Bridge crane is a crane running on an elevated track, also known as a crane. Its hoisting trolley runs laterally along the track of the crane, which can make full use of the space under the bridge crane to lift materials without being hindered by ground equipment. The gantry crane is a variant of the bridge crane, also known as the gantry crane. The distinction between bridges and gantry cranes can be based on the following points:
The structure of the crane
The bridge crane structure is divided into steel structure part, mechanical transmission part and electrical part. The steel structure part consists of a bridge frame and a trolley frame, and the bridge frame consists of a main beam, an end beam, a walking platform, a guardrail and an operating room. The trolley consists of a frame and a railing; the mechanical transmission part consists of a cart running mechanism, a trolley running mechanism and a hoisting mechanism; The electrical part consists of electrical circuits and electrical equipment.
The gantry crane is generally a lifting device with a gantry-like frame structure. There are outriggers and a walking mechanism installed under the main girder that is carried. It can walk directly on the track on the ground, and the two ends of the main beam can have outrigger cantilevers. The gantry crane is composed of a gantry, a large and a trolley traveling mechanism and an electrical part. The gantry is composed of main beam, outriggers and beams; the large and small cars are composed of the wheel box part and the reducer motor; the electrical part includes the operation room and cables.
The lifting of the crane
Bridge cranes are mainly used in workshops, warehouses and freight yards to load and unload hoisted goods. Hoisting is a fixed lifting weight, ranging from a few tons to several hundred tons.
Gantry cranes are mainly used in outdoor material yards such as warehouses, stations, ports, and wharves for loading and unloading of goods. Carry single or large bulky loads.
The advantages and disadvantages of cranes
Bridge cranes have large lifting capacity, high speed and high efficiency; however, bridge piers need to be built at the loading and unloading site, resulting in increased costs. During operation, the goods can only be hoisted within the span, and the working area is small.
The gantry crane has high site utilization rate, large operating range, wide adaptability, strong versatility, and can be used in port cargo yards.
