| 摘要 |
PROBLEM TO BE SOLVED: To hedge against risks of oil spill from all the pipes due to the damage of only one single valve while oil of a plurality of hydraulic pipes can be drained in a lump sum. SOLUTION: Depressurization blocks 8 are installed by straddling a plurality of hydraulic pipes 3..., 4.... The pressurization block 8 comprises: main passages to which the pipes 3..., 4... are connected; depressurization valves 10... for removing oil on the inside of the pipes by an opening operation from the outside; and a drain passage for joining and guiding the oil removed from the depressurization valves 10..., and the oil in all the pipes 3..., 4... is all removed to the outside. Operation elements of the deprssurization valves 10... are operated to open at the same time by a push plate having protrusion so that the operation elements are held open. COPYRIGHT: (C)2008,JPO&INPIT |
