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一、问题的提起滑车在吊装施工中用途极广,在使用起重桅杆吊装时尤为重要。我国起重滑车已经在中小吨位部分系列化,即 JB1204—71的通用起重滑车系列,滑车最大吨位(吊重量)140吨,轮数最多为八轮。由于炼油化工装置的大型化,高、重、大的工艺设备越来越多,在施工中采用大重量的整体综合吊装,对一些塔器来说是经济合理的,特定条件下是不能避免的(如整体到货的大重量设备)。就我国目前施工水平而言,应备置一定数量的大型起重桅杆,并配套超出 JB1204—71系列的大型起重滑车来适
First, the problem raised Tilting in the lifting of a very wide range of uses, lifting crane mast is particularly important. China’s lifting tackle has been part of the series of small and medium-tonnage, JB1204-71 common lifting tackle series, the largest tonnage pulley (hanging weight) 140 tons, the maximum number of rounds of eight. Due to the large scale of refinery and petrochemical plant, more and more high, heavy and large process equipment, the use of large integrated weight hoisting in construction is economically reasonable for some towers and can not be avoided under certain conditions (Such as the overall arrival of the heavy equipment). In terms of the current construction level in our country, a large number of large lifting masts should be prepared and equipped with large lifting tackles which exceed JB1204-71 series