METHOD OF DAMPING OVERHEAD CRANE EFFECTS AND UNLOADING REINFORCED-CONCRETE SUPPORT OF COLUMN DISINTEGRATING FROM CONCRETE REINFORCEMENT CORROSION Russian patent published in 2012 - IPC B66C7/00 

FIELD: transport.

SUBSTANCE: invention relates to mechanical engineering. Support reaction of two adjacent crane girders is transferred between two supports and column top part onto column bottom part nearby its center of gravity with minimum eccentricity. For this support tubular damper is mounted to extend from support top edges and locked therein. Inclined tension bars are used to suspend lower damper to upper one and lock it by jack bolts. Two thrust struts are mounted on lower damper and jointed there by their lower flanges. Upper flanges are jointed to two adjacent crane girders from below. Screwdrivers are use to tighten nuts on adjusting pair of inclined tension bars to draw thrust and lower dampers together so that designed position is resumed in vertical. Gap between thrust ribs of crane girders and column support is created. Channel length with holes in flanges is mounted on rail mark to make channel flanges directed upward. One edge of said channel rests on top girths of adjacent crane girders while another edge fits tightly with column top. Channel flange is rigidly secured to column external stop by two licking tension bars while rail head is studded to channel flange, closest to the rail. Rail is mounted on crane girder coaxially by rotating adjusting nuts on studs to make designed distance between rail axis and column inner facet. Nuts are locked to allow operation of spring-loaded crane structures.

EFFECT: complete damping and unloading.

3 dwg