a naval engineering standard nes 718 and nes a, 713.

the united states navy standard mils24643 directly uses the nes 713 standard to detect the toxic gas content (<5) when the cable is burning.

all of these standards provide an effective and reliable basis for limiting the release of smoke and toxic gases from flame retardant or non flame retardant materials such as cables,

however, in the coal mine in this high-risk industry, china's coal mine cable in the low smoke low toxicity (halogen) control is almost blank.

the environmental pollution of low smoke and low halogen flame retardant cable used in coal mine is smaller than that of flame retardant cable used in coal mine,

that is, low smoke and low halogen flame retardant cable for coal mine to reduce or reduce the two disasters caused by the burning of cables";

at the same time, the performance can meet the requirements of cable materials for coal mine.

it is necessary and important to develop and apply the low smoke and low toxicity (halogen) flame retardant cable for coal mine.