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近几年来,由于工业生产的跃进,工厂不断新建或扩建,所以应用最为普遍的桥式起重机生产的数量远远满足不了订货的需要。这样就出现了企业之间的起重设备相互调拨和企业内部的设备搬迁现象;有的企业经过技术改造以后,把老厂房的跨度扩大了,但需要利用原有的桥式起重机,于是就出现了使用单位需要对起重机的跨度进行改制的问题,即将原有起重机的跨度由大改小或由小改大,以适应厂房跨度的需要。
In recent years, due to the leap forward in industrial production, factories are constantly being built or expanded. Therefore, the number of bridge cranes that are most commonly used in production can not meet the needs of ordering. In this way there has been the transfer of lifting equipment between enterprises and equipment relocation within the enterprise phenomenon; some enterprises after technological innovation, the expansion of the span of the old plant, but the need to use the original overhead crane, so there The use of units need to span the span of the restructuring problem, about the original crane span from large to small or small to adapt to the needs of plant span.