| 摘要 |
FIELD: mining.SUBSTANCE: pipe from fabric reinforced with polyvinylchloride for suspension under a tunnel ceiling or similar, comprises an inner and an outer cover from polyvinylchloride. At the same time the inner cover is made from black electroconducting polyvinylchloride, and the outer cover - from white electric insulating polyvinylchloride. Besides, the pipe is equipped with an external longitudinal strip from black electroconducting polyvinylchloride, which is in contact with the inner cover. Besides, the specified strip is grounded with the help of the suspended system from the pipe to the mine ceiling.EFFECT: elimination of dangerous sparking in underground conditions.5 cl, 1 dwg |
