QD Double Girder Bridge Crane

Introduction of QD Double Girder Bridge Crane
QD bridge cranes are most widely used in workshops and warehouses to lift work products and goods. It is dependence on longitudinally move along with the direction of workshop orbital, transversely move of cab and heaving motion of lifting hook that Hanger Bridge Crane works to lift goods.
What common use bridge cranes here refer to are general-purpose bridge crane and metallurgical-purpose bridge crane, the former mainly applies to machining operation and auxiliary lifting work required in assembly workshop, metal structure workshop, mechanical maintenance workshop, various warehouses, metallurgy and casting workshop, while the latter is suitable for lifting red-hot and molten metals.

Application and Control Mode of QD Double Girder Bridge Crane
QD Double Girder Bridge Crane is widely used in workshop, goods yard, wharf, etc. to transport materials.
QD Type Hanger Bridge Crane is controlled in driver’s chamber.

Working Environment of General-purpose QD Double Girder Bridge Cranes

General-purpose Bridge crane are not recommended to applies to areas where temperature higher than +40°C or lower than -20°C and workshops in which have strong corrosive chemicals. It can not be used to lift red-hot metals or molten metals.

Main Parameters of QD Double Girder Bridge Crane
1.Lifting height: 6 types
5T, 10T, 16/3.2T, 20/5T, 32/5T, 50/10T
2.Span: 8 types
10.5M, 13.5M, 16.5M, 19.5M, 22.5M, 25.5M, 28.5M, 31.5M
3.Working class
A5 (applies to places where not used frequently, such as general machining operation and assembly workshop)
A6 (applies to places where used relatively frequently, such as auxiliary lifting work in metallurgy and casting workshop)
A7 (applies to places where used frequently, such as lifting for red-hot and molten metals)
According to use frequency, working class of QD Type Double Girder Bridge Crane can be divided into two classes: A5 and A6.

QD hanger bridge crane


Structure of QD Double Girder Bridge Crane
QD Hanger Bridge Crane is mainly composed of bridge, crab(which is equipped with hoisting mechanism and traveling mechanism), crane traveling mechanism and electrical appliances.
Hoisting mechanism, crab traveling mechanism and traveling mechanism are the three working mechanisms of crane, each of which has its own motors and drives respectively.
Single hook crane means those cranes whose lifting weight are 5T and 10T, these type of crane owns only one set of hoisting mechanism. Cranes of whose lifting weight are 16/3.2T to 50/10T own two hooks-- two set of independent hoisting mechanism, main and auxiliary hoisting mechanism. Main hook applies to lift heavy products, while auxiliary hooks are used to lift light products and help main hooks to rotate or overturn products within rated load scope. However, there is one thing that has to pay special attention, two hooks lift two products at the same time is not allowed. When two hooks work together, the total weight of products can not exceed rated lifting weight of main hook.

Technical Parameter of 
QD Double Girder Bridge Crane

QD Hanger Bridge Crane 5-10T QD Hanger Bridge Crane 5-10T
QD Hanger Bridge Crane 16-20T QD Hanger Bridge Crane 16-20T
QD Hanger Bridge Crane 32-50T QD Hanger Bridge Crane 32-50T
QD Hanger Bridge Crane 75T QD Hanger Bridge Crane 75T
QD Hanger Bridge Crane 100T QD Hanger Bridge Crane 100T
QD Hanger Bridge Crane 125-200T QD Hanger Bridge Crane 125-200T
QD Hanger Bridge Crane 300-350T QD Hanger Bridge Crane 300-350T
QD Hanger Bridge Crane 400-450T QD Hanger Bridge Crane 400-450T

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