Semi gantry crane belongs to a kind of light crane, one side has support leg, the other side is supported by the walls of the workshop, with advantages of simple structure, easy installation, light weight, good wind resistance performance, etc.. There are two type: single girder semi gantry crane and double girder semi gantry crane.
The structure of main girder, support leg, lifting system, running system, etc. Main girder mainly diagonal type rail structure, height of leg can vary according to the needs of the construction site of the project, lifting system can be equipped with electric hoist or trolley,The crane relies on the power system to drive the longitudinal orbits of the ground and the wall.
1. The cost is lower than the gantry crane
2. Easy to install and remove, easy to maintain
3. Reasonable structure design, good performance and interchangeable parts
The semi – gantry crane is supported by one side support leg, and the other side is supported by the wall, which is widely used in workshops, open Spaces, warehouses, ports and shipyards.
The safety device are not only the electric protective devices or alarm bell but other equipments are necessary to guarantee the normal operation of crane and avoid the personal casualty and mechanical damage.Such as:
1. Limit switch, travelling and lifting
2. Overload limiter, lifting height limiter
3. Loss pressure protection, fault phase protection
4. Polyurethane rubber buffer, long service life and impact resistance
5. Emergency stop system, protect personnel and equipment in case of emergency