FIELD: mining.
SUBSTANCE: derrick-winch pulley of drilling unit includes drilling platform with derrick installed on derrick support of drilling unit, drilling platform lifting system including supports one end of which is hinged to derrick support, and the other end is hinged to drilling platform; at that, supports are fixed in vertical position by means of at least one diagonal brace one end of which is hinged to drilling platform, and the other end is equipped with a grip moving along derrick support when drilling platform is being lifted and provided with possibility of fixing the position of diagonal brace when drilling platform is being lifted by means of a ratchet; main and auxiliary hydraulic lifting cylinders installed on derrick support and performing the lifting of drilling platform, improving ease of erection of equipment on drilling platform.
EFFECT: improving safety of erection works on drilling platform, reducing the time and costs for erection of drilling platform.
7 cl, 3 dwg
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