Single beam electronic crane It consists of a single overhead beam, two rails, an end truck, two runway beams and a hoist for lifting the cargo on the overhead beam. The end truck runs on the rails fixed on the runway beam.
Performance parameters of bridge cranes
1. Lifting capacity: refers to the mass of the hoisted object, in kg or t. It can be divided into rated lifting capacity, maximum lifting capacity, total lifting capacity, effective lifting capacity, etc.
2. Lifting height: the distance between the center of the hook and the ground.
3. Working level. An indicator of the working status of the whole machine that indicates the full load degree of the crane's lifting load and the number of lifting operations. The working level of the crane is divided into 8 levels, A1-A8, light (A1-A3), medium. (A4, A5), heavy (A6, A7), extra heavy (A8).
4. Wheel pressure: When the overhead deadweight and the trolley are in the extreme position, the maximum vertical pressure exerted on the trolley wheel by the trolley deadweight and the rated lifting weight.
5. The span of the bridge crane. The distance between the two track center lines of the bridge crane's running track is called the span of the bridge crane. It is expressed as:. L. The unit is generally:. M.
Specific performance parameters
Load Capacity is the maximum weight the crane is designed to lift. It is usually specified in tons or kilograms.Safe Working Load is the maximum load that can be safely lifted under normal operating conditions.
Span is the horizontal distance between the crane's two rails. The span determines how wide an area the crane can cover.
Lifting Height is the maximum vertical distance the crane hook can travel from its lowest point (ground level or reference point) to the highest point.
Hoisting Speed is the rate at which the crane's hook moves vertically, usually measured in meters per minute (m/min).Travelling Speed is the speed at which the crane travels along the bridge (horizontal movement), typically in meters per minute.Cross Travel Speed is the speed at which the crane moves perpendicular to the bridge (across the rails).
Duty Cycle or Class is typically classified as:
Class A (Light duty): Occasional use, low frequency of operation.
Class B (Medium duty): Moderate use, higher frequency.
Class C (Heavy duty): Frequent use, heavy lifting.
Class D (Severe duty): Continuous use, extreme conditions.
Classification of bridge cranes
1. General bridge cranes refer to general bridge cranes that work in general environments.
2. Grab-type bridge cranes are mainly used for loading, unloading and lifting operations of bulk cargo, scrap steel, wood, etc. Except for the lifting mechanism, the structural components of this crane are the same as those of general hook-type bridge cranes.
3. Three-purpose bridge cranes are multi-purpose cranes. Its basic structure is the same as that of electromagnetic bridge cranes. It can lift heavy objects with hooks as needed, or hang motor grabs on the hooks to load and unload materials, and it can also remove the grabs and lift ferrous metals with electric panels.
4. Double-trolley bridge cranes are basically the same as hook-type bridge cranes, except that two trolleys with the same lifting capacity are installed on the bridge frame. This type of machine is used for lifting and loading and unloading long objects.
