Universal bridge crane: a general purpose bridge crane, mainly including hook bridge crane, grab bridge crane, electromagnetic bridge crane, dual-purpose bridge crane, and three purpose bridge crane.
Structural composition
The general bridge crane is mainly composed of a large vehicle operating mechanism, a small vehicle operating mechanism, a lifting mechanism, and electrical equipment. The two ends of the bridge are supported by running devices on elevated tracks above the factory building or outdoor freight yard, and run longitudinally along the tracks; The crane trolley runs horizontally along the trolley track on the main beam of the bridge.
Basic parameters
The basic parameters of a general bridge crane include:
1. Rated lifting capacity. When there are main and auxiliary hooks, the rated lifting capacity is expressed in fractions, where the numerator represents the lifting capacity of the main hook and the denominator represents the lifting capacity of the auxiliary hook.
2. Span. Also known as span, it refers to the distance between two parallel tracks on which a crane travels. The span of a crane is generally 1.5 meters smaller than that of a workshop, with each 3 meters of span being a level, ranging from 10.5 meters to 31.5 meters. A span greater than 31.5 meters is considered non-standard.
3. Speed. The speed is determined by the busy workload of the crane, with lower speeds for light work and faster speeds for heavy work. The lifting capacity is small, but the speed can be faster. If the lifting capacity is large, the speed should be slowed down, otherwise it will be detrimental to safety.
The speed of a general bridge crane includes four aspects:
One is the speed of the large vehicle. There are three types of moving speeds for large vehicles: 80, 100, and 120m/min;
The second is the speed of the car. The moving speed of the car is generally 40m/min;
The third is the lifting speed of the hook. Generally 8-20m/min;
The fourth is the lifting height. The standard lifting height of the hook is 12m, with each additional 2m being a level up to 32m.
