The
pulley principle lifting rod comprises a first-stage
pipe joint, a middle
pipe joint, a last-stage
pipe joint and a steel
wire rope, the last-stage pipe joint is arranged in the middle pipe joint, a middle
pulley mounting seat is arranged at one end of the bottom of the middle pipe joint, and middle inner pulleys are arranged on the two sides of the bottom of the middle
pulley mounting seat; the steel
wire rope is controlled to be wound and unwound, the lifting rod is controlled to ascend and descend, the structure is simple and compact, carbon
fiber materials of the pipe joints are matched, the steel
wire rope is controlled to be wound and unwound, the steel wire
rope is controlled to be wound and unwound, the lifting rod is controlled to ascend and descend, and the steel wire
rope and the steel wire
rope are controlled to be wound and unwound. The
self weight of the lifting rod is greatly reduced, more middle pipe joints can be installed, the lifting height of the lifting rod has a wider application range, meanwhile, through cooperation of the steel wire rope and the pulley block, section-by-section lifting is achieved when the lifting rod ascends and descends, and the lifting process is more stable and reliable.