目前国内使用的铁路槽车顶部密封装载设备基本上分为二种类型,一类为桁架结构,俗称大鹤管,另一类为硬管加旋转节结构,称为流体装载臂,俗称小鹤管。 1 关于大鹤管 国内目前大鹤管采用6″～8″的口径,因口径相对较大,装车效率也相对提高。但也存在若干不尽人意的地方,主要是机构尺寸较大、,结构相对复杂、故障率和维护成本较高、安装维修不便、 At present, there are basically two types of sealing and loading equipment at the top of railway tankers used in China. One type is a truss structure, commonly known as a crane pipe, and the other is a rigid pipe plus a rotating joint structure, called a fluid loading arm, commonly known as a small crane tube. 1 on the crane pipe At present, domestic crane pipe using 6 “~ 8” diameter, due to the relatively large diameter, loading efficiency is also relatively improved. However, there are also a number of unsatisfactory places, mainly large size institutions, the structure is relatively complex, higher failure rates and maintenance costs, installation and maintenance inconvenience,