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随着国民经济的发展,我国冶金工业发展很快,矿山挖掘设备大量增加。这些设备配用的电缆大多数为6kV高压橡套电缆,它们在露天的恶劣环境中运行,长期经受拖、挤、压、砸以及风吹、雨淋、日晒和严寒的考验,加速了电缆的老化和破损。过去,当电缆破损时后,一般采用绝缘胶带包扎法修补。但是,由于绝缘胶带的机械强度低,粘合性能差,绝缘性能有限,包扎后重复破损时有发生,尤其是开裂后,造成芯线裸露或浸入水份而短路,发生爆炸放炮事故。从而使电源开关烧毁,供电线路开关掉闸,不仅直接影响矿石正常生产,而且可能发生人身伤亡事故。
With the development of the national economy, China’s metallurgical industry has developed rapidly, and a large number of mining equipment have been added. Most of the cables used in these devices are 6kV high-voltage rubber sheathed cables that operate in harsh open-air environments and have long been subjected to drag, squeeze, pressure, drop, and wind, rain, sun and cold, accelerating the cables Aging and damage. In the past, when the cable was damaged, the general use of insulating tape bandage repair. However, due to the low mechanical strength of the insulating tape, the adhesive properties are poor, the insulating properties are limited, repeated damage occurs after dressing occurs, especially after cracking, causing the bare core or immersed in water and short circuit, the explosion occurred blasting accident. So that the power switch burned off the power line switch off, not only directly affect the normal production of ore, and may result in personal injury.