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2011-10-17 22:10:00
电焊安全技术
(一)电焊对人体的危害:
1.触电伤害:
(1)人体某部位碰到焊条或夹钳的导体,同时脚或其它部位对地面或金属构件之间没有绝缘物而触电。
(2)电焊机外壳漏电,又没有良好的保护接零或接地,人体碰到电焊机外壳而触电。
(3)人体某部位碰到裸露的接头,破皮或绝缘失效的电线而触电。
(4)接线错误,使电焊机外壳带电,导致触电事故的发生。
2.电焊弧光伤害
(1)电焊机工作时,电弧产生强烈的可见光线和大量不可见的紫外线,直接照射眼球后可引起结膜炎,使人感到眼痛,流泪,眼痉挛和怕见光亮。轻者1—2天就好,重者会破坏视网膜,使视力显著下降,甚至失明。
(2)弧光不但伤害眼睛,而且还有害于外露的皮肤。一般在距离电焊机的弧光10米多远,就不会受到伤害。
3.有害气体和烟尘
(1)在电弧焊接中,由于电弧高温区的物理化学反应,产生锰铬的氧化物和烟尘,以及氟化物、氮氧化物、臭氧气体,由于钢板表面涂料的影响,又有铅、锌等氧化物的烟尘产生。
(2)有害气体和烟尘的成份和浓度,主要取决于焊条药皮的成份,表面涂料和作业环境。这些气体和烟尘吸入人体,对健康都有一定的影响。
(二)防护知识
1.隔离防护。电焊设备应有良好的隔离装置,避免人与带电导体接触。焊机的接线端应在防护罩内,电源线一般不超过2~3米,并应设置在靠墙壁不易接触处。临时需要使用较长的电源线,应架高2.5米以上。电焊机与设备间、墙间至少应留1米宽的通道。
2.绝缘良好。为防止电焊机绝缘被破坏,应做到:电焊机应在规定的电压下使用,供电线路上都应接有符合规定要求的熔断保险装置,防止电焊机受湖、电焊机电流过载,超过允许电流。
3.安装自动断电装置。使电焊机引弧时电源开关自动合闸,停止焊接时电源关机自动跳开,以免焊工在更换焊条时触电。
4.穿戴好安全防护用品。如绝缘手套、绝缘鞋等。
5.对电焊机外壳采取良好的保护接地或接零。但要注意,电焊机的二次回线端与焊件不得同时接地或接零。
6.在金属容器、潮湿的工地或地沟内,在金属构架或天车上焊接时,除手和脚必须绝缘保护外,照明灯应为12伏。并设监护人,密切注视焊工的动态。
7.在高处焊接时,必须有良好的脚手架和保护栏杆,并使用安全带。
大风 | 阅读全文 | 回复(15) | 引用通告 | 编辑

2016-9-6 20:26:22
原创
原创(游客)http://njryw2016.lofter.com/post/1e59a72f_c3b50a5 http://njryw2016.lofter.com/post/1e59a72f_c3b50a4 http://njryw2016.lofter.com/post/1e59a72f_c3b50a3 http://njryw2016.lofter.com/post/1e59a72f_c3b50a2 http://njryw2016.lofter.com/post/1e59a72f_c3b50a1 http://njryw2016.lofter.com/post/1e59a72f_c3b50a0 http://njryw2016.lofter.com/post/1e59a72f_c3b509f http://njryw2016.lofter.com/post/1e59a72f_c3b509e http://njryw2016.lofter.com/post/1e59a72f_c3b509d http://njryw2016.lofter.com/post/1e59a72f_c3b509c
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2016-9-28 20:04:02
原创
原创(游客)http://bjseoywj.lofter.com/post/1e66bf3e_c7117b3 http://wztgywj.lofter.com/post/1e65f473_c6eddb8 http://wztgywj.lofter.com/post/1e65f473_c6ef72e http://ywjseo.lofter.com/post/1e634752_c64ff24 http://seogsywj.lofter.com/post/1e634756_c6de907 http://seogsywj.lofter.com/post/1e634756_c6de46a http://wztgywj.lofter.com/post/1e65f473_c6eeae9 http://bjseoywj.lofter.com/post/1e66bf3e_c707623 http://ywjseo.lofter.com/post/1e634752_c651a6f http://ywjseo.lofter.com/post/1e634752_c65101e
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2016-9-30 14:44:03
原创
原创(游客)http://rywywj.lofter.com/post/1e6a80c3_c823a9e http://rywywj.lofter.com/post/1e6a80c3_c824440 http://rywkdks.lofter.com/post/1e698063_c7f9f39 http://rywywj.lofter.com/post/1e6a80c3_c823391 http://rywydx.lofter.com/post/1e6a68e3_c815b21 http://njryw168.lofter.com/post/1e6983e5_c7f2ece http://njryw168.lofter.com/post/1e6983e5_c7ecda2 http://rywywj.lofter.com/post/1e6a80c3_c820e76 http://njryw168.lofter.com/post/1e6983e5_c7edfec http://rywywj.lofter.com/post/1e6a80c3_c823ed2
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2016-10-8 15:35:19
Re:在漫画中识别身边的违章
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bquyb(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-11 17:51:30
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ondxb(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-16 22:56:47
Re:在漫画中识别身边的违章
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partw(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-17 13:09:56
Re:在漫画中识别身边的违章
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duzbe(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-19 6:16:58
Re:在漫画中识别身边的违章
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ywlpl(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-21 15:47:23
Re:在漫画中识别身边的违章
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ynsux(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-21 21:29:58
Re:在漫画中识别身边的违章
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evzdi(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-22 23:50:38
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lhycf(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2016-10-23 12:07:20
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upgko(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
2017-2-20 16:48:26
Re:在漫画中识别身边的违章
qpfhl(游客)http://wen.28.com/article/43728
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