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起重滑轮的安全使用 | 2009-8-10 8:22:00
Re:起重滑轮的安全使用
|
2009-8-10 8:23:55
1滑轮直径与钢丝绳直径的比值h2,不应小于表8的数值。
平衡滑轮直径与钢丝绳直径的比值h平 不得小于0.6h2。对于桥式类型起重机,h平 应等于h2。对于临时性、短时间使用的简单、轻小型起重设备,h2值可取为10,但最低不得小于8。
2滑轮槽应光洁平滑,不得有损伤钢丝绳的缺陷。
3滑轮应有防止钢丝绳跳出轮槽的装置。
4金属铸造的滑轮,出现下述情况之一时,应报废:
a裂绞;
b轮槽不均匀磨损达3mm;
c轮槽壁厚磨损达原壁厚的20%;
d因磨损使轮槽底部直径减少量达钢丝绳直径的50%;
e其它损害钢丝绳的缺陷。
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