一般下芯时,要求泥芯吊得比较平稳,以免碰坏。但对于较复杂的泥芯,往往很难吊得平稳。为使下芯平稳,可采用如图所示的可调节式吊芯链条。其中花兰螺丝(又名开式索具螺丝扣,外购)可根据不同的许用负荷进行选择,其号码分为0.07、0.1、0.2、0.3、0.4、0.6、0.7、0.9八级,许用负荷分别为70、100、250、320、440、630、770、980公斤,可调节距离为75～220毫米。吊装时,由于下端是右螺纹,上端是左螺 Under the general core, the mud core crane asked to be relatively stable, so as not to damage. But for the more complex mud core, it is often difficult to hang smooth. In order to make the core smooth, can be used as shown in the adjustable hanging core chain. Among them, Orchid screw (also known as open-type screwdriver, purchased) can be selected according to different allowable load, the number is divided into 0.07,0.1,0.2,0.3,0.4,0.6,0.7,0.9 eight, Xu With the load were 70,100,250,320,440,630,770,980 kg, adjustable distance of 75 to 220 mm. When lifting, because the lower end is the right thread, the upper end is the left screw