黄瓜视频二维码

　　門(men)式起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)是(shi)(shi)橋式起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)的(de)(de)(de)一種變形，又(you)叫(jiao)龍門(men)吊。主(zhu)要(yao)用(yong)(yong)(yong)(yong)于室外的(de)(de)(de)貨(huo)(huo)場(chang)、料(liao)場(chang)貨(huo)(huo)、散(san)貨(huo)(huo)的(de)(de)(de)裝卸作(zuo)(zuo)業(ye)。門(men)式起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)具有(you)場(chang)地(di)利用(yong)(yong)(yong)(yong)率高(gao)、作(zuo)(zuo)業(ye)范圍大、適應(ying)面(mian)廣、通用(yong)(yong)(yong)(yong)性強等特點，在港口貨(huo)(huo)場(chang)得到(dao)廣泛使用(yong)(yong)(yong)(yong)。　　它的(de)(de)(de)金(jin)屬結(jie)構(gou)像門(men)形框架，承載主(zhu)梁(liang)下安裝兩(liang)條支腳，可以直接在地(di)面(mian)的(de)(de)(de)軌道上行(xing)走，主(zhu)梁(liang)兩(liang)端可以具有(you)外伸(shen)懸(xuan)臂梁(liang)。　　工(gong)(gong)作(zuo)(zuo)級別(bie)(bie)　　龍門(men)吊也(ye)就(jiu)是(shi)(shi)門(men)式起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)工(gong)(gong)作(zuo)(zuo)級別(bie)(bie)A：它反(fan)映了起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)在載荷(he)狀態(tai)和(he)利用(yong)(yong)(yong)(yong)繁(fan)忙程度(du)兩(liang)個(ge)方(fang)面(mian)的(de)(de)(de)工(gong)(gong)作(zuo)(zuo)特性。　　工(gong)(gong)作(zuo)(zuo)級別(bie)(bie)的(de)(de)(de)劃(hua)分是(shi)(shi)由起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)的(de)(de)(de)利用(yong)(yong)(yong)(yong)等級U和(he)載荷(he)狀態(tai)Q決定的(de)(de)(de)。它們分為A1～A8八個(ge)級別(bie)(bie)。起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)工(gong)(gong)作(zuo)(zuo)級別(bie)(bie)，　　也(ye)就(jiu)是(shi)(shi)金(jin)屬結(jie)構(gou)的(de)(de)(de)工(gong)(gong)作(zuo)(zuo)級別(bie)(bie)，按起(qi)(qi)(qi)(qi)(qi)升機(ji)(ji)構(gou)確定，分為A1－A8級，若與(yu)中(zhong)(zhong)國規定的(de)(de)(de)起(qi)(qi)(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)工(gong)(gong)作(zuo)(zuo)類型對照，　　大體上相(xiang)當于：A1－A4－輕；A5－A6－中(zhong)(zhong)；A7－重(zhong)(zhong)(zhong)，A8－特重(zhong)(zhong)(zhong)。

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