更换多绳提升绞车主绳,乃是维护这些设备最复杂、最繁重和最长的工序之一。由于多绳提升的绳不能永久使用,全部主绳需要同时更换,因此要研制一种专门的换绳机械。直到目前为止,用于换绳的机械既笨重又费钱,还没有找到一种令人满意的办法。 本文作者认为这个问题至今没有解决。因为,力求把单绳绞车常用的换绳方式同样地用到多绳提升时,没有考虑到这两种机器之间本质的差别。这种方式换绳,新绳只能从地面放下去,在这种情况下,绞车上绳重 Replacing the multi-rope winch main rope is one of the most complex, heaviest and longest processes for maintaining these machines. As the multi-rope hoisting rope can not be used permanently, all the main ropes need to be replaced at the same time, so to develop a special rope changing machinery. So far, the machinery used to change the rope is cumbersome and expensive, and a satisfactory solution has not yet been found. The author believes that this problem has not been solved so far. Because, in an effort to use the same change-over mode of a single rope winch as that of a multiple rope lift, the essential differences between the two machines are not taken into account. This way change rope, the new rope can only be put down from the ground, in this case, the winch rope weight