Patent ID: 9242836
Filing Date: 2016-01-26
CPC Classification: B21F,B66B,E21D

Claim Text:
1. A device that automatically adjusts a tension of a steel rope comprising a guide system along which a mining elevator car moves vertically, device comprising a wellhead automatic tightening device and a bottom hole fixing device connected respectively to two ends of a steel rope, the wellhead automatic tightening device being connected to a hydraulic system and a tension detection system; the wellhead automatic tightening device comprising a lower fixer seat installed on an upper carrier bar, tightening oil cylinder blocks disposed on left and right sides of an anti-fall rope clamp, anti-fall seats to either side of the tightening oil cylinder blocks, plungers inside tightening oil cylinder blocks connected to hinge pin seats fixed to a bottom of a hinge pin fixing seat via hinge pins, an anti-fall rope clamp preventing fall of the steel rope disposed under the hinge pin fixing seat, a tightening fixing rope clamp disposed on the hinge pin fixing seat, an upper fixer seat for fixing left and right guide posts disposed on the support frame, a rope adjusting guiding clamp disposed on the upper fixer seat, guide slots movable vertically along the guide posts disposed on two sides of the hinge pin fixing seat; and the bottom hole fixing device comprises a fixing plate on the lower carrier bar, wherein on the fixing plate a fixing rope clamp is fixed on the lower end of the steel rope.