Accumulators are divided into the horizontal accumulator and vertical accumulator. The vertical accumulator requires a high plant height due to its vertical arrangement. Commonly used in processing lines equipped with furnaces. A horizontal accumulator does not require tall workshops, but occupy a large area and are commonly used in pickling production lines and galvanizing production lines. The horizontal accumulator is divided into two types: a swing door accumulator and a carriage trolley accumulator. For the accumulator with a gate swing arm, there are two common driving methods: reel driving and pulley driving.