新型桥式起重机在乌江渡发电厂扩建工程地下厂房的应用

Application of New-type Bridge Type Hoist in Underground Powerhouse of Wujiangdu Power Plant's Extension Project

QQ3200kN+3200kN/800kN型双小车电动双梁桥式起重机(以下简称QQ型桥机),于2002年3月在乌江渡发电厂扩建工程地下厂房投入运行。QQ型桥机采用可编程控制器(PLC)的控制方式和变频调速的调速方式,使整机具有良好的调速性能和操作性,并采取了如偏轨箱形梁、无小车架新型小车等多种技术措施以减轻整机自重,适合水电站机组大物件的精确吊装就位,提高了水电厂起重设备的稳定性和安全性。

QQ32000kN+3200kN/800kN electronic pairs of car & pairs of beam bridge-type hoist(hereafter referred to as the Model QQ bridge hoist)was put into operation in the underground powerhouse of Wujiangdu power plant's extension project in March 2002.Model QQ bridge hoist adopts the control method of programmable controller(PLC)and the adjusting speed way of conversion frequency,and make the whole machine have good performances of adjusting speed and operating,and takes many kinds of technological measures in order to reduce weight of whole hoist such as adopting lean-rail case shape beam,using new-type car without car frame,etc.This kind of hoist is suited for accurately hoisting large part of unit and taking its place in hydropower station,and improving stability and security of overweight equipment in hydropower plant.