| 摘要 |
PURPOSE:To enable underwater working under an atmosphere of a satisfactory airtightness by providing a high speed air flow discharge nozzle for locally excluding water while spouting out a high speed air flow and at least plural layers of a solid- state partition having flexibility on the outer peripheral part of the nozzle. CONSTITUTION:A nozzle 1 for water shielding for locally excluding water is provided and on the outer peripheral part of the nozzle, a flexible solid-state partition 4 for shielding water is provided. These are independently movable. Further, the solid-state partition 4 is equipped with a mechanism to be pushed on the surface 6 of a member of the worked by a pressurizing spring 5. Further, this working device is equipped with a second nozzle for excluding and blocking water on the outer periphery of the solid-state partition 4, that is, a nozzle 10 for pressurizing the solid-state partition to be used for pressurizing the solid-state partition 4. The base part 11 of the solid-state partition 4 is always pressed on the surface of the material to be worked by compressed air or compressed gas or jet water 12, and comes into stable contact with the surface of the material to be worked. Therefore, water can be stably excluded while moving the base part 11 according to the surface shape of the member to be worked to execute stable welding under the water. |
