起重机金属结构.doc

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秫涉旺韦尘坛叽磐茆筏季腿茁臬
附录A巍埔蜈羽桓峭拚钭漤喳盖漤安加
Hoist crane metal structure是饫估纭阶偌截痘罐吱帕惶传倏
Flows -like in the hoist crane, the majority of tire hoist crane, the crawler crane as well as the partial autohoist and special-purpose flows -like the hoist crane, all installs has clothes rack the bracket arm, and through lifts using its peak block and tackle installs changes lifts the steel wire position, thus realization heavy item fluctuation; Again changes its height of lift and the working radius through the change clothes rack bracket arm length and the angle of tilt. Therefore, maintenance clothes rack bracket arm incompleteness is extremely important. Because the hoist crane rises and falls the heavy item work content the multiplicity and all kinds of work environment, as well as the hoist crane pilot operational level high low status reason (has also contrary operation), these can create clothes rack the bracket arm varying degree damage, even folds the arm or the personnel casualty珲倔耕峡罟蜞热著甥柑镫溘泪崧
On clothes rack the bracket arm steel pipe is specially in the welding place, very easy to appear the crack; This must examine carefully, when necessity applies the magnifying glass careful observation. According to we many year experiences, is very small when the crater place crack, must carry on the regular track inspection,