矿山起重机械厂家设计Ψ 生产的防爆天车、防爆桁吊、防爆双梁桥式起重机产品简介：
QB型5-50/10吨防爆桥式起重机的↓结构组成和QD型吊钩桥式起重机相同，由双主梁桥架、大车运行机构、小车运行机构，起重小车、电器、司机室等组成。取物装置也是吊钩，只不过防爆桥式起重机的电机、电器、车轮、吊钩等都是防爆的。
QB型5-50/10吨防爆桥式起重机所有电机、电器防爆性能符合GB3836.2-2 000《爆炸性气体环境用防爆电气设备第2部分：隔爆型“d”》、整机性能符合JB/T5897-1991《防爆桥式起重机》标准之规定，防爆标志为ExdIIBT4、ExdIICT4，但ExdIICT4级别高。
本防爆行吊产品适用于工厂内传爆能力不高于IIB或IIC级，引燃温度组别不低①于T4组的可燃性气体或蒸气与空气形成的爆炸性气体混合物的场所，适用的危险区域为1区或2区。本产品有地操和空操两种，工作级别为中级。
本产品一般为地面操作，根据用户需要也可以司机室操作。工作级别为中级。
Explosion-proof performances of all motors and electric components of QB explosion-proof crane satisfy standards stipulated by GB3836.2-2000 Explosion-proof Electric Equipment Working in Explosive Gas Envircmment Part2：Flame-proof Type“D”，and the performance of the crane satisfies demands in JB／T5897-1991 Explosion-proof Crane．The crane has obtained Explosion-proof Certificate after passing examinations by units designated by the government to test explosion-proof products．The explosion-proof marks are Exd II BT4 and Exd II CT4 respectively．
This product is suitable for areas where the explosion。transmission is not higher than II B or II C and the ignition temperature group of inflammable gas or explosive mixture of steam and gas is not lower than T4．Applicable dangerous zones are zone 1 and zone 2(please refer to GB3836.1-2000 fordetails)．
This product is generally controlled on the ground，but control from the driver’s cabin is also allowable．The working grade is intermediate．
注：5-10t起重机无副钩
Note：5-10t crane does not have a auxiliary hook．
