| 摘要 |
PURPOSE:To remarkably improve accuracy of nozzle extension, out of roundness of a vessel, etc., without causing collapse, a fall, etc., of a nozzle due to deformation of the periphery of a hole part. CONSTITUTION:The leg 5 to mount the nozzle 1 on the external surface of the vessel 2 is provided on the peripheral part of the nozzle 1, an end part 7 of the nozzle 1 is engaged with the upward hole part 3 of the vessel 2 and the nozzle 1 is mounted on the external surface of the vessel 2 by the leg 5 and a groove part 8 formed of an inner peripheral edge of the hole part 3 of the vessel 2 and the tip 7 of the nozzle 1 is welded from the interior side of the vessel 2. |
