一.概况国内炼油厂除少数大型装油站台使用集中装油大鹤管外,大多数炼油厂和各油库装卸油站台使用的 Dg100毫米以下的小鹤管有上千台,结构型式有十多种,使用中都存在一定缺点,总的看来水平不很高,有待改进。其中使用的万向鹤管大部分是64年设计的产品,其结构示意图见图1。由于它具有重量轻、转动灵活、造价不高、使用范围广、好维护等特点,很适合 I. Overview Domestic refineries except for a few large oil loading stations using centralized loading large crane pipe, most of the refineries and depots loading and unloading stations Dg100 mm below the small crane pipe has thousands, the structure of a dozen There are some shortcomings in the use of species, the overall level is not very high, needs to be improved. One of the most widely used Crane tube designed for 64 years of products, the structure shown in Figure 1. Because of its light weight, flexible rotation, low cost, wide range of use, good maintenance and other characteristics, it is suitable