1. Ordinary gantry crane
This kind of crane mostly adopts box type and truss type structure, which is the most widely used. It can handle various pieces and bulk materials, with a lifting capacity of less than 100 tons and a span of 4 to 39 meters. Ordinary gantry cranes with grabs work at a higher level. Ordinary gantry cranes mainly refer to hook, grab, electromagnetic and hoist gantry cranes, as well as semi-gantry cranes.
2. Hydropower station gantry crane
Mainly used for lifting and opening and closing gates, and also for installation operations. The lifting capacity is 80-500 tons, the span is small, 8-16 meters, and the lifting speed is low, 1-5 meters per minute. Although this kind of crane is not often hoisted, once it is used, the work is very heavy, so the work level should be appropriately improved.
3.Shipbuilding gantry crane
It is used to assemble the hull on the slipway, and there are always two lifting trolleys: one has two main hooks, which run on the track of the upper flange of the bridge; the other has a main hook and an auxiliary hook, which are on the lower flange of the bridge. Runs on rails for flipping and hoisting large hull sections. The lifting weight is generally 100-1500 tons; the span is 185 meters; the lifting speed is 2-15 m/min, and the fretting speed is 0.1-0.5 m/min.
4. Container Gantry Crane
For container terminals. Containers unloaded from a ship by a quayside container carrier bridge by a trailer
After being transported to the yard or the rear, it is stacked by the container gantry crane or directly loaded and transported away, which can speed up the turnover of the container carrying bridge or other cranes. The yard that can store containers with a height of 3 to 4 layers and a width of 6 rows is generally a tire type, and a rail type is also useful. Compared with the container straddle, the container gantry crane has a larger span and height on both sides of the gantry. In order to meet the transportation needs of the port terminal, this kind of crane has a higher working level. The lifting speed is 8-10 m/min; the span is determined according to the number of container rows that need to be spanned, the maximum is about 60 meters, corresponding to the lifting weight of 20-foot, 30-foot, and 40-foot long containers of about 20 tons and 25 tons, respectively. and 30 tons.