grab bucket gantry

This paper briefly introduces the technical process of the erection of main beam joints and main beam of 5t double-beam gallows crab bucket by usi ng 500×500 portal frame, sleepers and 50 t and 30 t autocranes, and expounds em phatically the overall design of the schemes, the selection of bearing platform s steel columns, the verification of the strength, and the erection of the platf orm, etc.

主要介绍了利用500×500龙门架,道木及50t、30t汽车吊进行5t双梁龙门抓斗主梁接头、主梁安装的工艺过程,并对其方案总体设计情况、支撑平台钢柱的选择、强度校验及平台搭设等环节进行了重点阐述。

Due to design problem on controlling circuit of clamshell crane in calcination workshop, the wire rope damage, overload device breakdown and contactor burm-out are frequently occured during operation.

煅烧车间抓斗吊车电气控制回路由于设计上原因 ,在操作中钢绳经常被拉断、主过流继电器烧坏、接触器触头烧坏。

The Application of VFDs to bridge grabbing cranes;

变频调速器在桥式抓斗吊车中的应用