井架、外用电梯安全须知道
1、外用电梯应有哪些安全防护装置?
答:制动器、限速器、门联锁装置、上、下限位装置。
2、外用电梯应悬挂什么标志?
答:应悬挂限载重量和承载人数的提示标志。
3、高架物料提升机安全防护装置应有哪些?
答:安全停靠装置、断绳保护装置、超高限位装置、下极限限位器、缓冲器、超载限制器。
4、井架提升机架体顶部的自由高度不得大于多少米?
答:不得大于六米。
5、井架钢丝绳绳卡的数量不得少于几个?
答:不得少于三个。
6、在井架旁应悬挂什么安全标志?
答:“严禁乘人”的警示标志。
7、钢丝绳在卷筒上应不少于多少圈?
答:不少于三团。
8、井架提升机应具有哪几种安全防护装置?
答:1、安全停靠装置;2、楼层口防护门;3、吊篮安全门;4、上料口防护棚;5、上极限限位器;6、紧急断电开关,7、信号装置。
9、低架提升机基础有何要求?
答:1、土层压实后的承载力,不小于80mpa;2、浇筑C20混凝土,厚度300cm;3、基础表面平整、水平
度偏差不大于10cm。
10、物料提升机安全缓冲距离应为多少?
答:3米。
11、井字架的第一导向滑轮与卷扬机距离应为多少?
答:卷扬机卷筒系带槽卷筒的为卷筒宽度的15倍;卷扬机卷筒系无槽卷筒的为卷筒宽度的20倍。
12、什么是“十不用”原则?
答:1、被吊物重员超过机械性能允许范围不准吊;2、信号不清不准吊,3、吊物下方有人站立不准吊;4、吊物上站人不准吊;5、埋在地下的物品不准吊;6、斜拉斜牵物不准吊;7、散物捆绑不牢不准吊;8、零散物不装容器不准吊;9、吊物重量不明、吊索具不符合规定不准吊;10、六级以上大风、大雾天影响视力和大雨雪时不准吊。
13、起重吊运指挥信号有哪几类2
答:手势信号,旗语信号和音响信号。
14、吊钩挂绳处断面磨损超过原高度的多少时应报废?
答:超过原高度的10%应报废。
15、塔吊作业前重点检查内容有哪些?
答:1、机械结构外观情况,各传动机构应正常;2、各齿轮箱、液压油箱的油位应符合标准;3、主要部位连接螺栓应无松动,4、钢丝绳磨损情况及穿绕滑轮应符合规定,5、供电电缆应无破损。
16、起重机吊运物体时是否可以从入的头顶越过?
答:不可以,起重吊运物体禁止从人的头顶超过。
17、起重机械的信号员的主要责任是什么?
答:吊运过程中,给操作人员适当的指示信号,令吊运工作顺利进行。
18、什么是塔吊安全装置的“四限位两保险”?
答:四限位:力矩、超高、变幅、行走限位装置。两保险:吊钩保险和卷筒保险装置,
19、发生塔机事故的原因有哪些?
答:1、无证操作;2、超负荷运行;3、指挥信号错误,造成误操作;4、歪拉斜吊;5、安全装置失灵;6、轨道与附着装置安装不合要求:7、不履行保养检修制度,故障未及时排除;8、对气候变化估计不足,特别是夜间无人工作时遇有大风,夹轨钳夹持不住。
20、当塔吊扶梯设在结构内部时,什么情况下可不设护圈?
答:扶梯与结构间的自由通道间距小于l.2m时,可不设护圈。
21、塔式起重机的轨道的纵横向不平度如何规定?
答:均不得大于1%。
22、钢丝绳在什么情况下应进行更换?
答:钢丝绳断丝数在捻节距内超过总丝数的10%,绳径磨损40%,应更换新绳。
23、《建筑安装工程安全技术规程》规定,遇有多少级风力的时候,禁止露天进行起重工作和高空作业?
答:六级以上的强风。
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