LIFTING DEVICE Russian patent published in 2019 - IPC B66B9/00 

FIELD: machine building.

SUBSTANCE: invention relates to lifting-and-conveying machine building and concerns design of hoisting devices temporarily placed inside vertically serviced object. Lifting device comprises frame (11), platform mounted to move from upper position to lower position inside serviced object. Platform is made of bent tubes with support surface intended for arrangement of working and equipment. Cable-block drive is equipped with winch (10), a pair of double polyspasts (13) and (14), which blocks are installed on horizontal axes, limit switches of the platform lower and upper positions. Rope (8), (9) of each tackle block is stored through one pair of tackle blocks. Ends of ropes (8), (9) of tackle blocks (13), (14) are fixed with counterweight (7) with swivel, which is connected to platform (1). Each tackle (13), (14) is equipped with load (15) with possibility of ropes (8), (9) tensioning accordingly. Centrifugal catcher (12) is fixed on the frame, at that, rope (9) of one of tackle block (14), which is a safety line, is passed through the catcher, to prevent the site falling when another rope-tackle (13) other rope (8) is connected to winch (10).

EFFECT: invention provides access to the entire surface of the object in cramped conditions by using a platform having small overall dimensions.

4 cl, 3 dwg