MINE VENTING PLANT Russian patent published in 1996 - IPC

FIELD: mining. SUBSTANCE: plant includes operating and standby fans installed in jackets. Each jacket has diffuser, header, electric motor, main and additional gates placed so as to overlap inlet and outlet openings of the jacket, and sealing belts provided with drives of axial travel. The plant is provided with support ring placed at upper opening of the jacket and flexible links with pull members and surrounding rolls covering the jacket of each fan in planes being parallel to its axis. Two opposite sections of each link are placed at the level of inlet and outlet jacket outlets. The main and additional gates are flexible and opposite to each other by flexible links. Flexible links may be made in the form of chains and, at least, one surrounding roller is provided with chain sprocket. Besides the plant may be provided with additional support ring placed ar lower openings of fan jacket, and guide members in the form of aprons secured to the support rings. Diameters of the support rings exceed diameters of the sealing belts. EFFECT: higher efficiency. 5 cl, 5 dwg