A summary of bridge cranes and Longmen cranes

Keyword:bridge cranes, Longmen cranes   Time:2018-11-30 16:02:48

Bridge cranes and Longmen cranes
The crane is an installation machine for transmitting small and  medium loads within a short distance, with all kinds of designs such as bridge cranes and Longmen cranes. Both fixed and mobile cranes have manual or power driven lifting methods. One of the few cranes that can not be modeled as industrial vehicles is bridge cranes, and the other is Longmen cranes. A beam and end trucks are the whole structure of a bridge crane. There are three motion axes above which are provided by cranes and trolley across the bridge. the electric  trolley is responsible for moving the load up and down, while end carriage (end  truck) moving the load forward and backward which sit below the bridge on the crane. 
 The size of the general bridge cranes includes:
 Designed for a maximum lateral slope of 1%, a NEMA truck with a maximum longitudinal gradient of 3%, NEMA 4 wind proof, cold weather protection, emergency brake, will stop the crane at 12 ', and as a brake  (braking speed is 50 mph), the complete bolt connection structure. In order to  facilitate installation and disassembly, it is convenient for repositioning.  Radio remote controller and a full-length cat step are connected with 1 legs of  access ladder.
 As a cost-effective option, new and used bridge cranes are becoming more and more popular. It is also a notable category of crane. The track operates along one or two beams in the horizontal direction, and plays a  powerful role in the pulley system suspended on the track. beam bridge or beam girder as the support of the two ends. A bridge moving along a pair of horizontal tracks allows a crane to serve in a large rectangular area. There is one kind of space that uses rotation, that is, circular space.
 Longmen crane or bridge crane is a form of crane. The crane  installed on the trolley is used to lift loads. In order to move horizontally,  a pair of tracks can be installed on rails or beams. This is very suitable for lifting the bridge cranes and the Longmen cranes. Large Longmen cranes can be used in shipbuilding. This type of Longmen crane allows large objects, such as the engine of a ship, to be lifted and moved on the ship, or even across the hull. Generally speaking, bridge cranes or longmen cranes are movable overhead cranes that can drive on a fixed runway structure and have movable or fixed hoisting mechanisms.

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