Title:
METHOD AND DEVICE FOR REPAIRING NOZZLE INNER FACE OF VESSEL
Document Type and Number:
Japanese Patent JP3918217
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform repair working of a nozzle inside face from the outside and enhance working without lowering a water level by draining off water by hanging down a water shielding case in the inside of a vessel and making a sealing state by covering a nozzle hole from the inside.
SOLUTION: A winder 2 disposed on a working floor FA is actuated, a water shielding case 3 hung by a hanging chain 21 is hung down in water W, and the seal edge part of the case 3 is brought into contact with the inner wall face of a vessel V so as to surround the inner opening of the nozzle hole of a nozzle N. A water supply and drain means 4 is operated, water of the inside of the water shielding case 3 is sucked, water is replaced by the air, and the nozzle hole and the inside of tubing are made air atmosphere. After it is made the gas atmosphere, the tubing connected to the edge of the nozzle N is cut and the edge is released as water is stored in the inside of the vessel V. A welding torch is inserted in the nozzle hole via a cut opening, and a clad layer is formed on the inner wall face of the vessel V and the inner face of the nozzle hole.
Inventors:
Kishio Kazuo
Application Number:
JP312897A
Publication Date:
May 23, 2007
Filing Date:
January 10, 1997
Export Citation:
Assignee:
Ishikawajima Harima Heavy Industries Co., Ltd.
International Classes:
G21C19/02; B23K9/00; B23K9/04; B23K9/127; G21C19/20; (IPC1-7): G21C19/02; B23K9/00; B23K9/04; B23K9/127; G21C19/20
Domestic Patent References:
| JP8304306A | ||||
| JP2105097A | ||||
| JP4029095A | ||||
| JP7035892A |
Attorney, Agent or Firm:
Masatake Shiga
Takashi Watanabe
Shigeo Naruse
Takashi Watanabe
Shigeo Naruse
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