This invention discloses a series-driven automatic
fluid loading and unloading arm and its usage method, including a
vertical displacement mechanism mounted on a column and capable of reciprocating vertically along the column; a
pipe string
assembly comprising a fluid source adapter
pipe, a first
pipe body, a second pipe body, a third pipe body, a fourth pipe body, a fifth pipe body, and a sixth pipe body connected sequentially by a first rotary joint, a second rotary joint, a third rotary joint, a fourth rotary joint, a fifth rotary joint, and a first
fixed joint, with the end of the sixth pipe body away from the first
fixed joint pointing vertically downwards; the third pipe body being fixed on the
vertical displacement mechanism; and the fluid source adapter pipe being mounted on the column. The axes of the first, second, and third rotary joints are horizontal and parallel to each other, while the axes of the fourth, fifth, and first fixed joints are vertical and parallel to each other. A first-stage rotary drive mechanism is mounted on the
vertical displacement mechanism, with its rotary output end connected to the outer ring of the fourth rotary joint; and a second-stage rotary drive mechanism has its rotary output end connected to the outer ring of the fifth rotary joint. The purpose of this invention is to solve the problem that the vertical filling pipe at the end cannot be kept in a
fixed position in the horizontal plane when the height changes, as well as the problem of large load pressure and
bending moment caused by the center of gravity being far from the column.